Working through ASHRAE 62.2
Contents
1. UNS THROUGH TRAE 62 2 A d Ma o y EA A o gt lm VO A E A W OM Ba Vo mu SO E p AVA ee Tirta AFPFITAT S O ES A Y p Y fy Y A a p ma l A d gt y Gan a A E A E 1 y A A an D a f r WEY rf EN f Y md Y WI am _ oe Y E O mM Tr 1 Y aa g E a l Wa ge j rie Y II O Wa GA We DN D A nr A Ee A wwe a y A I a W a YY ae Y y a a me w7 A as Heyoka solu A Paul H Raymer Heyoka Solutions Paul Raymer m Located on Cape Cod Massachusetts Member of HVI NESEA RESNET Member ASHRAE 62 2 SSPC HERS Rater BPI Analyst Envelope Heating and AC Heat Pump Certified Energy Star V3 certified a Residential IREC Assessor Ventilation Author of the Residential Ventilation He Handbook Heyoka Solutions 2012 62 2 What Is It National Ventilation Standard single family multifamily up to three stories and manufactured and modular buildings Considers chemical physical and biological contaminants but does not consider thermal comfort Acceptable IAQ will not necessarily be achieved even if all requirements are met Heyoka Solutions 2012 ASHRAE STANDARE Ventilation and Acceptable Indoor Air Quality i Low Rise Residential Buildings guru by on AEA ewes Ak eee Oe 10 M4 ped by Po BA Beene id A me Hl sists Seeders me stenam te e se a t t2. Appliances supply yes no NA CMA A A O CA A mae o a Living oom OJ C des No NA Heyoka Solutions 2012 J Whole acer Ventilation System Type System Choice Date System Location Balanced Exhaust only emer o o wwa 1 O IA IA ay to air handler AN Y HE YOA f a ay Y j E y edd 4 el ate Heyoka Solutions 2012 Instructions and Labeling Vie Brand Model ID Required Tot Installed Airflow Product Airflow Normal Boost moon Cil Brand Model ID Function Multi speed intermittent etc 4Q4040 Malti functior variable flow System Function amp MRU designed to exhaust air fron the bathrooms ard supply air to the Operating Notes bedrooms low speed continuous operation manual boost Req Maintenance Clean filters monthly Replace annually Heyoka Solutions 2012 r y Local Exhaust Ventilation System Type System Choice Date System Location Balanced Installed en a Exhaust only q Balanced p ea EY to air handler HE YOKA A aa Y TIPA pt n 3 Heyoka Solutions 2012 Local Exhaust Ventilation Information Location Model ID Local Exhaust Controls Location Kitchen M Bath Bath 2 Bath 3 Req Airflow Function Heyoka Solutions 2012 Installed Airflow Normal Boost eY EE OKA Y SO MITORS gt Instructions and Labeling System d
3. SOMOS Whole Building Ventilation Size the system Table 4 la Example 1400 square foot house with 2 bedrooms Requires cfm continuous ventilation Floor Area Wt O11 23 7 3edroams 6001 7500 90 gt 7500 ft 105 Heyoka Solutions 2012 Whole Building Ventilation Size the system Use the formula Luke Formula Oran E 0 01 Ag oor 7 Nbedrooms 1 Example Same 1400 square foot 2 bedroom house 1400 x 01 7 5x 24 1 144 225 Slightly lower airflow but remember that 62 2 is MINIMUM ventilation guideline It assumes 2 occupants in the master bedroom lt NENAS AA SA PEE CE E y Heyoka Solutions 2012 l X Local Exhaust Local mechanical exhaust shall be installed in each kitchen and bathroom e Removes polluted air at the source eSpot ventilation systems may be noisier than whole building ventilation systems e In some cases the fan noise is desirable Note that local exhaust can serve as all or part of whole building ventilation SN 1D haat Courtesy of eHow Inc yy SY E Heyoka Solutions 2012 r SOM CARECEN y Local Exhaust Rates Intermittent Continuous Kitchen 100 cfm 5 ACH Vented range hood required if exhaust fan flow rate is less than 5 kitchen ACH Bathroom 50 ctm PEE OA Heyoka Solutions 2012 Es SOK DOS OO O Dl Select the Equipment Whole Building Ventilation Type Select equipment with performance certified by AMC
4. Ta Blower Door Test 1200 CFM5 O TIBVYORA dolutions 2012 i Bulldings Appendix A are ee Whole Building Ventilation needed First calculate whole building ventilation 2 bedrooms ay needed from the formula adding l 3 7 5 cf 22 5 1 Number of bedrooms 1 x 7 5 cfm 3 75cm plus Square feet 100 1 cfm per 100 ft of floor area 1400 100 14 0 Total o 5 Then calculate Existing Ventilation and Deficit Req Window Existing Fan Difference Kitchen with a window and 70 cfm range hood gt EXEC Bath with a window and 25 cfm exhaust fan gt 50 20 25 na O Deficit 4 3 75 Ventilation Needed 37 5 3 75 OTE IFA Heyoka Solutions 2012 J4 SOMOS Existing Buildings Appendix A Reduce the flow with the Infiltration Credit Ya difference between measured CFM atura and 2 of the floor area CFM N value Natural Leakage CFM El 1200 U3 1200 23 2 51 7 cfm Calculate floor area x 0 02 1400 ft 0 02 1400 x 02 28 0 Difference 51 7 28 23 7 Infiltration credit 23 7 2 11 85 Ventilation to Add Ventilation Needed Infil credit 40 25 11 85 29 4 cfm Need an extra 30 cfm fan running continuously Leave existing fans in place DEVORA o Heyoka Solutions 2012 SOMOS 6 5 Airtighntness Requirements o Garages separating walls and doors must be caulked gasketed weather stripped wrapped or otherwise sealed to prevent or limit air movement o Space condition
5. y a j wA F Heyoka Solutions 2012 y Test the airflow Large vane anemometer 499 Hot wire funnel kit 235 anemometer 699 LOFLO BALOMETER Balometer 1 535 Y TEC Exhaust fan flow meter 135 3 Plus DG700 Manometer 825 Evaluation of flow hood measurements for residential register flows http epb 1bl gov publications lbnl 47382 pdf NAS OR Y Heyoka Solutions 2012 Test the airflow ed Ss Q32 Duc Tester with DM 2 gauge Duct Blaster with DG700 gt Flow Blaster with DG700 NN EVA S e ff 133 y Heyoka Solutions 2012 Other requirements Just a few other things Basically you re done But you do need to consider SD SV OA ay gt a aye i Heyoka Solutions 2012 l J Reduce the whole building flow with the Infiltration Credit If the home has had a blower door test the actual infiltration can be used to adjust the ventilation rate m CFM N Agoor X 0 02 x Y2 infiltration credit CFM is the blower door number N is calculated from the Standard 136 weather factors Agoor 18 the area of the floor i LV pS VOR a y TEP A f Heyoka Solutions 2012 Infiltration Credit m CFM N Agoor X 0 02 x Y infiltration credit m CEFM N must be greater than Ag x 0 02 H N factor 7 1 0 0508 X W factor X FlOOY factor Allentown 24 6 21 8 20 0 18 7 17 7 Erie 19 7 17 4 16 0 15 0 14 2 Ha
6. A or HVI Very quiet 1 sone or less Exhaust or Supply only ventilation Mechanically balanced ventilation Mechanically balanced ventilation with heat or energy recovery RS Y Aa aR A y y a j wA Heyoka Solutions 2012 62 2 2010 Controls Whole Building Ventilation The fan on switch on a heating or air conditioning system for systems introducing ventilation air through an HVAC system Readily accessible override control must be provided to the occupant Local exhaust fan switches and fan on switches as override controls Controls including the fan on switch of a conditioning system must be properly labeled IN y A gt A 1 AE VK a Heyoka Solutions 2012 OO 0 0 o Install it so it works Air 1s EVA n E Electrons are more forgiving me Never use duck tape OR pun MO iia TA Always choose the shortest A A straightest path to the y ae outside System must be serviceable Never never never vent into the attic Wy eo a SOMOS a Heyoka Solutions 2012 Install it so it works e In line fans are designed to drag alr through ducts e Propeller or axial fans are not good for ducts e Backdraft dampers can cut the airflow in half Heyoka Solutions 2012 Jy 4 C y a Duct Leneths AS E y A Y A we i ce J DATU m L L e
7. Maximum allowable length at different flow rates e This table assumes no elbows Deduct 15 feet of allowable duct length for each elbow e NL no limit X not allowed Any length of duct this size with assumed turns and fittings will exceed the rated pressure drop Duct Type Flex Duct Smooth Duct Fan Rating 50 Diameter 3 X 4 70 NL NL 7 amp Above NL SU 100 125 50 Maximum Length X X X 5 3 X X 105 70 39 20 NL NL 95 NL NL NL NL NL Heyoka Solutions 2012 80 X 35 NL NL 100 125 X X 5 X 9 59 NL NL NL TEO al J SIWA f A 3 Duct Leneths Table 5 3 Example Bath fan needs 50 cfm for intermittent operation Straight run no elbows and no hood up to 70 feet of 4 diameter flex should work But add two 90 degree elbows and a 90 degree flow hood 70 15 15 15 105 feet Or move up to 5 or 6 ducting Duct Type Flex Duct Smooth Duct Fan Rating SOcfm 80 100 125 50 80 100 125 Diameter Maximum Length 3 X X X X 5 X X X 4 70 3 X X 105 35 5 X NL 70 39 20 NL OD 59 NL NL 95 NL NL NL 7 amp Above NL NL NL NL NL NL NL EE OKA Y SOI ORG Ro 3 Heyoka Solutions 2012 Test the airflow The airflow required by this section is the quantity of indoor air exhausted by the ventilation system as installed and shall be measured using a flow hood flow grid or other airflow measuring device 62 2 2010 RS Y Aa 1 PEA Y
8. esigner contact name amp numbers Company Name Street City State Zip 7 Best Street Philadelphia PA 19143 Cape Email LOM Lb te Ventilation Design COM Installing contractor contact name amp numbers Big Mike Fans Company Name Contact Person Mike Moose Newman Street City State Lip 72 Man St Philadelphia FA 19743 Office phone 555 555 1237 Cell Phone 555 555 1238 Heyoka Solutions 2012 y Equipment Notes Couple more things about equipment XD HS YOHA w y A r Heyoka Solutions 2012 l Equipment m HVI testing Home Ventilating Institute 920 Product Performance Certification Procedure Including Verification and Challenge and HVI915 Procedure for Loudness Rating of Residential Fan Products Sema ERTIFIED NENA AA pS VOR E y ie f Y Heyoka Solutions 2012 SOMO NON VA aC 1 Select the whole building ventilation rate based on Table 4 1 a Or you could use the formula b Ifit s an existing building you could use Appendix A to get credit for existing fans and windows c You could reduce the flow a bit more by calculating the infiltration credit 2 Select the local exhaust fans continuous or intermittent a You could use the whole building fan to satisfy both Yo Heyoka Solutions 2012 How nara can it be 2 Select the local exhaust fans continuous or intermittent a You could use the whole building fan to sati
9. he occupant Controls shall be labeled as to their function unless that function is obvious such as toilet exhaust fan switches lt VIE ZO A pS VOR is Heyoka Solutions 2012 4 Instructions and Labeling Information package should include v Design parameters including v ventilation calculations heating cooling load energy calculations safety calculations permit documentation approach being used operating schedule v Mechanical ventilation equipment information including Y operation maintenance and installation owner s manuals v make model size and supplier for all equipment v electrical requirements Y emergency contact names and numbers Heyoka Solutions 2012 y Instructions and Labeling Information package should include v Natural and passive devices v operation maintenance and installation owner s manuals v make model size and supplier for all equipment v Limitations on the acceptability of IAQ if natural ventilation devices are not operated as intended v Control equipment information including Y operation maintenance and installation owner s manuals v make model size and supplier for all equipment v control strategy Heyoka Solutions 2012 y Instructions and Labeling System Design of Bedrooms 1 Whole Building CFM Combustion CFM 15 cfm 100 square feet 270 ofn Threshold Cat 1 Combustion Location Installed outdoor air
10. ing ducts HVAC systems that include air handlers or ducts located outside the pressure boundary shall have total duct leakage of no more than 6 of total fan flow when measured at 0 1 in w c 25 Pa A Y Pa gt A Si A y y a j wA F Heyoka Solutions 2012 y 6 1 1 Multifamily buildings m All doors between dwelling units and common hallways shall be gasketed or made substantially airtight with weather stripping we LEAL A 7 pS VOR a y F P j f Heyoka Solutions 2012 y 6 4 Combustion and solid fuel burning appliances m Combustion and solid fuel burning appliances must be provided with adequate combustion and ventilation air the total net exhaust flow of the two largest exhaust fans shall not exceed 15 cfm 100 ft of occupiable space when i in operation ats oa capacity F Sy AS YOKA yy Se ated ORA Heyoka Solutions 2012 l X Combustion and solid fuel burning appliances Example 1400 ft house with a fireplace and a 270 cfm range hood 1400 100 14 14 x 15 cfm 210 cfm 270 cfm gt 210 cfm Reduce the airflow install a different range hood or provide compensating outdoor airflow SV tah J Heyoka Solutions 2012 6 2 Instructions and Labeling m Information on the ventilation design and or ventilation systems installed instructions on Operation and detailing any required maintenance shall be provided to the owner and t
11. om amp y Pe peo ee 4 ea peer dd ewes Rees sl rm sap oa The am meree mre be oe eed A PITA ae ar Ot bees rn f te q 129 2119 4 tri sett te ous owe OL gt REFRIGERATING AND AIR CONDITIONING ENGINEERS INC Irai Gee yee Of Ena Ed 110 62 2 What Is It m Requires whole building ventilation in all new and the majority of existing homes Provides sizing procedures Requires installed system testing Outlines equipment parameters Requires local exhaust ventilation in bathrooms and kitchens in all homes Provides sizing procedures Requires installed system testing Outlines equipment parameters AS Y Pal gt UR 1 PEA Y y Ea 5 Heyoka Solutions 2012 Y 62 2 What Is It Requires interaction with adjacent spaces to be limited Requires non interference with atmospherically vented combustion appliances Requires the system and its design to be documented for the building and the occupants N T ENA A 1 AE VK a i Heyoka Solutions 2012 y 62 2 What Is It Here it is ina nutshell Select a whole building airflow from the table or calculate it Select appropriate airflow rates for local exhaust Select quiet equipment whose performance is certified by HVI Install it so it works 719 Test it to prove that it works w Tow hard can it be Edward Brannock Pilot amp Entrepreneur y PEE VI KG Heyoka Solutions 2012 Le
12. rrisburg 259 DES 21 0 19 7 18 6 Philadelphia 20 5 18 8 17 6 16 7 Pittsburgh 22 20 5 18 8 17 6 16 7 Pennsylvania N Factors calculated from Standard 136 j PENO Heyoka Solutions 2012 y SOM TORS Whole Building Ventilation Size the system Example 1400 square foot 2 bedroom house Located in Philadelphia Measured CFM 1200 SW VEVO Heyoka Solutions 2012 yy Wi ONS Infiltration Credit Example m 2 Bedroom 1400 square foot single story house in Philadelphia 1200 CFM 1400 Square feet 100 22 5 cfm 14 cfm 36 5 cfm Total whole building airflow req from 62 2 formula Blower Door 1200 CEM N 23 2 1200 23 2 51 7 cfm 1400 square feet X 0 02 1500 x 0 02 28 DIN BAS ee 36 5 11 8 25 cfm Infiltration credit Fan airflow 0 01Aregagioor 7 5 Npr 1 na me Heyoka Solutions 2012 Y Adjust the whole building flow in Existing Buildings Appendix A Gives credit for existing fans and operable windows and infiltration Rather than replace existing underpowered fans increase the whole building rate and leave the fans in place EON ENVIA A jA Yi J fa Heyoka Solutions 2012 y Existing Buildings Appendix A Modified whole building ventilation rate is the sum of the whole building rate from Table 4 1 plus any deficit for existing underpowered local exhaust fans minus an infiltration credit 1 Get the required airflow from the
13. sfy both 3 Install them right gotta do that way anyway a Make sure the air is moving to and from outside the building 4 Document the system and inform the homeowner what it s for and how important it 1S Y a ee VAs E al Heyoka Solutions 2012 LG SOORA ASHRAE 62 2 Resources www ASHRAE org 62 2 User s Manual available through Resources amp Publications 54 00 Detailed step by step user guide through the Standard ASHRAE Guideline 24 2008 54 00 Beyond the Standard details on IAQ commissioning and documenting Residential Ventilation Handbook Paul H Raymer McGraw Hill 2010 52 45 62 2 System Checklist Infiltration Credit amp Existing Homes Credit spreadsheet System Documentation Sheet www HeyokaSolutions com w LENVA EA pS VOR a y ty Heyoka Solutions 2012 Le and that s the name of that tune Residential Ventilation VENTILATION TO IMPROVE Y INOGOR AIR QUALITY Read the book wWww He y okaSolutions com Don t wait for the movie Go to HeyokaSolutions com Tools we use Worksheets and Checklists Paul Raymer For Auditor Inspector Checklist paul raymer heysol com Ventilation System Documentation Form ASHRAE 62 2 Whole Building Ventilation Calculation Sheet Thanks for listening y EVORA Dd SOMA E Heyoka Solutions 2012
14. whole building table 2 Adjust the rate for an existing fan in a bathroom or kitchen 3 Adjust the rate for a window in a bathroom or kitchen 4 Reduce the whole building flow rate with the Infiltration Credit lt LENA A pS VOR a y B me Heyoka Solutions 2012 y Existing Buildings Appendix A Example Existing 2 bedroom 1400 ft single story home in Philadelphia PA Bathroom has an existing fan with 25 cfm measured airflow and an operable window Kitchen has an existing range hood with 70 cfm measured airflow and an operable window Fans can be left in place and a new primary ventilation fan can be added to satisfy the whole building ventilation rate plus the deficit in the local ventilation Calculate the total deficit and divide by 4 Heyoka Solutions 2012 do le A PEA Y j de EN F P 1 ExIstinc J i J i a j gt y y a wW Wa Y a Y 3 Buildings Appendix A Information necessary for making the airflow calculation with existing fans Pennsylvania N Factors Required parameter es Location Philadelphia PA Allentown Number of stories Erie Location N factor Harrisburg Number of bedrooms dao Floor area 1400 ft Pittsburgh Kitchen fan measured airflow 70 cfm Kitchen window Yes Bathroom fan measured 25 cfm Note N factors include weather airflow information from ASHRAE 136 Bathroom window Yes EE O Y arrg pt
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