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CBECC-RES - Bruce A. Wilcox, PE

1. Currently Active Zone House 2j Name House Zone Status Existing 7 Type Conditioned Bi HVAC Sys Status Altered v J Verify Existing System _ I HY F Floor Area 1 440 2 Aterad WAC Sya none Stories 1 create new Altered HVAC System and apply only here iing Heit JO CAI WER i DHW Sys 1 Status Altered I Verify Existing DHW Sys 1 d 9 Artola i Altered DHW Sys 1 Tankless E Bottom 2 ft Win Head Height 6 67 ft DHW Sys 2 Status New E New DHW System 2 none E 10 3 CBECC Res User Manual Additions and Alterations 10 2 4 Duct Status The status of the distribution system can be defined as a distinct entry from the rest of the HVAC system Be sure to check the status after defining the HVAC system because the default status is new which triggers HERS verified duct leakage testing The duct status is set to Existing when the existing ducts are remaining in the existing zone only such as a separately defined HVAC system is being added for an addition Existing new when the same space conditioning equipment is conditioning both the existing and new zones the existing ducts will remain and new ducts are added for the addition An exception to duct leakage testing Exception 2 to Section 150 2 b 1E applies if less than 40 feet of duct in unconditioned space is added Check the box if that condition applies see Figure
2. Zone Data Currently Active Zone Conditioned Bi Name Conditioned Zone Status New X Type Living E Mi HVA 1 r Floor Area 1250 e HYAC System C System x Zonal control credit is a special feature Some of the requirements for this compliance option include each habitable room must have a source of space conditioning the sleeping and living zones must be separately controlled a non closeable opening between the zones cannot exceed 40 ft each zone must have a temperature sensor and a setback thermostat and the return air for the zone must be CBECC Res User Manual Mechanical Systems located within the zone A full list of eligibility criteria for this measure is found in the Residential Compliance Manual Section 4 5 2 8 2 Heating Systems The heating system is the equipment that supplies heat to an HVAC System Heating systems are categorized according to the types show in Table 8 1 8 2 1 Heating System Data other than heat pump See Figure 8 5 for the heating system data input screen which varies slightly by equipment type Boilers are not yet implemented However a hydronic system or combined hydronic system with a boiler can be modeled see Sections 8 2 6 and 9 7 8 2 1 1 Name User defined name for the heating system 8 2 1 2 Type Heating system type see Table 8 1 In version 3 all of the heating systems types other than boiler are enabled 8 2 1 3 Efficiency Enter an appropriate efficien
3. 124 2013 R19 FlrOwCrawl Cc Can Assign To Floors Over Crawlspace v Construction Type Wood Framed Floor Di Construction Layers topmost to bottom Cavity Path Frame Path Floor Surface Carpeted zl Carpeted z Concrete Fill L no concrete fill y L no concrete fill Floor Deck Wood Siding sheathing decking v Wood Siding sheathing decking Cavity Frame R 19 zl 2x12 16 in OC ad Sheathing Insulation L no sheathing insul y L no sheathing insul gt Exterior Finish Wood Siding sheathing decking e Wood Siding sheathing decking v I Non Standard Spray Foam in Cavity Figure 6 11 Floor over exterior Construction Data Currently Active Construction Ext Floor Cons y Construction Name Ext Floor Cons Can Assign To Exterior Floors a Construction Type Wood Framed Floor hd Construction Layers topmost to bottom Cavity Path Frame Path Floor Surface Carpeted v Carpeted 2 Concrete Fill no concrete fill y no concrete fill 8 Floor Deck Wood Siding sheathing decking y Wood Siding sheathing decking 7 Cavity Frame R 19 y 2x4 16 in O C Sheathing Insulation no sheathing insul v no sheathing insul iz Exterior Finish select finish zl select finish S M Non Standard Spray Foam in Cavity 6 11 1 Raised Floor Construction Data 6 11 1 1 Construction Name User defined name
4. Belongs to Zone Conditioned lo Surface Status New El Construction Flr Over Gar El Outside Garage El Floor Area 200 ft2 Floor Elevation 10 7 ft El Figure 7 12 Multi Family Interior Floor Interior Floor Data Currently Active Floor Interior Floor 1 hi Interior Floor Name Interior Floor 1 Belongs to Zone Conditioned 2 Surface Status New gt Construction Interior Floor Outside Conditioned z M Different Dwelling Unit on Other Side Floor Area 3 480 2 Floor Elevation 9 7 ft 7 4 2 1 Interior Floor Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 7 4 2 2 Belongs to Zone Select any appropriate zone already included in the building model When copying components of one zone to another this field automatically changes 7 4 2 3 Surface Status Select New Existing or Altered CBECC Res User Manual Building Envelope 7 4 2 4 Construction Interior raised floor If an appropriate construction assembly is not available right click and pick create discussed in depth in Chapter 6 Construction Assemblies 7 4 2 5 Outside The outside condition or adjacent zone 7 4 2 6 Different Dwelling Unit on Other Side A checkbox see Figure 7 12 is included when the project is identified as multi family to indicate whether another dwelling unit is on the other side of the surface being mode
5. 0 cee eecceceesseceseeseeceeceeseaeeeaeseaeseneeeeeeseeeseneseeeeeaeeeaes 6 9 Figure 6 4 Section at Attic Edge with a Raised Heel Truss 0 cee eeeceseeeseeeeecsecsaeceaeceaeeeaeseeeseeeseeeseeeeeaeenaes 6 9 Xi Figure 6 5 Cathedral Ceiling EEN 6 10 Figure 6 6 Wood Framed Wall Construction Data 6 12 Figure 6 7 Below Grade Walls AAA 6 14 Figure 6 82 Interior WallS 00ica a Avie epee ee dein ih ical aes Ce es A We a edad 6 15 Figure 6 9 Uninsulated Exterior Wall 6 15 Figure 6 10 Floor over crawl espace 6 16 Figure 6 11 Floor over eviertor EE 6 16 Figure 6 12 Interior dE 6 18 Figure 6 13 WiInGOw AE 6 19 Figure 7 12 CONCINONER ZONA eet A EE 7 1 Figure 2 Plan Orientation EE 7 2 Figure 7 3 Cathedral Ceili ar ra aa a a ra aaa m aaa a aaa aa ead aa aAA a aT aa AEE aa a ar aTa ESEA E eaae ARSE aiea 7 3 Figure TE Extenor Wal icon 7 5 EE ee Dee Ee Ee EE O Ena 7 6 Figure Te Party Walla A doi 7 6 Figure 77 Biere freie ATTEN 7 7 Figure 7 8 Attached EE EE Ea daaa taar iiie 7 8 Figure 9 Opaque Doa e A ttdsl E bie tie ee th 7 8 Figure 7 10 Raised e 7 10 Figure 7 11 Garage or Interior Hoor 7 11 Figure 7 12 Multi Family Interior Floor 7 11 Figure 7 13 Slab Floor Data EE 7 12 Figure 7 14 Underground Floor Data ooonocccccnnocicocnonoccncnanoncnnnnnoncnc nano ncnc nano cnn rro nn nr ran rre 7 14 Figure 7 16 Window Steet EES E An EAE E AAE A EAE O reseed ASEENA dai a ie cdi 7 15 Figure 7 4167 QOVemang si mi
6. 2 13 CBECC Res User Manual Tutorial Chapter 3 Tutorial Note This tutorial is specific to CBECC Res 2013 version 3 This is a step by step tutorial for modeling a simple single family residence in CBECC Res 2013 3 The tutorial can be completed in a few minutes and will help you become familiar with how components are created The tutorial begins with a blank project There are also example files included with the program These are described in Section 2 2 and are found in the CBECC Res Projects directory Not every input field will be discussed in this tutorial but every input has a description in the appropriate chapter Use the Table of Contents or the Index to find specific information Additional information may also be found in the 2013 Residential Alternative Calculation Method ACM Reference Manual which discusses how the standard design is determined which may provide insight on the compliance results TIP As you are progress through the tutorial look around each of the screens and fields so you get an idea where changes can be made when you are working on a project 3 1 Simple House Example The house pictured in Figure 3 1 has a 30 ft by 20 ft living area 8 ft ceilings with an attic above and a slab on grade floor Figure 3 1 Simple House Example On the south fa ade front is a single 3 0 x 6 8 front door The east right has a 3 0 3 0 window and north back facades has
7. CBECC Res User Manual Figure 9 5 Water Heater Data Small Storage Water Heater Data Currently Active Water Heater Min 50 Gal Ea Name Min 50 Gal Heater Element Type Tank Type Energy Factor Tank Volume Input Rating Recovery Efficiency Natural Gas Small Storage gt 0575 a gal 40 000 Btufhr only needed for Hydronic Space Heating Figure 9 6 Large Storage Water Heater Data Water Heater Data Currently Active Water Heater Large 75 G 80 TE 2 0 SBL Name Large 75 G 80 TE 2 0 SBL Heater Element Type Tank Type Efficiency Tank Volume Input Rating Recovery Efficiency 9 6 1 1 Name Natural Gas y Large Storage gt og Standby Loss Fraction 0 022 frac 75 gal 76 000 Btufhr only needed for Hydronic Space Heating Domestic Hot Water User defined name that is specified in the water heating system data for the field water heater see Section 9 4 1 6 9 6 1 2 Heater Element Type Choose electric resistance natural gas propane heat pump or oil 9 6 1 3 Tank Type Choose boiler indirect large instantaneous large storage small instantaneous small storage or unfired tank Most instantaneous water heaters are small based on the rated input see Section 9 2 9 6 1 4 Efficiency Certified efficiency from one of the sources listed in Section 9 1 Based on the tank type the efficiency is energy factor for sm
8. CBECC Res User Manual Getting Started 15 16 17 18 19 20 21 22 23 Unable to create or access analysis processing directory see Section 2 1 25 26 27 28 29 30 DHW simulation not successful 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 24 31 Energy CSE simulation weather file not found Error retrieving DHW weather file name from Proj DHWWthrFileName DHW simulation weather file not found Error retrieving required data Proj RunID and or Proj RunAbbrev Analysis processing path too long Error evaluating ProposedInput rules Error evaluating PostProposedInput rules Error evaluating BudgetConversion rules Error evaluating ProposedModelCodeCheck rules Unable to open delete write simulation output file csv or rep Unable to open delete write simulation weather file Error copying simulation weather file to processing directory Unable to open delete write simulation input cse file Error writing simulation input cse file CSE simulation not successful error code returned Error encountered loading CSE DLL s Error evaluating ProposedModelCodeCheck rules Error evaluating ProposedModelSimulationCheck rules Error evaluating ProposedModelCodeAdditions rules User aborted analysis via progress dialog Cancel button Error evaluating ProposedInput rules Error performing range and or error checks on building model Error evaluating CSE_SimulationClea
9. Cathedral Ceiling Cathedral Ceiling Data Currently Active Ceiling Cathedral Ceiling 1 x Ceiling Name Cathedral Ceiling 1 Belongs to Zone Conditioned y Surface Status New E Construction R30 Cathedral Ceiling El Ceiling Area 200 f2 Roof Rise 5 xin12 Orientation Left z Solar Reflectance 0 1 IR Emittance 0 85 7 2 2 1 Ceiling Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 7 2 2 2 Belongs to Zone Select any appropriate zone already included in the building model When copying components of one zone to another this field automatically changes 7 2 2 3 Surface Status The default condition is new for new construction Other options include existing and altered 7 3 CBECC Res User Manual Building Envelope 7 2 2 4 Construction If no appropriate construction assembly is available right click and pick create discussed in depth in Chapter 6 Construction Assemblies 7 2 2 5 Ceiling Area The area of the ceiling in square feet that meets all the same specified criteria If parts of the roof face different orientations they must be modeled separately 7 2 2 6 Roof Rise Specify the roof rise or roof pitch which is the number of feet the roof rises in a span of 12 feet eg shown on plans as 4 12 or 4 feet in 12 feet If there are multiple pitches you can enter the roof rise of the lar
10. Currently Active Cooling System Cooling 14 11 7 y Name Cooling 14 11 7 Type SplitAirCond Split air conditioning system y SEER 14 kBtu h kW EER us kuk Iw Use this EER in compliance analysis CFM per Ton 150 CFMiton Multi Speed Compressor AC Charge verifies gt Iw Zonally Controlled Refrigerant Type R4104 Sizing Factor Es ratio CBECC Res User Manual Mechanical Systems 8 3 4 Evaporatively Cooled Condenser This type of air conditioning is suited for hot dry climates The efficiencies are reported as multiple EER values at different conditions More information can be obtained from the 2013 Residential Manual Section 4 7 9 and a full list of compliance requirements is included in the 2013 Residential Appendices Residential Appendix RA4 3 2 This system type requires HERS verification of EER refrigerant charge and duct leakage testing An example file 1StoryExample18EvapCond ribd is included in the projects folder 8 3 4 1 EERa EER at 95 F dry bulb and 75 F wet bulb obtained from AHRI Certified Products Directory http www ahridirectory org 8 3 4 2 EERb EER at 82 F dry bulb and 65 F wet bulb This value must be tested and published by the manufacturer according to AHRI guidelines 8 3 5 Room Air Conditioners 8 3 5 1 Name User defined name for the cooling system 8 3 5 2 Type Cooling system type is RoomAirCond see Table 8 3 8 3 5 3 EER Enter the Energy Efficiency Rati
11. SHGC Exterior Shading Front Front 0 Insect Screen default Front Front 0 a Insect Screen default Insect Screen defaul Back Back 180 Left Left 90 S Insect Screen defaul AAN TJ O as O e Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 5 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd OVERHANGS AND FINS Overhang Left Fin Left a a ee Top Up EECHER Top Up Paes Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 6 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd OPAQUE SURFACE CONSTRUCTIONS a o pee A 07 Total Cavity Winter Design Construction Name Surface Type Construction Type R value U value Assembly L
12. Software updates 1 2 Status Darin rii 2 12 TOO Drill isi sees 2 4 LOOPS aaa 4 1 Tuto re EE 3 1 Ceiling below attic cccecsesescseeseseseseeeeeetetenens 6 4 Ceiling AAA O dree 5 2 Central fan integrated ventilation cooling 8 3 CF1R Druida io be 2 4 A E 1 3 Generating datt 2 4 Registering een 1 4 4 5 Watermarks edu nirera in aik 1 3 VE EE 8 2 8 3 CEI fixed Tonn seisiisnroginisii ninie 8 29 CFI variable speed een 8 29 CEM HOI E 8 18 VE EE 4 6 Climate zone 1 8 4 3 Close cell spray foam insulation ssss sssss101s 6 2 Combined hydronic DEW once A it 9 9 Combined hydronic heating c cccccmmmm oo 8 14 Compliance manager cemcececincnnnnononcncncnrrrncncnnnros 1 6 Conditioned zone EE 5 1 Construction types enabled een 6 1 Controlled ventilation crawl Space 5 8 COO TO ivi det 5 7 Cooling Evaporatively cooled condenser 8 20 ROOM Alita tia iaa citadas 8 20 Cooling equipment types 0 0 ccc 8 16 Cooling ventilation s sssssssssesseseseertereesseee 4 9 8 3 CEL PIXE geet 8 29 Whole house Ion 4 9 COP to HSPF eoguaton een 8 7 Crawls pace lidia inspira 5 7 EE 5 8 Deeply buried ducts en 8 25 Documentation author 1 3 Domestic hot water system 0 0 0 5 3 Doors VE 7 9 CBECC Res User Manual Opaque U factor 7 9 With glaSS ooocccoccnnncocononononrarinanonononcnraroros 7 9 7 19 Duc ad do 8 21 Bullitt iii ii 8 24 Bypass duc 8 24 HERS verified conditions 8 2
13. off to the right If no whole house fan is desired change the default prescriptive whole house fan to none and click lt OK gt 3 6 CBECC Res User Manual Tutorial 32 Click on the Mechanical tab and double click on the Heating or Cooling System to change the efficiencies Change the heating system to 80 not 0 80 33 Double click on Water Heater 1 Change the Energy Factor to 0 62 Click lt OK gt At this point either save the input file with a new name or close the PDF of the CF1R Save the file and perform the analysis to see if it still complies Figure 3 3 Updated Output for Simple House Energy Use Details Summary CAHP Standard Standard Standard Proposed Proposed Proposed Compliance Design Design Design Design Design Design Margin End Use Site kWh Site therms TD vn Site kWh Site therms KTDWA2yr KTDWAZ yr Space Heating 54 62 7 20 75 55 62 8 20 80 0 05 Space Cooling 374 37 41 398 39 72 2 31 IAQ Ventilation 62 2 21 62 2 21 0 00 Other HVAC 0 00 0 00 0 00 Water Heating 135 6 36 40 121 0 32 48 3192 PV Credit 0 00 0 00 Compliance Total 96 77 95 21 1 56 Inside Lighting 407 15 21 407 15 21 Result Appl amp Cooking 796 32 9 37 14 796 32 9 37 14 PASS Plug Loads 1 147 41 36 1 147 41 36 Exterior 5 0 17 5 0 17 TOTAL 2 844 231 1 190 65 2 871 216 6 189 09 results may vary slightly 3 7 CBECC Res User Manual Project Chapter 4 Project It is often best to start with an existing input file fo
14. 0 SEER 12 0 EER 350 0 CFM ton Attic Default E HVAC Fan System 1 050 CFM Watts CFM 3 Count 1 Split 14 12 0 55 WICFM 8 30 e Count CBECC Res User Manual Domestic Hot Water Chapter 9 Domestic Hot Water DHW The water heating system is defined at the zone level see Section 5 1 1 11 while the details of the systems are contained under the mechanical tab The information in this chapter is from the point of view of the mechanical tab 9 1 Efficiency Information Water heaters are required to be certified to the Energy Commission and the applicable efficiency values needed for modeling are found in the on line certified appliance directory http www appliances energy ca gov From this site an advanced search yields the most useful information which can be exported to a spreadsheet format for sorting and searching Alternatively data may be found in the Air Conditioning Heating and Refrigeration Institute http www ahridirectory org ahridirectory The AHRI directory does not contain the standby loss for large water heaters which is a required input The federal minimum energy factor used to establish the standard design changes for small water heaters effective April 16 2015 Type Volume Current Effective April 16 2015 Gas fired storage lt 55 gallons 0 67 0 0019 x Volume 0 675 0 0015 x volume gt 55 gallons 0 8012 0 00078 x Volume Electric storage lt
15. 00 0 00 Compliance Total 96 77 94 31 2 46 Inside Lighting 407 16 21 407 16 21 Result Appl amp Cooking 796 329 37 14 796 32 9 37 14 PASS Plug Loads 1 147 41 36 1 147 41 36 EAS Exterior 5 0 17 5 0 17 i TOTAL 2 844 231 1 190 65 2 796 236 5 188 19 28 The project complies Note that due to the defaulting built into the program it is assumed to have a cool roof radiant barrier and whole house fan As part of this tutorial we will try trading off some features If you notice the above compliance margin is in compliance on cooling so trading away some of the measures that help cooling is feasible 29 Double click on Attic This is where the Reflectance and Emittance values for a cool roof product are changed Change the Reflectance from 0 2 a cool roof to a default value of 0 1 The roof has a roof rise pitch of 5 12 is correct 30 NOTE For this tutorial we will not remove the radiant barrier but the Construction is where the radiant barrier above and below deck insulation not a typical ceiling as well as the roofing material are defined Note that the Construction is Asphalt Shingle Roof Click lt OK gt Move down to the Construction Assemblies click on the sign and double click on Asphalt Shingle Roof Because Package A in climate zone 12 has a radiant barrier the program included that feature 31 The default condition is also a whole house fan Find this feature by double clicking on Project and pick the Cool Vent tab
16. 1 14 6 Eu EE 1 8 iti 1 14 7 HERS Verificatton unnn inntas enunt n Ennan EAEE EEEE REAREA nana a nana nnnannninnns 1 8 Chapter 2 Getting Started aii 2 1 2 1 Installing CBEGCs ROG scsi ti id aaa 2 1 2 1 1 SEN IEN 2 1 2 2 Example Files iaa 2 1 2 3 Menu TEE 2 2 2 3 1 HMC Tee err IET 2 3 2 3 2 Cit apse eet Yes eat acces AAA ea ee eee ee cdo yaa ae Me en ag ered 2 3 2 3 3 a E e teeta tee ENEE ee ee 2 3 2 3 4 NEE 2 3 2 3 5 ele EE EE tans 2 3 2 3 6 Holman iia it ct ltda addition 2 4 2 4 TOO He 2 4 2 5 Main Zetting ated a ae a bd 2 5 2 6 Right Click Menu Options ccecceeeeeeeeeeeeecaeeeeaeeeeeeeeceaeeeeaaeeseaeeseeeeesaaeeesaaeseeeeeseaeeesaeeeeaaeseeeeeseetess 2 6 2 6 1 EI 2 6 2 6 2 Building Tree Controls Parent Child Helattonshipe 2 6 2 6 3 Rapid Edit EE 2 7 2 7 Keyboard Navigation 23 EE ee beck ies iia 2 7 2 8 Defining NeWGoOMpoOnentS EE 2 7 2 9 EIER 2 8 2 9 1 Energy Use Detali gens begeggesuegtage eeesieseiet ene deepest Mens fae eed re aaa Mie ee 2 8 2 9 2 lu EE 2 8 2 9 3 GALA LE 2 9 2 10 Error MOSSAQES ccoo E ei ai i iii di i 2 9 2 11 Managing Project EE 2 11 2 12 Input Dialog WINGOWS oseiro annia EENE EE EEEa eaii 2 12 2 13 Background ee 2 12 2 14 Status Baron lait ta diet eerie iia ee diia 2 12 Chapter 3 Tutorials deeg vate cstt did 3 1 3 1 Simple House Example rieira rrarradinearruadepanrdicnn aiioa andidan saa dapada dian kaksipidi iaraa na dapada dadasi Ea aa Eaa 3 1 Chapter4 AO 4 1 4 1 Tool Ti
17. 10 4 Altered when all the existing ductwork is being replaced and new ducts are being added for the addition New or altered when an existing non ducted system is being replaced with a ducted system Figure 10 4 Less than 40 feet of new duct Distribution System Data Currently Active Distribution System Ducts Name Ducts Status Existing 4 y Type Ducts located in attic x l Has Bypass Duct M New ducts less than 40 ft Use defaults for all inputs below F Low Leakage Air Handler Duct Insulation R value 6 0 e F ft2 h Btu Existing R value 2 1 ei F ft2 h Btu 10 2 5 Water Heating Status Water heating is assigned to the dwelling unit not to specific floor area In the existing zone the water heating status is either existing or altered and is never new Existing status is used if no water heating changes are being made it is also acceptable to model none for the Existing DHW System name Altered status is modeled if the water heater is being replaced New status is only used in the new zone if an additional water heating system is being added to supplement the existing water heater NOTES 10 4 CBECC Res User Manual Additions and Alterations 1 Because the status of a DHW system cannot be changed once it is created begin at the Zone Data tab see Figure 10 3 select the appropriate status and if necessary define the system 2 To avoid any confusion about the number of water heate
18. 2 Recirculation LOOPS umia bid de OG candace dE Ee BEA At ada AAA tad 9 5 Figure 9 3 Solar Water Heating Data Anna 9 6 Figure 9 4 Solar Water Heating Data Monthly 0 ceccceeeeeeceneeeeeeeeeeeee eae eeeeaeeeeeeeecaeeeeaaeeeeeeeseeeetaeeseaeeseeeeen 9 6 Figure 9 5 Water Heater Data Small Storage o oooocinnnicinnicnnnnnnnccnnccncccrnnn nro crac rara 9 7 Figure 9 6 Large Storage Water Heater Data 9 7 NsllCEDAesiusliea ele 9 9 Figure 9 8 Water Heating Combined Hydronic ccceccceeeeeeeeeeeeeeeeeeeaeeeeeee na cnn 9 9 Figure 9 9 Water Heating Separate Hvdronic nana nanc cnn crac rra 9 10 Figure 9 10 Water Heater from an HVAC System ooccccincccinnccnnoncccnonnnononcnnnn cnn c cnn arrancan rara 9 11 Figure 9 11 Water Heating Correctly Connected to HVAC ooooccccnncococonononnnnnoonnononononnnnnnonnnonnncnnnn rn nrnnnn rra 9 11 Figure 10 1 Addition Alone RUN Gcope ooccociccinncnnnconnconncnonnono nono no no nono nono nor rornorrrrrrrrrrrn 10 1 Figure La MEI Er 10 2 Figure 10 3 EAA HVAC System Gtats ccc cen ceneceeeeeneeeeeeeeeeseeeeseeeseeeseeesseeseaeesaeesaeesaesnaessaeseaeessaeenaees 10 3 Figure 10 4 Less than 40 feet of new duc 10 4 Figure 10 5 Addition HVAC and DHW cccceeccecsceeseeceeeeeeecaeecaaeceaeecaaecaaecaaeceaeeeaescaeegeeeseeeseeeeeaeeseeseeeeiaesnaees 10 6 Figure 10 6 Altered with Verified Existing Conditions ccceccceceeeeeceeeeeeneeeeeeeeceaaeeesaaeseeeeeseaeeesaeeseeeseee
19. 55 gallons 0 97 0 00132 x Volume 0 960 0 0003 x Volume gt 55 gallons 2 057 0 00113 x Volume For a 50 gallon water heater the change is from 0 575 to 0 60 Energy Factor for gas and 0 904 to 0 945 Energy Factor for electric 9 2 Water Heater Types Tank types are based on the Appliance Efficiency Regulations definitions e Small storage has an input of less than or equal to 75 000 Btu gas propane less than or equal to 105 000 Btu hr oil less than or equal to 12 kW electric or less than or equal to 24 amps heat pump e Small tankless has an input of less than or equal to 200 000 Btu per gas propane 210 000 Btu per hour or less oil fired or 12 kW or less electric A tankless water heater is a water heater with an input rating of at least 4 000 Btu per hour per gallon of stored water 9 1 CBECC Res User Manual Domestic Hot Water e Large storage has an input greater than 75 000 Btu hr gas or propane greater than 105 000 Btu hr oil fired or greater than 12 kW electric Rated with thermal efficiency and standby loss e Large tankless has an input of greater than 200 000 Btu per hour gas propane greater than 210 000 Btu per hour oil fired or greater than 12 kW electric Tankless water heater is a water heater with an input rating of at least 4 000 Btu per hour per gallon of stored water e Boiler is a space heater supplying steam or hot water for space heating e Indirect is a water heater consisting of a storage tank with no
20. 6 16 CBECC Res User Manual Construction Assemblies 6 11 1 2 Can Assign To This is a fixed field To create a new assembly type at the zone level pick create and make the appropriate construction assembly type 6 11 1 3 Construction Type Options include wood and steel frame not yet implemented construction or SIPs 6 11 2 Raised Floor Construction Layers top to bottom 6 11 2 1 Floor Surface The available floor surface types are carpeted hardwood tile and vinyl 6 11 2 2 Concrete Fill Default is no concrete fill Select no concrete fill or concrete fill 6 11 2 3 Floor Deck Select 1 no floor deck or 2 wood siding sheathing decking 6 11 2 4 Cavity Frame List the compressed R value of cavity insulation see Section 6 1 in the cavity column The framing column is to indicate the size of the framing and the spacing e g 2x6 with 16 inch on center framing or panel size for SIPs 6 11 2 5 Sheathing Insulation List the sheathing or insulation layer on the outside of the framing Options are none gypsum board and R1 to R60 insulation 6 11 2 6 Exterior Finish or Ceiling Below Finish Optional input 6 11 2 7 Non Standard Spray Foam in Cavity This check box identifies additional documentation and HERS verification requirements due a claimed R value that exceeds the default assumption of R 5 8 per inch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 11 3 Floor Over Garage A floor over
21. 7 1 10 Fixed and Restricted Inputs When the specified analysis type is compliance fixed and restricted inputs cannot be changed by the user Since example files may include assumptions that are not standard in a given climate zone to determine the standard assumption for a given input consult either Standards Section 150 1 Package A or the ACM Reference Manual 1 11 Preparing Basic Input The software includes several example files and the user manual provides a tutorial as well as a guide through program inputs Required inputs include p Building address climate zone front orientation and availability of natural gas Conditioned floor area and average ceiling height Attic roof details roof pitch roofing material solar reflectance and emittance Ceilings below attic and vaulted ceiling R values Wall areas orientation and construction details Door areas and orientation Slab or raised floor area and construction details Window and skylight areas orientation U factor Solar Heat Gain Coefficient Building overhang and side fin shading Mechanical heating and cooling equipment type and efficiency Distribution system location and construction details Method for providing mechanical ventilation and Domestic water heating system details including type of water heating equipment fuel type efficiency distribution system details O O SS O E mmempa NEOS 1 5 CBECC Res User Manual Overview 1 12 Che
22. DHW see Figure 8 7 and enter the tank volume insulation R value and ambient conditions Figure 8 7 Air to Water Source Heat Pump Heat Pump Data Currently Active Heating System AWHeatPump x Name AWHeatPump Type AirToVWaterHeatPump Air to water heat pump able to heat DHW v AirToWaterHeatPump An indoor conditioning coil a compressor and a refrigerant to water heat exchanger that provides heating and cooling functions Also able to heat domestic hot water Efficiency Metric COP Heating Performance Cooling Performance Capacity Btuh COP ratio EER 11 7 Mtb 47 30 000 3 emt 18 000 18 HVAC System Data Heating Equipment Cooling Equipment Heat Pump Equipment Currently Active HVAC System hvac System 1 gt System Name HVAC System 1 System Type Heat Pump Heating and Cooling System gt Area Served 2 100 1 story Heat Pump s El Unique Ht Pump Unit Types Heat Pump JAWHeatPump gt Count 1 I Ducted Ht Pump s 1 AirToWaterHeatPump unit s 47 COP 3 0 Cap 30 000 Btuh Vv 11 7 EER IZ System Heats DHW DHW Inputs 590AWHP 1 Story Example Rev 11 2 DHW Heating Equipment Data Tank Volume 50 gal Distribution nonducted yl Insul R value 12 F A2 h Btu Ambient Conditions Unconditioned 4 Fan HVAC Fan 1 al activate CFI cool y Help Done 8 10 CBECC Res User Manual Mechanical Systems 8 2 4 Ground
23. Install For components you wish to C all Users install Just Me a CBECC Res 2013 1c Components CBECC Res 2013 Desktop Shortcut ET e e Description Space required 129 8MB 2 1 1 File locations CBECC requires a file installation structure that has three locations 1 executable 2 data and 3 projects folders The default locations are Executable c Program Files CBECC Res 2013 Data c Documents and Settings user CBECC Res 2013 Data Projects c Documents and Settings user CBECC Res 2013 Projects Installing CBECC Res on a network may result in invalid path names CBECC Res should be installed on a local or mapped drive rather a name with as part of the path name If the program will not run consider uninstalling to reestablish the path names and reinstall 2 2 Example Files The first time you use CBECC Res it is highly recommended that you spend a few minutes going through the tutorial in Chapter 3 The following example files are included in the projects directory 2 1 CBECC Res User Manual Getting Started 10 11 12 13 14 15 2 3 1StoryExample18 ribd Based on the Energy Commission s 2100 ft single floor prototype with slab on grade floors a tile roof an attached garage window dimension inputs overhangs with the garage modeled as a fin providing shading to windows 1StoryExample18Cathedral ribd Same as above with cathedral ceilings 1StoryExample18Crawl r
24. Position Flap Ht Depth 1 00 ft Extends Left 3 00 ft Flap Ht 0 40 ft Dist Up 1 33 ft Extends Right 25 00 ft 7 7 2 5 Flap Height Default 0 feet If the overhang has a flap that extends lower than the bottom of the overhang thereby increasing the potential shading of the overhang this added length is modeled as the flap height 7 7 3 Window Fins A window fin is a building feature that provides shading benefit to a window for example a recessed entry area Figure 7 17 shows inputs found in the Window Fins tab 7 7 3 1 Left Fin Depth Depth in feet of the wall fin to the left of the window that provides shading to the window 7 17 CBECC Res User Manual Building Envelope 7 7 3 2 Distance Left Distance in feet from the left edge of the window to the left fin 7 7 3 3 Top Up Distance in feet from the top of the window to the top of the wall fin 7 7 3 4 Bottom Up Distance in feet from the bottom of the window to the bottom of the left fin Figure 7 17 Window Fin Window Data Window Overhang Window Fins Currently Active Window WinFrontLef D Window Fin Dimensions amp Positions Depth Top Up Top Up Dist L i Bot Up ek Left Fin een Right Fin Left Fin Right Fin Depth 12 00 ft TopUp 1 33 ft Depth 0 00 ft TopUp 0 00 ft DistL 100 ft BotUp 0 00 ft DistR 000 ft BotUp 0 00 ft 7 7 3 5 Right Fin Depth Depth in feet of the wall
25. R4 Synthetic Stucco R4 Synthetic Stucco Non Standard Spray Foam in Cavity Winter Design U value 0 065 Btu h ft2 F meets max code 0 065 U value 0 065 6 10 2 Framed Wall Construction Layers inside to outside 6 10 2 1 Inside Finish Default value gypsum board 6 10 2 2 Sheathing Insulation List the sheathing or insulation layer in a wall on the inside surface conditioned space side of the framed wall or the size and material of furring on the inside surface Options are none gypsum board wood sheathing and R 1to R 60 insulation 6 10 2 3 Cavity Frame List the compressed R value of cavity insulation see Section 6 1 in the cavity column The framing column is to indicate the size of the framing and the spacing e g 2x6 with 16 inch on center framing or advanced wall framing AWF see Section 6 5 6 12 CBECC Res User Manual Construction Assemblies 6 10 2 4 Sheathing Insulation List the sheathing or insulation layer on the outside of the framing Do not enter 1 coat stucco here Options are none gypsum board wood sheathing and R 1to R 60 insulation 6 10 2 5 Exterior Finish Exterior finish options are wood siding 3 coat stucco or R4 synthetic stucco also known as 1 coat stucco 6 10 2 6 Non Standard Spray Foam in Cavity This check box identifies that additional documentation and HERS verification requirements apply because the claimed R value exceeds the default assumption of R 5 8 per in
26. Rater verification is based on the existing windows having a 0 40 U factor and 0 35 SHGC or 0 50 in zones with no SHGC requirement So the amount of credit received for this proposed alteration is based on how much lower than 0 40 is the U factor of the proposed windows or how much lower is the SHGC than 0 35 While ilf verified by a HERS rater the standard design is set using the actual efficiency of the existing windows which is 1 28 U factor and 0 80 SHGC 10 3 2 Efficiency Threshold Another factor in determining the amount of credit or even a penalty that is achieved by an alteration is the proposed efficiency of the alteration If an altered component does not meet the mandatory or prescriptive requirement set out in Section 150 2 the standard design will be based on the higher level For example if a ceiling has a verified insulation level of R 11 but the proposed alteration is to achieve R 19 the standard design is based on the Standards requirement of R 30 and the proposed ceiling alteration will receive an energy penalty 10 5 CBECC Res User Manual Additions and Alterations 10 4 Addition The addition is modeled as a separate zone identified by a zone status of new Set the surface status to new for all envelope components in the addition including existing components in a previously unconditioned space The exception is an existing HVAC system being extended for the addition see Section 10 5 2 for an explanation o
27. Ratio SEER For equipment tested only with an EER enter the EER as the SEER When a value higher than 13 SEER for Compliance 2014 is modeled it triggers a HERS Verification of High SEER With Compliance 2015 the minimum efficiency requirement of the Appliance Efficiency Standards changes to 14 SEER and only when an SEER higher than 14 is modeled is a HERS Verification of High SEER triggered Efficiency information can be obtained from an advanced search of the Energy Commission s appliance directories http www appliances energy ca gov or from the AHRI Certified Products Directory http www ahridirectory org 8 2 2 7 EER Cooling equipment Energy Efficiency Ratio EER CBECC Res has default values for the EER based on the SEER value modeled Two conditions will result in a HERS verified EER a An EER higher than the default of 11 3 for Compliance 2014 or higher than 11 7 for Compliance 2015 and b checking the box M Use this EER in compliance analysis Because the EER depends on the specific combination of coil and condenser model numbers other than default EER ratings can be obtained from AHRI directory http www ahridirectory org 8 2 2 8 CFM per Ton The mandatory requirement for cooling airflow is 350 CFM ton for ducted cooling systems also assumed for dwellings with no cooling or 150 CFM ton for Zonal Single Speed systems Users may model a higher airflow All cooling systems require HERS
28. Res User Manual Additions and Alterations Chapter 10 Additions and Alterations Additions and alterations are one of the more complex parts of the Standards Section 150 2 contains the applicable provisions This section changed with the 2013 standards and prescriptive compliance has exceptions based on the size of a project that can often make prescriptive compliance a better fit for a project you should consider it before proceeding Also prescriptive forms for projects that do not require any HERS verification are now available on the Energy Commission s website see http www energy ca gov title24 2013standards res compliance forms and select Alterations and Additions Paper Forms October 2014 CBECC Res can model addition alone alteration alone or existing plus addition alteration For alteration alone the performance compliance approach can only be used if two or more components are altered These components include the building s envelope insulation fenestration space conditioning HVAC equipment duct system water heating system or roofing products The scope for an alteration alone or for existing plus addition is Alteration and or Addition The scope for an Addition Alone is Newly Constructed with a check for Addition Alone see Figure 10 1 and the fraction of the dwelling unit calculated as addition existing addition Figure 10 1 Addition Alone Run Scope Project Analysis Building Dwelling Units L
29. Residential Compliance Manual Section 5 3 and Reference Appendices Residential Appendix RA3 6 9 3 CBECC Res User Manual Domestic Hot Water 9 4 Water Heating System Data The water heating system is identified on the conditioned zone data tab for single family see Section 5 1 1 and the dwelling unit type tab for multi family dwellings see Section 5 6 NOTE Ifa single family residence has multiple water heaters e g two tankless units either identify two distinctly named systems or include all water heaters that have the same distribution system in one DHW system Specifying the same system multiple times even in another zone will not accurately reflect multiple water heaters 9 4 1 1 System Name User defined name This is the same name that was provided under the Zone Data tab see Section 5 1 1 11 9 4 1 2 Distribution type Drop down menu with options based on the building and water heater type being specified See Section 9 3 and Table 9 1 For installation and compliance requirements see Residential Compliance Manual Chapter 5 and Reference Appendices Residential Appendix RA3 6 and 4 4 In a multi family building with central water heating the distribution type within the dwelling unit is limited to one of three types standard pipe insulation or pipe insulation with HERS verification 9 4 1 3 Multi Family Hot Water Distribution Type Drop down menu with options for the level of control on the recirculating system
30. Source Heat Pump Because there is no current method for simulating the performance of these systems they are modeled as equivalent to a standard design ducted system split system heat pump The characteristics modeled are reported on the CF1R An example file included with the program 1StoryExamplel8HVAC ribd contains a ground source heat pump system If the system provides water heating see Section 9 8 8 2 4 1 Name User defined name for the system 8 2 4 2 Type Heat pump system type is Ground Source Heat Pump as shown in Table 8 2 8 2 4 3 Heating Performance Enter the Coefficient of Performance COP Efficiency information for a specific model number is found by performing an advanced search in the Energy Commission s appliance directories tp www appliances energy ca gov or from the AHRI Certified Products Directory http www ahridirectory org 8 2 4 4 Capacity Capacity of the proposed heat pump model 8 2 4 5 EER Cooling equipment Energy Efficiency Ratio EER 8 25 Mini Split Heat Pump See Figure 8 8 for mini split or multi split heat pumps input screens An example file 1StoryExample18HVAC ribd is included in the projects folder Distribution system and fan can be set to none on the HVAC System Data screen see Figure 8 2 8 2 5 1 Name User defined name for the system 8 2 5 2 Type Heat pump system type is ductless heat pump from Table 8 2 8 2 5 3 Heating Performance Enter th
31. Status New Y EA F2 E A Front Dr Multiplier 1 Bi Left Bu a SC SE Skylight Area Am BB B2 NFRC U factor 0 44 Btuh ft2 F ES B3 SGD a Right Solar Ht Gain Coef D pe BR Source of Ufactar SHGC NFRC be GarToHouse Front 7 8 1 1 Skylight Name User defined name If the plans use a window schedule or unique identifier that identifier can be used for the window name Each skylight on a given surface must have a unique name 7 8 1 2 Belongs to Cathedral Ceiling Defaults to the cathedral ceiling on which you picked create 7 8 1 3 Skylight Area Area of the skylight in square feet 7 8 1 4 Skylight Status Select New Existing or Altered 7 8 1 5 Multiplier The number of identical skylights 7 19 CBECC Res User Manual Building Envelope 7 8 1 6 NFRC U factor U factor from National Fenestration Rating Council for the skylight www nfrc org or default from Section 110 6 Table 110 6 A 7 8 1 7 Solar Heat Gain Coefficient Solar Heat Gain Coefficient SHGC from National Fenestration Rating Council for the skylight www nfrc org or default from Section 110 6 Table 110 6 B 7 8 1 8 Source of U factor SHGC The three valid sources are NFRC default or Alternate Default Fenestration Procedure ADFP See Section 7 7 1 13 7 20 CBECC Res User Manual Mechanical Systems Chapter 8 Mechanical Systems The heating cooling duct distribution system and space conditioning fans are defined at the zone le
32. The ceiling is defined as the interior upper surface of a space separating it from an attic plenum indirectly or directly conditioned space or the roof assembly which has a slope less than 60 degrees from horizontal definition from Reference Appendices 6 6 4 Knee Wall A knee wall is a sidewall separating conditioned space from attic space under a pitched roof Knee walls are modeled in CBECC Res as an interior wall although actually a demising surface and are insulated as an exterior wall 6 6 5 Low Slope Roof A low slope roof has a ratio of rise to run or pitch of 2 in 12 or less lt 9 5 degrees from the horizontal Although a specific value is not mandatory the standard design for a low slope roof in climate zones 13 and 15 is a 0 63 aged solar reflectance If the roof membrane has a mass of at least 25 lb ft or the roof area incorporates integrated solar collectors the roof may assume the standard design value for solar reflectance exceptions to Section 150 1 c 11 6 6 6 Radiant Barrier A radiant barrier installed below the roof decking reduces radiant heat to any ducts and insulation below While not a mandatory requirement the standard design used to establish a building s energy budget has a radiant barrier in climate zones 2 15 Installation requirements for a radiant barrier see CF2R form require the radiant barrier in the garage unconditioned space if a radiant barrier is installed in the attic over conditioned
33. The roofing material and roof structure is specified via the Roof Deck Surface Construction which is accessed under construction assemblies or by creating a new roof construction assembly as discussed in Chapter 6 Construction Assemblies 5 3 2 7 IR Emittance The default infrared or thermal emittance or emissivity for all roofing materials is 0 85 Otherwise enter the emittance value published by the Cool Roof Rating Council CRRC www coolroofs org If the roof membrane has a mass of at least 25 lb ft or for any roof area that incorporates integrated solar collectors the roof may assume the Package A emittance value see Section 5 3 3 If the roof is a cathedral ceiling or rafter roof the emittance is defined as part of the roof ceiling rather than an attic see Chapter 7 Building Envelope The roofing material and roof structure is specified via the Roof Deck Surface Construction which is accessed under construction assemblies or by creating a new roof construction assembly which is discussed in Chapter 6 Construction Assemblies 5 6 CBECC Res User Manual Zones 5 3 3 Cool Roof Cool roof is a term that refers to the ability of roofing materials to both reflect and absorb solar heat It typically means a high solar reflectance and a high emittance but can also be a low emittance and a very high solar reflectance Although specific values are not mandatory Package A the basis of the standard design contains a minimum
34. center framing 6 7 2 5 Inside Finish This is the inside finish if any of the attic space and does not include the ceiling below the attic A layer of gypsum is not typically included 6 7 2 6 Non Standard Spray Foam in Cavity This check box identifies additional documentation and HERS verification requirements due a claimed R value that exceeds the default assumption of R 5 8 per inch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 7 2 7 Radiant Barrier Exposed on the Inside This check box identifies whether a radiant barrier is being installed in the attic 6 8 Ceiling Below Attic and Interior Ceilings The ceiling below attic is typically where insulation is installed when it separates conditioned space from the attic zone Figure 6 2 Interior ceilings are used to define surfaces separating conditioned space from another conditioned space or an enclosed unconditioned space 6 8 1 Ceiling Construction Data 6 8 1 1 Construction Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 6 8 1 2 Can Assign To This is a fixed field To create a different assembly type at the zone level pick create and select the appropriate construction assembly type 6 8 1 3 Construction Type Options are wood framed or steel framed not yet implemented 6 7 CBECC Res User Manual Construction Assemblies Figure 6 2
35. combination of ceilings below attic modeled as part of the conditioned and unconditioned zones 5 3 2 4 Attic Status Default is new Other options include altered and existing for Existing Addition Alteration analysis 5 3 2 5 Construction The roof construction is the connection to an assembly that contains the roofing material such as tile or asphalt shingles radiant barrier and other construction details including above and below deck insulation but not typical ceiling insulation see more in Chapter 6 Construction Assemblies 5 3 2 6 Solar Reflectance The default aged solar reflectance is 0 10 for all roof types The aged solar reflectance for a roof product published by the Cool Roof Rating Council CRRC www coolroofs org or calculated from the initial value using the equation in 3 7 1 of the 2013 Residential Compliance Manual The aged solar reflectance measures the roofing product s ability to reflect solar heat A higher value is better for warmer climates so if a specific product color is unknown use a lower value among options to avoid having to recalculate compliance during construction If the roof membrane has a mass of at least 25 lb ft or any roof area that incorporates integrated solar collectors the roof may assume the Package A solar reflectance value see Section 5 3 3 If the roof is a cathedral ceiling or rafter roof the solar reflectance is defined as part of the ceiling see Chapter 7 Building Envelope
36. conditions that were verified by the HERS Rater Model the appropriate conditions for the ducts which may be altered if the existing ducts are being altered this includes new ducts in the addition as altered ducts will require duct leakage testing new if ducts did not previously exist or existing new if only the ducts in the addition are new 10 8 CBECC Res User Manual Additions and Alterations Figure 10 9 Existing System HVAC System Data Heating Equipment Cooling Equipment Heat Pump Equipment Currently Active HVAC System Existing System gt System Name Existing Systern Status Existing v System Type Other Heating and Cooling System Area Served 1 665 0 stories La Heating Pa Unique Heating Unit Types Heating Unit Existing Furnace gt Count 1 Vv 1 CntriFurnace unit s AFUE 75 0 iv Cooling DI Unique Cooling Unit Types Cooling Unit Existing AC lt i Count 1 Vv 1 SplitAirCond unit s 8 0 SEER 7 1 EER 350 0 CFM ton Iv Distribution Ducts Fan Existing HVAC Fan activate CFI cool vent via Cool Vent tab of the Project data dialog Figure 10 10 Duct System Distribution System Data Currently Active Distribution System Ducts z Name Ducts Status Existing 4 y Type Ducts located in unconditioned attic M Has Bypass Duct M Use defaults for all inputs below x Duct Leakage Sealed and tested z Duct Insulati
37. dd tibia 7 12 7 6 Below Grad abrir A A a eel 7 13 7 7 WINdOWS is tor Seed 7 14 7 7 1 Window Data dE aa 7 15 7 7 2 Window Overhang in iria A At Aa 7 16 7 7 3 Widow LEE 7 17 7 7 4 Glass Ke 7 19 7 8 SKY Sta A A E A A A a ds 7 19 Chapter 8 Mechanical SySteMS ccomnmmocinnnnnnccccncencrc rc 8 1 8 1 HVAC System RTE 8 1 8 1 2 Multiple HVAC Systems ooooccccnocononccoconccononcnanoncnoncc cnn cananea nenas 8 3 8 1 3 LOCO A E a 8 4 8 2 Heating SEM A e el 8 5 8 2 1 Heating System Data other than heat pump cnn nnn nana n naar nn nanccnina 8 5 8 2 2 Central Air Conditioning Heat Pumps Air Source oooccccinccconocccnncccnonccnnonananononancnc anna nana nn rancios 8 6 8 2 3 Air to Water Source Heat Pump reeon teari a aeaaea aaaea aaan aaae aaa Aaa aaa aa aaia 8 9 8 2 4 Ground Source Heat PUMP c ccccecceceeeeeeeeeeeeeeeceeeeeceaeeecaaeseeeeceaeeesaaeseeaeeseeeeseaeeesiaeeseaeeeeaes 8 11 8 2 5 Mini Split H at PUMP usina aabt 8 11 8 2 6 Room Air Conditioning Heat PUMPS occccocccinoccnonoccnoncnononcnononnnonc cnn nn nano nn nnn cnn c ran rana ranma 8 12 8 2 7 Combined Hydronic and Hydronic Heating coooccccnnncconociconoconanccnnonnno nana nano cnn cnc cnn ranma 8 14 8 2 8 Hydronic Distribution Systems and Terminals oonccnnnncinnnnnnnccnncccnnccnnncccna nc ccnnrncn rra cnn 8 14 8 2 9 NOD HENO dali 8 15 8 2 10 Non central Heating castidad aa 8 15 8 3 Cooling Systems cima a adi aida 8 15 8 3 1 Cooling System Data ispre iana iaei
38. floor of a 2 story home is modeled as a separate zone the number of stories is 1 for each zone If the home is modeled as a single zone then this value is the number of stories in the home limited to 3 5 1 1 6 Ceiling Height Average ceiling height in feet 5 1 1 7 Floor to Floor Distance between the floor being modeled and any floor above Default value is average ceiling height plus one foot 5 1 1 8 Bottom The value input depends on how the building is zoned and whether there are below grade surfaces It is the distance above grade of the surface of the floor in feet or below grade negative value in feet A slab floor will be the height from the grade to the top of the slab such as 0 7 A raised floor will be the height from grade to the top of the raised floor if there is a crawlspace this value is at least 2 For multi story buildings if the upper floors are modeled as a separate zone the bottom must be the total distance from grade to the bottom of the floor e g if the first floor is at 0 7 feet with 10 feet as the floor to floor height the second floor bottom is 10 7 5 1 1 9 Window Head Height Default value is based on the average ceiling height program will establish this value based on ceiling height 5 2 CBECC Res User Manual Zones 5 1 1 10 HVAC System Identify the name of the heating ventilating and air conditioning HVAC system by picking a defined system or creating a new system The system
39. for solar reflectance exceptions to Section 150 1 c 11 6 7 Attic Construction Attic constructions are accessed by creating a new attic roof construction or modifying an existing assembly in the list of Construction Assemblies The attic construction is the zone containing the roofing material e g tile asphalt above or below deck insulation and the radiant barrier A typical attic does not include the ceiling or ceiling insulation modeled as the ceiling below attic There is no orientation associated with an attic roof 6 7 1 Attic Construction Data 6 7 1 1 Construction Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 6 7 1 2 Can Assign To This is a fixed field To create a new assembly type at the zone level select lt create gt and pick the appropriate construction assembly type 6 5 CBECC Res User Manual Construction Assemblies Figure 6 1 Attic Construction Data Construction Data Currently Active Construction Asphalt Roof v Construction Name Asphalt Roof Can Assign To Attic Roofs z Construction Type Wood Framed Ceiling v Roofing Type fall others 5 Construction Layers topmost to bottom Cavity Path Frame Path Roofing Light Roof Asphalt Shingle T Light Roof Asphalt Shingle y Above Deck Insulation no insulation v no insulation T Roof Deck Wood Siding sheathing decki
40. heating elements or combustion devices connected via piping and recirculating pump to a heat source consisting of a boiler 9 3 Distribution Types 9 3 1 Single Family Distribution Type Distribution types Figure 9 1 range from standard distribution system multiplier 1 0 to recirculating with no control distribution system multiplier 7 0 as options with no HERS verification requirement Some systems are allow for a higher credit if the system will be verified by a HERS rater See Table 9 1 for a comparison of the multiplier lower number equals more efficient system More information about distribution types can be found in Residential Compliance Manual Section 5 3 and Reference Appendices Residential Appendix RA3 6 Figure 9 1 Single Family Distribution Systems Water Heating System Data Solar Water Heating Data Recirculation Loops Currently Active DHW System Min Gas y System Name Min Gas Distribution Type Standard DI specify Standard Pipe Insulation All Lines Insulated and Protected Pipe Below Grade Parallel Piping Recirculation Non Dernand Control Recirculation Demand Control Push Button Recurculation Demand Control Occupancy Motion A HERS req d Pipe Insulation All Lines HERS req d Parallel Piping HERS req d Recirculation Non Demand Control HERS req d Recirculation Demand Control Push Button HERS req d Recirculation Demand Control Occupancy Motion HERS req d Point of Use HERS
41. information about how the standard design is established can be found in the Reference Manual see Section 1 13 1 14 5 Mandatory Requirements Mandatory requirements are found in Sections 100 0 through 110 10 and 150 0 of the Standards Any requirement that is mandatory some are modeled some are not cannot be removed from the proposed building For example a building in climate zone 10 may be built without a whole house 1 7 CBECC Res User Manual Overview fan as long as it complies without that feature because the whole house fan is a feature of Package A in Section 150 1 however duct leakage testing requirements contained in Section 150 0 m cannot be removed While the standard design building has all of the features of Package A measures that are more efficient or less efficient can be modeled in the proposed design as long as it meets the mandatory minimum requirements and meets the energy budget A partial list of the changes affecting the building envelope is a minimum of R 30 ceiling roof insulation R 19 raised floor insulation and a maximum of 0 58 U factor for window see Section 150 0 q for exceptions Space conditioning system mandatory requirements include ducts with R 6 insulation that are sealed and have tested duct leakage air handler fan efficacy of 0 58 W CFM or less and cooling airflow of greater than 350 CFM ton These measures require a Home Energy Rating System HERS rater 1 14 6 Climate Zone California
42. outdoor air ventilation central heat cool system for central fan integrated night ventilation cooling variable speed for example NightBreeze or e Other heating and cooling system for typical HVAC systems and when modeling central fan integrated night ventilation cooling fixed speed for example SmartVent which is activated by selecting CFI on the Cool Vent Tab if more information is needed see Section 4 8 Figure 8 2 HVAC System Data HVAC System Data Heating Equipment Cooling Equipment Heat Pump Equipment Currently Active HVAC System Hvac System 1 E System Name HVAC System 1 System Type Other Heating and Cooling System y Area Served 2 100 1 story Heating La Unique Heating Unit Types Heating Unit Min Fum 78 El Count 1 Vv 1 CntriFurnace unit s AFUE 78 0 lv Cooling Ei Unique Cooling Unit Types Cooling Unit Cooling Min S Count 1 Vv 1 SplitAirCond unit s 13 0 SEER 11 3 EER 350 0 CFM ton lv Distribution Attic Default El Fan HVAC Fan 1 El Cooling Went Fixed Flow S Fixed Flow 1 050 CFM Watts CFM 0 58 WICFM 8 1 1 3 Unique Heating Unit Types Indicate the number of unique system types Not the same as count which is the number of identical systems When modeling multiple efficiencies in a single zone the worst case efficiency is assumed in the compliance analysis 8 1 1 4 Heating Unit Name of the heating syst
43. proposed design values in site energy and kTDV values which are reported on the CF1R The detailed breakdown of lighting appliance plug loads and exterior lighting are also show which are summarized on the CF1R Figure 2 4 Energy Use Detail Results Energy Use Details Summary CAHP Standard Standard Standard Proposed Proposed Proposed Compliance Design Design Design Design Design Design Margin End Use Site kWh Site therms kKTDV ft yr Site kWh Site therms kTDW ft yn KTDY R yr Space Heating 2 438 20 63 2 584 21 89 1 26 Space Cooling 431 14 72 335 11 32 3 40 IAQ Ventilation 112 1 13 DIS 113 0 00 Other HVAC 0 00 0 00 0 00 Water Heating 174 2 13 36 174 2 13 36 0 00 PYV Credit 0 00 0 00 Compliance Total 49 84 47 70 2 14 Inside Lighting 1 045 11 16 1 045 11 16 Result Appl amp Cooking 958 52 5 13 80 958 525 13 80 PASS Plug Loads 2 206 22 73 2 206 22 73 Exterior 117 1 16 117 1 16 TOTAL 7 307 226 7 98 69 7 356 226 7 96 55 2 9 2 Summary To view only the total compliance results versus the individual heating cooling water heating results pick the summary tab CBECC Res User Manual Getting Started Figure 2 5 Summary Results Energy Use Details Summary CAHP Compliance Compliance Total Margin KTDR yr kTD VA yr Standard Design 49 84 Proposed Design 47 70 2 14 2 93 CAHP The results of the CAHP or other incentive program analysis can either be viewed on screen or generated in a CAHP In
44. req d Compact Distribution System CBECC Res User Manual Domestic Hot Water Table 9 1 Water Heater Distribution System Multipliers Distribution System DEE NO HERS INSPECTION REQUIRED Standard 1 00 Pipe Insulation All Lines 0 90 Parallel Piping 1 05 Recirculation Non demand Control no control runs 24 hrs day 9 00 Recirculation Manual Demand Control Push Button 1 60 Recirculation Demand Control Occupancy Motion 2 40 OPTIONAL CASES HERS INSPECTION REQUIRED Pipe Insulation All Lines 0 80 Parallel Piping 0 95 Compact Design 0 70 Point of Use 0 30 Recirculation Demand Control Push Button 1 45 Recirculation Demand Control Occupancy Motion 2 20 Non Compliant Installation Distribution Multiplier 1 20 9 3 2 Multi Family Distribution Type When central water heating is used in a multi family building the options for the distribution system within the dwelling unit are limited to e Standard e Pipe Insulation All Lines e Pipe Insulation All Lines HERS verification The distribution types available for the central system are e No control e Demand control e Temperature modulation e Temperature modulation and monitoring e No control HERS verification e Demand control HERS verification e Temperature modulation HERS verification e Temperature modulation and monitoring HERS verification More information about distribution types can be found in
45. requirement for solar reflectance and emittance that varies by climate zone and roof slope A low slope roof has a ratio of rise to run or pitch of 2 in 12 or less lt 9 5 degrees from the horizontal In climate zones 13 and 15 a low slope roof is compared to a roof with 0 63 aged solar reflectance and 0 85 emittance A steep slope roof has a ratio of rise to run of greater than 2 12 gt 9 5 degrees from the horizontal In climate zones 10 through 15 a steep slope roof is compared to a roof with 0 20 aged solar reflectance and 0 85 emittance The CFIR reflects that a cool roof is modeled when a reflectance of 0 20 or greater is modeled If a reflectance value greater than 0 10 but less than 0 20 is modeled the CF1R reflects a special features message that the building contains a non standard roof reflectance 5 3 4 Low Slope Aggregate Roof Although more common in nonresidential applications aggregate is a roofing product made up of stone or gravel material that is used as a finish surface for low sloped roofing A compliance option see Publication CEC 400 2012 018 SF allows for default efficiencies when the material is tested to the initial solar reflectance value shown in Table 5 1 The compliance option allows compliance using the default values for aged solar reflectance and emittance values shown in the table Table 5 1 Solar Reflectance and Emittance for Aggregate Materials Tested Initial Solar Default Aged Solar Aggrega
46. serving the dwelling unit based on the building and water heater type being specified see Sections 9 3 2 An input for the recirculation loops is also required see Figure 9 2 9 4 1 4 Recirculation Pump Power bhp Multi family recirculation pump power brakehorse power Typical value is less than 1 00 9 4 1 5 Efficiency fraction Multi family recirculation motor efficiency fraction Typical value is less than 1 00 See Table 9 2 for default efficiencies 9 4 1 6 Water Heater s The name of the water heater which holds more information about the water heater see Section 5 1 1 11 9 4 1 7 Count The number of water heaters named in the adjacent field that are in the system Include different water heaters or different water heater efficiencies on a different line 9 4 CBECC Res User Manual Domestic Hot Water Table 9 2 Default Recirculating Pump Motor Efficiency Nameplate or Brake Horsepower Standard Fan Motor Efficiency 0 050 1 20 0 40 0 083 1 12 0 49 0 125 1 8 0 55 0 167 1 6 0 60 0 250 1 4 0 64 0 333 1 3 0 66 0 500 1 2 0 70 0 750 3 4 0 72 Source Reference Appendices Nonresidential Appendix NA3 Figure 9 2 Recirculation Loops Water Heating System Data Solar Water Heating Data Recirculation Loops Currently Active DHW System DHW System 1 z M Use Default recirculation loops Extra pipe insulation 9 5 Solar Water Heating Data When a water
47. system name Keep the Distribution as Standard Pick from the drop down menu for Water Heater s 1 create new Water Heater and keep the default name Click lt OK gt to accept the default characteristics for the water heating system Click lt OK gt We will keep the water heater count as 1 Click lt OK gt again to accept the building details for floor area stories HVAC and DHW systems NOTE In this tutorial we often accept the default names You may wish to name your components 14 15 16 something more descriptive since you will likely use a previous project to begin a new project and the names will help you identify the characteristics of that component Next we will add components from the top down beginning with a 600 square foot ceiling Right click on the House zone and choose lt create gt and then Ceiling below attic Accept the default name and click lt OK gt Then follow the prompts to create a 600 square feet and create a new construction assembly Set the cavity insulation to R 38 ceiling below attic Click lt OK gt three times Notice that in addition to the ceiling the program has created an attic zone with 600 square feet Next add exterior walls a Right click on the House zone again Choose lt create gt and then pick lt exterior wall gt Change the Exterior Wall Name to Front Wall and click lt OK gt b Enter a gross area of 240 square feet of wall area and for the constr
48. tag or ID use that for the name Each name within a zone or on a surface must be unique 7 6 1 2 Belongs to Zone The name of the zone in which the below grade slab is being modeled 7 6 1 3 Slab Floor Status Select New Existing or Altered 7 6 1 4 Floor Area Area in square feet measured from the outside of the exterior surface of the zone 7 6 1 5 Depth Below Grade This is the depth of the floor below grade positive number in feet With the exception that this value is expressed as a positive number this value should match the value for the zone bottom see Section 5 1 1 8 7 7 Windows The 2013 Standards establish a maximum weighted average U factor of 0 58 Section 150 0 q for fenestration including skylights The exception allows the greatest of 10 ft or 0 5 percent of the conditioned floor area to exceed the maximum 0 58 U factor Create a library of window types using either default values or product specific values for U factor and SHGCs see Section 6 12 Since you must model each window individually this gives you the greatest flexibility by allowing you to update the window efficiencies with the least amount of effort When you create a new window type even if you wish to keep the default values be sure to retype them so the values on the window type screen are red Then when you pick the window type the window data screen picks up the values in blue from the window type fields 7 14 CBECC Res User Manual B
49. tank type from one of the listed sources in Section 9 1 9 6 1 9 Ambient Conditions For an indirect water heater specify whether it is installed in unconditioned or conditioned space 9 6 1 10 Recovery Efficiency If the equipment is part of a hydronic system enter the recovery efficiency thermal efficiency or AFUE for appropriate water heating type The value comes from one of the listed sources in Section 9 1 and is entered as a percent e g 78 80 9 7 Hydronic and Combined Hydronic A hydronic system uses a device such as a boiler or tankless water heater to provide space heating or in a combined hydronic system to provide both space heating and water heating For the heating system inputs see Section 8 2 6 See Figure 9 7 for the water heating definition of a combined 9 8 CBECC Res User Manual Domestic Hot Water hydronic system To receive the full credit for the water heating part of a hydronic system rather than leaving the water heating field as none list the same device that is providing the space heating see Figure 9 7 Figure 9 7 Combined Hydronic Water Heating System Data Solar Water Heating Data Recirculation Loops Currently Active DHW System Comb Hydronic x System Name Comb Hydronic Dwelling Unit Distribution Standard gt Count Water Heater s 1 Lrg 100 Gal El 1 2 j none Ei 9 7 1 1 Water Heating Combined Hydronic To receive the full credit
50. the zone or dwelling unit 5 2 1 2 Dwelling Unit Type Indicate which dwelling unit type contains the appliance data HVAC water heating and indoor air quality IAQ information for these dwelling units 5 3 CBECC Res User Manual Zones 5 2 1 3 Count This input is to specify how many of this dwelling unit type are included in this zone If multiple dwelling units are included this number is limited to one floor In the above figure the bottom floor has 780 x 4 3120 ft 5 2 1 4 Conditioned Area This data is captured from the dwelling unit type 5 2 1 5 Washer Zone This data is based on the input from the dwelling unit type indicating that this appliance is contained within the floor area of the dwelling unit 5 2 1 6 Dryer Zone This data is based on the input from the dwelling unit type indicating that this appliance is contained within the floor area of the dwelling unit 5 3 Attic The attic zone is where the roofing material tile asphalt shingles radiant barrier above and below deck insulation as defined in the specified construction as well as roofing characteristics i e default or cool roof are assigned The compliance software models attics up to two as a separate thermal zone and includes the interaction with the air distribution ducts infiltration exchange between the attic and the house the solar gains on the roof deck and other factors These interactions are illustrated in Figure 5 3 5 3 1 Attic Z
51. to edit R to rename b When the bottommost Create item is selected right left arrow keys to open close submenu of children to create c lt esc gt key to close right mouse menu 4 Left right arrows when on an object with children i e a wall with windows left arrow contract and right arrow expands to show hide the child objects 2 8 Defining New Components From the main program screen or at any point where you would like to create a component under a child to the parent component 2 7 CBECC Res User Manual Getting Started e Right click on the component to which you want to add the new component e Select Create then select the type of object you want to create Only applicable component types will appear on the list When starting with a new project the only option is to create the project Once that is defined the components available will depend on where the cursor is placed For example a skylight can only be created under a cathedral roof e Accept the defaults or edit the name parent and existing component from which to copy and click OK e Edit the input fields with white backgrounds to describe the new component and click OK 2 9 Analysis Results Once an input file is created and the analysis performed tools perform analysis the results can be viewed in several formats as shown below 2 9 1 Energy Use Details This is the typical results screen showing the detailed standard design and
52. to meet the minimum CFM required to meet the mandatory ventilation requirements found under Building in Section 4 5 8 27 CBECC Res User Manual Mechanical Systems 8 6 1 3 W CFM IAQ Vent The default value is 0 25 W CFM The standard design is set to the same value as proposed up to 1 2 W CFM 8 6 1 4 IAQ Fan Type Select exhaust supply or balanced both exhaust and supply 8 6 1 5 IAQ Recovery Effectiveness When the fan type is balanced enter the IAQ Recovery Effectiveness 8 7 Cooling Ventilation Although not a mandatory requirement a whole house fan one type of cooling ventilation is included in the standard design building in climate zones 8 14 CBECC Res can model system types shown in Table 4 2 Inputs associated with each type are shown below Ventilation cooling systems bring in outside air to cool the house when this can reduce cooling loads and save cooling energy Whole house fans involve window operation and attic venting Central fan integrated CFI systems use the HVAC duct system to distribute ventilation air Any ventilation cooling system that exhausts air through the attic requires a minimum of 1 ft of free attic ventilation area per 375 CFM of rated capacity for relief based on Section 150 1 c 12 of the Standards The amount of attic venting is not a user input 8 7 1 Whole House Fan If a default prescriptive whole house fan was specified see Section 4 8 there is no need to provide details ab
53. to the exterior Keep the surface set to default 80 covered 20 exposed 3 5 CBECC Res User Manual Tutorial 26 The model is now complete You can edit envelope components by right clicking on them and choosing lt edit gt You can add components by right clicking on a parent component and choosing lt create gt and then clicking on a component type By choosing the Mechanical tab at the main screen you can similarly edit components of the mechanical systems 27 To perform an analysis save your input file using the Save shortcut key and the Perform Analysis shortcut key see page 2 4 also accessible under the menu for Tools This will perform the simulation of the current model which takes from 3 5 minutes For comparison Figure 3 2 shows the output screen for the model built in this tutorial You will be able to view the CF1R since we checked the box to create the PDF The PDF is generated using a web based application Figure 3 2 Output for Simple House in Climate Zone 12 Energy Use Details Summary CAHP Standard Standard Standard Proposed Proposed Proposed Compliance Design Design Design Design Design Design Margin End Use Site kWh Site therms kTDW A2 yr Site kWh Site therms kTDW2 yr KTDW A2 yr Space Heating 54 62 7 20 75 58 68 1 22 47 1 72 Space Cooling 374 37 41 321 33 23 4 18 AQ Ventilation 62 2 21 62 2 21 0 00 Other HVAC 0 00 0 00 0 00 Water Heating 135 6 36 40 135 6 36 40 0 00 PY Credit 0
54. verified system airflow using diagnostic testing procedures from Reference Appendices Residential Appendix RA3 8 2 2 9 AC Charge Verified refrigerant charge Select Not Verified Verified or Charge Indicator Display CID There is no mandatory requirement for verified refrigerant charge however the standard design in climate zones 2 and 8 15 includes proper refrigerant charge in the standard design for most equipment types see Standards Section 150 1 c 8 8 2 2 10 Refrigerant Type Default R410A assumed for all refrigerant containing equipment 8 2 2 11 Multi Speed Compressor Use this field to indicate if the cooling system is a zonally controlled multi speed compressor An exception for single speed compressors would leave this box unchecked and specify 150 CEM ton see Section 8 3 1 5 8 8 CBECC Res User Manual Mechanical Systems Figure 8 6 Heat Pump Data Heat Pump Data Currently Active Heating System Heat Pump System yl Name Heat Pump System Type SplitHeatPump Heating side of central split heat pump y SplitHeatPump Heating side of central split system heat pump heating systems Distribution system shall be one of the ducted systems Efficiency Metric HSPF Heating Performance Cooling Performance HSPF 7 700 ratio SEER 13 0 kBturhy kw Capacity Btuh COP ratio EER 11 3 kBtuh kW eme 36000 CFM per Ton 350 CFM ton AC Charge Verified pi 17 F 24700 Refriger
55. whether natural gas is available at the site as identified under the building tab For multi family buildings this information is provided as part of the dwelling unit type see Section 5 6 1 4 4 8 CBECC Res User Manual Project 4 7 IAQ Ventilation For single family dwelling units the mandatory indoor air quality IAQ ventilation is specified here The minimum required ventilation rate is displayed based on the conditioned floor area and number of bedrooms in the dwelling unit See Section 8 6 for more information on the specific IAQ fan details For more information on this mandatory requirement see Residential Compliance Manual Section 4 6 For multi family dwelling units see Section 5 6 1 6 4 7 1 1 Model as Select method of ventilation as either default minimum IAQ fan or specify individual fans as described in Section 8 6 4 7 1 2 Zone Assign to one of the conditioned zones 4 8 Cooling Ventilation Figure 4 4 Cooling Ventilation Project Analysis Building Dwelling Units Lighting Appliances IAQ Cool Vent Cooling Ventilation Default Prescriptive Whole Hor y Cooling Ventilation 4 200 CFM 2 00 CFM A2 Zone Conditioned x Cooling ventilation systems use fans to bring in outside air to cool the house when this could reduce cooling loads and save energy The simplest approach is a whole house fan which is the basis of the standard design in climate zones 8 14 where the evening
56. wood siding sheathing decking 6 10 6 Demising and Interior Walls Walls separating conditioned space from unconditioned space e g from house to garage knee walls are modeled in the conditioned space as interior although actually demising walls In creating the building envelope the wall will have conditioned space on one side and unconditioned space or zone on the other side 6 14 CBECC Res User Manual Construction Assemblies When defining multi family buildings party walls separating zones are defined as part of both zones in which they occur The box indicating that there is a dwelling unit on the other side is checked When the wall is an interior or demising wall both the inside and outside surfaces are gypsum board and there will be no solar gains on the unconditioned side Knee walls are insulated as a wall Figure 6 8 Interior Walls Construction Data Currently Active Construction Interior Wall Cons Construction Name Interior Wall Cons Can Assign To Interior Walls Z Construction Type wood Framed Wall y Construction Layers inside to outside Cavity Path Frame Path Inside Finish Gypsum Board zl Gypsum Boara gt Sheathing Insulation no sheathing insul y no sheathing insul y Cavity Frame rra y D n DC y Sheathing Insulation no sheathing insul no sheathing insul Other Side Finish Gypsum Board gt Gypsum Board 6 10 7 Garage Exterio
57. 03 June 2013 contains the rules that the software follows to establish the standard and proposed designs for a proposed building These documents can be downloaded from the Energy Commission website www energy ca gov title24 or purchased from California Energy Commission Publications Office 1516 9th Street Sacramento CA 95814 916 654 5200 1 14 Terminology 1 14 1 Compliance Manager The compliance manager is the simulation and compliance rule implementation software specified by the Energy Commission also known as the public domain compliance software It is named 1 6 CBECC Res User Manual Overview CBECC Res and it models the features of the building as specified in the Standards Section 150 1 c and Table 150 1 A Package A to establish the energy budget for the building 1 14 2 Report Manager The report manager is a web based application used to generate the Certificate of Compliance CF1R 1 14 3 Proposed Design The user defined proposed building modeled in CBECC Res is called the proposed design The proposed design is compared to the standard design to determine if the building complies with the Standards The standard design minus proposed design must have an overall zero or positive margin to comply although individual features for example space cooling may be negative The building configuration is defined by the user through entries for floors walls roofs and ceilings windows and doors The ar
58. 1 7 ft 7 4 1 1 Exterior Floor Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 7 4 1 2 Belongs to Zone Select any appropriate zone already included in the building model When copying components of one zone to another this field automatically changes 7 4 1 3 Surface Status Select New Existing or Altered 7 4 1 4 Construction Raised floor over crawl space exterior floor or interior floor If an appropriate construction assembly is not available right click and pick lt create gt discussed in depth in Chapter 6 Construction Assemblies 7 4 1 5 Floor Area Area of the floor in square feet 7 4 1 6 Floor Elevation Height above grade or the depth of crawl space in feet This value must be consistent with the zone information If the crawlspace height is 2 feet this value is also 2 If this is a second floor and the zone identifies the bottom of the zone as 2 with a floor to floor height of 10 this value is 12 7 4 2 Interior Floor Floor Over Garage A raised floor over a garage or over another conditioned space is modeled as an interior floor but with either the garage or another zone on the other side 7 10 CBECC Res User Manual Building Envelope Figure 7 11 Garage or Interior Floor Interior Floor Data Currently Active Floor FloorOverGarage Interior Floor Name FloorOverGarage
59. 107 SSES Other HVAC 0 00 0 00 Inside Lighting Water Heating 10 81 6 58 E Appl amp Cooking inside Lighting 10 23 10 23 Plug Loads Appl amp Cooking 11 41 HE Plug Loads 20 15 20 15 am Exterior Exterior 119 1 19 Compliance Total 84 02 35 71 TOTAL 107 00 78 69 Name of Model File 2 Story 2 Zone Rev 16 Date and Time of Analysis 15 18 Thu Nov 06 2014 Pacific Gas and mu Ca GE el D Electric Company EDISON Ar ES n Sempra Energy wm DE sempra Energy wm 4 11 CBECC Res User Manual Zones Chapter 5 Zones 5 1 Conditioned Zones Decide in advance how many zones are needed to adequately define a building A zone is typically an area with specific details that must be modeled separately from another area a more complex building model does not necessarily yield better compliance results Some cases where multiple zones are required are e Zonal control with at least one living and one sleeping zone e Spaces served by different types of heating cooling equipment such as a heat pump and a gas furnace e Different duct conditions or locations NOTE Different types of water heating can be modeled within the same zone The simplest approach is to model the worst case in a single zone In addition to the conditioned zones attics crawl spaces and garages attached unconditioned spaces must be modeled Attached unconditioned spaces should be modeled using the attached garage option named as appropriate T
60. 2 No Cooling When no cooling system is installed in a dwelling create a cooling system using the system type NoCooling see Figure 8 12 The distribution system is the same as the heating system if any If the heating system has no ducts set the distribution to none The fan system can also be set to none 8 18 CBECC Res User Manual Mechanical Systems Figure 8 12 No Cooling System Cooling System Data Currently Active Cooling System No Cool ha Name No Cool Type NoCooling No cooling equipment gt SEER kBtu h kWv EER kBtuh kvy M Use this EER in compliance analysis CFM per Ton CFM ton AC Charge Not Verified z Refrigerant Type R4104 z Sizing Factor 1 1 ratio 8 3 3 Zonal Cooling CBECC can model zonally controlled cooling equipment different than the compliance option that involves living and sleeping zones Some of the choices with this modeling option include the ability to specify if the equipment is a single speed or multi speed compressor A single speed compressor with a bypass duct has an exception that allows modeling a cooling airflow as low as 150 CFM ton an energy penalty It is important to know the details of the system because in some cases it may not be possible to meet 350 CFM ton when in zonal mode See Sections 8 3 1 5 8 3 1 8 and 8 3 1 9 Specify a bypass duct as shown in Section 8 4 1 6 See also Reference Appendices Residential Appendix RA3 1 4 6 Cooling System Data
61. 3 2 Multiple attics for modeling existing plus addition with a radiant barrier in the addition only 3 Modeling of room air conditioners and room heat pumps is enabled 4 Wall furnaces gravity or fan type floor furnaces and room heaters which were previously all lumped into one category of heater are now specifically identified 5 None will no longer be an acceptable way to define a building with no cooling system installed see Section 8 3 2 for the correct modeling method and 6 Existing HVAC equipment in an addition alone see Section 10 1 New program features on the tools menu allow many options from inside the program 1 View Title 24 compliance report 1 2 CBECC Res User Manual Overview 2 View project folder to find a CF1R or XML file 3 View project log file not new but worth reminding that this is where you may find a clue as to the source of program errors and 4 Generate CAHP CMFNH report This generates a report of the California Advanced Homes Program CAHP Single Family California Advanced Homes Program MultiFamily PG amp E California Multifamily New Homes see Section 4 9 For a full list and description of the tools menu options see Section 2 3 5 New reporting features 1 Summary of HERS features on page 2 of the CF1R 2 CAHP CMENH incentive calculations for single or multi family utility programs report see Section 4 9 1 6 CF1R and Watermarks The only document pr
62. 4 Leakage rs Age 8 22 Type and Jocapon 8 22 Duplicar rd laa 4 7 Dwelling umit oersnisirisiiei snoite 5 3 5 10 Multi family ENEE 5 10 EER verified en 4 1 8 8 8 18 Electric Obra tte 8 15 EMUSSIVILY eiii ainas See Emittance Emittance default 5 6 7 4 Energy use results 2 8 EOS ita 2 9 EOJ t ai na iba 2 3 Evaporative cooltmg 8 20 Evaporatively cooled condenser 8 20 Example Mlese Arse meer hrinn ir EEs 2 1 Fan efficacy Mandatory reguirement 8 27 Federal appliance standard ue 4 4 Femestration stinnir R 7 15 iii FS A 7 17 Files Blank proiect en en a 4 1 Example input files ccccsesseeeeneeseseeees 4 1 Floor Mandatory insulation o oococoomonmmmmmmmm 6 2 Ree 7 9 OVET garage 6 17 E WEE 6 16 Floor elevatpon 5 2 7 10 7 12 Floor fULMACE occicicocononononanannnnononaninnnnanonnnnononananos 8 15 Eloorto Hor ida 5 2 Frequently Asked Questions sssssssesseseese1 2 4 Front Orientation ooccccoconoconnnnnonnnnnnaninnnrarannnnaranoos 4 7 Garage oe a ceseceats assess eine ee tenses 4 8 5 1 Multifamily eerie airepean iat 5 9 LADO iii 5 8 Garage dote oiriin ro ie Tiits ela Ean eas 7 9 Geothermal heat pump cece eee 8 11 Ground source heat pump 0 8 11 Water heating inputs ccc eects 9 10 Heat pump Air to water Source occccnoocnnccoooncnoconanonnnns 8 7 8 10 A eeneg deed eer 8 7 Ground source 8 1 8 7 8 11 CBECC Res User Manual Mini split inputs sesiis 8 11 Heat pump equipment
63. ATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 8 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd HVAC COOLING SYSTEMS ot fte ES Mer E 06 di EEN Efficiency Multi speed System Type EER Zonally Controlled Compressor HERS Verification HVAC COOLING HERS VERIFICATION 01 O ge ea DO 4 Verified Refrigerant Verified Airflow Airflow Target Verified EER Verified SEER Charge No Cool hers cool Not Required hia QR Not Required Not Required Not Required HVAC DISTRIBUTION SYSTEMS ot pa E AE al RS A A Supply Duct Type Duct Leakage Insulation R value Location Bypass Duct HERS Verification Attic Default Ducts located in attic Sealed and tested po 6 Joo age we None Attic Default hers dist HWACDISTRIGUION HERSVERICATON CC PN o o o Le Duct Leakage Duct Leakage Verified Duct Verified Duct Design Buried Deeply Buried Low leakage Verification Target Location Return Supply HVAC FAN SYSTEMS HVAC Fan 1 Single Speed PSC Furnace Fan HVAC Fan 1 hers fan HVAC FAN SYSTEMS HERS VERIFICATION NN UN AO VE EE Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CER
64. CBECC Res User Manual Additions and Alterations Surfaces in the new zone are always new if the surface previously existed it is still considered new if it is in the new zone NOTE If creating a new project rather than using an existing or example file pay close attention to the status as the default status is always new even when adding surfaces to the existing zone This can negatively impact your compliance results Check the CF1R for accuracy with regard to the status 10 2 3 Space Conditioning Status In an existing zone the space conditioning status should not be new It is either existing or altered Existing is the correct status for space conditioning equipment in the existing or new zone if it will not be changed Altered is the correct status for space conditioning equipment that is replaced or changed If the same equipment will condition the existing and new zones the HVAC system status is set to Altered in the existing and new zones New is different than altered and applies only to new zones with equipment that serves only the new zone New means equipment that did not previously exist NOTES 1 Because the status of an HVAC system cannot be changed once it is created begin at the Zone Data tab see Figure 10 3 select the appropriate status and if necessary define the system 2 Check the status of the ducts to be sure it is set correctly Figure 10 3 EAA HVAC System Status Zone Data
65. CC Res User Manual Mechanical Systems Table 8 2 Heat Pump Equipment Split Heat Pump Split heat pump heating system that has one or more outdoor units supply heat to each habitable space in the dwelling unit Distribution is ducted Efficiency metric HSPF Ductless Heat Pump One or more heat pump outdoor units that use refrigerant to transport heat to at least one terminal in each habitable space in the dwelling unit These include small ductless mini split and multiple split heat pumps and packaged terminal commonly called through the wall units Distribution is non ducted Efficiency metric HSPF COP Package Heat Pump Central packaged heat pump systems Central packaged heat pumps are heat pumps in which the blower coils and compressor are contained in a single package powered by single phase electric current air cooled rated below 65 000 Btuh Distribution system is ducted Efficiency metric HSPF Large Package Heat Pump Not enabled Large packaged units rated at or above 65 000 Btu hr heating mode Distribution system is ducted Efficiency metric COP Room Heat Pump A factory encased heat pump that is designed as a unit for mounting in a window through a wall or as a console Distribution is non ducted Efficiency Metric EER Air to Water Heat Pump An indoor conditioning coil a compressor and a refrigerant to water heat exchanger that provides heating and cooling functions Also able to hea
66. CH50 the CF1R reports CFM50 Default value no blower door test for single family buildings with space conditioning ducts in unconditioned space and the default condition for no cooling is 5 ACH50 When there are no heating and or cooling system ducts in unconditioned space the default is 4 4 for single family buildings and townhomes If a single family or town home will have HERS verified infiltration testing blower door test model an achievable target leakage area value For multi family buildings there is no compliance option for infiltration testing The default value that is assumed by CBECC Res is 7 ACH This input represents the air flow through a blower door at 50 pascals Pa of pressure measured in cubic feet per minute called CFM50 or ACH50 CFM50 x 60 minutes divided by the volume of conditioned space is the air changes per hour at 50 Pa called ACH50 When a value lower than default is modeled diagnostic testing for reduced infiltration with the details and target values modeled is reported as a HERS Required Verification on the CF1R 4 6 CBECC Res User Manual Project 4 5 1 4 Insulation Construction Quality Valid options are standard and improved Default value is standard Improved means verified high quality insulation installation certified by the installer and field verified to comply with RA3 5 is modeled for compliance credit Also called Quality Insulation Installation QI improved requires HERS verification
67. COONS aiii nia 8 19 Cresta 5 1 Multi speed compressor comconcnconononononrarananos 8 18 Zonal heating control ococniconinininnnorcrmrmo 8 4 viii Zone status fields Zone type Conditioned Living or sleeping CBECC Res User Manual Appendix A Resolution approving CBECC Res Appendix A Resolution approving CBECC Res A 1 STATE OF CALIFORNIA THE RESOURGES AGENCY EDMUND G BROWN Governor CALIFORNIA ENERGY COMMISSION 1516 Ninth Street MS 45 Sacramento California 95814 Main website www energy ca gov 2013 Building Energy Efficiency Standards California Code of Regulations Title 24 Docket No 12 BSTD 01 Parts 1 and 6 Resolution No 14 1223 APPROVAL BY THE EXECUTIVE DIRECTOR OF THE PUBLIC DOMAIN CALIFORNIA BUILDING ENERGY CODE COMPLIANCE CBECC RES VERSION 3b1 RESIDENTIAL COMPLIANCE SOFTWARE The Executive Director hereby approves CBECC Res Version 3b1 as the public domain alternative calculation method for demonstrating performance compliance with the residential provisions of the 2013 Building Energy Efficiency Standards California Code of Regulations Title 24 Part 6 and associated administrative regulations in Part 1 Chapter 10 Standards The Warren Alquist State Energy Resources Conservation and Development Act Public Resources Code sections 25000 et seq 25402 1 subd b requires the Energy Commission to among other things establish a process for certifying cal
68. California Energy Commission STAFF REPORT CBECC Res USER MANUAL FOR CALIFORNIA BUILDING ENERGY CODE COMPLIANCE CBECC RES PUBLIC DOMAIN SOFTWARE Computer Performance Compliance with the 2013 California Building Energy Efficiency Standards DECEMBER 2014 CALIFORNIA ENERGY COMMISSION Dee Anne Ross Primary Author Martha Brook Project Manager Eurlyne Geisler Office Manager Building Standards Office David Ashuckian Deputy Director Efficiency Division Robert P Oglesby Executive Director ACKNOWLEDGMENTS The Building Energy Efficiency Standards Standards were first adopted and put into effect in 1978 and have been updated periodically in the intervening years The Standards are a unique California asset and have benefitted from the conscientious involvement and enduring commitment to the public good of many persons and organizations along the way The 2013 Standards development and adoption process continued that long standing practice of maintaining the Standards with technical rigor challenging but achievable design and construction practices public engagement and full consideration of the views of stakeholders The revisions in the 2013 Standards were conceptualized evaluated and justified through the excellent work of Energy Commission staff and consultants This document was created with the assistance of Energy Commission staff including Martha Brook PE Todd Ferris Jeff Miller PE Dee Anne Ross and Danny Ta
69. Ceiling Below Attic Assembly Construction Data Currently Active Construction R38 Ceiling below attic ad Construction Name R38 Ceiling below attic Can Assign To Ceilings below attic X e Construction Type Wood Framed Ceiling Construction Layers topmost to bottam Cavity Path Frame Path Attic Floor no attic floor no attic floor Cavity Frame R 38 2x4 Bottom Chord of Truss 24 i Sheathing Insulation no sheathing insul no sheathing insul Le Le Le La Le Le Le La Inside Finish Gypsum Board Gypsum Board I Non Standard Spray Foam in Cavity J Raised Heel Truss Winter Design U value 0 025 Btush ft2 F 6 8 2 Ceiling Construction Layers 6 8 2 1 Attic Floor The available types include no attic floor and wood siding sheathing decking 6 8 2 2 Cavity Frame List the compressed R value of cavity insulation see Section 6 1 in the cavity column In the framing column select the size of the framing and the spacing such as 2x12 with 24 inch on center framing or 2x4 roof truss at 24 inches on center 6 8 2 3 Sheathing Insulation List the sheathing or insulation layer Options are none gypsum board wood sheathing and R1 to R60 insulation 6 8 2 4 Inside Finish This is the inside finish if any of the attic space A layer of gypsum is typical 6 8 2 5 Non Standard Spray Foam in Cavity This check box identifies additional
70. Credit for verified quality insulation installation is applicable to all insulated assemblies in a newly constructed building or the entire building of an existing plus addition analysis ceilings attics knee walls exterior walls and exterior floors See Reference Appendices Residential Appendix RA3 5 4 5 1 5 Front Orientation This field defines the front orientation in degrees and must be accurate within 5 degrees This value is from the site plan While this input is typically the side of the building where the front door is located if the front door front fa ade or the side of the building facing the street are different any choice is acceptable as long as the end result is a CF1R with windows facing the correct actual azimuth The front orientation or actual azimuth is used to establish the orientation of walls and windows which are modeled using either labels such as front or left or the orientation with respect to the front and not the actual orientation see Orientation in Section 7 1 Multiple orientation or cardinal compliance is a valid selection for subdivisions where homes may be built in any orientation The building must comply with the same energy features in all orientations A single CF1R will display the compliance results for the four cardinal orientations north east south and west 4 5 1 6 Single Family or Multi family Use the check box to indicate if the building is a single family dwelling R 3
71. DV energy For spaces with electric resistance heat in addition to another heating system the electric resistance heat is the system that must be modeled 8 1 3 Zonal Control With zonal control the sleeping and living areas are modeled separately for space conditioning To model zonal control credit the first step is to specify that the building will have zonal control on the Building tab Figure 8 3 Once this is specified the zone type can be set to Living or Sleeping see Figure 8 4 which changes the setback thermostat settings for the heating system Zonal control credit is not a HERS verified credit Zonal control credit is not available if space heating is provided by a heat pump or combined hydronic system For information on zonal cooling multi speed compressors when it is acceptable to model a lower target CFM ton and the presence of a bypass duct see Zonal Cooling Section 8 3 3 Figure 8 3 Zonal Control from Section 4 5 1 9 Project Analysis Building Dwelling Units Lighting Appliances IAQ Cool vent Building Description 2700 t2 CEC Prototype Existing Condition Verified No Y Air Leakage 50 ACH 50Pa Insul Construction Quality Standard y 8 Front Orientation 29 deg Single Family C Multi family IV Natural Gas is available at the site Number of Bedrooms 4 Je Zonal Control Credit living vs sleeping Iw Has attached garage Figure 8 4 Type from Section 5 1 1
72. E Zero Energy Ready Home single family only CBECC Res User Manual Project Once the input file is run you can either view or print the results The results can be seen on the analysis results screen by selecting the CAHP CMFNH tab see Figure 4 5 To create a printed report select generate CAHP CMFNH report from the tools menu This creates a PDF report showing the incentive amount the CAHP score the savings in kW kWh yr and Therms yr and other energy use see Figure 4 6 Figure 4 6 CAHP Incentive Report C1R Project Size and Location Orientation and Type Conditioned Floor Area 2700 sq ft Project Type Single Family Climate Zone l CZO Burbank Front Orientation in degrees 30 Kicker and Incentive Summan CAHP Score Initial 73 gt DOE Zero Energy Ready Home 5 possible 0 hey Future Code Preparation 5 possible o e Low Energy Use Home 5 possible 5 Di Ultra Low Use Home 5 possible 5 no Total Project TOV Energy 212463 mm CAHP Score Final 63 a Incentive Amount 3600 gt CAHP o Soore ps Project Savings D Energy Source Savings Margin 2 kW 0 226504 a kWhiyr 148 002 Thermsiyr 7445 bh e em Space Heating Energy Use Summary kTDV ft2 En Space Cooling Space Heating 7 59 5 31 IAQ Ventilation Space Cooling 4454 ERR qm Water Heating TAG Ventilation 107
73. Res User Manual Additions and Alterations Figure 10 6 Altered with Verified Existing Conditions Window Data Window Overhang Window Fins Currently Active Window Beart z Window Name Bedr1 Belongs to Exterior Wall Back wan y Surface Status Altered y Iw Verify Existing Window Window Type New Oper o Specification Method Overall Window Area y M Model Window Fins ar erha ALTERED EXISTING Window Area 40 0 f2 Window Area 40 0 f2 NFRC U factor 0 300 Btuh ft2 F NFRC U factor 1 280 Btuh ft2 F Solar Ht Gain Coef 0 180 Solar Ht Gain Coef 0 800 Exterior Shade Insect Screen default D Exterior Shade Insect Screen default v Figure 10 7 Altered Without Verified Existing Conditions Window Data Window Overhang Window Fins Currently Active Window Bedr1 D Window Name Be Belongs to Exterior Wall Back wan y Surface Status Altered y M Verify Existing Window Window Type New Oper Specification Method Overall Window Area y T Model Window Fins and or Window Area 40 0 ft2 NFRC U factor 0 300 Btuh ft2 F Solar Ht Gain Coef 0 180 Exterior Shade Insect Screen default D 10 7 CBECC Res User Manual Additions and Alterations 10 5 1 Radiant Barrier It is now possible to model an addition with a radiant barrier or cool roof even if the existing building does not have that feature When creating the ceiling below attic for the addition create a second atti
74. SHGC values only NOTE even if you wish to accept the default values type the value in so that the field turns red This set up allows you to change only the U factor and SHGC values on a project 3 4 CBECC Res User Manual Tutorial 17 18 19 20 21 22 23 24 25 in the Window Types list without having to go back and edit every window entry see also 6 12 When adding the windows to the given walls the fields will be blue indicating they are connected to the Window Type library correctly Now add the door and windows to the envelope description The door and windows will be child components of the respective walls in which they are located Begin with the front door a Right click on the Front Wall choose lt create gt and then click on lt InputDoor gt b Follow the prompts The door is 20 square feet Use the default U factor 0 50 Return to the main screen Now move back up to the walls right click on the Back Wall to lt create gt a window Name it B1 and click lt OK gt The next dialog box asks you to choose between window dimensions and overall window area Choose window dimension so an overhang can be modeled and click lt OK gt You are now at the Window Data tab Select the Window Type from the library types just added e g Operable and enter the window height 3 and width 3 and set the multiplier to 2 since we will model identical overhangs for the two windows Notic
75. TIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 9 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd P Names VerifiedFanWatt Draw Required Fan Efficiency Watts CFM IAQ Indoor Air Quality FANS AA Recovery IAQ CFM IAQ Watts CFM IAQ Fan Type Effectiveness HERS Verification COOLING VENTILATION Name Cooling Vent CFM Cooling Vent Watts CFM Total Watts Number of Fans Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 10 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd DOCUMENTATION AUTHOR S DECLARATION STATEMENT 1 certify that this Certificate of Compliance documentation is accurate and complete Documentation Author Name Documentation Author Signature Company Signature Date Address CEA HERS Certification Identification If applicable City State Zip RESPONSIBLE PERSON S DECLARATION STATEMENT certify the following under penalty of
76. TS 01 Building Complies with Computer Performance This building incorporates features that require field testing and or verification by a certified HERS rater under the supervision of a CEC approved HERS provider This building incorporates one or more Special Features shown below ENERGY USE SUMMARY pS SS A kTDV ft Design Design Margin Improvement Pa vemos TO Jos Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 2 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd REQUIRED SPECIAL FEATURES The following are features that must be installed as condition for meeting the modeled energy performance for this computer analysis e Cool roof Window overhangs and or fins No cooling system included HERS FEATURE SUMMARY The following is a summary of the features that must be field verified by a certified HERS Rater as a condition for meeting the modeled energy performance for this computer analysis Additional detail is provided in the building components tables below Building level Verifications e IAQ mechanical ventilation Co
77. a aa os da 8 16 8 3 2 INO COOMA as cri Da AA eared naa deities 8 18 8 3 3 Zonal CODINA eae eden Gee teens Atha eee 8 19 8 3 4 Evaporatively Cooled Condenser nnt 8 20 8 3 5 Room Air Conditioners a asera faeces eased vad iii 8 20 8 3 6 Evaporative Cool gsnt iieiea atin Anes Sah SEENEN ANEN EHNEN 8 20 8 4 Distribution System Data 8 21 8 4 2 Low Leakage Air Handlers AAA 8 25 8 4 3 Verified Low Leakage Ducts in Conditioned Space oooocccncicinncicincccnoccnnnccnnnnncccnnnn cnn anna cnn nos 8 26 8 4 4 Buried Re EE 8 26 8 5 FIVAG E EE toda il Ta 8 28 8 6 Indoor Air Quality IAQ Fan Data 8 29 8 7 ele WEE le KEE 8 30 8 7 1 le Ee EI DEE 8 30 8 7 2 GEL WE Me 8 31 8 7 3 GE Variable Speed titi id A EE dee 8 31 Chapter 9 Domestic Hot Water DHW ccccsseceeesseeceeeseeeeenseeeseeensaeseenseaeeeensaeeeensaaeseenseaeeeenneeesenenas 9 1 9 1 Efficiency lite un Le EE 9 1 9 2 Water Heater Types ici apre 9 1 9 3 DIStHOUTION TYPOS era ete a EE 9 2 9 3 1 Single Family Distribution Tvpe 9 2 9 3 2 Multi Family Distribution TYDE cirerer sanitari rnani iepa reha aaa ARa a TE KPEE KARE EVARA AE NSA 9 3 9 4 Water Heating System Data A 9 4 9 5 Solar Water Heating Data 9 5 9 6 Water Heater Data arsine ieie aane e cu dude dd e E dd A id 9 6 9 7 Hydronic and Combined Hydronic cccccccecceeeeeceeceeeeeeeceeeeceaaeseeneeceaeeesaaeeeeaaeseeeeeseaaeeeeaaeeeeeeesees 9 8 9 8 Ground Source Heat Pump and Air to Water Heat PUMP ooooncccinoccconccon
78. a garage is modeled as an interior floor When defining the building envelope the outside surface will be set to garage rather than another conditioned zone By modeling it as an interior floor the ceiling below can be set to gypsum board or be left undefined select inside finish 4 6 17 CBECC Res User Manual Construction Assemblies Figure 6 12 Interior Floor Construction Data Currently Active Construction Garage Floor z Construction Name Garage Floor Can Assign To Interior Floors z Construction Type Wood Framed Floor y Construction Layers topmost to bottom Cavity Path Frame Path Floor Surface Carpeted Carpeted y Concrete Fill L no concrete fill zi no concrete fill y Floor Deck Wood Siding sheathing decking Wood Siding sheathing decking gt Cavity Frame R 19 y 2x12 16 in OC Sheathing Insulation L no sheathing insul Ya no sheathing nsul gt Ceiling Below Finish Gypsum Board y Gypsum Board y M Non Standard Spray Foam in Cavity 6 11 4 Slab and Below Grade Slab There are no construction assemblies for slab and below grade slab floors See Sections 7 5 and 7 6 6 12 Window Types This feature was designed to accommodate the need to easily update window efficiencies should they change after they are input To use it most productively only the efficiencies in the window types library have to be changed to be reflected througho
79. all insulation is either 1 R 13 in a wood framed 2x4 wall or an overall U factor of 0 102 or 2 R 19 in a wood framed 2x6 wall or an overall U factor of 0 074 Under the Help button is a summary of these minimum mandatory requirements which may be particularly helpful if building with steel framed walls These walls require sheathing insulation in order to comply with the mandatory requirement Mass or unframed walls do not have a minimum mandatory insulation requirement 6 4 Spray Foam Insulation SPF The R values for spray applied polyurethane foam insulation differ depending on whether the product is closed cell default R 5 8 inch or open cell default R 3 6 inch When completing a construction assembly for the roof ceiling walls or floor use the values shown in Table 6 2 to determine the default R value for the cavity size Alternatively with HERS verification and additional documentation requirements a higher than default value may be used as indicated by checking the box for non standard spray foam in cavity as part of the construction assembly see Reference Appendices Residential Appendix RA3 5 6 6 2 CBECC Res User Manual Construction Assemblies Table 6 2 Required Thickness Spray Foam Insulation Required R values for SPF insulation R 11 R 13 R 15 R 19 R 21 R 22 R 25 R 30 R 38 Required thickness closed cell R5 8 inch 2 00 2 25 2 75 3 50 3 75 4 00 4 50 5 25 6 75 inches inches inches inches inches i
80. all storage small instantaneous and small heat pump water heaters For large 9 7 CBECC Res User Manual Domestic Hot Water storage large instantaneous large heat pump or boilers the efficiency is thermal efficiency recovery efficiency or AFUE Indirect water heater efficiency is based on the type of device being used to heat the water Value entered as a decimal such as 0 60 or 0 80 9 6 1 5 Standby Loss or Pilot Energy Required input for large storage water heaters and mini tanks For large storage a standby loss of 3 is entered as 0 03 For mini tanks enter the standby loss Watts Find the standby loss by conducting an advanced search in the Energy Commission s appliance efficiency database of water heating equipment see Section 9 1 Some large storage water heaters are not required to report standby loss This value can be calculated using equations from the 2012 Appliance Efficiency Regulations Tables F2 and F3 as follows Standby loss Btu hr rated input 800 110 x volume x 0 5 Convert to Standby Loss Percent as Standby loss Btu hr 8 25 x Volume x 70 There is no source for pilot energy Leave this value as 0 9 6 1 6 Tank Volume Enter the tank volume in gallons The rated input rather than the tank volume is used to determine if a tank type is large or small see Section 9 2 9 6 1 7 Exterior R value For indirect and unfired tanks 9 6 1 8 Input Rating The input rating consistent with the
81. an system names to identify those systems and their associations with the dwelling unit 5 9 CBECC Res User Manual Zones Each dwelling unit type is created based on its characteristics see Figure 5 7 For example 1 bedroom units with 780 ft2 2 bedroom units with 960 ft2 are created defining the HVAC equipment water heating conditions and IAQ ventilation Once created the dwelling unit types are used in defining the zone see Section 5 2 Figure 5 7 Dwelling Unit Type Dwelling Unit Type Data Additional HVAC and DHW Equipment Assignments Currently Active Dwelling Unit Type OneBR gt Name OneBR Appliance Data E usage default 669 kWh yr v 669 bier Conditioned Area 780 f2 v usage from bedrooms unit v 90 kWh yr Number of Bedrooms 1 IV Clothes washer wv Clothes dryer fuel Natural gas gt E fuel Natural gas y HVAC and Water Heating Equipment HVAC System Type Other Heating and Cooling Syste y Distrib Attic El Fan Fan z Heating El Unique Heating Unit Types Fum zl Count 1 1 CntriFurnace unit s AFUE 78 0 Cooling Pa Unique Cooling Unit Types No AC y Count 1 1 NoCooling unit s 0 0 SEER 0 0 EER 0 0 CFM ton Water Heating au Unique DHW Systems DHW System 1 y IAQ Indoor Air Quality Ventilation Model as Default Minimum IAQ Fan Ea Minimurn IAQ Ventilation 38 4 CFM unit 5 6 1 1 Name This is a dist
82. ant R4104 p gt F Multi Speed Compressor 8 2 3 Air to Water Source Heat Pump See Figure 8 7 for air to water source heat pump input screens An example file included with the program 1StoryExample18HVAC ribd contains an air to water source heat pump system If the system provides water heating see Section 9 8 8 2 3 1 Name User defined name for the system 8 2 3 2 Type Heat pump system type see Table 8 2 8 2 3 3 Heating Performance Enter the Coefficient of Performance COP Efficiency information for a specific model number is found by performing an advanced search in the Energy Commission s appliance directories tp www appliances energy ca gov or from the AHRI Certified Products Directory http www ahridirectory org 8 2 3 4 Capacity 47 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org Capacity is used to determine the energy use of the backup electric resistance heat In a multi family building you will indicate the capacity for the defined system and specify the number of units of that given capacity assigned to the zone see Section 8 1 1 5 8 9 CBECC Res User Manual Mechanical Systems 8 2 3 5 Capacity 17 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org 8 2 3 6 EER Cooling equipment Energy Efficiency Ratio EER On the HVAC System Data screen check the box System Heats
83. anual Overview 1 3 Program Updates For software updates and valid version numbers check the link to the project website accessible from www energy ca gov title24 2013standards 2013 computer prog list html NOTE Be sure to check for updates regularly and or get notifications from the Energy Commission because submittals with outdated software will be rejected by the building department Sign up for e mail notifications at http www energy ca gov efficiency listservers html and at the CBECC Res software website Check regularly for Frequently Asked Questions FAQs at the CBECC Res website http www bwilcox com BEES BEES html 1 4 Software Capabilities CBECC Res can model most typical new construction and addition alteration features For a list of capabilities not yet implemented consult the Quick Start Guide Chapter 7 of this User Manual describes features of the opaque envelope and how they are modeled Chapter 8 addresses the same for mechanical systems and water heating systems are in Chapter 9 Chapter 10 discusses addition and alteration modeling More detailed information about how a specific feature affects the standard design energy budget can be found in the 2013 Residential ACM Reference Manual ACM Reference Manual see Section 1 13 1 5 What s New in Version 3b The most recent update to CBECC Res has new modeling capabilities 1 Below grade called underground walls and floors see overview in Section 7
84. aque Surfaces Working from top down add any ceilings below attic as well as any cathedral ceilings followed by walls and floors 7 2 1 Ceiling below attic 7 2 1 1 Ceiling Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 7 2 1 2 Belongs to Zone Select any appropriate zone already included in the building model When copying components of one zone to another this field automatically changes 7 2 1 3 Surface Status The default condition is new for new construction Other options include existing and altered 7 2 CBECC Res User Manual Building Envelope 7 2 1 4 Attic Zone Select any appropriate attic zone or define a new zone A separate attic zone would be needed if any of the characteristics of the attic are different including the roofing material above or below deck insulation or radiant barrier 7 2 1 5 Construction If an appropriate construction assembly is not available right click and pick create discussed in depth in Chapter 6 Construction Assemblies 7 2 1 6 Ceiling Area Area of the ceiling in square feet 7 2 2 Cathedral Ceiling The information needed to define a cathedral ceiling is shown in Figure 7 3 Because the orientation is entered for cathedral ceilings the ceiling will be modeled in multiple entries with a typical cathedral ceiling having two or more parts e g left and right Figure 7 3
85. area and R value Field verification that duct system was installed according to the duct design including location size and length of ducts duct insulation R value and installation of buried ducts For buried ducts this measure also requires improved construction quality or QII and duct sealing Low Leakage Ducts in When space conditioning ducts are located entirely in directly Conditioned Space conditioned space this is verified by diagnostic testing Compliance credit can be taken for verified duct systems with low air leakage to the outside Field Verification for ducts in conditioned space and duct sealing are required Reference Appendices Residential Appendix RA3 1 4 3 8 Low Leakage Air handling Units Compliance credit can be taken for installation of a factory sealed air handling unit tested by the manufacturer and certified to the Commission to have met the requirements for a Low Leakage Air Handling Unit achieved Field verification of the air handler s model number is required Duct sealing is required Return Duct Design Verification to confirm that the return duct design conforms to the criteria given in Table 150 0 C or Table 150 0 D as an alternative to meeting 0 58 W CFM fan efficacy of Section 150 0 m 12 Air Filter Device Design Verification to confirm that the air filter devices conform to the requirements given in Section 150 0 m 12 Bypass Duct Condition Verification to determine if system is zo
86. as basements or underground surfaces In the zone information if there are below grade surfaces determine the depth of the below grade walls and floor and enter the zone bottom as the negative of that number For example if the walls are 6 feet 4 inches below grade the wall and floor depths are 6 33 feet and the zone depth is 6 33 feet 7 6 CBECC Res User Manual Building Envelope Some modeling decisions to consider are that 1 Since the orientation is not an input and it is not possible to have doors or windows you could combine all of the walls into a single input 2 If the ground is sloped use your professional judgment as to how detailed to break out the surfaces You could select an average model all at the lowest level conservative or somewhere in between 3 The zone type uconditioned cannot be modeled If you chose a basement could be modeled in place of a garage rename the attached garage zone 7 3 1 Below Grade Walls Create below grade and slab floors using the right click create underground wall or floor Below grade floors are described in Section 7 6 7 3 1 1 Depth of Bottom of Wall Below Grade Measurement from grade to the bottom surface of the wall entered as a positive number in feet 7 3 1 2 Wall Area Since wall orientation is not an input enter the combined area of walls that share the same characteristics in feet 7 3 1 3 Construction Assembly Pick one of the construction assembl
87. available only when the previous field is set to window dimensions 6 12 1 4 Window Area Typically blank This value can be specified when defining the individual windows in the building 6 12 1 5 NFRC U factor Be sure to type in the value rather than accepting the default U factor from National Fenestration Rating Council NFRC for the window product not the center of glass value www nfrc org Alternatively enter the default value from Standards Section 110 6 Table 110 6 A 6 12 1 6 Solar Heat Gain Coefficient Be sure to type in the value rather than accepting the default Solar Heat Gain Coefficient SHGC from NFRC for the fenestration product www nfrc org Alternatively enter the default value from Standards Section 110 6 Table 110 6 B 6 12 1 7 Source of U factor SHGC The three valid sources are NFRC default or Alternate Default Fenestration Procedure ADFP A rarely used provision in the Standards is for unrated site built fenestration which requires use of Reference Appendix NA6 to calculate both the U factor and SHGC Whichever source is used the Standards require a temporary label on every window See References Appendices CEC 400 20012 005 p NA6 1 through 6 5 for further information and responsibilities associated with this calculation procedure 6 12 1 8 Exterior Shade Default bug screens for windows none for skylights 6 19 CBECC Res User Manual Building Envelope Chapter 7 Building Envelope Once
88. ayers e Inside Finish Gypsum Board Cavity Frame R 15 2x4 Gar House R15 Interior Walls Wood Framed Wall 2x4 16 in O C R15 0 086 Other Side Finish Gypsum Board Cavity Frame no insul 2x4 Roof Deck Wood Siding sheathing decking Tile Gap present Tile RB Roof Attic Roofs Wood Framed Ceiling 2x4 24 in O C none 0 400 Roofing 10 PSF RoofTile Inside Finish Gypsum Board Ceilings below 2x4 Bottom Chord of Truss 24 Cavity Frame R 9 1 2x4 Btm Chrd R38 Ceiling below attic attic Wood Framed Ceiling in O C R 38 0 025 Over Floor Joists R 28 9 insul Inside Finish Gypsum Board Cavity Frame R 15 2x4 R15 R4 Stucco Wall Exterior Walls Wood Framed Wall 2x4 16 in O C R15 0 065 Exterior Finish R4 Synthetic Stucco Floor Surface Carpeted Floors Over Floor Deck Wood Siding sheathing decking R19 2x6 FlrOvrCrawl Crawlspace Wood Framed Floor 2x6 16 in O C R19 0 049 Cavity Frame R 19 2x6 Inside Finish Gypsum Board Insulation Furring R 13 3 5in wd BG 8 in R13 Underground Walls Concrete ICF Brick 0 081 Mass Layer 8 in Concrete Inside Finish Gypsum Board Insulation Furring R 13 3 5in wd Mass Layer 8 in Concrete Mass 8 in R13 Exterior Walls Concrete ICF Brick 0 075 Exterior Finish 3 Coat Stucco SLAB FLOORS ETS AAA PE E Verified Perimeter Carpeted Existing Area ft ft Edge Insul R value Fraction Heated Condition BUILDING ENVELOPE HERS VERIFICATION gg EE A Quality Insulation In
89. c HSPF Heating Performance Cooling Performance HSPF 8 2 ratio SEER 14 Bu Capacity Btuh EER 11 7 kBtuhikW 47 F 36 000 17 F 24 000 8 2 6 Room Air Conditioning Heat Pumps See Figure 8 9 for room heat pump system data input screen 8 2 6 1 Name User defined name for the system 8 2 6 2 Type Select RoomHeatPump as the system type see Table 8 2 8 12 CBECC Res User Manual Mechanical Systems 8 2 6 3 Heating Performance HSPF Convert the COP to an HSPF using Equation 8 1 Find the COP using the model number and performing an advanced search in the Energy Commission s appliance directories http www appliances energy ca gov or from the AHRI Certified Products Directory http www ahridirectory org Equation 8 2 HSPF 3 2 x COP 2 4 8 2 6 4 Capacity 47 Degrees F Required value 8 2 6 5 Capacity 17 Degrees F Required value 8 2 6 6 Cooling Performance SEER Because this equipment uses an EER as its required efficiency enter the same efficiency value for both EER and SEER The SEER is not used to calculate compliance results 8 2 6 7 EER Check the box M Use this EER in compliance analysis and enter the EER for the proposed equipment The default value is 10 EER 8 2 6 8 CFM per Ton The mandatory requirement for cooling airflow applies to ducted systems only 8 2 6 9 AC Charge Select Not Verified for this equipment type Figure 8 9 Room Heat Pu
90. c zone with the appropriate features Figure 10 8 Altered HVAC and DHW Zone Data Currently Active Zone House Name House Type Conditioned S HVAC Sys Status Altered M Verify Existing System Ge wm M Altered HVAC Sys HVAC new ande ar Existing HVAC Sys Old HVAC y Ceiling Height 80 ft pl ai DHW Sys 1 Status Altered Y Verify Existing DHW Sys 1 d 9 0 Se i Altered DHW Sys 1 DHW Tankless E 2 0 Bortom i Existing DHW Sys 1 DHW old Win Head Height 67 ft DHW Sys 2 Status New E New DH System 2 none Mw 10 5 2 HVAC First determine 1 if an existing system will be extended to serve an addition 2 if a replacement altered system including ducts will be installed for the whole house or 3 if a supplemental system will be added for the addition only Existing equipment does not need to meet current Standards Exception 4 to Section 150 2 a 10 5 2 1 Existing equipment to serve addition For the existing and new zones set the system status to existing and model the actual values for the existing system Figure 10 9 The distribution system data will have both existing and new sections of the system defined Figure 10 10 10 5 2 2 Replacement system for whole house For the existing and new zones set the system status to altered and model the proposed conditions for the equipment if selecting Verify Existing System also specify the existing
91. centive Report To view results on sceen once a compliance report is run select the appropriate tab see Figure 2 6 For a printed report select Generate CAHP CMFNH Report from the Tools menu To generate CAHP results see Section 4 9 Figure 2 6 CAHP Results Energy Use Details Summary CAHP CAHP Std Proposed CAHP Results Design Design 3 R P End Use KTDVARy KTDVsR yr currently only applicable to single family projects contact your utility provider for multifamily projects Space Heating 21 93 21 89 Space Cooling 28 55 11 32 Kicker Surnmary Score Out Of IAQ Ventilation 1 13 Jk DOE Zero Energy Ready D 5 Other HVAC 0 00 0 00 Future Code Ready D 5 Water Heating 13 36 13 36 PY Credit 0 00 Low Use Home 0 5 Compliance Total 47 70 Ultra Low Use Home H 5 Inside Lighting 11 16 11 16 Appl amp Cooking 13 80 13 80 Initial CAHP Score 84 Plug Loads 22 73 22 73 Final CAHP Score 84 Exterior 1 16 1 16 Total CAHP Incentive 300 TOTAL 113 82 96 55 2 10 Error Messages If you are using the program for the first time and the program will not run see Section 2 1 1 If a file will not run and you receive no clear error message select Tools and pick the option View Project Log File This file provides clues as to what is wrong It contains a lot of repetitive information so you have to sift through a lot of data Start at the bottom of the file and work up to find the word Error and look for a clue as to where the error may be loca
92. ch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 10 3 Mass or Other Unframed Walls 6 10 3 1 Inside Finish Default value gypsum board 6 10 3 2 Insulation Furring List the insulation installed if the walls are furred on the inside Select the thickness and type of furring which is 0 5 inch to 5 5 inch thick wood or metal 6 10 3 3 Mass Layer List the material which varies based on the construction type and includes concrete brick light weight LW medium weight MW or normal weight NW concrete masonry units CMU with solid grout insulated cores or empty cores Select the thickness 6 10 3 4 Insulation Furring List the insulation installed if the walls are furred on the outside Select the thickness and type of furring which is 0 5 inch to 5 5 inch thick wood or metal 6 10 3 5 Exterior Finish Exterior finish options are wood siding 3 coat stucco or R4 synthetic stucco also known as 1 coat stucco and wood siding sheathing decking 6 10 3 6 Non Standard Spray Foam in Cavity This check box identifies that additional documentation and HERS verification requirements apply because the claimed R value exceeds the default assumption of R 5 8 per inch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 10 4 Below Grade Walls Underground or below grade walls that are concrete ICF Brick can be created using the right click create underground walls option on the construction assembli
93. checking the box System Heats DHW or domestic hot water The inputs for the water heating equipment data are 9 8 1 1 Tank Volume Enter the tank volume in gallons 9 8 1 2 Insulation R value R value of external tank insulation 9 8 1 3 Ambient Conditions Specify whether it is installed in unconditioned or conditioned space NOTE The final step is to connect the HVAC system to the DHW system In this example an HVAC system named Ground Source HP was specified and can be selected to serve as the water heating system for the zone Once this connection is made the mechanical tab will look like Figure 9 11 9 10 CBECC Res User Manual Domestic Hot Water Figure 9 10 Water Heater from an HVAC System Water Heating System Data Solar Water Heating Data Recirculation Loops Currently Active DHW System GSHP D System Name GSHP Dwelling Unit Distribution Standard gt Count Water Heater s 1 Ground Source HP X 1 none create new Water Heater and apply only here create new HVAC System and apply only here Large 75 G 80 TE 2 0 SBL Lrg 100 G 96 TE 1 02 SBL Ground Source HP Figure 9 11 Water Heating Correctly Connected to HVAC Envelope Mechanical TA Project Ground Source Heat Pump GroundSourceHP Heat Pump E GSHP E pi Ground Source DHWY GroundSourceHP Heat Pump E GSHP Heating Systems nu CO Cooling Systems e 9 11 CBECC
94. cklist for Compliance Submittal The form needed for a compliance submittal includes a CF1R which is registered with a HERS provider if HERS verification is required see Section 1 7 Supporting documentation that could also be required is the roofing material rating from the Cool Roof Rating Council solar water heating documentation to support a modeled solar fraction AHRI certified efficiency of cooling heating and or water heating equipment NFRC certified U factor and Solar Heat Gain Coefficient for windows and skylights or any supporting documentation requested by the building department to verify modeled features 1 13 Related Publications In addition to this manual users of the software need to have the following documents as a resource during the compliance process e 2013 Building Energy Efficiency Standards P400 2012 004 CMF May 2012 contains the official Standards adopted by the Energy Commission e Residential Compliance Manual P400 2013 001 SD June 2013 is the interpretive manual for complying with the Standards also contains sample compliance forms e Reference Appendices for the 2013 Building Energy Efficiency Standards P400 2012 005 CMF May 2012 is the source document for climate zones HERS protocols for measures requiring verification by a HERS rater as well as eligibility and installation criteria for energy efficiency measures e Residential Alternative Calculation Methods ACM Reference Manual P400 2013 0
95. cncicncncnonos 7 5 Walls asc iii 6 11 CBECC Res User Manual Advanced Wall Praming 6 3 Below grade cococonccionononononcncacanonononcnnnraoos 6 13 7 7 Between house and garage eooccccccncncncnononoss 6 14 Demagog deed sins tocino 6 14 Garage exterior sessirnir 6 15 Mtera i 6 14 Knee Walls ise iretsi 6 4 6 14 7 4 Mandatory msulatton 6 2 Mass catar de 6 13 Mass insulation sisii iksiri 6 2 PALEY EE 4 2 MP Sin Weird ia 6 14 Uninsulated een 6 15 Water heating Additions and Alterations en 10 4 Combined budromie 9 9 Different types in same ZONE cece 5 1 Distribution type ooconononcnconnncncnrornnnononros 9 2 9 4 Heating element suaian an 9 7 Hydronic separaten 9 9 Pilot energy ein neet nE 9 8 Small or large En 9 1 Solar Trachom iaren 9 6 Solar systemi sinsin ini 9 5 Standby Joes un 9 8 Tank Peine 9 1 9 7 Watermark Not registered een 1 3 Not useable snssonioiosen onni ndoi 2 4 RemMOVING sceri i i i ias 1 4 Watts CFM Mandatory reguirement ccc 8 27 lee 8 27 What s new in this Version sesser 1 2 Whole house fan 4 9 8 28 Window DIMENSIONS iii in 7 15 Glass OS wines diante 7 19 Head height een 5 2 Mandatory maximum U factor o 7 14 Mul Dpbher eerste ere 7 16 Overall area suns dorada diese 7 15 SIG Evita E 6 19 7 16 Skyline 7 19 DP 4 1 6 18 7 14 7 15 RE e EE 6 19 7 16 tee 8 15 ZIP CODG ih eegene 4 3 Zonal contro b enaa aa aa niih 4 8 5 2 Bypass duet 8 23 CBECC Res User Manual
96. culation methods for demonstrating compliance with its building energy efficiency standards CBECC Res version 3b1 incorporates corrections bug fix to the compliance manager that was previously approved by the Energy Commission on December 3 2014 as part of the Application Programming Interface in the 2013 Public Domain California Building Energy Code Compliance Residential CBECC Res software version 3b CBECC Res version 3b1 updates the following e Standard design assumptions for specific addition alteration conditions altering HVAC altering distribution system adding water heater e Fan efficacy in systems with heating only e Window area calculations in mass walls Addition alteration conditions including adding windows to existing building non ducted heating combined with non ducted cooling and e Air leakage for multiple attics Notice of Update to CBECC Res v 3b1 In approving CBECC Res version 3 on August 27 2014 the Energy Commission directed the Executive Director to take all actions reasonably necessary to ensure that CBECC Res is maintained and revised to accurately estimate the energy use of residential buildings and demonstrate compliance with the 2013 Building Energy Efficiency Standards for buildings including correcting functional errors By approving CBECC Res version 3b1 approval of CBECC Res version 3b expires for permit applications made on or after February 20 2015 leaving as approved vers
97. cy for the equipment type e g 80 6 AFUE The software will include the minimum efficiency for typical system types Efficiency information for a specific model number of heating and cooling equipment is found by performing an advanced search in the Energy Commission s appliance directories http www appliances energy ca gov or from the Air Conditioning Heating and Refrigeration Institute AHRI Certified Products Directory http www ahridirectory org 8 5 CBECC Res User Manual Descriptor Mechanical Systems Table 8 1 Heating Equipment Heating Equipment Reference Boiler Not enabled Gas or oil boiler Boiler may be specified for dedicated hydronic systems or as part of a combined hydronic system providing space and water heating Distribution is non ducted Efficiency metric AFUE for Hydronic using a boiler model Combined Hydronic and see Sections 8 2 6 and 9 7 Central Furnace Fuel fired central furnaces propane furnaces or heating equipment considered equivalent to a gas fired central furnace such as wood stoves that qualify for the wood heat exceptional method Gas fan type central furnaces have a minimum AFUE 78 Distribution is ducted Efficiency Metric AFUE Combined Water heating system can be storage gas storage electric or heat pump water heater Hydronic Distribution systems can be ducted or non ducted Electric All electric heating systems other than heat pumps
98. d Duct Effective R values oooooconncccinicononcccnonnnnnccccconcc ronca nana 8 26 Water Heater Distribution System Multipliers ccceeececeeeeeeeeeeeeeeceeeeeeceaeeeeaeeseeeeesaeeeseaeeseneeeeaees 9 3 Default Recirculating Pump Motor Efficiency nara na norris 9 5 XV CBECC Res User Manual Overview Chapter 1 Overview 1 1 Approval for Compliance California Building Energy Code Compliance CBECC Res 2013 is an open source software program developed by the California Energy Commission for demonstrating compliance with the low rise residential 2013 Building Energy Efficiency Standards Standards The Standards become effective for new construction on July 1 2014 CBECC Res was originally approved on September 11 2013 see Appendix A for the most recent resolution from the Energy Commission The low rise residential standards apply to single family dwellings R 3 occupancy group and to multi family buildings R 1 or R 2 with 3 stories or less All hotels and motels and multi family buildings with 4 or more stories are outside the scope of the low rise standards The 2013 compliance manager is the simulation and compliance rule implementation software specified by the Energy Commission The compliance manager called CBECC Res models features that affect the energy performance of the building Mandatory requirements as specified in Sections 110 0 through 110 10 and 150 0 of the Standards are not always modeled An exc
99. d data left side of evaluating rule Rule 1 334 Line 1822 Set Win TotAreaInclMult 1 total 2014 Aug 01 07 39 36 ERROR Undefined data left side of evaluating rule Rule 1 336 Line 1824 Set Win TotAreaInclMult 2 new altered 2014 Aug 01 07 39 36 ERROR Undefined data right side of evaluating rule Rule 1 601 Line 2992 Set Win MaxArea 2014 Aug 01 07 39 36 ERROR Undefined data left side of gt evaluating rule Rule 1 604 Line 3001 Set Win MaxMultiplier NOTE If you still find no obvious errors send your ribd file found in the CBECC Res 2013 Projects folder via e mail to cbecc res gmail com with your contact information Following is a list of potential error messages pszCSEEXEPath doesn t exist pszCSEWeatherPath doesn t exist psz DHWDLLPath doesn t exist One or more missing files CSE ASHWAT or T24 DHW ASM32 TDV UNZIP WTHR DLLs pszBEMBasePathFile doesn t exist pszRulesetPathFile doesn t exist Error initializing BEMProc database amp rules processor module Error initializing compliance ruleset Invalid project log file name too long Error writing to project log file Building model input project file not found Error reading initializing model input project file Error evaluating ProposedInput rules Error retrieving CSE weather file name from Proj WeatherFileName VD OND TF WN r PRP PY PWN RF CH
100. d in order to take credit for a verified duct design enter the return duct details for area diameter and location The calculations assume that the return duct is located entirely in the attic unless a the return duct is located entirely in the basement in which case the calculation shall assume basement conditions for the return duct efficiency calculation or b the return duct is located entirely in conditioned space and the system meets the requirements for Verified Low Leakage Ducts in Conditioned Space in which case the return duct is assumed to be in conditioned space 8 4 2 Low Leakage Air Handlers Credit can be taken for installation of a factory sealed air handling unit tested by the manufacturer and certified to the Energy Commission to meet the requirements for a Low Leakage Air Handler Field verification of the air handler s model number is required A Low Leakage Air Handler is reported on the compliance report and field verified in accordance with the procedures specified in Reference Appendices Residential Appendix RA3 1 4 3 9 8 23 CBECC Res User Manual Mechanical Systems Table 8 6 Summary of Verified Air Distribution Systems Measure Description Duct Sealing Mandatory measures require that space conditioning ducts be sealed Field verification and diagnostic testing is required Supply Duct Location Reduced Compliance credit for improved supply duct location reduced Surface Area and R value surface
101. dard and one proposed e Perform Analysis same as short cut key runs file to determine if it passes or fails compliance e Review Analysis Results displays compliance results if available e Generate Draft T 24 Compliance Report creates a draft CF1R which will have a watermark with not useable for compliance for a not registered watermark see Section 1 6 e Generate CAHP CMFNH Report generates a CAHP Incentive Report C1R see Section 4 9 2 3 6 Help e Help Topics not enabled e Quick Start Guide opens an overview of the software and frequently asked questions e User Manual opens this user manual document e Mandatory Requirements for Assemblies opens a list of minimum requirements for construction assemblies for example a steel framed wall with no rigid insulation does not comply with the minimum requirement of Standards Section 150 0 e About to determine the version of CBECC Res is installed 2 4 Tool Bar This section explains the program features accessed by clicking the icons on the tool bar at the top of the screen see Figure 2 2 New File This button closes the current file if one is open and opens a new file Open Existing File La This button launches the open dialog box to enable opening an existing file If another file is open a prompt to save that file before proceeding will appear 2 4 CBECC Res User Manual Getting Started Save File i This button saves the file under i
102. dix RA4 6 1 4 4 1 7 Analysis Report The default report type is Building Summary csv 4 4 1 8 Run Scope The two types of projects are Newly Constructed or Addition and or Alteration 4 4 1 9 Addition Alone project For an addition alone analysis you must select Newly Constructed check Addition Alone project and enter the fraction of a dwelling unit Addition Area Existing Addition Fraction 4 5 CBECC Res User Manual Project 4 5 Building The Building tab see Figure 4 3 is used to provide basic information about the building Figure 4 3 Building Information Building Description 2100 ft2 CEC Prototype with tile roof Air Leakage Status New v Air Leakage 5 ACH 50Pa Insul Construction Quality Standard y Perform Multiple Orientation Analysis Single Family C Multi family jw Natural Gas is available at the site Number of Bedrooms 3 Zonal Control Credit living vs sleeping jw Has attached garage 4 5 1 Building Information 4 5 1 1 Building Description The building description will appear as the second line of general project information on the CF1R It is a user defined label and is different from the project name 4 5 1 2 Air Leakage Status Valid options are New and Altered New construction is new For an addition and or alteration where infiltration testing will be performed for compliance credit use altered 4 5 1 3 Air Leakage Input as Air Changes per Hour 50 Pascals A
103. documentation and HERS verification requirements due a claimed R value that exceeds the default assumption of R 5 8 per inch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 8 2 6 Raised Heel Truss Check box to indicate if there is a raised heel truss and its height in inches With a standard roof truss Figure 6 3 the depth of the ceiling insulation is restricted to the space left between the roof deck and the wall top plate for the insulation path and the space between the bottom and top chord 6 8 CBECC Res User Manual Construction Assemblies of the truss in the framing path If the modeled insulation completely fills this space there is no attic air space at the edge of the roof Heat flow through the ceiling in this attic edge area is directly to the outside both horizontally and vertically instead of to the attic space Figure 6 3 Section at Attic Edge with Standard Truss Potential radiant barrier Potential roof deck insulation moeie q SE Finish system sere A raised heel truss Figure 6 4 provides additional height at the attic edge that depending on the height and the ceiling insulation can either reduce or eliminate the attic edge area and its thermal impact Figure 6 4 Section at Attic Edge with a Raised Heel Truss Potential below deck insulation Finish 6 9 CBECC Res User Manual Construction Assemblies 6 9 Cat
104. dow efficiencies need to change using a window type allows this update to occur more efficiently see Section 6 12 7 7 1 5 Specification Method Select either Window Dimensions required for fins and overhangs or Overall Window Area 7 15 CBECC Res User Manual Building Envelope 7 7 1 6 Model Window Fins and or Overhangs Check box is available only when Section 7 7 1 4 is set to window dimensions 7 7 1 7 Window Area If using the overall window area enter the area of a window in square feet and the multiplier For example if there are three 3 5 windows enter window area 15 ft and multiplier 3 7 7 1 8 Width If using the window dimensions method enter the window width in feet 7 7 1 9 Height If using the window dimensions method enter the window height in feet 7 7 1 10 Multiplier The number of identical windows NOTE must also have identical overhang and fin conditions if modeled 7 7 1 11 NFRC U factor If a window type was selected above this value is auto completed using a U factor from National Fenestration Rating Council NFRC for the window product not the center of glass value www nfrc org Alternatively enter the default value from Standards Section 110 6 Table 110 6 A 7 7 1 12 Solar Heat Gain Coefficient If using a window type was selected above this value is auto completed using a Solar Heat Gain Coefficient SHGC from NFRC for the fenestration product www nfrc org Alternati
105. dren to spaces The tree controls vary in the components they display depending on which folder is selected 2 6 3 Rapid Editing The tree control can be used to move and copy components or groups of components To move a component just drag and drop If an association is not allowed the program will prevent the move To copy a component select the component copy and paste It is advisable to rename copied components to maintain readability Whenever parents components are moved copied or deleted child components are included Components shown on the tree can be moved using a drag and drop technique provided it results in a compatible parent child relationship For example you can drag a window onto a different wall but not vice versa A set of right click edit commands can be used with the tree control These are described above in Section 2 6 Double clicking on any component on the tree opens its input dialog window 2 7 Keyboard Navigation If your preference is to navigate in ways that rely less on the use of a mouse you can use the following alternative procedures for getting from one field to another and to access the rick click tools menu 1 Up down arrow moves up down the tree 2 lt Alt gt Enter opens data for object highlighted then tab to the field 3 lt Alt gt Fl1 opens the right mouse quick menu Once open a Up down arrows to highlight a selection and lt enter gt or type the letter such as E
106. e Heating Seasonal Performance Factor HSPF for a specific model number from the AHRI Certified Products Directory http www ahridirectory org CBECC Res User Manual Mechanical Systems 8 2 5 4 Capacity 47 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org Capacity is used to determine the energy use of the backup electric resistance heat In a multi family building you will indicate the capacity for the defined system and specify the number of units of that given capacity assigned to the zone see Section 8 1 1 5 8 2 5 5 Capacity 17 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org 8 2 5 6 SEER Cooling equipment Seasonal Energy Efficiency Ratio EER 8 2 5 7 EER Cooling equipment Energy Efficiency Ratio EER Required inputs for a mini split or multi split heat pump are the HSPF capacity at 47 F and 17 F the SEER and EER Mini split and multi split heat pumps are assumed to be equivalent to a standard design ducted HVAC system Figure 8 8 Mini Split Heat Pump Data Heat Pump Data Currently Active Heating System MiniSplit y Name MiniSplit Type DuctlessHeatPump Heating side of ductless mini split heat pum gt DuctlessHeatPump One or more heat pump outdoor units that use refrigerant to transport heat to at least one terminal in each habitable space in the dwelling unit Efficiency Metri
107. e allowed is 6 Valid options are 0 2 1 4 2 6 0 8 0 10 0 and 12 0 8 4 1 6 Has Bypass Duct If the system is zonally controlled indicate if the system has a bypass duct This is a HERS verified feature Reference Appendices Residential Appendix RA3 1 4 6 8 4 1 7 Supply Ducts If Section 8 4 1 3 is unchecked so that credit may be obtained for a verified duct design reduced surface area see Reference Appendices Residential Appendix RA3 1 enter the supply duct details for area diameter and location The supply duct begins at the exit from the furnace or air handler cabinet The supply duct surface area for crawl space and basement applies only to buildings or zones with all supply ducts installed in the crawl space or basement If the supply duct is installed in locations other than crawl space or basement the default supply duct location is Other Do not include the surface area of supply ducts completely inside conditioned space or ducts in floor cavities or vertical chases when surrounded by conditioned space with draft stops The surface area of each supply duct system segment is calculated based on its inside dimensions and length The total supply surface area in each unconditioned location attic attic with radiant barrier crawl space basement other is the sum of the area of all duct segments in that location 8 4 1 8 Return Ducts Return duct surface area is not a compliance variable If Section 8 4 1 3 is unchecke
108. e available e Item Help Accesses help information applicable to the selected input field feature currently not available e Topic Help Accesses help information applicable to the selected component feature currently not available e Restore Default Returns the value of the field to its default value if applicable e Critical Default Comment Opens a dialog enabling you to enter a justification for overriding values designated by the Standards as critical defaults i e a value that should only be overridden with special justification feature currently not available 2 6 1 Analysis Types Proposed Only Simulates the proposed building s energy use using the 2013 compliance rules without establishing the standard design Proposed and Standard In addition to simulating the proposed design simulates the standard design building one that complies with the 2013 prescriptive Standards to establish the energy budget for compliance 2 6 2 Building Tree Controls Parent Child Relationships In order to analyze a building s energy use it is necessary to track relationships among building components CBECC Res displays these relationships using the familiar tree control found in 2 6 CBECC Res User Manual Getting Started Windows Explorer and many other applications For example under the envelope tab exterior walls are shown as parents to windows Windows are connected to exterior walls and appear under walls as chil
109. e specification given in Table 150 0 C or D However if a value less than 0 58 Watts CFM is modeled for compliance credit the fan efficacy value must be verified and the alternative is not allowed If no cooling system is installed this value is assumed to be 0 58 W CFM 8 6 Indoor Air Quality IAQ Fan Data Figure 8 17 IAQ Fan Data IAQ Fan Data Currently Active Fan ag Fan 1 v Name IAQ Fan 1 IAQ CFM 60 0 CFM W 7 CFM IAQ Vent 1 200 WICFM IAQ Fan Type Balanced Da IAQ Recovery Effectiveness 70 00 Mechanical ventilation is required to meet minimum indoor air quality IAQ requirements of ASHRAE Standard 62 2 see Residential Compliance Manual Section 4 6 and CF2R MCH 27 for single or multi family dwelling units The IAQ system requires HERS verification meeting Reference Appendices Residential Appendix RA3 3 The simplest IAQ fan system is an exhaust fan such as a bathroom fan that meets the criteria in ASHRAE Standard 62 2 for air delivery and low noise and that operates continuously More advanced IAQ fan systems have a supply or both supply and exhaust fans In most cases the energy impact of this mandatory requirement is neutral The only system for which credit can accrue is a central fan integrated system with HERS verified W CFM of less than 0 58 8 6 1 1 Name User defined name must be the same name as specified in Section 4 7 8 6 1 2 IAQ CFM Enter the size of fan being installed
110. e that it has picked up the U factor and SHGC from the window Type Leave the remaining values as defaults To add an overhang click on the Window Overhang tab at the top of the screen You will see an illustration of the inputs Enter a Depth of 2 feet a Dist Up of 1 foot and an Extends Left and Extends Right of 7 feet each Leave the Flap Height as 0 Complete the overhang by clicking lt OK gt Still on the back wall create a 5 x6 8 sliding glass door by right clicking picking lt create gt a window named SGD copy window B1 Pick SGD from the window type library and enter the width as 5 and a height of 6 67 Change the overhang to have a left distance of 3 and a right distance of 22 Finally right click the Right Wall using the same method to create a window Tell the program to copy the data from the first window changing the multiplier to 1 Change the overhang Extends Left and Extends Right values to 10 5 each All other data remain the same Click lt OK gt Next add a slab floor by moving back up to House Right click and choose lt create gt and then pick lt Slab on Grade gt Enter an area of 600 square feet a floor elevation of 0 67 or the level of the surface of the floor above grade and a perimeter equal to the length of the four sides exposed to the exterior 100 Note If there was a garage the edge no longer includes the length of the edge adjacent to the garage but only adjacent
111. e the actual orientation of the modeled surface See Section 7 1 7 5 CBECC Res User Manual Building Envelope Figure 7 5 Surface Tilt Outside Inside Outside Walls have a tilt greater than 60 dadas tilt Outside Floors have a tilt but less than 120 Geen sd of 180 degrees degrees from the egrees from the from the horizontal horizontal horizontal 7 2 5 Party Walls and Surfaces If each dwelling unit in a multi family building is modeled as a separate zone model any interior walls separating one dwelling unit from another as part of both dwelling units Both zones are identified as well as checking the box that the zone on the other side is modeled see Figure 7 6 Figure 7 6 Party Wall Interior Wall Data Currently Active Wall Int Wall E Interior Wall Name Int Wall Belongs to Zone Conditioned El IV Is a Party Surface M Zone on Other Side Is Modeled Zone on Other Side Conditioned 2 E Construction Interior R O El Wall Area 400 ft2 When modeling an addition the wall separating the addition from the house garage or other unconditioned space must be modeled If the zone on the other side of the surface is not modeled e g addition alone adjacent to garage model the interior wall as a party surface 7 3 Below Grade Overview This is an overview of the inputs scattered throughout the user manual that are related to modeling below grade surfaces also known
112. e top of the screen Items in the project tree Construction Assemblies and Material Layers are not project components but are a library of assemblies and materials At this point some of the folders are empty but will be populated by the time the input file is fully created To continue right click on the Project title From the drop down menu choose lt create gt then choose lt zone gt Enter the zone name House and click lt OK gt At the next dialog box the zone type is Conditioned and you will enter 600 square feet for the floor area and 8 feet for the average ceiling height Click lt OK gt You have created a child component to the project component which can now be described more fully You are at the Zone Data tab of the building model data dialog box where you will add an HVAC system to the conditioned zone a Click the drop down menu arrow at the HVAC System box and choose to lt Create new HVAC System gt At the next dialog box accept the default name by clicking lt OK gt b At the HVAC System Type pick from the drop down menu Other Heating and Cooling System and click lt OK gt c This opens the HVAC System Data fields where you will define the system starting with the Heating Unit From the drop down box where it has none pick lt create new heating system gt For now keep the default name Heating System 1 and click lt OK gt Pick the equipment type as CntrlFurnace a
113. e types include no attic floor and wood siding sheathing decking 6 9 2 2 Above Deck Insulation Options include no insulation or R1 to R60 6 9 2 3 Roof Deck The default is wood siding sheathing decking 6 9 2 4 Cavity Frame List the compressed R value of cavity insulation see Section 6 1 in the cavity column The framing column is to indicate the size of the framing and the spacing e g 2x12 with 24 inch on center framing Also included is an option for a 2x4 bottom chord of truss at 24 inches on center 6 9 2 5 Sheathing Insulation List the sheathing or insulation layer Options are no sheathing insulation gypsum board wood sheathing and R1 to R60 insulation 6 9 2 6 Inside Finish This is the inside finish if any of the roof A layer of gypsum is typically included 6 9 2 7 Non Standard Spray Foam in Cavity This check box identifies additional documentation and HERS verification requirements due a claimed R value that exceeds the default assumption of R 5 8 per inch for closed cell and R 3 6 per inch for open cell see Section 6 4 6 10 Walls Wall constructions are accessed by creating a new wall inside the conditioned zone or creating modifying an assembly in the list of Construction Assemblies Walls Figure 6 6 are defined from the inside surface to the outside Interior walls are modeled the same as exterior walls For a description of when a wall is modeled as interior for example demising or walls separating t
114. eas and performance characteristics such as insulation R values U factors SHGC are defined by the program user The entries for all of these building elements must be consistent with the actual building design and configuration 1 14 4 Standard Design CBECC Res creates a version of the proposed building that has the features of Section 150 1 c and Table 150 1 A Package A in the specified climate zone to establish the allowed energy budget or standard design The standard design is compared to the proposed design and if it complies a Certificate of Compliance CF1R can be produced For newly constructed buildings the standard design building is in the same location and has the same floor area volume and configuration as the proposed design except that wall and window areas are distributed equally between the four main compass points North East South and West For additions and alterations the standard design has the same wall and window areas and orientations as the proposed building The basis of the standard design is prescriptive Package A from Section 150 1 c of the Standards Table 150 1 A Package A requirements not repeated here vary by climate zone Reference Appendices for the 2013 Building Energy Efficiency Standards Reference Appendices Joint Appendix JA2 Table 2 1 contains the 16 California climate zones and their representative city The climate zone can be found by city county and zip code in JA2 1 1 Detailed
115. eeeeesnaeseseeeeesnenss A 1 Appendix B a TE FIGURES Figures 1 STUD isaac aa EE 2 1 Figure 2 2 Menu ie Tool ntti evel nell ahaa ai baba le iad 2 2 Figure 2 3 Main reina 2 5 Figure 2 4 Energy Use Detail Results ccoo adrede 2 8 Figure 2 5 SUMIMALY RESUITS cicle novata 2 9 Figure 2 6 GAHP ResuliS rico ii A A EE 2 9 Figure 3 1 Simple House Exvample conc ncn nn ccrrrr 3 1 Figure 3 2 Output for Simple House in Climate Zone 172 3 6 Figure 3 3 Updated Output for Simple House 3 7 Figure 4 1 Project Information ici 4 3 Figure 4 2 Analysis Intormaton cc ceecesceeeceeeeeeeeeeeeeeaeeeeeeseeeseeeeeeessaeecaeecaeesaaecaaeseaeseaeseaeseaesseeeseneseeeeeneenaes 4 3 Figure 4 3 Building Information EEN 4 6 Figure 4 4 Cooling Ventilation sinsero iieii iiaii iiidid aidia idadaan ana 4 9 Figure 4 5 CAHP CMENH retna eaa aaae apaa rr 4 10 Figure 4 6 CAHP Incentive Report CO 4 11 Figure 5 1 Conditioned Zone Data EEN 5 1 Figure 5 2 Dwelllig Umt Data sates coi atrocidad bid de a seid asa dale Dd AAA A A AAA id 5 3 Figure 5 3 Attic Model Components utk untu Atun tE EEA NEENEAAEENEEAEEA EAE EENEA EA nEE EE nE Eann nn eaaa 5 5 Figure 5 4 Attic Z0ne RE EE 5 5 Figure 5 5 Crawl Space EEN 5 8 Figure 5 6 Garage Zone Data mic ardido ld 5 9 Figure o 7 Dwelling Unit Typa icon ori 5 10 Figure 6 1 Attic Construction Data coi atada 6 6 Figure 6 2 Ceiling Below Attic Aesembhy crac n cnn cnc 6 8 Figure 6 3 Section at Attic Edge with Standard Truss
116. eesaas 10 7 Figure 10 7 Altered Without Verified Existing Conditions cceccccceeeeeeeeeceeeeeeaeeeeeaeeeeeeeseaeeesaaeeeeaaeeeeneeeaas 10 7 Figure 10 8 Altered HVAC and DEUM 10 8 Figure 110 9 EXISTING Syste ihc iaa aia 10 9 Figure 10 lt 1 0 Duct Syste BEER 10 9 XIV TABLES Table 2 1 Table 2 2 Table 4 1 Table 4 2 Table 5 1 Table 6 1 Table 6 2 Table 8 1 Table 8 2 Table 8 3 Table 8 4 Table 8 5 Table 8 6 Table 8 7 Table 9 1 Table 9 2 Input Classification Explanations c ccccceecececeeeeeeeeeeeeeeseeeeeeeeaeeeeaeeseeeeesaaeeesaaeseeeeeseeessiaeeseeeeeaas 2 13 Data Source Explanations niiit neni dE eiert aide hia ee eas ie ae ea td 2 13 PV Credit Calculation Factors stnn nnnnnnnnsnnntn ennenen 4 5 Cooling Ventilation Fans its ia 4 10 Solar Reflectance and Emittance for Aggregate Materials 0 ccccceeeeeeesseeeeeeeeseeeeeteaeeeeeeeeeeeee 5 7 Compressed Insulation R Value cccccecesceceeeeeceeeeeaeeeeeeee cnn narran 6 1 Required Thickness Spray Foam INSulation 0 ccccccccceceeeeeeeeeeeeeeeeeeeeeeeaaeeseaeeseeeeeseeeeesaeeeeeeseeeee 6 3 elt Mine De tel TEE 8 6 elt s uma Ge Te 8 7 G oling EquipMmeNt asariga lidia aia 8 16 Air Conditioning Measures Requiring HERS Vertflcaton 8 17 Angels IR de 8 22 Summary of Verified Air Distribution Systems ccceeeeceeeeeeeeeeeceeeeeeeaeeeeaaeseeeeeseaeeesaaeeseaaeeeeneeeeas 8 24 Burie
117. em details of which are specified as shown in Section 8 2 8 1 1 5 Count Number of specified heating units to be installed 8 1 1 6 Unique Cooling Unit Types Indicate the number of unique system types Not the same as count which is the number of systems When modeling multiple efficiencies in a single zone the worst case efficiency is assumed in the compliance analysis CBECC Res User Manual Mechanical Systems 8 1 1 7 Cooling Unit Name of the cooling system details of which are specified as shown in Section 8 3 heat pump cooling is included with heating in Section 8 2 2 8 1 1 8 Count Number of specified cooling units to be installed 8 1 1 9 Cooling Vent When displayed for a central fan integrated night ventilation cooling system select Fixed Flow 8 1 1 10 Cool Vent Fan When displayed specify the fan that circulates air for cooling ventilation or create a new fan with CFM and W CFM details This system will require HERS verification 8 1 1 11 Fixed Flow When displayed specify the fixed flow CFM for the system or let the program set the default value 8 1 1 12 Watts CFM When displayed specify the Watts CFM for the proposed central fan integrated night ventilation cooling system The default value is 0 58 Watts CFM 8 1 1 13 Distribution Name of the duct or distribution system details of which are specified as shown in Section 8 4 In some cases none can be modeled For example where a default syste
118. eparate zone with four dwelling units in each zone served by individual water heaters MFexample18CentralSolarDHW ribd An eight unit two story multi family 6960 ft two story building with each story as a separate zone with four dwelling units in each zone served by central water heating with 35 solar contribution Menu Bar The menu bar at the top of the screen see Figure 2 1 allows you to access many of the program s features Figure 2 2 Menu and Tool Bar File Edit Ruleset View Tools Help Dielgl eje S fe e 2 2 CBECC Res User Manual Getting Started 2 3 1 File The file menu contains the standard functions for file management opening and saving files save as to rename a file and exiting the program 2 3 2 Edit Most users will use the right click options to edit rename create and delete components which offer more control see Section 2 6 In addition to the standard cut copy and paste commands the edit menu contains several commands for editing building descriptions They are e Edit component e Create component e Delete component NOTE Use delete component carefully The default condition is to delete the entire project 2 3 3 Ruleset Although not yet enabled CBECC Res 2013 is designed to support multiple rulesets that implement the requirements of different codes When enabled the ruleset menu will allow switching to a different compliance ruleset Typically changing to a diff
119. eption for example is insulation values Section 150 0 includes mandatory minimum insulation levels for framed walls floors and ceilings It is the responsibility of the program s user to be aware of the requirements of the Standards This manual is a guide to the program s use It provides a description of software inputs and a guide to using the software Knowledge of the Standards is a pre requisite As the documentation author you are responsible for the content of the compliance document produced by CBECC Res which is submitted to the enforcement agency as proof of compliance with the Standards 1 2 Background The Standards allow compliance using either a prescriptive or performance method The prescriptive method is found in the Residential Compliance Manual see Section 1 13 Related Publications for information on obtaining this document Performance compliance uses building modeling software to demonstrate compliance with the Standards CBECC Res is the public domain compliance manager meaning it is the simulation and compliance rule implementation software specified by the Energy Commission The document Residential Alternative Calculation Methods ACM Reference Manual ACM Reference Manual see Section 1 13 Related Publications explains how the proposed and standard designs are determined If you have questions about how the software models a building feature refer to the ACM Reference Manual 1 1 CBECC Res User M
120. erent code requires changes to inputs Users will need to pay special attention to instructions for performing accurate analysis under a different ruleset 2 3 4 View The view menu enables you to toggle on and off the display of the tool bar at the top of the screen and the status bar at the bottom of the screen 2 3 5 Tools The tools menu contains the following options e Program and Analysis Options Proxy Server Settings e View T 24 Compliance Report If there is a CF1R in the projects directory it opens that file e View Project Folder opens the folder that contains the project files e View Project Log File contains file history error messages e Delete Project Log File since this file contains the entire history of an input file this tool deletes thelog file to start fresh e Check Building Database checks for major errors 2 3 CBECC Res User Manual Getting Started e Generate HVAC Equipment Report Records gives the ability to view on screen what will be required of the installer and HERS Rater e Generate DHW Equipment Report Records gives the ability to view on screen what will be required of the installer and HERS Rater e Generate IAQ Ventilation Report Records gives the ability to view on screen what will be required of the installer and HERS Rater e Building Summary Report input model opens a csv file in Excel e Building Summary Report proposed standard opens two csv files in Excel one stan
121. erior Wall Default is the existing wall When copying window data to another zone the program changes this to the new exterior wall 7 3 3 3 Door Status The default is new for new construction or if part of an addition Other options include altered and existing 7 3 3 4 Door Area Enter the door area in square feet 7 3 3 5 U factor Default value is 0 50 for opaque doors 1 00 for the large garage doors roll up or wood Other values allowed are from Joint Appendix 4 Table 4 5 1 only 7 3 4 Garage Door When modeling a garage zone the large garage doors metal roll up or wood are modeled with a 1 00 U factor 7 4 Raised Floor When creating a raised floor over a crawl space the software will create the associated crawl space zone When a raised floor is over an unconditioned space such as a garage model this as an interior floor with the adjacent zone being the garage A raised floor over exterior is when there is no crawl space and no unconditioned space underneath the floor floor extends out beyond the first floor walls 7 9 CBECC Res User Manual Building Envelope 7 4 1 Floor over Exterior or Crawl Space Figure 7 10 Raised Floor Floor Over Crawlspace Data Currently Active Floor Floor Over Crawlspace El Extrior Floor Name Floor Over Crawlspace Belongs to Zone Conditioned Y Surface Status New E Construction R19 2x6 FlrOvrCrawl E Floor Area 2 100 f2 Floor Elevation
122. es does not include space conditioning equipment load calculations required by Section 150 0 h Mechanical contractors are expected to prepare these and other calculations as part of their responsibilities 1 6 3 Forms There are also new prescriptive form for additions and alterations that do not require registration For a full list of forms see Appendix A of the 2013 Residential Manual You can access print forms at the Energy Commission s web site http www energy ca gov title24 2013standards 1 7 Registering the CF1R When compliance requires HERS verification the Certificate of Compliance CF1R produced by CBECC Res must be registered with a HERS provider such as CalCERTS before applying for a building permit see also Residential Compliance Manual Section 2 1 1 NOTE Beginning with the 2013 Standards every newly constructed building requires HERS verification Indoor air quality Section 150 0 0 is a mandatory requirement that requires HERS verification There are other new HERS verified mandatory measures Please see the 2013 Residential Manual for more information 1 7 1 HERS Upload XML File The file needed to upload a project to a HERS provider is created only when you check the box labeled Full XML on the Analysis tab see also Section 4 4 1 3 before performing the compliance analysis This file is stored in the projects folder My Documents CBECC Res 2013 Projects accessible by selecting the tool vi
123. es list see Figure 6 7 With the 6 13 CBECC Res User Manual Construction Assemblies exception of the exterior surface which is assumed to be soil please see Section 6 10 3 above for wall inputs Figure 6 7 Below Grade Walls Construction Data Currently Active Construction BG Mass R13 bd Construction Name BG Mass R13 Can Assign To Underground Walls Le Ls Construction Type Concrete ICF Brick Construction Layers inside to outside Furring Inside Finish Gypsum Board Insulation Furring H 13 3 5 in Wood Mass Layer Concrete 8 in Le Le Le Le Lol Lal Ls Insulation Furring no insulation none 6 10 5 Structurally Insulated Panels SIPs 6 10 5 1 Inside Finish Default value gypsum board 6 10 5 2 Sheathing Insulation List the continuous insulation layer on the inside surface conditioned space side of the SIP wall Options are R1 to R60 insulation 6 10 5 3 Panel Rated R 75 F Specify the panel s rated R value at 75 degrees in the cavity path R14 to R55 In the frame path list the thickness of the panel and whether it is or is not OSB 6 10 5 4 Sheathing Insulation List the continuous insulation layer on the outside surface of the SIP wall Options are R1 to R60 insulation 6 10 5 5 Exterior Finish Exterior finish options are wood siding 3 coat stucco or R4 synthetic stucco also known as 1 coat stucco and
124. es of space between the outer jacket of the installed duct and the roof sheathing above Additional details regarding the duct design and the inspection process can be found in Reference Appendices Residential Appendix RA3 1 4 Residential Compliance Manual Section 4 4 3 and form CF2R MCH 29 H 8 4 4 1 Buried Ducts Select verified duct design see Figure 8 15 Enter the calculated effective R value of return and supply duct lengths that are partly or completely buried in blown attic insulation of at least R 30 using values from Table 8 7 8 4 4 2 Deeply Buried Ducts Select verified duct design see Figure 8 15 Enter the calculated effective R value of return and supply duct lengths that are enclosed in a lowered ceiling and covered by at least 3 5 inches of insulation above the top of the duct insulation jacket Ducts meeting the criteria for deeply buried ducts have an effective value of R 25 for fiberglass ceiling insulation or R 31 for cellulose ceiling insulation Figure 8 15 Buried Ducts M Verified Duct Design rea R Value Supply Ducts 567 2 25 F ft2 h Btu Return Ducts 105 ff2 25 F ft2 h Btu M Has Buried Ducts QII is required for buried duct credits Has Deeply Buried Ducts 8 25 CBECC Res User Manual Mechanical Systems Table 8 7 Buried Duct Effective R values Nominal Round Duct Diameter Attic Insulation 4 5 6 7 8 10 12 14 16 Effective Duct Insulation R value for Blo
125. ew project folder The file is named lt input file name gt AnalysisResults BEES xml 1 7 2 Registration Process When HERS verification is required for a project the watermark is only removed when the CF1R has completed the registration process at a HERS provider s web site which includes the documentation author and the person who is authorized by the Business and Professions Code to take responsibility for the building design For more information on registering a CF1R find a HERS provider and visit their website for assistance in that process Find approved HERS providers at the Energy Commission s website www energy ca gov HERS providers html As construction progresses follow up documentation certificates of installation CF2R and certificates of verification CF3R are required to confirm that the required measures are installed 1 4 CBECC Res User Manual Overview 1 8 Special Features and Modeling Assumptions The 2013 Residential ACM Reference Manual Appendix C identifies the features that are Special Feature and Modeling Assumptions on the CF1R 1 9 HERS Third Party Verification Appendix C of the ACM Reference Manual identifies the specific measures that require HERS verification or diagnostic testing The CF1R produced by CBECC Res identifies if a building includes any measures requiring field testing or verification by a HERS rater as part of the compliance results See also Section 1 7 and Section 1 14
126. f how to model various scenarios It is not necessary to define a DHW system in either the existing or new zone unless one is being altered or added Define the connection to the existing dwelling if any with an interior surface If this is a wall select the field M is a party surface Figure 10 5 Addition HVAC and DHW Zone Data Currently Active Zone Addition El Name Addition Zone Status New y Type Conditioned El HWAC Sys Status Existing y Floor Area 395 e Existing HVAC Sys Existing HVAC System gt Stories 1 Ceiling Height D Se be DHW Sys 1 Status Existing y Floor to Floor 3 ft a SE Existing DHW Sys 1 L none Bottom 0 7 ft Win Head Height 6 67 ft DHW Sys 2 Status Existing e Existing DHW Sys 2 none Z 10 5 Alteration Model any components that will be altered with the surface status altered and the new characteristics You will only specify the existing characteristics if the existing conditions were verified by a HERS rater see Figure 10 6 and Figure 10 7 The verified check box opens additional fields to define the existing conditions and affect the standard design see Section 10 3 If one component is verified all components must be verified Since only one surface status can be used separately model components that are being altered from those that will not be altered NOTE Deleted or removed surfaces are not modeled 10 6 CBECC
127. feature swipe the cursor across the field right click and select Restore Default The field will change from red to blue to indicate that it will change if a climate zone with a different standard design assumption is selected To prevent unintended changes on window efficiencies see also Window Types in Section 7 7 1 4 4 2 Defining Surfaces Surrounding a Zone CBECC Res applies logic that requires a modeled space to have a ceiling roof floor and sometimes four walls If a space zone is adjacent to another space being modeled the connection between these two zones is achieved by modeling an interior surface wall floor or ceiling in one of the zones When this connection is missing an error message appears which indicates that there are not enough surfaces If the adjacent or connecting zone is not modeled see Section 4 2 1 There are too many variables to cover every situation you may encounter but the general concept is that if an adjacent space is modeled there must be some connection between the two zones This can be an interior wall floor or ceiling 4 2 1 Addition Alone Connecting Surfaces If the adjacent space is not modeled an interior surface is modeled Interior surfaces are how CBECC Res that either conditioned space or an enclosed unconditioned space is on the other side of the surface and there are no solar gains An interior wall is identified as a party wall when the adjacent zone is not modeled If the connecti
128. fin to the right of the window that provides shading to the window 7 7 3 6 Distance Right Distance in feet from the right edge of the window to the right fin 7 7 3 7 Top Up Distance in feet from the top of the window to the top of the wall fin 7 7 3 8 Bottom Up Distance in feet from the bottom of the window to the bottom of the right fin 7 18 CBECC Res User Manual Building Envelope 7 74 Glass Doors For a door with 50 percent or more glass area or a door with an NFRC rating the entire door area is modeled as a window The glass area in square feet of a door with less than 50 percent glass is the sum of all glass surfaces plus two inches on all sides of the glass to account for a frame This area is modeled as a window The remaining area of the door is modeled as opaque door see Section 7 2 5 7 8 Skylights To create a skylight a section of cathedral ceiling with an area slightly larger than the skylight must be created Right click on the cathedral ceiling surface and pick lt create gt and select skylight see Figure 7 18 Figure 7 18 Skylight Envelope Mechanical Skylight Data Project 1 Story Example i Gs ER Attic 2 540 SqFt Currently Active Skylight SK 1 y E Conditioned 2 100 SqFt D i L Oe oe SE Skylight Name SK 1 Ceiling below attic Belongs to Cathedral Ceiling Cathedral Ceiling KM M Front BB F1 Skylight
129. for approving compliance software CBECC Res must also comply with the modeling requirements of the Residential Alternative Calculation Methods ACM Reference Manual which establishes the rules for the how the proposed design energy use is defined how the standard design energy budget is established and what is reported on the Certificate of Compliance CF1R CBECC Res is the 2013 Compliance Manager which is the simulation and compliance rule implementation software CBECC Res is used to model all components that affect the energy performance of the building as required for complying with the 2013 Building Energy Efficiency Standards A Certificate of Compliance CF1R signed by a documentation author and a responsible party either the building owner or designer reports all of the energy features for verification by the building enforcement agency Keywords ACM Alternative Calculation Method Building Energy Efficiency Standards California Energy Commission California Building Energy Code Compliance CBECC CBECC Res Certificate of Compliance CF1R compliance manager computer compliance energy budget energy standards energy use performance compliance public domain Title 24 Title 24 compliance software TABLE OF CONTENTS Chapter 1 Overview iii iris couerves te an a Sea aara cents cu nedenttt easier criada 1 1 1 1 Approval tele euer TE 1 1 1 2 Bea CK Grund EE 1 1 1 3 Program e currando 1 2 1 4 Software Capabilities sni
130. for a combined hydronic system rather than leaving the water heating field as none list the same device providing the space heating as the water heating system for example large storage 100 gallon water heater see Figure 9 8 Figure 9 8 Water Heating Combined Hydronic Envelope Mechanical TA Project 2 Story Example EI HVAC System Other Heat Cool E CombHydronic CombHydro Lrg 100 Gal EE No Cooling NoCooling Combined Lg 100621 lt A Heating Systems sn Cooling Systems Heat Pump Systems Distribution Systems GQ HVAC Fan Systems 9 7 1 2 Water Heating Separate If the system has a separate water heater list both the device providing space heating and the device providing water heating as shown below for example Lrg 100 Gal plus a 50 gallon gas water heater See Figure 9 9 CBECC Res User Manual Domestic Hot Water Figure 9 9 Water Heating Separate Hydronic Envelope Mechanical TH Project 2 Story Example 16 3S HVAC System Other Heat Cool E CombHydronic CombHydro Lrg 100 Gal EB No Cooling NoCooling 12 Separate Hydronic Lig 100Gal lt A Gas Storage CO Heating Systems Cooling Systems fa Heat Purnn Sweteme 9 8 Ground Source Heat Pump and Air to Water Heat Pump The water heating portion of a ground source heat pump or air to water heat pump is modeled by first defining the HVAC system as described in Section 8 2 3 and
131. g Envelope Figure 7 4 Exterior Wall Exterior Wall Data Currently Active Wall Front y Exterior Wall Name Front Belongs to Zone Conditioned z Surface Status Nw e Construction Exterior Wall Cons y Wall Area 270 0 2 Wall Tilt 90 0 deg Orientation Front y 7 2 4 1 Exterior Wall Name If the building plans use a unique tag or ID use that for the name otherwise a simple name such as front or front wall is sufficient Each name within a zone or on a surface must be unique 7 2 4 2 Belongs to Zone The name of the zone in which the wall is being modeled 7 2 4 3 Surface Status Surface status is used to identify an existing altered or new wall Any surfaces that are part of a new building or addition are new 7 2 4 4 Construction Pick one of the construction assemblies or create a new construction assembly see Section 6 10 7 2 4 5 Wall Area Gross wall area in square feet the area of windows and doors associated with the wall will be subtracted 7 24 6 Wall Tilt A wall typically has a tilt of 90 degrees but may range from greater than 60 degrees to less than 120 degrees see Figure 7 5 7 2 4 7 Orientation The plan view orientation Use front left back and right If specifying a value it is based on front being equal to 0 left is 90 back is 180 and right is 270 rather than the actual building orientation The software will add the front orientation and this plan orientation to determin
132. g source and the point of distribution e Nominal Pipe Size in The nominal as opposed to true pipe diameter in inches e Insulation Thickness in The thickness of the insulation in inches Enter none if the pipe is uninsulated e Insulation R value hr ft F Btu The installed R value of the pipe insulation Minimum pipe insulation for hydronic systems is as specified in Section 150 1 8 2 9 Wood Heating When all of the qualifications for the wood heat exceptional method are met see Residential Compliance Manual Section 4 7 7 the heating system which includes any back up heating system receives neither a penalty nor a credit A hypothetical heating system that meets Package A is modeled The wood heater and its back up system are modeled as a 78 AFUE central furnace with sealed and tested ducts located in the attic with an R value equivalent to Package A select Use all distribution system defaults 8 2 10 Non central Heating Specify the appropriate system type as electric floor furnace room heater fan type wall furnace or gravity flow wall furnace CBECC Res uses the lowest efficiency for the product type as is displayed on the screen As of April 2013 the minimum AFUE for gas heating appliances is Minimum System Type AFUE Wall furnace fan type 75 Wall furnace gravity flow 65 Floor furnace 57 Room heater 61 Assuming there is no cooling system or the cooling is also ductless model the d
133. gest area of roof 7 2 2 7 Orientation The plan view using labels front left back and right If specifying a value it is based on front 0 left 90 back 180 and right 270 If the cathedral ceiling is on a part of the building facing an angle match the orientation of the walls See Section 7 1 7 2 2 8 Solar Reflectance The default aged solar reflectance is 0 10 for all roof types Alternatively enter the aged solar reflectance for a roof product as published by the Cool Roof Rating Council CRRC www coolroofs org A higher value is better so if a specific product color is unknown use a lower value among options to avoid having to regenerate compliance documentation during construction See also Section 5 3 2 6 7 2 2 9 IR Emittance The default thermal emittance or emissivity for all roofing materials is 0 85 Alternatively enter the emittance value published by the Cool Roof Rating Council CRRC www coolroofs org See also Section 5 3 2 7 7 2 3 Knee Walls Model any knee walls a sidewall separating conditioned space from attic space under a pitched roof or where ceiling heights change as an interior wall with the outside surface as attic with insulation value typical for a wall 7 2 4 Exterior Walls Add the walls in a clockwise or counter clockwise direction and in the order you would like them to appear because it is not possible to change the order See Figure 7 4 7 4 CBECC Res User Manual Buildin
134. h R 38 R 38C R 30 R 30C R 25 R 22 R 21C R 19 R 15C R 13 R 11 2x12 11 1 4 37 38 30 2x10 9 1 4 32 35 30 30 25 2x8 7 1 4 27 30 25 27 24 22 21 19 2x6 5 1 2 21 22 20 19 21 18 2x4 3 1 2 14 15 13 15 13 11 2x3 2 1 2 11 10 8 9 2x2 1 1 2 6 6 6 2 2x1 3 4 Standard Product 12 10 1 4 9 1 2 8 1 4 8 6 3 4 5 1 2 6 1 4 3 1 2 3 1 2 3 1 2 Thickness 6 2 Assembly Types The types of assemblies that can be created in the program are Exterior wall Interior wall also used for demising walls or walls between house and garage Underground wall Attic roof Cathedral roof Ceiling below attic CBECC Res User Manual Construction Assemblies Interior ceiling Slab on Grade Exterior floor Floor over crawl space Interior floor Underground floor Also included are some typical assemblies T24 2013 exterior wall wood 2x4 T24 2013 R38 ceiling below attic T24 2013 R30 ceiling below attic T24 2013 R19 exterior floor T24 2013 R19 floor over crawl T24 2013 R15 interior wall T24 2013 R19 interior floor 6 3 Mandatory Envelope Requirements The mandatory insulation requirements Standards Section 150 0 a d for new construction are based on a wood framed assembly e Ceilings or rafter roofs with R 30 or a weighted average U factor of 0 031 formerly R 19 e Raised floor insulation with R 19 or a weighted average U factor of 0 037 formerly R 13 e Framed w
135. has 16 climate zones The climate zone can be found in the Reference Appendices Joint Appendix JA2 1 1 by looking up the city county or zip code The climate zone determines the measures that are part of the building s standard design see Section 150 1 Table 150 1 A in the Standards 1 14 7 HERS Verification Some mandatory requirements and other optional compliance features require a Home Energy Rating Systems HERS rater to perform diagnostic testing or verify the installation HERS raters are trained and certified by one of the HERS Providers For a list of currently approved providers see www energy ca gov HERS providers html HERS raters perform verification and testing requirements as specified in the Reference Appendices Residential Appendices RA1 RA4 1 8 CBECC Res User Manual Getting Started Chapter 2 Getting Started 2 1 Installing CBECC Res Click on the hyperlink for CBECC Res or copy the link into your browser s address box Follow the prompts and read accept the license agreement You can direct the software to a different drive but do not change the names of the file folders The software will create a desktop icon Figure 2 1 Setup Choose Components Choose which Features of CBECC Res 2013 you want to install PA Check the components you want to install and uncheck the components you don t want to install Click Next to continue Select the type of install Typical EN Or select the optional
136. he house from the garage see Section 6 10 6 CBECC Res can currently model wood or steel framed SIP mass straw bale and log walls advanced wall framing and underground walls 6 10 1 Interior and Exterior Wall Construction Data 6 10 1 1 Construction Name User defined name 6 11 CBECC Res User Manual Construction Assemblies 6 10 1 2 Can Assign To This is a fixed field To create a new assembly type at the zone level pick lt create gt and select the appropriate construction assembly type 6 10 1 3 Construction Type Options available include wood framed and steel framed Section 6 10 2 unframed wall types are concrete Insulated Concrete Form ICF brick hollow unit masonry adobe strawbale log Section 6 10 3 and structurally insulated panels SIPs Section 6 10 4 Figure 6 6 Wood Framed Wall Construction Data Construction Data Currently Active Construction Exterior Wall Cons E Frame H 8 876 Construction Name Exterior Wall Cons Cavity R 20 305 Exterior Walls x Frm Fetr 0 250 Construction Type Wood Framed Wall E Construction Layers inside to outside Cavity Path Frame Path Can Assign To Inside Finish Gypsum Board Gypsum Board y Sheathing Insulation no sheathing insul no sheathing insul y Cavity Frame R 15 2x4 16 in O C Sheathing Insulation no sheathing insul gt no sheathing insul Exterior Finish
137. he zone type unconditioned is not implemented To create the house or dwelling unit right click on project or edit an existing conditioned zone see Figure 5 1 5 1 1 Conditioned Zone Data Figure 5 1 Conditioned Zone Data Zone Data Currently Active Zone Conditioned Bi Name Conditioned Zone Status New y Type Conditioned El DECHE 2100 e HVAC System Hvac System 1 El Stories 1 Ceiling Height 3 ft Floor to Floor 10 ft See DHW System 1 Min Gas S Bottom 0 7 ft Win Head Height 7 67 ft DHW System 2 none E 5 1 CBECC Res User Manual Zones 5 1 1 1 Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 5 1 1 2 Zone Status The default is new for new construction or the added floor area of an addition Other options include altered and existing 5 1 1 3 Type The default zone type is conditioned If the building specifies zonal control under the building tab the type is defined as living or sleeping For more information on zonal control see Section 8 1 3 Unconditioned is not implemented as a valid zone type Any unconditioned zones can be modeled as a garage or as part of the garage see Section 5 5 5 1 1 4 Floor Area Specify the floor area of the zone 5 1 1 5 Number of Stories Enter the number of stories in the zone not the building If each
138. heating system has a solar system to provide part of the water heating the Solar Fraction SF is determined using an F chart program OG 100 or OG 300 calculation method see www gosolarcalifornia org The calculation methods require varying levels of detail about the solar system and the site of the installation Calculations use published efficiency data for the solar water heating system 9 5 CBECC Res User Manual Domestic Hot Water Figure 9 3 Solar Water Heating Data Annual Water Heating System Data Solar Water Heating Data Currently Active DHW System DHW System 1 z Solar Fraction Type Annual Annual Solar Fraction 0 40 Figure 9 4 Solar Water Heating Data Monthly Water Heating System Data Solar Water Heating Data Currently Active DHW System DHW System 1 z Solar Fraction Type Monthly Monthly Solar Fractions JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Yr O f f fF JT E 9 5 1 1 Solar Fraction Type Select annual or monthly based on the appropriate calculation method for the system type See www gosolarcalifornia org 9 5 1 2 Solar Fraction Enter one annual solar fraction see Figure 9 3 or 12 monthly solar fractions see Figure 9 4 as calculated for the system type 9 6 Water Heater Data The specifications of the water heater accessed in Figure 9 2 are contained in the water heater data as shown in Figure 9 5 The fields will vary based on the tank type 9 6
139. hedral Ceiling 6 9 1 Cathedral Ceiling Construction Data Each surface facing a different orientation will be modeled as a separate surface see Figure 7 3 and Section 7 2 2 Figure 6 5 Cathedral Ceiling Construction Data Currently Active Construction Cathedral R30 D Frame R 11 370 Construction Name Cathedral R30 Cavity R 31 931 Can Assign To Cathedral Ceilings DERE Sa Construction Type Wood Framed Ceiling D Roofing Type fall others y Construction Layers topmost to bottom Cavity Path Frame Path Roofing Light Roof Asphalt Shingle Light Roof Asphalt Shingle gt Above Deck Insulation no insulation no insulation y Cavity Frame R30 xto 2inoc dl Sheathing Insulation no sheathing insul y no sheathing nsul y o eeng S Winter Design U value 0 035 Btu h ft2 F 6 9 1 1 Construction Name User defined name 6 9 1 2 Can Assign To This is a fixed field To create a new assembly type at the zone level pick create and select the appropriate construction assembly type 6 9 1 3 Construction Type Options are wood framed built up roof steel framed not yet implemented and SIP ceiling 6 9 1 4 Roofing Type Pick the appropriate roof type as either 1 steep slope roof tile metal tile or wood shakes or 2 all other 6 10 CBECC Res User Manual Construction Assemblies 6 9 2 Cathedral Ceiling Construction Layers 6 9 2 1 Roofing The availabl
140. hen the walls are at an angle such as a bay or corner wall in which case you will specify the orientation relative to the front If there is a bay off the back of a building see Figure 7 2 the back angled walls are entered as 135 and 225 If the bay is off the front the angled walls are at 315 and 45 The software adjusts these for the energy use and as reported on the CF1R based on the front orientation entered for Building Front Orientation and will report the actual azimuth NOTE if you enter the actual orientation of walls the software models the value entered plus the building front orientation and the output will not match the proposed building If you enter the actual orientation of the walls the only way for the output to be correct would be to define the front orientation as 0 and most plan checkers will not understand why the site plan and your building front do not match Additionally to assist inspectors the CF1R report was modified to include the side of the building or plan orientation 7 1 CBECC Res User Manual Building Envelope Figure 7 2 Plan Orientation 15 4 2 14 7 PA Orientation aaa Orientation PA aaa ENE Plan Orientation COVE HD 8A 270 de SSTB3 GEN AY D o Vi 12 0 n o wo o N ll Plan Orientation 90 iu 5060 SL TEMP 12080 SL GL DOOR TEMP 7 y HPAHD22 2P 6 0 26 0 N Ir 1 Wi ee ele saan 7 2 Op
141. i awe A A ai A i A ge oe alias 7 17 Figure 7 17 WINDOW Fin dos 7 18 Figure 7 18 SKyhght iinn uri arrians ned a oi ieee a Ge ee ee ts 7 19 Figure 8 1 Mechanical Tab teen ii EE ENEE 8 1 Figure 8 2 FIVAG System Dalai aiii 8 2 Figure 8 3 Zonal Control from Section 4 5 1 9 oo ee eee eee eeeeeeeeeeeeesaeesaeesaeesaaesaaeeaeseaeseaeessaeseaeseeeseeeeeaeeeaes 8 4 Figure 8 4 Type from Section Bil 8 4 Figure 8 5 Heating System Data 8 6 FIgure 9 6 heats PUMP Dala ii italia ea iii 8 9 Figure 8 7 Air to Water Source Heat PUMP c occonccniccnconcnonocononcn conocio ronca 8 10 Figure 8 8 Mini Split Heat Pump Data 8 12 Figure 8 9 Room Heat PUMP iii e AA Aia 8 13 Figure 8 10 Hydronic Heating Data 8 14 Figure 3 11 Gooling SystemDatasiiiictiaia tii A te ee ia 8 17 Figure 8 12 No Cooling SySteM A 8 19 Figure 3 13 Distribution System Datos irte aia 8 21 Figure 8 14 Duet LAK AGS EE 8 22 ee LC E He e 8 25 EI tee D AMA da 8 26 Figure 821 73 IAQ Pati Data E E O E AE Icod EEE eo vacebaas tdawel aia ceagticwkarasserenunscecebeanaied 8 27 Figure 8 18 Cooling Ventilation cccccecceecececeeeeeeeeeeeeaeeeeeeeeceaeeecaaeeeeeeeecaaeeseaaeegeeeeseaeeesaaesseaeeseeeeessaeeesnaseseaes 8 28 Figure 3 19 GEI EixOd FloWis a A eet eee et es 8 29 Figure 8 20 CFI Variable FIOW oooncoocconcnniconconnccnnrcn rin 8 30 Figure 9 1 Single Family Distribution Systems oooonnnccincccnnnnonnccnnnncccnonnnn cnn anno cn rn cc raro nn 9 2 FlIgure 9
142. ibd Same as above with a crawl space 1StoryExample18CrawIMW ribd Same as above with a crawl space and with several wall types in the construction library including concrete ICF Log SIPs below grade mass 1StoryExample18BelowGrade ribd Same as above with a 750 ft below grade conditioned zone 1StoryExample18EvapCond ribd Same as above with an evaporatively cooled condenser 1StoryExample18HVAC ribd Same as above with mini split ground source and air to water heat pumps defined in the mechanical system library 2Story Example18CombHydNoCool ribd Based on the CEC 2700 ft two story prototype set in climate zone 3 with a combined hydronic system with a boiler as the source of heating water heating and no cooling 2StoryExample18 ribd Based on the CEC 2700 ft two story prototype set in climate zone 14 with asphalt shingle roof this file has window dimension inputs Compliance 2015 and a Photovoltaic power compliance credit 2Story2ZoneExample18 ribd Same building type as above but zoned 1st and 2nd story each with its own HVAC system 2StoryZonalExample18 Same building type as above with a zonally controlled living and sleeping zones HVAC system EAAExample18 ribd An existing plus addition input file with an existing HVAC system and an altered water heating system AAExample18 ribd An addition alone input file MFexample18 ribd An eight unit two story multi family 6960 ft two story building with each story as a s
143. ies or create a new underground wall assembly see Section 6 10 Construction assemblies are limited to concrete ICF Brick With the exception of the exterior surface which is assumed to be soil please see Section 6 10 3 for wall inputs Figure 7 7 Underground Walls Depth of bottom of wall below grade 6 00 Wall area 450 00 Construction assembly ES Mass R13 y Cancel Underground Wall Data Currently Active Wall Below Grade Walls z Underground Wall Name Below Grade Walls Belongs to Zone Conditioned Si Surface Status New y Construction ES Mass R13 x ai Wall Area 450 f2 Depth Below Grade 6 ft 7 7 CBECC Res User Manual Building Envelope 7 3 2 Garage Surfaces In addition to the surfaces separating the house from the garage which continue to be modeled as part of the conditioned zone model attached unconditioned spaces see Figure 7 8 No surface is modeled more than once so if the garage ceiling is a floor in the conditioned space zone it is not modeled in the garage zone The garage surfaces are typically not insulated and it is not necessary to model any windows Model the area and type of ceiling slab floor perimeter length is only to exterior any walls typically with R 0 insulation and the large metal roll up or wood door U factor 1 00 and the door to outside In a one story building the attic is typically shared with the conditioned space NOTE this is why the a
144. ighting Appliances IAQ Cool Vent People CAHP Run Title Additon Alone Generate Report s M PDF W Full XML Analysis Type Proposed and Standard zi Standards Yer Compliance 2015 zi any time with 2015 Federal Air Conditioning Requirements and solar credit PY System Credit Rated Power kWac Analysis Report Building Summary csv Addition Alone project Run Scope Newly Constructed as Addition fraction of Dwelling Unit 0 25 frac 10 1 Existing Building If the existing building will be modeled as part of an existing plus addition alteration analysis model the entire existing building The user has the option of specifying the status of a component as existing altered or new Deleted or removed surfaces are not modeled Section 10 2 below contains guidance for determining if a feature is altered or new The zone status is always existing even if features of the zone are altered Model an interior wall connecting the existing building to the addition 10 1 CBECC Res User Manual Additions and Alterations Specify the characteristics of all existing altered or new components for example anew window in an existing wall associated with the existing part of the building The characteristics of existing features that are not being altered can be modeled using the characteristics from the vintage table found in the Residential Manual page B 10 Features that are being altered will f
145. ile Ctrl 0 2 13 Background Colors The following background color convention is used in displaying data on the dialogs e White background available for user input e Gray background not user editable 2 14 Status Bar The status bar at the bottom of the screen provides useful information about each input field There are three panes on the status bar that provide context sensitive information This same information is displayed in the tool tips if you allow the mouse to linger over an input field 1 Input Description Pane Concise descriptions of the selected input field are displayed at the far left of the status bar 2 Input Classification Pane The next pane to the right on the status bar displays a set of labels that indicates whether an input is required optional or unavailable for input see Table 2 1 3 Data Source Pane The pane at the far right of the status bar displays a set of labels that identify the source of the information if any contained in the field This distinguishes between information that is dictated by the compliance checking process and the information entered for which you are responsible The data source labels are explained in Table 2 2 CBECC Res User Manual Getting Started Table 2 1 Input Classification Explanations TEXT DISPLAYED EXPLANATION No field selected No building data field is currently selected Input is compulsory Data is required the program ca
146. including electric resistance electric boilers and storage electric water heaters Distribution system is ducted or non ducted Efficiency Metric HSPF Floor Furnace Floor furnace Minimum AFUE 57 Distribution is ductless Efficiency Metric AFUE Room Heater Room heater Minimum AFUE 61 Distribution is ductless Efficiency Metric AFUE Wall Furnace Fan Wall furnace fan type Minimum AFUE 75 Distribution is ductless Efficiency Metric AFUE Wall Furnace Wall furnace gravity flow Minimum AFUE 65 Distribution is ductless Efficiency Gravity Metric AFUE Figure 8 5 Heating System Data Heating System Data Currently Active Heating System Heating Component 1 Name Heating Component 1 Type CntriFurnace Fuel fired central furnace y CntriFurnace Gas or oil fired central furnaces propane furnaces or heating equipment considered equivalent to a gas fired central furnace such as wood stoves that qualify for the wood heat exceptional method Gas fan type central furnaces have a minimum AFUE 78 Distribution can be gravity flow or use any of the ducted systems Efficiency Metric AFUE AFUE 78 0 8 2 2 Central Air Conditioning Heat Pumps Air Source See Figure 8 6 for heat pump system data input screen which varies slightly by equipment type 8 2 2 1 Name User defined name for the system 8 2 2 2 Type Heat pump system type see Table 8 2 8 6 CBE
147. inguishing piece of information to describe the dwelling unit 5 6 1 2 Conditioned Area The number of square feet in the one dwelling unit type being defined 5 6 1 3 Bedrooms Number of bedrooms in the dwelling unit used to establish the minimum ventilation requirements 5 6 1 4 Appliance Data The appliance information does not affect compliance with the Standards but does affect the appliances and miscellaneous energy use as reported on the CF1R Check the box to indicate if an appliance is located within a conditioned zone of the dwelling unit The fuel type choices for the clothes dryer and cooking appliances will depend on whether natural gas is available at the site as identified under the building tab 5 10 CBECC Res User Manual Zones 5 6 1 5 HVAC and Water Heating Equipment Space conditioning and water heating equipment is entered as described in Chapter 8 and 9 If multiple pieces of equipment with identical characteristics are used enter that in the count field If multiple pieces of different equipment are modeled the worst case will be assumed enter that as unique types or systems and enter the specifications under the tab called Additional HVAC and DHW Equipment Assignments As noted at the beginning of Section 5 6 keep system names as short as possible to accommodate CF1R reporting requirements 5 6 1 6 IAQ Indoor Air Quality Ventilation Used to identify that a default minimum IAQ fan is bei
148. ions 3 and 3b1 Vendors of the Alternative Calculation Methods EnergyPro version 6 3 and Right Energy Title 24 v 1 1 must integrate the CBECC Res Version 3b1 Compliance Manager Software and provide the Energy Commission with an updated copy of the software and user manual by January 1 2016 In solving these calculation errors addressing these issues does not significantly affect compliance with the 2013 Building Energy Efficiency Standards Information for obtaining CBECC Res Version 3b1 will be posted on the Energy Commission s 2013 Standards website for approved computer compliance programs www energy ca govititle24 2013standards 2013 computer prog _list html LI ROBERT P OGLESBY Executive Director Cal Code Regs Title 24 Pt 1 Ch 10 and Pt 6 also known as the California Energy Code 2 CBECC Res User Manual Appendix B CF1R Appendix B CF1R CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 1 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd el Ennen ECN INTI ET os A plans Manager Version SENO 201330685 ERREECHEN iii Seg FeR E Fet gergerpegiet SC Y Te Prost Scope Ney orra NEON INF ETT IS EREECHEN EE 20 Addition Slab Area FT INA at Glazing Percentage 14 7 COMPLIANCE RESUL
149. is made up of the heating cooling and distribution systems and a furnace fan See more in Chapter 8 Mechanical Systems 5 1 1 11 DHW System 1 Identify the name of the domestic water heating DHW system by picking a defined system or creating a new system See more in Chapter 9 Domestic Hot Water 5 1 1 12 DHW System 2 If a second water heater or water heating system has a different distribution system identify that second DHW system or enter 5 2 Multi family Dwelling Unit Zone Multi family buildings can be modeled with each floor as a separate zone or with each dwelling unit as a separate zone Two multi family example files are included with the program using the less detailed approach Both have 4 dwelling units per zone floor and one has central water heating When multi family is selected the zone data for HVAC and DHW are defined by creating the dwelling unit types see Section 5 6 The dwelling unit type is one of the inputs used to build the zone information see Figure 5 2 Figure 5 2 Dwelling Unit Data Dwelling Unit Data Currently Active Dwelling Unit DwellingUnit 1 br y Name DwellingUnit 1 br 1 unit s 1 Bdrm 8 780 ft2 per unit Dwelling Unit Type 1 bedroom B Count A Conditioned Area 780 f2 Area x Count 780 ft2 Minimum IAQ Ventilation 38 4 CFM unit Washer Zone Zone 1 Le Ls Dryer Zone Zone 1 5 2 1 1 Name This is a distinguishing piece of information to describe
150. istribution system and fan as none See Section 8 3 2 for the proper way to model no cooling 8 3 Cooling Systems The cooling system is the equipment that supplies cooled air to an HVAC System see Figure 8 11 Cooling systems are categorized according to the types shown in Table 8 3 See Table 8 4 for which measures some of which are mandatory require HERS verification 8 15 CBECC Res User Manual Descriptor Mechanical Systems Table 8 3 Cooling Equipment Cooling Equipment Reference Ductless Split Air Conditioner Split air conditioning outdoor unit that uses refrigerant to transport cooling to at least one terminal in each habitable space in the dwelling unit These include small ductless mini split and multiple split air conditioners Distribution is non ducted Efficiency metric EER Evaporative Direct Not enabled Direct evaporative cooling systems Assume minimum efficiency air conditioner The default distribution system is ducts in attic Efficiency metric SEER Evaporative Indirect Direct Not enabled Indirect direct evaporative cooling systems Assume energy efficiency ratio of 13 EER Requires air flow and media saturation effectiveness from the Energy Commission appliance directory Distribution is ducted or non ducted Efficiency metric SEER Evaporative Indirect Not enabled Indirect cooling systems The default distribution system is duct in attic evaporative cooler duct in
151. led 7 4 2 7 Floor Area Area of the floor in square feet 7 4 2 8 Floor Elevation Height above grade in feet This value must be consistent with the zone information If the bottom of the zone is 0 7 and the floor to floor height is 10 this value is 10 7 7 5 Slab Floor Slab on grade floors are modeled in conditioned spaces unconditioned spaces heated slab floors slab floors with mandatory or optional slab edge insulation floors with 20 exposed and 80 covered or some other combination of exposed and covered slab Figure 7 13 Slab Floor Data Slab Floor Data Currently Active Slab Floor Slab On Grade Floor Slab Floor Name Slab On Grade Floor Belongs to Zone Conditioned La ls Slab Floor Status New Floor Area 1 350 2 Perimeter 128 ft M Heated Slab Surface Default 80 carpeted covered 20 v M Slab Has Edge Insulation R value amp Depth R 5 8 inches 7 5 1 1 Slab Floor Name If the building plans use a unique tag or ID use that for the name Each name within a zone or on a surface must be unique 7 12 CBECC Res User Manual Building Envelope 7 5 1 2 Belongs to Zone The name of the zone in which the slab is being modeled 7 5 1 3 Slab Floor Status Select New Existing or Altered 7 5 1 4 Floor Area Area in square feet measured from the outside of the exterior surface of the zone 7 5 1 5 Perimeter Length of slab edge in feet between the
152. led under the Analysis tab in an existing plus addition analysis means the entire building existing and new must comply with the requirements found in Reference Appendices Residential Appendix RA3 5 for ceilings attics knee walls exterior walls and exterior floors It is not available as a credit for the addition only 10 1 Addition Alone To model an addition alone 1 set the run scope to Newly Constructed 2 check the box for Addition Alone and 3 set the fraction of the dwelling unit that the addition represents for example a 500 ft addition to a 1500 ft house 500 1500 500 0 25 With CBECC Res version 3b it is possible to model existing HVAC equipment as serving an addition without triggering any HERS requirements Follow the guidelines provided in Section 10 2 3 for setting the status flag 10 1 1 Qllin an Addition Alone Analysis Improved insulation quality is not allowed in an addition alone analysis 10 10 CBECC Res User Manual INDEX 2013 standards effective date oe 1 1 AC Charge toiii See Refrigerant charge ACTO dire 4 6 Addition alone ccoccccnonccinuncconnnonanonananonnoss 4 5 10 10 Addition alteratiON ococcconnnoccninonnnoninonnninnnaness 10 1 ALCL ATION ense S dire 10 6 Deleted surfaces EE 10 6 DU Ct scenarios 0 0 eee eee cesses cette ceeteeeeeeeeees 10 4 Existing building cece eee eeeeeee 10 1 HVAC scenarlOS cccoocccnnnocnncnonananccnnanonos 10 3 10 8 Patty Wall tido 10 6 Status Helds c
153. lity se sse sese r00ss10ss005110 4 7 Network Installation cccscsseseeeceeeeeteteens 2 1 INO COON Giit rie rae iii 8 18 Ait leakages isunnupp ue Ri 4 6 E e oral e natara ie 8 27 Number Of Stories niii 5 2 Open cell spray foam insulation 6 2 Orientation Building front ooocicincncoconononcnnonononcnnornrororencnnnoos 4 7 Walls sce ada da 7 1 Packages A ssastovets 1 7 Party SUT ACO cocococococononononcnrananonononcncacararoraronancnnnoos 7 6 Party wall iia 4 2 5 9 7 6 Perform analySiS usiende tae 2 4 Print CPLR EE 2 5 Project UI A 4 3 Kale 4 3 Proposed design 1 7 Proxy server settings oocococococononononarorarnrnrnrnnnnnnnns 2 3 PV System Credit 4 5 BEE 4 7 In an Addition sesonon o n 10 10 Spray foam insulation ccc 6 3 Quick Start Guide ect 2 4 Radiant barrier T E A RIN 6 4 6 7 Rafter rog esusen a ii 6 4 Raised Hoor 6 16 7 10 Crawl space Zone oooocococcncncononononcncocororanononnnoos 5 7 Over exteri Oba nataran naarn enaa 7 10 Uer garage 7 10 Refrigerant Charge cccsceseseeeeeeeeeetees 8 8 8 18 Registered CPIR En 1 4 Report manager 1 7 Restore default AA 4 2 CN 8 23 ROO ras 6 5 Above deck insulation 6 6 Aged solar reflectance nn 5 6 7 4 Cathedral ceiling een 6 4 E e E o E rise 5 7 Ema EE 5 6 7 4 Exceptions for emittance eee 5 6 Exceptions for solar reflectance 5 6 Insulina tao nearness eas 6 7 LOW alope En 6 5 CBECC Res User Manual Mandatory neu la
154. m Other key technical staff contributors included Payam Bozorgchami Tav Commins Gary Flamm Doug Herr Rob Hudler Alan Marshall Nelson Pena Bill Pennington Maziar Shirakh PE and the Energy Commission s Web Team Dave Ashuckian Deputy Director of the Efficiency and Renewable Energy Division provided policy guidance to the Staff Pippin Brehler and Michael Levy provided legal counsel to the staff Special thanks to our key consultants including Scott Criswell Bruce Wilcox Ken Nittler Robert Scott and Jennifer Roberts ABSTRACT The 2013 Building Energy Efficiency Standards for Low Rise Residential Buildings allow compliance by either a prescriptive or performance method Performance compliance uses computer modeling software to trade off efficiency measures For example to allow more windows the designer will specify more efficient windows or to allow more west facing windows they will install a more efficient cooling system Computer performance compliance is typically the most popular compliance method because of the flexibility it provides in the building design The Energy Commission is required by the Warren Alquist Act to provide a public domain compliance program The California Building Energy Code Compliance CBECC Res software is the public domain software that will be certified by the Energy Commission in conformance with the Residential Alternative Calculation Methods ACM Approval Manual which contains the process
155. m with ducts is assumed e g no cooling mini split heat pump the software can simulate this with a user input of none 8 1 1 14 Fan Name of the HVAC fan system details of which are specified in Section 8 5 If a system type does not have a fan e g combined hydronic wall furnace or if there is no cooling system a value of none may be modeled If using central fan integrated night ventilation cooling this is the furnace fan that operates in ventilation mode 8 1 2 Multiple HVAC Systems When multiple systems of the same type serve different areas of a building it is the user s option to separately zone the systems If modeled as one system the compliance program will use the lowest efficiency When multiple systems of different equipment or fuel types serve the building each type must be modeled as a separate zone to accommodate the different equipment types When multiple systems serve the same floor area only one system can be modeled The system modeled depends on the size and types of systems If the capacity of the secondary system does not exceed 2 kW or 7 000 Btu hr and is controlled by a time limiting device of 30 minutes or less the system is considered supplemental and may be ignored Residential Compliance Manual Section 8 7 3 8 3 CBECC Res User Manual Mechanical Systems and Section 150 1 c 6 If the system does not meet these criteria the system that is modeled is the one that consumes the most T
156. mp Heat Pump Data Currently Active Heating System RoomHP gt Name RoomHP Type RoomHeatPump Heating side of non central room AC system y RoomHeatPump Heating side of non central room air conditioning systems These include small ductless split system heat pump units and packaged terminal commonly called through the wall units Distribution system shall be ductless Efficiency Metric COP Heating Performance Cooling Performance HSPF 74 ratio SEER 17 kBtu hykW Capacity Btuh EER 10 kBtuhykWy 47 F 9 000 F Use this EER in compliance analysis CFM per Ton 30 CFMiton emt 7 000 AC Charge Not Verified y Refrigerant 8 13 CBECC Res User Manual Mechanical Systems 8 2 7 Combined Hydronic and Hydronic Heating A hydronic system uses a device such as a boiler tankless or storage water heater to provide space heating or in a combined hydronic system to provide both space heating and water heating Whether the heating system is hydronic or combined hydronic define the system type from the drop down menu as CombHydro In the field labeled Combined Hydronic Water Heater specify the device that is providing the source for the space and or water heating Figure 8 10 shows a large storage 100 gallon water heater An example file included with the program 2Story Example18CombHydNoCool ribd is a combined hydronic system using a boiler Figure 8 10 Hydronic Heati
157. nUp rules Error generating model report Error evaluating ProcessResults rules Error evaluating ProposedCompliance rules Error s encountered reading building model project file Error s encountered evaluating rules required analysis to abort Unable to write compliance report file pdf or xml Error s encountered generating compliance report file pdf or xml Error setting up check of weather file hash Error evaluating CheckFileHash rules Weather file hash failed consistency check 2 11 Managing Project Files By default project files are stored at C Users lt your username gt My Documents CBECC Res 2013 Projects although this depends on where the program is installed CBECC Res User Manual Getting Started To retain a project in the most efficient manner keep the file name with extension ribd residential input building design The lt input file name gt AnalysisResults BEES xml is the file needed for uploading to the HERS provider Other files are recreated when an analysis is performed 2 12 Input Dialog Windows The attributes of each building component can be edited by opening the input dialog window for the component The dialog can be opened by double clicking on the component on the tree control using the edit option on the right mouse menu or using the edit component option on the edit menu The tree control does not appear until you have created a project description or loaded an existing project f
158. na nap a a a a a a A a AA S Aa TA eat 1 2 1 5 What s Newin Version 3B 4i5 teat iat titi ated eet Siete a da 1 2 1 6 CFA1R and Watermark AA 1 3 1 6 1 Not Useable Watena K onserer tiv cate re ai cat trivia tai 1 3 1 6 2 Mandatory MeasureS ccceesecceceeseeceeeeeeneeeeeaaeeeeeeaeeeeeeesaneeseesanseceesneeseeseneeseeseneeeenneneeeennenees 1 3 1 6 3 FORMS a e o ee 1 4 1 7 Registering the CETRO a 1 4 1 7 1 HERS Upload XME Files coi at ti ea edad aaa 1 4 1 7 2 Registration tee 1 4 1 8 Special Features and Modeling Assumptions sssessseeesseesrssiresiresrresinssrissrisstinstinstnnstnnntnnntnnnnnn nne 1 5 1 9 HERS Third Party Verification ooonnoninnnnnnnncnninncnnononnccncnncnnn nro rra 1 5 1 10 Fixed and Restricted INputs oooonncccconnnococonancconnnoncccnnnnn cnn 1 5 1 11 Preparing Basic puto iai E E ETEA AEE AS VEE TiS 1 5 1 12 Checklist for Compliance Submittal cccccccccceceeeeeeeeeceeeeeeeeeeeaaeeeeeeeceaeeesaaeseeaaeseeeeeseaeeesaeeseeeesaes 1 6 1 13 Related Publications 0 cceeccsceceeecceeeeeeceeeeeeeaeeeseeeaeeessaaaeeeeaeaaeeesaaaaeaeseeaaeesaeaaeesneaaeeeseeeaeeeeneeaeeenes 1 6 1 14 RT tun ite e KE 1 6 1 14 1 Compliance Manager vs si te rk ea i i tel raed ee a a 1 6 1 14 2 Report Manage ricci esjeccaxsancds ei detected ons eared gee eed seed Gola oe a eee 1 7 1 14 3 Proposed We EE 1 7 1 14 4 Standard DOSIG EE EE 1 7 1 14 5 Mandatory Requirements eners esne E aE E E EEEE AE AA EE EERI R 1 7
159. nally controlled and confirm that bypass ducts condition modeled matches installation 8 43 Verified Low Leakage Ducts in Conditioned Space For ducted systems the user may specify that all ducts are entirely in conditioned space and the the duct system is assumed to have no leakage and no conduction losses Systems that have all ducts entirely in conditioned space are reported on the compliance documents and this is verified by measurements showing duct leakage to outside conditions is equal to or less than 25 CFM when measured in accordance with Reference Appendices Residential Appendix RA3 8 4 4 Buried Ducts Ducts partly or completely buried under blown attic insulation also meeting the requirements for verified quality insulation installation verified duct design and duct leakage testing may take credit for increased effective duct insulation using the HERS verified credit for buried ducts The program inputs require the user to calculate a weighted average duct R value and input that value in the program 8 24 CBECC Res User Manual Mechanical Systems The duct design shall identify the segments of the duct that meet the requirements for buried ducts on the ceiling buried ducts and ducts that are enclosed in a lowered ceiling and completely covered by ceiling insulation deeply buried ducts Buried ducts shall have a minimum of R 4 2 duct insulation prior to being buried The ceiling must be level with at least 6 inch
160. nches inches inches inches Required thickness open cell R3 6 inch 3 0 3 5 4 2 5 3 5 8 6 1 6 9 8 3 10 6 inches inches inches inches inches inches inches inches inches To receive the most credit spray foam insulation may be combined with improved construction quality which is modeled at the project level see Section 4 5 1 4 and requires HERS verification Reference Appendices Residential Appendix RA3 5 6 4 1 Medium Density Closed Cell SPF Insulation The default R value for spray foam insulation with a closed cellular structure is R 5 8 per inch based on the installed nominal thickness of insulation Closed cell insulation has an installed nominal density of 1 5 to less than 2 5 pcf 6 4 2 Low Density Open Cell SPF Insulation The default R value for spray foam insulation with an open cellular structure is calculated as an R 3 6 per inch calculated based on the nominal required thickness of insulation Open cell insulation has an installed nominal density of 0 4 to 1 5 pounds per cubic foot pcf 6 5 Advanced Wall Framing Advanced wall framing AWF is applicable to wood framed walls that meet the installation criteria from Reference Appendices Joint Appendix JA 4 1 6 to reduce the amount of wood used for framing The construction technique also referred to as an advanced wall system incorporates the following construction techniques 24 inch on center framing eliminate
161. nd keep the default 78 AFUE and click lt OK gt d Now move to Cooling Unit and follow the same process picking SplitAirCond and keeping the default efficiencies and refrigerant charge settings since this example is in a hot climate we will keep the verified refrigerant charge which is a HERS verification test to avoid an energy penalty in this climate zone The 11 3 default EER does not require HERS verification A value higher than 11 3 and checking the option to M Use this EER in compliance analysis requires verification as explained in Section 8 3 1 4 Click lt OK gt e In the Distribution field follow the same procedure selecting ducts located in attic and accepting the default values a check box sets the default values based on the climate zone Click lt OK gt f Next create the Fan data Pick the Single speed furnace fan and click lt OK gt Accept the W CEM cooling value of 0 58 and click lt OK gt g You are now back at the HVAC System Data tab Click lt OK gt to return to the Zone Data Although in this exercise we will not further edit the HVAC system to do so you would access it by clicking on the Mechanical tab at the CBECC Res main screen where a tree similar to the Envelope tree appears 3 3 CBECC Res User Manual Tutorial h Next click on the drop down menu arrow at DHW System to begin defining the domestic hot water system components Pick create new DHW System and keep the default
162. ng gt Wood Siding sheathing decking y Cavity Frame no insulation y 2x4 24 in O C Inside Finish select inside finish y select inside finish Y Non Standard Spray Foam in Cavity l Radiant Barrier Exposed on the Inside Winter Design U value 0 644 Btush ft2 F 6 7 1 3 Construction Type Options are wood framed built up roof steel framed ceiling not yet implemented and SIP ceiling 6 7 1 4 Roofing Type Pick the appropriate roof type as either 1 steep slope roof tile metal tile or wood shakes or 2 all other 6 7 2 Attic Construction Layers Working from the top to the bottom of the construction layers 6 7 2 1 Roofing The available types will depend on the roofing type specified Types include light roof roof tile asphalt gravel tile heavy ballast or pavers and very heavy ballast or pavers 6 7 2 2 Above Deck Insulation If above deck insulation is shown as part of the attic details model the R1 to R60 insulation 6 7 2 3 Roof Deck The default is wood siding sheathing decking CBECC Res User Manual Construction Assemblies 6 7 2 4 Cavity Frame List the compressed R value of cavity insulation see Section 6 1 in the cavity column This is the insulation that is installed at the roof Typical insulation is modeled as part of the ceiling below attic The framing column is to indicate the size and spacing of the framing Options are 2x4 to 2x12 with 16 or 24 inch on
163. ng surface is a floor or ceiling model that interior surface by setting the field Outside which would normally be an adjacent space as the space being modeled This means both Belongs to Zone and Outside will be the same name 4 2 CBECC Res User Manual Project 4 3 Project Information Figure 4 1 Project Information Project Analysis Building Dwelling Units Lighting Appliances IAQ Cool Vent People CAHP Project Name 1 Story Example Rev 14 Building Address 1516 Ninth St City State Sacramento CA Zip Code 95814 Climate Zone CZ12 Sacramento I 4 3 1 1 Project Name The project name is user defined project information that will appear as the first piece of general information on the CF1R 4 3 1 2 Building Address Enter a building address APN or legal description to identify the location of the proposed building project 4 3 1 3 City State Enter the city or town in which the proposed building is located 4 3 1 4 Zip Code The zip code is used to establish the correct climate zone 4 3 1 5 Climate Zone Use the zip code and Reference Appendices JA2 1 1 to determine the correct climate zone 4 4 Analysis Figure 4 2 Analysis Information Project Analysis Building Dwelling Units Lighting Appliances IAQ Cool Vent People CAHP CMFNH Run Title 2015 Prescriptive for CTZ 12 Generate Report s M PDF J Full XML Analysis Type Proposed and Standard
164. ng Data Heating System Data Currently Active Heating System CornbHydronic 2 Name CombHydronic Type CombHydro Water heating system can be gas storage y ICombHydro Water heating system can be storage gas StoGas LgStoGas storage electric StoElec or heat pump water heaters StoHP Distribution systems can be Radiant Baseboard or any of the ducted systems and can be used with any of the terminal units FanCoil RadiantFlr Baseboard and FanCony Sizing Factor 2 ratio Combined Hydronic Water Heater Lrg 100 Gal gt lt NOTE For the water heating system define a system using the same water heating device such as the large water heater shown in the figure above if the system provides both space and water heating combined If there is a separate water heater list both devices in the DHW system see Section 9 7 8 2 8 Hydronic Distribution Systems and Terminals The only combined hydronic systems currently implemented are those that have 10 feet or less of piping in unconditioned space When hydronic systems have more than 10 feet of piping plan view located in unconditioned space additional information about the distribution system is needed Other information reported includes 8 14 CBECC Res User Manual Mechanical Systems e Piping Run Length ft The length plan view of distribution pipe located in unconditioned space in feet between the primary heating coolin
165. ng used or another method of meeting the mandatory ventilation requirement Required minimum IAQ ventilation in CFM dwelling unit is displayed based on conditioned floor area and number of bedrooms CBECC Res User Manual Construction Assemblies Chapter 6 Construction Assemblies CBECC Res does not use the assembly U factors from the Reference Appendices Joint Appendix 4 Instead assemblies are created inside the program As you build an assembly the screen displays a U factor and R value only as a guide for the user to see how the assembly compares to the standard design assembly Standards Section 150 1 c Table 150 1 A Package A Model the closest insulation R value without exceeding the product s R value The U factor is not reported on the CF1R Only the insulation R values and construction details are reported In addition to typical wood frame construction CBECC Res can model wood framed walls with advanced wall framing AWF steel frame wall construction concrete masonry insulated concrete form ICF brick below grade log strawbale and structurally insulated panels SIPs It does not yet model steel framed ceilings and floors 6 1 Cavity R Value When completing assemblies use the compressed product R value for the cavity space Table 6 1 Table 6 1 Compressed Insulation R values Nominal Compressed R value Inside Cavity for Product Rated as Lumber Cavity Size Dept
166. nit increase the size of the single garage zone to have the area and all the surfaces of all the garages combined 5 5 1 1 Party Walls For multi family building party walls between the conditioned zones check the Different Dwelling Unit on Other Side for each of those walls and floors When modeling an interior surface adjacent to a space that is not being modeled e g an addition alone model the interior surface as a party wall 5 5 2 Garage Zone Data Figure 5 6 Garage Zone Data Garage Data Garage Name Garage Area 440 f2 Volume 3 960 3 Bottom 0 67 ft 5 5 2 1 Garage Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 5 5 2 2 Area The area of the garage or unconditioned space in square feet ft 5 5 2 3 Volume Volume of the space in cubic feet ft The program defaults the volume based on the average ceiling height defined for the conditioned zone 5 5 2 4 Bottom Floor elevation or distance above grade of the surface of the floor in feet This can be a negative value for surfaces below grade 5 6 Dwelling Unit Types NOTE When defining the space conditioning system please use short descriptive names In order to meet the reporting requirements needed by HERS Raters for each dwelling unit the report created by the software uses a combination of the heating cooling distribution and f
167. nnot perform a compliance analysis without this input Input is required Data is required if the field is applicable to your project Input is optional If applicable to your project you may enter a value a default value is always acceptable Input is Critical Default You may overwrite the data with a more appropriate entry You must be prepared to provide documentation substantiating the input value Field is not editable The data in this field cannot be edited either because it is defined by the compliance ruleset is not applicable to the selected compliance ruleset or is an intermediate calculated parameter Navigation input The purpose of the selected field is to enable you to select a component for editing without having to exit the current component and choose the next component from the tree Table 2 2 Data Source Explanations TEXT DISPLAYED EXPLANATION No field selected No building data field is currently selected Value from user The data shown is defined by the user either by direct input or through a wizard selection Value from simulation The data shown is defined by an energy simulation Value undefined No data is defined for the field Value from program The data in this field is defined by the program either to implement requirements and procedures specified in the Standards or to conform to building energy modeling conventions
168. nt 1 Vv 1 CntrlFurnace unit s AFUE 80 0 lv Cooling Pa Unique Cooling Unit Types Cooling Unit Split 14 12 3 Count 1 q 1 SplitAirCond unit s 14 0 SEER 12 0 EER 350 0 CFM ton lv Distribution Attic Default y Fan HVAC Fan System z Cooling Yent Fixed Flow H A Fixed Flow 1 050 CFM Watts CFM 0 53 WICFM 8 7 3 CFI Variable Speed For central fan integrated CFI night ventilation variable speed e g Night Breeze select CFI central fan integrated Cool Vent on the Cool Vent tab see Section 4 8 Define the HVAC System Type Section 8 1 1 2 as a variable outdoor air ventilation system This will reveal additional fields for defining the cooling ventilation system see Figure 8 20 The inputs are described above in Sections 8 1 1 9 through 8 1 1 12 8 29 CBECC Res User Manual System Name co gt eae Heating Cooling Distribution Fan _ gt ee Figure 8 20 CFI Variable Flow Currently Active HVAC System Hvac System HVAC System 1 Unique Heating Unit Types d d 1 Unique Cooling Unit Types H Vv Heating Unit E Variable Outdoor Air Ventilation Central Heat Cool System y HVAC System Data Heating Equipment Cooling Equipment Heat Pump Equipment Area Served 2 100 1 story Mechanical Systems Furn 80 La 1 CntriFurnace unit s AFUE 80 0 Cooling Unit 1 SplitAirCond unit s 14
169. o EER for the proposed equipment The minimum efficiency is 8 5 EER Check the box M Use this EER in compliance analysis 8 3 5 4 AC Charge Select Not Verified for this equipment type 8 3 6 Evaporative Cooling NOT YET IMPLEMENTED Specify one of three types of evaporative cooling 1 direct evaporative cooler the most commonly available system type 2 indirect or 3 indirect direct Product specifications and other modeling details are found in the Energy Commission s appliance directory for evaporative cooling including the evaporative cooling system type and efficiency The default system type is evaporative direct which is assigned an efficiency of 13 SEER or the minimum appliance efficiency standard for split system cooling For indirect or indirect direct select the appropriate type based on the Energy Commission appliance directory as well as the air flow and media saturation effectiveness or cooling effectiveness from the Energy Commission appliance directory and specify 13 EER if required input 13 SEER as well 8 20 CBECC Res User Manual Mechanical Systems Direct evaporative coolers are assumed to be equivalent to a minimum split system air conditioner The evaporative cooling modeling methodology addresses two performance issues 1 rising indoor relative humidity during periods with extended cooler operation and 2 evaporative cooler capacity limitations Since modeling of indoor air moisture levels is bey
170. occupancy group or is a multi family building R 1 or R 2 occupancy group with three stories or less NOTE A duplex or townhome must be modeled with each dwelling unit as a separate input file rather than the building For more on modeling a multi family building see Sections 5 2 and 5 6 4 5 1 7 Number of Bedrooms For single family dwellings indicate the number of bedrooms to establish mechanical ventilation requirements and determine if a building qualifies as a compact building for purposes of incentive programs 4 5 1 8 Natural Gas Availability Check the box if natural gas is available at the building site The field does not indicate what fuel type is being used in the building for heating cooling or water heating Whether natural gas is available determines the fuel type used as the basis for time dependent value TDV in the standard design see Reference Appendices Joint Appendix JA3 4 7 CBECC Res User Manual Project 4 5 1 9 Zonal Control Checking this box enables modeling a building that meets the criteria for zonal control requirements of the heating system including separately modeled living and sleeping zones This compliance option is not available with heat pump or combined hydronic space conditioning Zonal control credit requires compliance with several eligibility criteria see Residential Compliance Manual Chapter 4 Section 4 5 2 for the complete list This credit requires that the living and sleeping area
171. ocinado ebria 10 2 Surface status 10 2 Water heating scenarios cicicicinonononoso 10 4 10 9 Aggregate roof default 5 7 Air leakage EE 4 6 Air to water heat pump HVAC inputs ett n s 8 9 Water heating inputs ccc 9 10 Airflow CEMO mocccccccoccncncononononcncororororoncncnonoos 8 18 Alteration alone siie i 10 1 Appliance directory moomocococonincnnononcncnnnroronncncnonros 9 1 Appliance energy use Mulle tia 5 10 Single family ooooonicincncncononnncnnonononcncnrnrornnncnrnoos 4 8 Attached garager pedata raiike 4 8 AE a inated a A deet ege 5 4 6 3 EES E A TN 5 6 Conditloned TT 5 5 SECON AS 5 4 VCMT Sonnii aee KE eaS 5 5 Attic roof Terminologn 6 3 Automated default 4 2 Basements sseseseesesssesessereesoneseseese See Below Grade BELO ii 4 7 Below graderne na 7 6 Eemere ites Siete ena ee Ee eis 7 6 T i EE 7 13 EE 6 13 7 7 ZONE bottom EENEG 5 2 Blower door fest 4 6 BOOM y 6 ict an dra 5 2 Built up roof cococonononononncncnroronnonononrarararanonos 6 6 6 10 Buried ducts i tr r e R 8 25 CAPIP oao EN 2 9 4 10 Cathedral ceilng ee 6 4 7 3 Cavity RevValuevcsiccscscssssssssteesssssivhesssnsessearspvepnoten 6 1 UE EE 1 1 CBECC Res User Manual Create a Component cece eseeeeeeeseees 2 7 Error Message eoooonononcnnnnnnnonononononononanarannrnnananis 2 9 Installtng EEN 2 1 MA seront 2 2 Projectiles etc es estesassorsasessesesvevenses 2 11 Right click menu ccceesesesseseseseeeeeeeetetenens 2 6
172. oduced by CBECC Res is a Certificate of Compliance CF1R CBECC Res generates a CF1R when you check the PDF option on the Analysis tab accessible by double clicking on Project Generating a CF1R requires an internet connection The CF1R will have a watermark This Certificate of Compliance is not yet registered if HERS measures are required and if using valid software The documentation author and responsible person fields are completed during the registration process and are not program inputs See Appendix B for a sample of the CF1R For more information about the process for removing the watermark which requires registration with a HERS provider see Section 1 7 below 1 6 1 Not Useable Watermark If the watermark instead says Not useable for compliance it was generated either by using a the tools menu option Generate Draft T 24 Compliance Report rather than as part of the compliance calculations or b software that is not valid for compliance This is a security feature For a full explanation of the security features see the Frequently Asked Questions from November 20 2013 and March 18 2014 1 6 2 Mandatory Measures The Energy Commission no longer produces a Mandatory Measures MF 1R form however they are working on a document that can be used by designers to fulfill the need that the form met of having notes on the plans in advance of the installer completing the CF2R 1 3 CBECC Res User Manual Overview CBECC R
173. oling System Verifications Minimum Airflow Verified EER Refrigerant Charge HVAC Distribution System Verifications Duct Sealing Domestic Hot Water System Verifications None ENERGY DESIGN RATING This is the sum of the annual TDV energy consumption for energy use components included in the performance compliance approach for the Standard Design Building Energy Budget and the annual TDV energy consumption for lighting and components not regulated by Title 24 Part 6 such as domestic appliances and consumer electronics and accounting for the annual TDV energy offset by an on site renewable energy system PO Reference Energy Use Energy Design Rating Margin Percent Improvement includes calculated Appliances and Miscellaneous Energy Use AMEU BUILDING FEATURES INFORMATION Number of Dwelling Number of Ventilation Number of Water Project Name Conditioned Floor Area sft NENA of Bedrooms a of Zones GE a 2100 w 750 basement Example 17 2850 Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 3 of 10 Calculation Description Conditioned Basement w Wall Fu
174. ollow the guidelines found in Section 10 2 For details on how to model altered components see Section 10 5 If an existing garage is being converted to conditioned space do not model the unconditioned garage The garage is the addition because it is becoming conditioned space Figure 10 2 Existing Surface Exterior Wall Data Currently Active Wall Existing Wall Front y Exterior Wall Name Existing Wall Front Belongs to Zone Existing y Surface Status Existing Construction Wall Existing RO z Wall Area 320 f2 Wall Tilt 90 deg Orientation Front 10 2 How to Use the Status Fields The status field identifies a feature as Existing New or Altered and affects the standard design For the HVAC and DHW equipment the status needs to be set at the zone level If you find that the status is incorrect on the CF1R it is best to start over by going to the zone level set the status to the desired value and create the system from there 10 2 1 Zone Status Status for the zone is either existing or new Only characteristics of the zone are altered not the zone itself A space that was previously not supplied with space conditioning equipment is new 10 2 2 Surface Status Surfaces windows walls floors ceilings in an existing zone are either a existing if not being altered b altered with or without verified existing conditions or c new if the surface did not previously exist 10 2
175. on R value 6 0 ei F ft2 h Btu Existing R value 2 1 v F ft2 h Btu M Verified Duct Design M Has Buried Ducts Has Deeply Buried Ducts 10 5 2 3 Adding a system for the addition For the addition zone define a separate system with the system status new with the proposed conditions of the new supplemental system and duct conditions 10 5 3 Water heating If altering a water heater define the altered specifications If existing conditions were verified check the box and include the specifications of the existing equipment If the distribution system is being altered and the existing conditions are verified set the dwelling unit distribution type to an appropriate value see Section 9 3 10 9 CBECC Res User Manual Additions and Alterations If adding a water heater define both the existing water heater in the existing zone and the added water heater in the addition zone 10 5 4 Mechanical Ventilation Alterations and additions of 1 000 square feet or less are not required to meet the mechanical ventilation requirements of Section 150 0 0 10 5 5 Cooling Ventilation Whole House Fan It is not feasible to model ventilation cooling that serves only the addition Alterations and additions of 1 000 square feet or less are not required to meet the requirements of 150 1 c 12 which is part of the standard design in climate zones 8 14 10 5 6 Qllin an Existing Plus Addition Analysis Improved insulation quality mode
176. oncnononnncanc conan cnn no canaria nc 9 10 Chapter 10 Additions and Alterations onnomnnnnnnninnnniconscrcrrr rr 10 1 10 1 Gas BUIGING TEE 10 1 10 2 How to Use the Status Eiede AA 10 2 10 2 1 Zone Status c ccccononnccncnnnonnnancnncnncnno nono nocnnnnn nono nena nannan unnan ana nan EAn nena anna ana nn anna anna nn nana nan ancnncnnnos 10 2 10 2 2 Surface Stat S ems soinnin kaag ai Guede aaa 10 2 10 2 3 Space Conditioning Status cccccccceesceceeeeeceeeeeeeeeeeeeeecaeeeeaaeeeeeeeseeeesaeeeeaeesseeeesseeeeaeeseaes 10 3 10 2 4 Riet TEEN 10 4 10 2 5 Water Heating Status ooooncccnnnininncinncccnonccnnnccana nc nn 10 4 10 3 Setting the Standard DeSIQN viviana iio nie 10 5 10 3 1 Third Party Verification srianta niaaa aaa naa ia aaia aiaa 10 5 10 3 2 Efficiency Threshold WEE 10 5 VOA ele Te EE 10 6 10 5 AICPA OM EE 10 6 10 5 1 Radiant BANON seraa id 10 8 10 5 2 HVAC seersant aaka III 10 8 10 5 3 Water heating EE 10 9 10 5 4 Mechanical Ventilation cinto A Raa AARNE AANA 10 10 10 5 5 Cooling Ventilation Whole House Fan cccceeeeeeeeeeeeeeeeeeeeaeeeeeeeeaeeesaaeeseaeeseeeeeetaeeseneeee 10 10 10 5 6 QII in an Existing Plus Addition Analyse 10 10 10 1 Addition e 10 10 10 1 1 QII in an Addition Alone Analysis ccccceecceeseeeseeeeeeeeeesaeecaeecaaeeeaeesaeesaaesaeeeaeseaeeeaeenaeees 10 10 INDEX A UE e i Appendix A Resolution Approving CBECC ReS ccccscccsssccsseeeeeseeeeeeeeeseeeenseeeeseaesaseeeeaseeee
177. ond the capability of simulation models a simplified algorithm is used to prohibit evaporative cooler operation during load hours when operation is expected to contribute to uncomfortable indoor conditions The algorithm disallows cooler operation when outdoor wet bulb temperatures are 70 F or above As for the capacity limitations since evaporative coolers are 100 percent outdoor air systems their capacity is limited by the outdoor wet bulb temperature Each hour with calculated cooling load the algorithm will verify that the cooling capacity is greater than the calculated house cooling load 8 4 Distribution System Data Model the distribution system ducts associated with the HVAC system within a given zone When modeled as one system assume the worst case conditions When modeling a multi story building the computer model already assumes that some ductwork is between floors and inside the conditioned space Figure 8 13 Distribution System Data Distribution Systern Data Currently Active Distribution System Attic Default Se Name Attic Default Type I Has Bypass Duct Use defaults for all inputs below E Duct Leakage Sealed and tested z Duct Insulation R value 6 0 ei F ft2 h Btu I Verified Duct Design 8 4 1 1 Name User defined name 8 4 1 2 Type Indicate the type of duct system location or no ducts see Table 8 5 Table 8 6 summarizes the duct conditions that req
178. onditioning systems Distribution is ducted Efficiency metric SEER and EER 8 3 1 8 3 1 1 Name Cooling System Data User defined name for the cooling system 8 3 1 2 Type Cooling system type see Table 8 3 8 16 CBECC Res User Manual Mechanical Systems Figure 8 11 Cooling System Data Cooling System Data Currently Active Cooling System High SEER EER gt Name High SEER EER Type SplitAirCond Split air conditioning system X SEER 16 kBtu h kW EER 13 5 kBtuh kY M Use this EER in compliance analysis CFM per Ton 350 CFM ton F Multi Speed Compressor AC Charge Verified F Zonally Controlled Sizing Factor 1 1 ratio Lef ls Refrigerant Type R410A 8 3 1 3 SEER Cooling equipment Seasonal Energy Efficiency Ratio SEER For equipment tested only with an EER enter the EER as the SEER When a value higher than 13 SEER for Compliance 2014 is modeled it triggers a HERS Verification of High SEER With Compliance 2015 the minimum efficiency requirement of the Appliance Efficiency Standards changes to 14 SEER and only when an SEER higher than 14 is modeled is a HERS Verification of High SEER triggered Efficiency information can be obtained from the Energy Commission s appliance directories http www appliances energy ca gov AdvancedSearch aspx or from the Air Conditioning Heating and Refrigeration Institute AHRI Certified Products Directory ht
179. one Data The software automatically creates an attic zone once you define a ceiling below an attic as part of the conditioned space or garage see Figure 5 4 If a second attic zone is needed when defining the ceiling below attic in that zone select create a new attic zone 5 4 CBECC Res User Manual Zones 5 3 2 Name Figure 5 3 Attic Model Components Roof Deck Vent Vent Duct Attic if o Convection amp Radiation 5 Ceiling Ke Conduction amp Infiltration House Figure 5 4 Attic Zone Data Attic Data Attic Name Attic Area 2540 o Attic Conditioning Ventilated x Roof Rise 5 xin 12 Attic Status New z Roof Deck Surface Construction Asphalt RB Roof z Sol Reflectance 0 2 IR Emittance 0 85 User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 5 3 2 1 Attic Conditioning The conditioning type is set to ventilated typical attic Conditioned unvented attic is not yet implemented 5 3 2 2 Roof Rise Specify the roof rise or roof pitch which is the number of feet the roof rises in a span of 12 feet shown on elevations as 4 12 or 4 in 12 If there are multiple pitches you can enter the roof rise of the largest area of roof 5 5 CBECC Res User Manual Zones 5 3 2 3 Area The area is not a user input The area is derived from the
180. out the fan in this section If multiple fans are being modeled or to specify a different fan size the data shown in Figure 8 18 is needed Figure 8 18 Cooling Ventilation Cooling Ventilation Fan Data Currently Active Fan Big fan v Name Big fan F Use all fan system defaults Cooling Went CFM 10 000 0 CFM W CFM Cooling Vent 0 100 WiCFM 8 28 CBECC Res User Manual Mechanical Systems 8 7 1 1 Name User defined name which must also be specified in Section 4 8 8 7 1 2 Use all fan system defaults Sets the default minimum to 2 CFM ft2 8 7 1 3 Cooling Vent CFM If system default is not checked enter the actual CFM of the proposed ventilation fan 8 7 1 4 W CFM Cooling Vent Enter the Watts CFM of the proposed system 8 7 2 CFI Fixed Flow For central fan integrated CFI night ventilation fixed flow e g SmartVentTM select CFI central fan integrated Cool Vent on the Cool Vent tab see Section 4 8 This will reveal additional fields on the HVAC System data screen see Figure 8 19 The inputs are described above in Sections 8 1 1 9 through 8 1 1 12 Figure 8 19 CFI Fixed Flow HVAC System Data Heating Equipment Cooling Equipment Heat Pump Equipment Currently Active HVAC System Hvac System lt System Name HVAC System System Type Other Heating and Cooling System KM Area Served 2 100 1 story Heating Pa Unique Heating Unit Types Heating Unit Furn 80 Z Cou
181. ow U factor and SHGC or any other information that would be the same for all windows where this type is specified if the project requires a change of brand or grade of windows you can change the efficiencies in the types and all windows entered in the building using that type will be revised You may wish to read the explicit instructions so this flexibility is built in from the beginning see Section 6 12 e Cooling Efficiencies When minimum cooling equipment efficiencies are specified these will be updated to the new minimum efficiencies when you switch from 2014 analysis to 2015 see Section 4 4 1 5 and 8 3 1 3 e EER verified When modeling an EER for typical HVAC equipment you can accept the default EER and no verification is required If however you wish to take credit for the verified EER or a higher than default EER you will need to check the box directing the program to use the specified EER in the compliance analysis 4 1 CBECC Res User Manual Project e Duct R value When the defaults for ducts are used if you change the climate zone and the new zone has a different Package A basis the minimum will be updated e g zone 12 is based on R 6 while zone 11 is based on R 8 e Automated Defaults Based on Climate Zone When a field such as duct R value window U factor or SHGC is blue rather than red the value will update based on the default for the selected climate zone If the field is red and you wish to enable this
182. perjury under the laws of the State of California am eligible under Division 3 of the Business and Professions Code to accept responsibility forthe building design identified on this Certificate of Compliance certify that the energy features and performance specifications identified on this Certificate of Compliance conform to the requirements of Title 24 Part 1 and Part 6 of the California Code of Regulations The building design features or system design features identified on this Certificate of Compliance are consistent with the information provided on other applicable compliance documents worksheets calculations plans and specifications submitted to the enforcement agency for approval with this building permit application Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21
183. pes 1 normal vented crawl space has a conditioned space above with raised floor insulation 2 insulated with reduced ventilation as used in the Building Code or 3 sealed and mechanically ventilated crawl space also called a controlled ventilation crawl space or CVC For CVC credit installation requirements see Reference Appendices Residential Appendix RA 4 5 1 5 4 1 3 Crawl Perimeter The length in feet of the perimeter similar to the slab edge length for a slab on grade floor 5 4 1 4 Crawl Height The depth height of the crawl space in feet minimum of 2 feet The same value is used for the floor elevation and the zone bottom 5 5 Garage An attached unconditioned space is modeled as a separate unconditioned zone If the garage is not attached to the building it is not modeled When the project was defined as having an attached garage the software created an unconditioned zone see Figure 5 6 The buffering effect of this zone is modeled to accurately represent the building The walls between the house and garage are modeled as part of the conditioned space as an interior wall For details on modeling the walls ceiling slab floor and garage door see Chapter 6 Construction Assemblies and Chapter 7 Building Envelope 5 8 CBECC Res User Manual Zones When a multi family building is modeled as having an attached garage the software creates only one unconditioned garage zone To represent a garage attached to each u
184. ps Automated Features 4 1 4 2 Defining Surfaces Surrounding a Zone 4 2 4 2 1 Addition Alone Connecting Gurtaces 4 2 4 3 Project Infornare ii iei iiei veg A Eb 4 3 4 4 AE IT 4 3 4 5 SEI In DE tohginncet arta E ate edn ais E 4 6 4 5 1 S Rutten Ee EE 4 6 4 5 2 Dwelling WANS taria lanas latir 4 8 4 6 Ligning leie E ue 4 8 4 7 Le ul e EEN 4 9 4 8 Cooling Mt SS o eee eee 4 9 4 9 CAHP CMEN TEE 4 10 Chapter 5 Dee EE EEGEN SES SE 5 1 5 1 Conditioned Zones ii A a he iA E 5 1 5 1 1 Conditioned Zone Dala oococoncccnoniconocononcccnonccononana nn cnn nc cc nr nana 5 1 5 2 Multi family Dwelling Unit ZONG setepinne anina Ea N rnnnnrr 5 3 5 3 O O OE 5 4 5 3 1 Atie ZOMG Dalia R s 5 4 5 3 2 EWEN 5 5 5 3 3 8010 Bee EE 5 7 5 3 4 Low Slope Aggregate ROO Re 5 7 5 4 Crawl Spataro a ita 5 7 5 4 1 Crawl Space Zone Date EEN cia ia 5 8 5 5 Elle EE 5 8 5 5 2 Garage Zone Data EE 5 9 5 6 Dwelling Unit Types 00 ccceceecccceceeeceeeeneeceeeeneaceeeeseaaaeeeaaaaaeesaaecaeesaaaaaeesaaeaaeesaaaeeesneaaeeesseaaeesneeaeenees 5 9 Chapter 6 Construction Assemblies ooonnmninncnccinn ns 6 1 6 1 Kammer nities italien vite Adee ege ee eee el ee ene 6 1 6 2 Assembly Ty POS 6 1 6 3 Mandatory Envelope Heouremente cnn nano cnn nn nn cnn nan nn cnn anna nara 6 2 6 4 Spray Foam Insulation SPP D 6 2 6 4 1 Medium Density Closed Cell SPF Insulation ccccceeeeeeseeeeeeeeeeee esses eeeeeeseeeeeseaeeesaeeeeneeees 6 3 6 4 2 Low Density Open Cell SPF Ins
185. r Walls The outermost walls of the garage wall or unconditioned storage space which are modeled as part of an unconditioned zone typically do not have insulation see Figure 6 9 Figure 6 9 Uninsulated Exterior Wall Construction Data Currently Active Construction Garage Ext Wall y Frame R 5 051 Construction Name Garage Ext Wall Cavity R 1 480 Can Assign To Exterior Walls Y okee Aza Construction Type Wood Framed Wall gt Construction Layers inside to outside Cavity Path Frame Path Inside Finish Gypsurn Board y Gypsum Board Sheathing Insulation no sheathing insul y L no sheathing insul DI Cavity Frame no insulation zl 2x4 16 in O C ye Sheathing Insulation no sheathing insul zl no sheathing insul Z Exterior Finish 3 Coat Stucco x 3 Coat Stucco y M Non Standard Spray Foam in Cavity 6 15 CBECC Res User Manual Construction Assemblies 6 11 Floors Raised floor types that can be created include wood framed steel framed not yet implemented and SIPs over a crawl space with a crawl space zone associated with the building over exterior no crawl space or interior floor which includes a floor over garage although actually a demising surface See Figure 6 10 through Figure 6 12 Figure 6 10 Floor over crawl space Construction Data Currently Active Construction T24 2013 R19 FlrOvrCrawl Cons y Construction Name
186. r a similar project which will have the structure of the building set up However you have the option of starting with a blank project The example files included with the software are listed in Section 2 2 Once familiar with the program you can set up a file template for projects that have a library of assemblies and equipment common to your projects For example R 30 cathedral ceilings R 30 and R 38 ceilings below attic tile roofs and asphalt comp roofs with or without radiant barriers typical 2x4 and 2x6 wall construction assemblies furnaces with 80 and 92 AFUE and various water heater types and efficiencies as appropriate for your clients 4 1 Tool Tips Automated Features e Right Click The tools on the right click menu were changed recently They are described in Section 2 6 e Tool Tips Some fields have tool tips that are activated by hovering over the field e File Save If a file was not saved before you choose to perform an analysis you are prompted to save it before performing the analysis If you select the default save the file will be saved over the existing file Thus if your intention is to create a new version of the file be sure to pick lt cancel gt and select lt file gt and lt save as gt from the file menu e Window Types You can set up window types in such a way that you can easily upgrade all of the windows in a project with very few steps By creating a list of window types and entering only the wind
187. ridirectory org 8 3 1 5 CFM per Ton The mandatory minimum requirement for cooling airflow is 350 CFM ton for ducted cooling systems also assumed for dwellings with no cooling The only exception is single speed zonally controlled systems which may model a value as low as 150 CFM ton Users may model a higher airflow All systems other than no cooling require HERS verified system airflow using diagnostic testing procedures from Reference Appendices Residential Appendix RA3 8 3 1 6 AC Charge Verified refrigerant charge Select not verified verified or Charge Indicator Display CID There is no mandatory requirement for verified refrigerant charge however the standard design in climate zones 2 and 8 15 includes proper refrigerant charge in the standard design for most equipment types see Standards Section 150 1 c 8 8 3 1 7 Refrigerant Type Default R410A assumed for all refrigerant containing equipment 8 3 1 8 Multi Speed Compressor Use this field to indicate if the system is a multi speed compressor Zonally controlled multi speed compressors must meet 350 CFM ton The exception for zonally controlled single speed compressors would leave this box unchecked and specify as low as 150 CFM ton see Section 8 3 1 5 8 3 1 9 Zonally Controlled Checkbox to indicate zonally controlled cooling equipment A HERS rater will verify the modeling assumptions associated with a bypass duct CFM ton and single or mult speed compressor 8 3
188. ription data Figure 2 3 Main Screen A Untitled CBECC Res 2013 IS Edit Ruleset View Tools Help olsa ojal a aml e Envelope Mechanical re Press Alt F to Open an Existing Project 2 5 CBECC Res User Manual Getting Started 2 6 Right Click Menu Options CBECC Res makes extensive use of menus accessible by right clicking the mouse button keyboard navigation options are shown in Section 2 7 The functions available through these menus depend on whether you are on the main screen or in an input dialog window Main Screen Right Click Menu When clicked over a building component the following choices are available e Edit Opens the input dialog window for the selected component e Rename Enables renaming the selected component e Delete Deletes the selected component e Copy Copies the selected component with all of its associated children components e Paste Adds copied components and children to the selected component e Move Up in list Moves a component up in the list of the same component type e Move Down in list Moves a component down in the list of the same component type e Expand Contract Expands or contracts the list of children components shortcut key is to use the or signs e Create Enables you to create new child components for the selected component Input Dialog Right Mouse Menu When clicked over an input value in the window the following choices ar
189. rn Input File Name 1StoryExample17BelowGrade ribd ZONE INFORMATION o Ea _ Oo b Zone Floor Area Avg Ceiling Zone Name Zone Type HVAC System Name ft Height Water Heating System 1 Water Heating System 2 OPAQUE SURFACES o Window Area ft 100 56 04 207 32 56 04 Tilt deg Front Conditioned R15 R4 Stucco Wall 270 Left Conditioned R15 R4 Stucco Wall 324 50 0 Ceiling below attic 1 R38 Ceiling below attic 2100 180 GarToHouse Front Conditioned gt gt Garage Gar House R15 is a GarToHouse Left Conditioned gt gt Garage Gar House R15 lie a Floor Over Crawlspace Conditioned R19 2x6 FlrOvrCrawl He 1350 Back Conditioned R15 R4 Stucco Wall 4 i ss Jem mesas pe ep A ss Jem O mesas a pe pp ias Ja JO mesas 2 OPAQUE SURFACES Cathedral Ceilings Verified Skylight Roof Rise Existing Area ft2 x in 12 Tilt deg Condifion Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 4 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd ATTIC ee A AAN A A 10 Type Surface Orientation Azimuth Width ft ft ites
190. rs in a building if no new water heating system is being added to the existing water heating system model any status in the new zone s with none for the system name unless adding a new water heating system 10 3 Setting the Standard Design The standard design energy budget against which additions and alterations are compared will depend on 1 if the existing conditions were verified by a HERS rater prior to creating the building model and 2 whether the proposed alteration meets or exceeds a minimum efficiency threshold which may be mandatory or prescriptive See Section 150 2 of the Standards to determine whether mandatory Section 150 0 or prescriptive section 150 1 requirements establish the minimum threshold If more information is needed the Reference Manual Residential Alternative Calculation Method Reference Manual P400 2013 003 SD Section 2 11 contains detailed explanations of how each feature of the addition alteration affects the standard design 10 3 1 Third Party Verification While not required to be verified by a HERS Rater the amount of credit received for proposed alterations is based on whether the existing conditions are verified by a HERS Rater It is still feasible to comply without this added step that was introduced in the 2013 Standards For example if windows that are single pane metal frame with clear glass are replaced with dual pane wood frame Low E windows the standard design without HERS
191. s radiant electric panels or combined hydronic heating equipment Ducts located in outdoor locations Ducts located in exposed locations outdoors Verified low leakage ducts entirely in conditioned space Verified Low Leakage Ducts in Conditioned Space defined as duct systems for which air leakage to outside conditions is equal to or less than 25 CFM when measured in accordance with Reference Appendices Residential Appendix RA3 1 Ducts located in multiple places Allows a different location for supply and return ducts 8 4 1 3 Use all distribution system defaults By checking this option the detailed information about the supply and return ducts is completed based on other building inputs including climate zone NOTE If you change the climate zone to one with a different Package A duct insulation value the program will change to match Package A which may not match the plans Figure 8 14 Duct Leakage F Use defaults for all inputs below Has Bypass Duct Duct Leakage specify T e Duct Insulation R value 6 0 v F ft2 h Btu 8 4 1 4 Duct Leakage Select sealed and tested To specify a target leakage number select Low Leakage Air Handler see Figure 8 14 HERS verification is required for this mandatory measure jw Low Leakage Air Handler 8 22 CBECC Res User Manual Mechanical Systems 8 4 1 5 Duct Insulation R value Specify the R value of HVAC system ducts The mandatory minimum R valu
192. s are modeled and conditioned separately The conditioning is either with zonally controlled equipment or separate space conditioning equipment with separate thermostat settings for living and sleeping zones See Section 8 1 3 for more information on modeling zonal control CBECC Res also has modeling capabilities for zonal cooling see Section 8 3 3 4 5 1 10 Has Attached Garage This check box is used to indicate if there is an attached garage which must be modeled While there are no minimum requirements for the garage construction it is modeled to accurately represent the building to be constructed and typically improves compliance due to the buffering effects of an enclosed attached space 4 5 1 11 Central Laundry If modeling a multi family building indicate if the laundry facilities are in a central location rather than within each dwelling unit If the laundry facilities are central define the zone in which the facilities are located 4 5 2 Dwelling Units See Sections 5 2 and 5 6 4 6 Lighting Appliances For compliance with the Standards lighting is fixed The appliance information does not affect compliance with the Standards but does affect the appliances and miscellaneous energy use as reported on the CF1R For single family buildings check the box to indicate if an appliance is located within a conditioned zone of the dwelling unit The fuel type choices for the clothes dryer and cooking appliances will depend on
193. s intermediate framing for cripple and king studs uses single top plates double stud corners and in line e stack framing to maintain continuity of transferring live loads of roof framing to wall framing which allows roof sheathing and exterior siding to be installed at full widths reduces framing for connections at interior partition walls De T walls and reduces window and door header sizes 6 6 Attic Roof Terminology 6 6 1 Attic Attic is an enclosed space directly below the roof deck and above the ceiling beams The attic component of the building contains the roof and attic and any insulation that occurs at the roof deck In CBECC Res the attic is a separate zone A typical attic does not include the ceiling or ceiling 6 3 CBECC Res User Manual Construction Assemblies insulation which is modeled as part of the ceiling below attic Up to two attics can be defined in a building 6 6 2 Cathedral Ceiling A cathedral ceiling or rafter roof is modeled when there is no attic above with a ceiling below A cathedral ceiling typically has insulation installed between the rafters and may be flat or sloped The insulation is in contact with the ceiling and there is typically a one inch air gap above the insulation so that moisture can be vented Whether there is an air space required above the insulation or the entire cavity is filled with insulation with no venting is up to the local building official 6 6 3 Ceiling Below Attic
194. s may cool down enough provide an effective means of cooling the house The types of cooling ventilation are shown in Table 4 2 Additional inputs are discussed in Section 8 7 4 8 1 1 Cooling Ventilation Default value is none Other options are a default prescriptive whole house fan set to exactly 2 CFM ft specify individual fans or a central fan integrated system which uses the space conditioning duct system to provide outside air for cooling additional inputs are discussed in Chapter 8 Whole house fan operation requires that the building have an attic 4 9 CBECC Res User Manual Project Table 4 2 Cooling Ventilation Fans Measure Description Whole House Fan Traditional whole house fan is mounted in the ceiling to exhaust air from the house to the attic inducing outside air in through open windows Whole house fans are assumed to operate between dawn and 11 PM only at 25 of rated CFM to reflect manual operation of fan and windows by occupant Fans must be listed in the California Energy Commission s Whole House Fan directory If multiple fans are used enter the total CFM warrant the use of ventilation CFI Central Fan These systems use the furnace or air handler fan to deliver outdoor air to Integrated cool vent conditioned space With an automated damper outside air duct fixed or variable speed temperature sensors and controls these systems can automatically deliver filtered outdoor air to occupant se
195. saaeeeeneeseaeeeseaeseeaeeeneees 6 13 6 10 4 Below Grade WallS coil 6 13 6 10 5 Structurally Insulated Panels Gilet 6 14 6 10 6 Demising and Interior Walls noonnnnnninnnniniccnnnnccccnnnnccccnnnorcnn narrar rra 6 14 6 10 7 Garage Exterior Walls i tain devas A A dt 6 15 6 11 EOS ee ee ei ee eee ae 6 16 6 11 1 Raised Floor Construction Data 6 16 6 11 2 Raised Floor Construction Layers top to bottom 6 17 6 11 3 Floor Oyer Garage eae ran aiena iria rar 6 17 6 11 4 Slab and Below Grade Gab 6 18 6 12 Window TYPE Sanie o ites ad reo lo 6 18 Chapter 7 Building Envelope cccssccseseeeeseeeseseeeseeeensneeeeseeescaesaseeeenseeeseaesesaaesaseeeeneneeseaesesnaesasneeeeeeeseanes 7 1 7 1 Oria A a A a taa 7 1 7 2 e Ein EE 7 2 7 2 1 Ceiling bel W A AAT eA A A eth 7 2 7 2 2 Cathedral Ceiling EE 7 3 7 2 3 nee Walls ito iii 7 4 7 2 4 Exterior Walls rare lla 7 4 7 2 5 Party Walls and Surfaces seeeeeeeeeeees eiie siiesiietttttttnttttstit ttin nt nutt nn ttnn nttnnntn utuutu ntun nn nnne nnnt 7 6 7 3 Below Grade OvVervieW AEE 7 6 7 3 1 Below Grade Walls viii iaa Gear ace ple ees 7 7 7 3 2 Garage SUMAS viii etki ieee A ei iiaa 7 8 7 3 3 Opaque Doo surta aia di Eesen eeh geed 7 8 7 3 4 Garage Doors aii ied 7 9 7 4 E BEE 7 9 7 4 1 Floor over Exterior or Crawl Space ocooocccococonocononcccconccnnoncnononnnancc cnn cnn anna cnn nr aran rn nnnn ranma 7 10 7 4 2 Interior Floor Floor Over Garage 7 10 7 5 IAD IFO nati A A A A O
196. sis This will 4 4 CBECC Res User Manual Project create a file located in the My Documents CBECC Res 2013 Projects folder named lt input file name gt AnalysisResults BEES xml the xml file without BEES cannot be uploaded Although XML files are easily modified the HERS providers have in place security measures to reject files that are modified You can read more about this in the frequently asked question 4 4 1 6 PV System Credit Optional photovoltaic system PV credit is available only when Compliance 2015 is selected and only in climate zones 9 15 for single family and town house projects Compliance 2015 may be used voluntarily at any time if credit for a PV system is desired A minimum of 2 kWdc is required for the compliance credit The credit assumes updated federal cooling equipment appliance standards and is the smaller of PV Generation Rate kTDV kWdc kKWdc Max PV Cooling Credit Standard Design Cooling Energy kTDV Where the factors are shown in Table 4 1 Table 4 1 PV Credit Calculation Factors Max PV Cooling Credits of PV Generation Rate Standard Design Cooling Climate Zone kTDV kWdc kTDV ft2 09 30269 13 10 30342 15 11 29791 18 12 29556 17 13 29676 17 14 31969 16 15 29536 19 The software calculates the solar credit which is reported as a Special Feature on the CF1R Systems must meet the eligibility criteria specified in Residential Appen
197. space and that same attic is over the unconditioned space The radiant barrier is modeled as part of the attic zone construction see Section 6 7 2 7 Radiant barrier cannot be installed in a cathedral ceiling 6 4 CBECC Res User Manual Construction Assemblies 6 6 7 Roof A roof is defined as the outside cover of a building or structure including the structural supports decking and top layer that is exposed to the outside with a slope less than 60 degrees from the horizontal When Package A the basis of the standard design contains a minimum requirement for solar reflectance and emittance the values vary by roof slope A low slope roof has a ratio of rise to run or pitch of 2 in 12 or less lt 9 5 degrees from the horizontal A steep slope roof has a ratio of rise to run of greater than 2 12 gt 9 5 degrees from the horizontal Although there is no mandatory cool roof requirement these are the characteristics used to establish the standard design so there will be an energy penalty when default roof values are used 6 6 8 Steep Slope Roof A steep slope roof has a ratio of rise to run of greater than 2 12 gt 9 5 degrees from the horizontal Although a specific value is not mandatory the standard design for climate zones 10 through 15 is an aged solar reflectance of 0 20 If the roof membrane has a mass of at least 25 lb ft or the roof area incorporates integrated solar collectors the roof may assume the standard design value
198. space modeled and exterior only Do not include the length of edge that occurs between the house and garage an area that cannot be insulated if the edge is being insulated 7 5 1 6 Heated slab Check box to indicate that the slab is heated in which case mandatory insulation requirements apply See Standards Section 110 8 7 5 1 7 Surface Default 20 exposed 80 covered otherwise specify exposed or covered slab modeled separately Covered slab includes carpet cabinets and walls No building has 100 exposed slab 7 5 1 8 Slab Has Edge Insulation Check box to indicate that the slab edge will be insulated 7 5 1 9 R value amp Depth When slab edge insulation is indicated in the check box the R value and depth of the proposed slab edge insulation is identified Depth of insulation installed vertically is specified in inches Depth of insulation installed horizontally is specified in feet 7 6 Below Grade Slab When a slab floor is below grade create an underground floor by right clicking on the zone There are no edge losses for the below grade slab 7 13 CBECC Res User Manual Building Envelope Figure 7 14 Underground Floor Data Underground Floor Data Currently Active Underground Floor BG Slab bd Slab Floor Name BG Slab Belongs to Zone Conditioned Lal La Slab Floor Status New Floor Area 400 ft2 Depth Below Grade 6 ft 7 6 1 1 Slab Floor Name If the building plans use a unique
199. stallation QII Quality Installation of Spray Foam Insulation Building Envelope Air Leakage ACH 50 Pa Not Required Not Required Not Required Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFICATE OF COMPLIANCE RESIDENTIAL PERFORMANCE COMPLIANCE METHOD CF1R PRF 01 Project Name 2100 w 750 basement Example 17 Calculation Date Time 14 38 Wed Nov 26 2014 Page 7 of 10 Calculation Description Conditioned Basement w Wall Furn Input File Name 1StoryExample17BelowGrade ribd WATER HEATING SYSTEMS EN Type Distribution Type Water Heater Number of Heaters Solar Fraction WATER HEATERS Tank Exterior Tank Volume Energy Factor or Insulation Standby Loss gal Efficiency i R value Fraction Recirculation Central DHW Pipe Insulation Parallel JR a Distribution GE of Use GER GE SPACE CONDITIONING SYSTEMS SC Sys Name System Type Heating Unit Name Cooling Unit Name tS omnes ll Distribution Name Split 14 12 Furn 90 Attic Default HVAC Fan 1 1 Other Ge e Coats Split 14 12 HVAC Fan 1 Attic Default System System HVAC HEATING SYSTEMS AAA y H RO Registration Number Registration Date Time HERS Provider CA Building Energy Efficiency Standards 2013 Residential Compliance Report Version CF1R Invalid Version 685 Report Generated at 2014 11 26 14 40 21 CERTIFIC
200. sulation requirements are the same as those for air conditioner ducts Assume energy efficiency ratio of 13 EER Requires air flow and media saturation effectiveness from the Energy Commission directory Efficiency metric SEER EvapCondenser Evaporatively cooled condenser The default distribution system is duct in attic evaporatively cooled condenser duct insulation requirements are the same as those for air conditioner ducts Requires refrigerant charge testing EER verification and compliance with RA4 3 2 Efficiency metric EERa and EERb Large Package Air Conditioner Not enabled Systems rated at or above 65 000 Btu hr cooling capacity Distribution is ducted Efficiency metric EER No Cooling When the proposed building is not cooled or when cooling is optional to be installed at some future date Both the standard design and proposed design use the same default system Distribution is ducted either the same system as heating or default ducts in attic See also section 8 3 2 Efficiency metric SEER Package Air Conditioner Central packaged air conditioning systems less than 65 000 Btu hr cooling capacity Distribution is ducted Efficiency metric SEER and EER Room Air Conditioner A factory encased air conditioner that is designed as a unit for mounting in a window through a wall or as a console Distribution is non ducted Efficiency metric EER Split Air Conditioner Split air c
201. t domestic hot water Efficiency metric COP and EER Ground Source Heat Pump An indoor conditioning coil with air moving means a compressor and a refrigerant to ground heat exchanger that provides heating cooling or heating and cooling functions Also able to heat domestic hot water Efficiency metric COP EER 8 2 2 3 Heating Performance HSPF Enter the heating seasonal performance Factor HSPF Efficiency information for a specific model number is found by performing an advanced search in the Energy Commission s appliance directories http www appliances energy ca gov or from the AHRI Certified Products Directory http www ahridirectory org For systems rated with a COP only which require an HSPF convert the COP using Equation 8 1 Equation 8 1 HSPF 3 2 x COP 2 4 8 2 2 4 Capacity 47 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org Capacity is used to determine the energy use of the backup electric resistance heat In a multi family building you will indicate the capacity for the defined system and specify the number of units of that given capacity assigned to the zone see Section 8 1 1 5 8 2 2 5 Capacity 17 Degrees F Required value from the AHRI Certified Products Directory http www ahridirectory org 8 7 CBECC Res User Manual Mechanical Systems 8 2 2 6 Cooling Performance SEER Cooling equipment Seasonal Energy Efficiency
202. t comfort levels when outdoor conditions 4 8 1 2 Zone Assign to any conditioned zone that has a ceiling below an attic Since a whole house fan uses attic venting to exhaust the hot air an attic is required for this measure 4 9 CAHP CMFNH Figure 4 5 CAHP CMFNH Energy Use Details Summary CAHP CMENH CAHP Std Proposed CAHP Results Design Design End Use KTDWAZyr KTDVAyr Space Heating 7 59 53 Space Cooling 44 54 26 12 Kicker Summary Score Out Of IAQ Yentilation 1 07 1 07 Future Code Ready 0 5 Other HVAC 0 00 0 00 DOE Zero Energy Ready 0 3 Water Heating 10 81 6 98 PYV Credit 3 77 Low Use Home 5 E Compliance Total 35 71 Ultra Low Use Home 5 5 Inside Lighting 10 23 10 23 Initial CAHP Score 73 Appl amp Cooking 11 41 11 41 Final CAHP Score 63 Peak Demand kW Plug Loads 20 15 20 15 Standard Proposed Exterior 1 19 1 19 Total CAHP Incentive 3 600 2 86 2 63 TOTAL 107 00 78 69 If the project will apply for California Advanced Homes Program CAHP utility incentives first select the appropriate program from the pull down menu either single family or multi family CAHP program or PG amp E s California Multifamily New Homes Then check the appropriate options that apply to the project Electric service provided by PG amp E SCE or SDG amp E Natural gas service provided by PG amp E SCE or SDG amp E This project is applying for Future Code Preparation credit 4 10 This project is applying to be a DO
203. te Size Reflectance Reflectance Default Emittance Built Up Roofs Size 6 8 confirming to 0 50 0 48 0 85 ASTM D448 and D1863 Ballasted Roofs Size 2 4 confirming to 0 45 0 40 0 85 ASTM D448 5 4 Crawl Space The software automatically creates a crawl space zone when a floor over crawl space is defined The floor characteristics are more fully discussed in Chapter 6 Construction Assemblies The crawl space zone see Figure 5 5 is created using the area specified for the raised floor above the crawl space and the floor elevation to set the area and height of the crawl space 5 7 CBECC Res User Manual Zones Figure 5 5 Crawl Space Zone Envelope Mechanical Crawl Space Data E Project 1 Story Example BB Attic 2 540 SqFt Crawl Space Name Crawl Space Area 2 100 ft2 E Conditioned 2 100 12 Ceiling below Crawl Space Type Normal vented Front BB Left Crawl Perimeter 162 f BB Back f BB Right Crawl Height 2 ft E GarToHouse A 5 GarToHouse L fa Floor Over Cra 5 HVAC Syster bic Min Gas ff Garage 440 SqFt Crawl Space 2 100 s Construction Asse 5 4 1 Crawl Space Zone Data 5 4 1 1 Crawl Space Name User defined name If the building plans have a unique identifier that should be used here to assist in the plan checking and inspection processes 5 4 1 2 Crawl Space Type The default type and only option implemented is a vented crawl space Of the three ty
204. ted 2013 Jun 06 2013 Jun 06 2013 Jun 06 2013 Jun 06 found 51 52 Opening Project jonesl ribd 03 20 Project Saved 03 23 Performing Building Database check 03 23 Building Database check completed 0 error s spp NN NF 2 9 CBECC Res User Manual Getting Started 2013 Jun 06 12 03 23 Error Garage Garage has too few child and or adjacent surfaces 5 minimum is 6 to be simulated evaluating rule Rule 130 37 Line 10660 Check for sufficient Garage SurfaceCount 2013 Jun 06 12 03 23 ERROR Error encountered evaluating rulelist ProposedModelSimulationCheck 2013 Jun 06 12 03 27 Opening Project jonesl ribd 2013 Jun 06 12 04 16 Project Saved This identifies a problem with the garage model which does not have enough surfaces modeled It does not always require six surfaces but does need to be attached by an interior wall or floor to the house and have a floor If the ceiling is really a floor above modeled as an interior floor as part of the house zone it does not need a ceiling But if there is no floor above it needs a ceiling below attic or a cathedral ceiling Here is another example This tells that something is wrong with window areas These errors were listed several times but by looking for the differences Line it was clear there was something wrong in 4 different places 2014 Aug 01 07 39 36 ERROR Undefine
205. ten 6 2 ING Ate eiii ita ii 6 4 Pitch ssi ida 7 4 Rafter rooi RT 6 4 Raised heel Gruss cece eee e cece ceeeeeees 6 8 RASC a a it 7 4 Solar reflectantes idas 7 4 Steep Operario 6 5 ROOf CONSEFUCHON eebe nenaon 5 6 Root pito 5 5 Roof LIS aaa iaa iii 5 5 ROOM A a da 8 20 Room heat PUMP eoceccncncncncnnonononcnranarononononcnnanaoos 8 12 ROOM heater 8 15 Sample flessie seiteanna 2 1 SEER verified essu c ieat 8 17 Single family dwelling een 4 7 SIP celia ica 6 10 SIPWallS mito Dina 6 14 AA 7 19 labia 7 12 Below grade een 7 13 Covered exposed ue 7 13 Edge mmsulatton 7 13 Software updates mcccococcncncnnnconononcarinanonononcncanooos 1 2 vi Solar reflectance default 5 6 7 4 SPF Closed cell since nin A E 6 2 Default R valbues A 6 3 Non standard check bon 6 2 fe Cell sc ege deieren deeg 6 2 Verified insulation quality sse11s0s0000e 6 3 Spray foam insulation ccceseeseeeeeees See SPF Standard design oocceccnconononnnnnnonononcnnicocororarenoncnonoos 1 7 Standards documents 1 6 Standards version Compliance 2014 4 4 Compliance 2018 4 4 Status Delde een 10 2 Steep slope roof 5 7 6 5 SUPPLY duchan ai r an eenaa 8 23 S rtace EE 7 5 TOWNLOME acotado 4 7 Underground ue See Below grade Ventilation Cooling See Cooling ventilation Verified insulation quality mooninonccmmmmmmmmmm 4 7 Wall areain 2 ee eer deed 7 5 Wall furnace ntc cis 8 15 Wall orientation occicicicinnnonnnnnonanncananici
206. the conditioned zone is defined see Figure 7 1 the different components of the building envelope can be created or modified Figure 7 1 Conditioned Zone Envelope Mechanical Zone Data e Project 1 Story Example Currently Active Zone Conditioned Me BB Attic 2 540 SqFt Il Conditioned 2 100 Ceiling belo Name Conditioned Zone Status New z Front EC Type Conditioned BB F2 vi HVAC System 1 y 8 Front Floor Area 2 100 E NAC System BB Left Stories 1 BM Back Ceiling Height 9 ft Floor to Floor 10 ft ES B2 Dedo DHW System 1 Min Gas y B3 SGU Bottom 07 ft E RI Win Head Height 767 ft ei GarToHouse HB GarToH e GarToHouse DHW System 2 none y da Floor Over Cr 15 HVAC Syster Min Gas RB Garage 440 SqFt Gceil OK BM Gwall Front E H GDoor BS Gwall Left BS Gwall Right 7 1 Orientation The orientation of walls windows and any orientation other than front orientation is the plan orientation or plan view It is the view looking at the plans front left back right or as if standing outside and looking at the front of the building The numeric value for the plan view of walls and windows is the same for every building front is 0 left is 90 back is 180 and right is 270 When defining surfaces use the labels front left back and right and only specify a value w
207. the minimum cooling efficiency values will change if you used default appliance efficiency levels The standard design for Compliance 2014 is based on 13 SEER and is 14 SEER and 11 7 EER for Compliance 2015 4 4 1 4 Generate Report CF1R To generate a PDF of the Certificate of Compliance CF1R at the end of the analysis check the PDF box The PDF automatically generated when this box is checked will have a watermark identifying that the CFIR is not registered This watermark cannot be removed Once the project is uploaded to a HERS provider and signed by the appropriate responsible persons a CF1R with a registration number can be printed and submitted to the building department to obtain a building permit If the CF1R has a watermark stating that it is not useable for compliance this is an indication of one of two situations 1 the CF1R was generated via the tools option Generate Draft T 24 Compliance Report rather than as part of the compliance run as explained in the frequently asked questions this is a security feature or 2 the software is out of date To locate a previously generated CF1R the file is located in the My Documents CBECC Res 2013 Projects folder lt input file name gt AnalysisResults BEES pdf 4 4 1 5 Generate Report HERS Upload File An XML file gets uploaded to the HERS provider Once a project is ready to complete be sure to check the option to generate the full XML before performing the compliance analy
208. the run scope as Newly Constructed Click on Building and enter a description such as Single Family Residence enter the front orientation as 180 see North arrow in above figure and number of bedrooms as 2 For this example we will assume the building has natural gas and we will not model an attached garage For now we will leave the Indoor Air Quality and Cool Vent tabs alone IAQ will model an appropriately sized default exhaust fan Cool vent for example a whole house fan will be set for you based on the climate zone and the presence of an attic Click OK Either click on the save button or Select lt File gt lt Save As gt and name the file Simple House ribd Some getting around tips are that the project is called Simple House so that is the default name for the input file This name appears at the head of the project tree of the main CBECC Res screen Next we will add child components to the parent component To add components right click on the parent component and choose lt create gt and pick the type of component you wish to add 3 2 CBECC Res User Manual Tutorial 11 12 13 To edit an existing component either double click or right click and pick lt edit gt If you need to edit or check a project component address climate zone front orientation IAQ ventilation etc double click on the word project and it brings up the initial screen with the project tabs running across th
209. tp www ahridirectory org Table 8 4 Air Conditioning Measures Requiring HERS Verification Measure Description Refrigerant Charge Air cooled air conditioners and air source heat pumps must be diagnostically tested to verify that the system has the correct refrigerant charge Charge Indicator Display A Charge Indicator Display CID alternative to refrigerant charge testing System Airflow Ducted systems require a verified system airflow greater than or equal to 350 CFM ton mandatory requirement or another specified value Air handling Unit Fan To verify that fan efficacy is less than or equal to 0 58 Watts CFM a Efficacy mandatory requirement or other specified criterion EER Credit for higher than minimum EER by installation of specific air conditioner or heat pump models SEER Credit for higher than minimum SEER 8 17 CBECC Res User Manual Mechanical Systems 8 3 1 4 EER Cooling equipment Energy Efficiency Ratio EER CBECC Res has default values for the EER based on the SEER value modeled Two conditions will result in a HERS verified EER a An EER higher than the default of 11 3 for Compliance 2014 or higher than 11 7 for Compliance 2015 and b checking the box M Use this EER in compliance analysis Because the EER depends on the specific combination of coil and condenser model numbers other than default EER ratings can be obtained from AHRI directory http www ah
210. ts current name or launches the save as dialog to enable a new file name Cut Selected Item A Not enabled Copy Selected Item This button enables you to copy the selected item on the tree control along with any child components to the clipboard If the copy button is not available from within program dialogs use the keyboard equivalent Ctrl C to copy selected text Paste Contents of Clipboard D This button enables pasting components copied from the tree control to the selected location in the tree control provided that location is compatible with the stored component The Paste button is not available from within program dialogs but you can use the keyboard equivalent Ctrl V to paste text from the Windows clipboard to the selected input field Print Gi Inactive and unnecessary Once a CF1R is produced see Section 1 6 it is printed via Adobe Acrobat print options Perform Analysis This button enables launching a compliance analysis using the currently loaded building description You must save the current building description before performing the analysis About CBECC Res 2013 View program license and version information 2 5 Main Screen The main screen see Figure 2 3 is used for editing building descriptions There are two tabs at the top of the main screen Envelope and Mechanical These tabs provide different views of the building description and provide access to two different subsets of building desc
211. ttic area which cannot be edited is bigger than the conditioned space The surfaces that separate the house or conditioned zone from the garage are modeled with the conditioned zone as interior walls and interior floors see Sections 6 10 3 and 6 11 3 Figure 7 8 Attached Garage Garage modeled as an unconditioned zone w walls slab roof and metal roll up or wood door 7 3 3 Opaque Doors Figure 7 9 Opaque Door Door Data Currently Active Door Front Dr z Door Name Front Dr Belongs to Exterior Wall Front Door Status New y Door Area 20 ft2 U factor 0 5 Btuh ft2 F 7 8 CBECC Res User Manual Building Envelope Doors and windows fenestration are modeled separately For doors with glass first determine if only part of the door or the entire door is a window When a door is less than 50 percent glass calculate the glass area plus two inches on all sides to account for a frame and model that as window see Section 7 7 1 The opaque area of the door is the total door area minus the calculated glass area For doors with 50 percent or more glass area see Section 7 7 4 The standard design building has the same area of opaque door as the proposed design building 7 3 3 1 Door Name User defined name If the plans use a door schedule or unique identifier that identifier can be used for the door name Each surface must have a unique name 7 3 3 2 Belongs to Ext
212. two 3 0 3 0 windows and a 5 0 6 8 sliding glass door with insulated glazing CBECC Res User Manual Tutorial To model this home 1 10 Download install and start the CBECC Res program The program can be downloaded from www bwilcox com BEES BEES html At the opening main screen dialog box activate the button Start with a Blank Project and click lt OK gt Right click on the Press Alt F text line Choose create project from the drop down menu and enter the project name Simple House and click lt OK gt Next you will pick the climate zone Select Zone 12 Sacramento You can select any climate zone however program defaults are based on Package A so your results for this tutorial may be different You will now be at the Project tab of the building model data The name Simple House is filled in and becomes the default name for the input file Enter the address 1450 20th St Sacramento CA 95811 lt Select gt CZ12 Sacramento Rather than clicking OK which will take you out of the building model data click the Analysis tab to enter a run title which is a field for your own notes or project information such as a compliance variable e g w tankless water heater The information will appear on the CF1R as Calculation Description Check the box to Generate Report s Kl PDF note the Full XML box generates the file that will get uploaded to the HERS provider Keep
213. types een 8 7 Heated aah ue 7 13 Heating equipment types mmccccocococononnnoncnnncncnnnns 8 6 Heating sytem COP to HSPF equation cccccccceeeeseees 8 7 HERS Re ee aims laica 1 4 1 8 Registering CHIR 1 4 HERS registration File for upload ee 1 4 4 5 HERS Verification Mandatory at imiopco ineditos dicto 1 4 High quality insulation ocininioconononrnnrorononcooo 4 7 In an addition ccccccccccnnnnonananinininoninonononanans 10 10 HVAC Different efficiencies ee 8 3 Different equipment types ss ses1ss1ss r110 5 1 Different fuel types en 8 3 Multiple duct conditi0WS en 5 1 Multiple systems en 8 3 Supplemental heat 8 3 Zonal control seserorine 5 1 HVAC Equipment Status Delde si ernir nr E 10 3 HVAC Syste E 5 3 HVAC system Iepe 8 1 Hydronic heating een 8 14 Hydronic separate indoor air quality ventilation Multi family esseni ainan 5 11 Indoor air quality ventilation Single Goamilw en 4 9 A eats 4 6 EEE E 2 1 Insulation quality ee 4 7 Interior Ceiling EE 6 7 Interior SUT AcesS EE 4 2 Knee Wall cia ias 6 4 6 15 7 4 Eog lencia iio 2 3 Low slope aggregate surface 0 cece 5 7 Low slope root 5 7 6 4 Aged solar reflectance 0 6 4 Mandatory reduirements 1 7 Minis Plica dido ge 8 1 8 12 Multi family Bedrooms tito 5 10 EK 5 11 SE 5 11 CBECC Res User Manual E E 5 11 Multi family buildtmg ue 4 7 Defining the building een 5 3 Mull ti split ariston 8 1 8 12 Natural gas availabi
214. uction assembly create a new construction Call it Wall R15 4 Pick R 15 cavity insulation and an Exterior Finish of R4 Synthetic Stucco this is the appropriate method for modeling 1 coat stucco Since the rest of the inputs are correct click lt OK gt twice c Set the Orientation to front Note if you like to model an orientation value rather than front left etc please read section 7 1 and check the CF1R before printing because whatever number you enter is added to the front orientation Leave the wall tilt as 90 And click lt OK gt d From the House repeat step b three more times for a Left Wall Back Wall and Right Wall remembering to enter the correct gross wall area 160 for left and right walls 240 for back wall and change the orientation to lt Left gt lt Back gt or lt Right gt The program will let you copy data from any of the previous Exterior Walls or you can choose none at the lt Copy Data From gt dialog box Return to the main screen by clicking lt OK gt after entering the last wall The walls are child components to the parent House zone Before creating any windows first set up the Window Types library in a manner that works for your projects For example if you use certain brands of windows on the row Window Types Right Click and pick lt Create gt Give it a name such as Operable BrandX 0 32 0 23 Picture BrandY 0 31 0 20 SGD BrandX 0 28 0 24 and set the U factor and
215. uilding Envelope 7 7 1 Window Data Right click on the wall to which you will add windows and pick lt create gt and select window The screen shown in Figure 7 15 is displayed Figure 7 15 Window Data Window Data Window Overhang Window Fins Currently Active Window B1 y Window Name B1 Belongs to Exterior Wall Back New Bi Surface Status New E Window Type FIX El Specification Method Window Dimensions required for finsfo y Je Model Window Fins and or Overhangs Window Area ar Width me Height 5f Multiplier fA NFRC U facto 03 Btuh ft2 F Solar Ht Gain Coef 0 2 Source of Ufacto SHGC NFRC x Exterior Shade Insect Screen default v 7 7 1 1 Window Name User defined name If the plans use a window schedule or unique identifier that identifier can be used for the window name Each window on a given surface must have a unique name 7 7 1 2 Belongs to Exterior Wall Defaults to the wall on which the window was created When copying window data to another zone the program changes this to the new exterior wall 7 7 1 3 Surface Status Select new altered or existing 7 7 1 4 Window Type If using a window type from the library you created select from the valid options This field can also be set to none If this field is none the window U factor and SHGC of each window is entered directly which eliminates a useful feature If the win
216. uire HERS verification including sealed and tested ducts which are a mandatory requirement Proposed HVAC systems with ducts in the crawl space or a basement must have supply registers within two feet of the floor and show the appropriate locations for the ducts Ducts in crawl space and basement can be verified by the local enforcement agency no HERS verification or duct design 8 21 CBECC Res User Manual Descriptor Mechanical Systems Table 8 5 Distribution Type Distribution Type and Location Ducts located in attic Ducts located overhead in the attic space and default condition for no cooling Ducts located in a crawl space Ducts located in crawl space Ducts located in a garage Ducts located in garage space Ducts located within the conditioned space except lt 12 lineal feet Less than 12 linear feet of duct is outside of the conditioned space Ducts located entirely in conditioned space HVAC equipment and all ducts supply and return furnace cabinet and plenums located within the conditioned space Location of ducts in conditioned space eliminates conduction losses but does not change losses due to leakage Leakage from either ducts that are not tested for leakage or from sealed ducts is modeled as leakage to outside the conditioned space Distribution system without ducts Air distribution systems without ducts such as window air conditioners wall furnaces floor furnace
217. ulation ccceccceceeeeeceeeeeeee scenes eeaeeeseaeeseaeeseeeeesaeeesaeeeeneeee 6 3 6 5 Advanced Wall Framing ere ini ios EE 6 3 6 6 Attic Root Permin lo gy erara r EEEE TE EA AEE EEEE E AE 6 3 6 6 1 PUIG seoseta ti ral a raae a EAr Seet Aaa aE Aa SA EA aSa EA E AE a aAA 6 3 6 6 2 Gathedral Ceiling inaa a a li near nds 6 4 6 6 3 Geiling Below AtliC saeia aaa TER a A aa aid a 6 4 6 6 4 tae aa alll EE ATE enee E E T TA 6 4 6 6 5 Low Slope Round ta 6 4 6 6 6 Radiant EE 6 4 6 6 7 O t E a E A E a chadutiveeeeel angie tye 6 5 6 6 8 Seen SIO PSs A ndo E o E 6 5 6 7 ATIC CONSTRUCTION estrias italia datada 6 5 6 7 1 AtIC Construction Data ito llibres bas 6 5 6 7 2 Attic Construction Layers c ooccccccinnniconiconocccnnnnnnn nana cc 6 6 6 8 Ceiling Below Attic and Interior Ceilings oooooonnnncnnnnnnnnnnonnccnnnnanncccn cerraran nara 6 7 6 8 1 Ceiling Construction Data 6 7 6 8 2 Ceiling Construction LayerS sssri neneiia iiini ii cnn nn anna 6 8 6 9 Cathedral Celinda a in ine tine it el Zeeche DEE apace 6 10 6 9 1 Cathedral Ceiling Construction Data 6 10 6 9 2 Cathedral Ceiling Construction Lavers 6 11 BAO Wallis da ae eee Soll Ae aint eee el vl eee etree 6 11 6 10 1 Interior and Exterior Wall Construction Data 6 11 6 10 2 Framed Wall Construction Layers inside to outside ceceeeceeeeeeeeeeeeeeceeeeeeeaeeeeaeeeeneeees 6 12 6 10 3 Mass or Other Unframed Walls ccccccccceeeeeeeeceeeeeeeaeeeeeaeeseneeceeeeeceaeee
218. ut the building model Read carefully the first time setting up your windows or the program will override your inputs with default values Create a library of window types using product specific values for U factor and SHGCs Even if you wish to keep the default values be sure to retype them text changes from blue to red this ensures the values will not change if you change to a climate zone with different window requirements For the greatest flexibility leave size overhang or fin fields blank and create values for products with different values such as operable fixed casement glass block doors and existing windows When creating the windows on a given wall you will specify the size and any overhang fin details 6 12 1 1 Window Name User defined name Use a brief description of the type of window 6 12 1 2 Specification Method This value can be specified when defining the individual windows in the building 6 18 CBECC Res User Manual Construction Assemblies Figure 6 13 Window Type Window Type Data Window Overhang Window Fins Currently Active Window Type sen El Window Name SGD Specification Method Overall Window Area El r Window Area ei NFRC U factor 0 3 Btuh ft2 F Solar Ht Gain Coef 0 22 Exterior Shade Insect Screen default E 6 12 1 3 Model Window Fins and or Overhangs This value can be specified when defining the individual windows in the building Check box is
219. vel see Section 5 1 1 10 The indoor air quality ventilation and cooling ventilation are defined at the project level see Sections 4 7 and 4 8 The details of these systems are contained under the mechanical tab see Figure 8 1 The information in this chapter is from the point of view of the mechanical tab Libraries of equipment can be added to an input file for any of the systems and fan types In the figure below the file has four furnaces with different efficiencies A piece of equipment is only used when it is defined as part of the HVAC system data see Figure 8 2 Figure 8 1 Mechanical Tab Envelope Mechanical E Split Min NoCooling PS Attic Default DuctsAttic 84 Min Gas Min 50 Gal Heating Systems E Cum 80 CntriFumace E Fum 90 CntriFurnace E Furn 92 CntriFurnace EB Min Furn 78 CntriFumace Cooling Systems 9 Heat Pump Systems Distribution Systems QU HVAC Fan Systems IAG Fans A Cool Vent Fans ERC HE NOTE Mini split multi split and ground source heat pumps Until an exceptional method is approved these systems are modeled as equivalent to a standard design system with no penalty and no credit 8 1 HVAC System Data The details of the HVAC system are shown in Figure 8 2 8 1 1 1 System Name User defined name 8 1 1 2 System Type Select the correct system type as 8 1 CBECC Res User Manual Mechanical Systems e Heat pump heating and cooling system e Variable
220. vely enter the default value from Standards Section 110 6 Table 110 6 B 7 7 1 13 Source of U factor SHGC The three valid sources are NFRC default or Alternate Default Fenestration Procedure ADFP A rarely used provision in the Standards is for unrated site built fenestration which requires use of Reference Appendix NA6 to calculate both the U factor and SHGC Whichever source is used the Standards require a temporary label on every window See References Appendices CEC 400 20012 005 p NA6 1 through 6 5 for further information and responsibilities associated with this calculation procedure 7 7 1 14 Exterior Shade Default bug screens for windows none for skylights 7 7 2 Window Overhang Under the Window Overhang tab see Figure 7 16 enter the overhang dimensions and position 7 7 2 1 Depth Distance the overhang projects out from the wall in feet 7 16 CBECC Res User Manual Building Envelope 7 7 2 2 Distance Up The distance as viewed from elevations from the top of the window to the bottom of the overhang in feet 7 7 2 3 Extends Left Distance in feet the overhang extends from the left edge of the window to the end of the overhang 7 7 2 4 Extends Right Distance in feet the overhang extends from the right edge of the window to the end of the overhang Figure 7 16 Overhang Window Data Window Overhang Window Fins Currently Active Window WinFrontLef D Window Overhang Dimensions amp
221. wn Fiberglass Insulation R 30 R 13 R 13 R 13 R 9 R 9 R 4 2 R 4 2 R 4 2 R 4 2 R 38 R 25 R 25 R 25 R 13 R 13 R 9 R 9 R 4 2 R 4 2 R 40 R 25 R 25 R 25 R 25 R 13 R 13 R 9 R 9 R 4 2 R 43 R 25 R 25 R 25 R 25 R 25 R 13 R 9 R 9 R 4 2 R 49 R 25 R 25 R 25 R 25 R 25 R 25 R 13 R 13 R 9 R 60 R 25 R 25 R 25 R 25 R 25 R 25 R 25 R 25 R 13 Effective Duct Insulation R value for Blown Cellulose Insulation R 30 R 9 R 4 2 R 4 2 R 4 2 R 4 2 R 4 2 R 4 2 R 4 2 R 4 2 R 38 R 15 R 15 R 9 R 9 R 4 2 R 4 2 R 4 2 R 4 2 R 4 2 R 40 R 15 R 15 R 15 R 9 R 9 R 4 2 R 4 2 R 4 2 R 4 2 R 43 R 15 R 15 R 15 R 15 R 9 R 4 2 R 4 2 R 4 2 R 4 2 R 49 R 31 R 31 R 15 R 15 R 15 R 9 R 9 R 4 2 R 4 2 R 60 R 31 R 31 R 31 R 31 R 31 R 15 R 15 R 9 R 9 8 5 HVAC Fan System The HVAC fan system moves air for the air conditioning and heating systems Figure 8 16 HVAC Fan Fan Data Currently Active Fan Central Fan y Name Central Fan Type Single Speed PSC Furnace Fan y W CFM Cooling 0 580 WiCFM 8 5 1 1 Name User defined name 8 5 1 2 Type Default single speed furnace fan 8 26 CBECC Res User Manual Mechanical Systems 8 5 1 3 Watts CFM Cooling The mandatory requirement in Section 150 0 m 13 is for an air handling unit fan efficacy less than or equal to 0 58 Watts CFM as verified by a HERS rater The alternative to HERS verification of 0 58 Watts CFM is HERS verification of a return duct design that conforms to th
222. y Standards Ver Compliance 2015 gt any time with 2015 Federal Air Conditioning Requirements and solar credit PY System Credit Rated Power kde Analysis Report Building Summary csv gt Run Scope Newly Constructed y F Addition Alone project 4 3 CBECC Res User Manual Project 4 4 1 1 Run Title Run title is a field for the software user s own notes or project information The information will not appear on the CF1R It can be used to identify information such as a compliance variable being considered e g w tankless water heater 4 4 1 2 Analysis Type The two types of analysis are proposed and standard design typical for compliance and proposed only 4 4 1 3 Standards Version Default Compliance 2015 Compliance 2014 is valid only for permit applications through December 31 2014 at which time federal appliance efficiency standards change Compliance 2015 is valid any time and required for permit applications made on or after January 1 2015 At that time new federal cooling equipment standards of 14 SEER and an EER requirement based on equipment capacity of 11 7 EER or higher take effect for simplification CBECC Res assumes 11 7 as the standard minimum EER for all equipment Compliance 2015 also allows credit for photovoltaic systems in some climate zones see 4 4 1 6 below New standards for water heating also take effect NOTE When switching between Compliance 2014 and 2015

CBECC-RES - Bruce A. Wilcox, PE

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