Home

A User Guide to iSBEM: (3) EPC Generation - UK

1. CERET T eoeeeeeeeoeoeereseeeeerssssseeceesso 34 Figure 16 HVAC systems definition System Controls sub tab cccccccccccsseccccccceete ce eesseeeececeaaeeeseeceeesaaaaeseseeeeees 35 Figure 17 Defining a HWS in the General sub tab AEEE 0 TE ooe ee eoeeresseeeeeese 36 Figure 18 Selecting a zone s HVAC HWS and lighting Systems ooooeeeeeeesssesssssssessererssssssssssssssesrerressssss 39 Figure 19 Defining the zone ventilation in the Ventilation SUD tAD ccccccccccecccccceeeeecte es sseesssseseeeeeesseeenaas 40 Figure 20 Using the interface to calculate the Asset Rating for the building in the Asset Rating tab of the Ratings form for England cccccsseecsccccssenseesssccccsensssscsccess D sss oescsccceceessscesc O oeeo ee 44 Figure 21 Using the interface to calculate the Asset Rating for the building in the Asset Rating tab of the Ratings form for Scotland ssssee s o G AQUMMMMMMIDD sc ccnnseeesscccesenssrsesccccseeassettsscesseasseeess 45 Figure 22 The Graphic Rating sub tab in the Asset Rating tab of the Ratings form cccccccccecccccccceeeeeeesseceeees 46 Figure 23 The Recommendations sub tab in the Asset Rating tab of the Ratings form showing an NCM recommendation ee Se Se 49 Figure 24 The Recommendations sub tab in the Asset Rating tab of the Ratings form showing the active fields for creating A user defined TECOMMENAALION ccccccccccssveecesecccceenn
2. Figure 20 Using the interface to calculate the Asset Rating for the building in the Asset Rating tab of the Ratings form for England 44 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM ACTUAL SCOTLAND EPC Asset Rating Building Rating EPC Audit Calculation Logs Calculation Errors Supporting Documents Heating Cooling Ausilary Lighting Hot Water Total Actus STs Nationa kwhim2 sr 56 TER Actual Comparable in Ew nt a ae a a E kglO2 m2 yr Calculate EPC Rating Click on text below for EPC Rating Energy Performance Certificate SBEM Outputs Band 0 EFC recommendations report Data Reflection Actual Building Calculation progress Asset rating completed Click to check object assigments there are NO CRITICAL un assigments in the project Figure 21 Using the interface to calculate the Asset Rating for the building in the Asset Rating tab of the Ratings form for Scotland Graphic Rating sub tab The Graphic Rating sub tab Figure 22 is only visible for the generation of EPCs for England Wales and Northern Ireland It displays the following 1 A graph of the EPC rating band scale showing the energy bands and asset ratings corresponding to the annual CO emissions from the actual building the target Part L TER the typical building Stock average TYP and the reference and zero CQ em
3. NB You must close all output files before re running the calculation so the software can over write them Otherwise an error message will be produced 58 iSBEM version 5 2 d EPC Generation UK 31Jul14 ACEI File Edit View Tools Help Organize v Open E mail Burn New folder Zz v fil name Date modif XML file for official submission of the EPC and the 0100 0038 0000 0029 0002 xml 08 04 2014 Recommendations report _ Example building Complete_ref sim 24 06 2014 16 24 SIM File 102 KB __ Example building Complete_not sim 24 06 2014 16 24 SIM File 117 KB __ Example building Complete sim 24 06 2014 16 24 SIM File 117 KB __ Example building Complete_sim ovh 24 06 2014 16 _ Example building Complete nct S672 The NCT file the file read by iSBEM E Example building Complete_sim csv 24 06 2014 16 24 Microsoft Excel C 8 KB E E Example building Complete_ref_sim csv 24 06 2014 T6 c weal f i EL Example building Complete_not_sim csve 24 004 16 2 Technical Output report for the actual building as Example building Complete_not_dr csv 2406 2014 16 2 Technical Output report for the reference building E Example building Complete_epc csv 24 06 20 2 EL Example building Complete_dr csv 6 2014 16 24 Technical Output report for the notional building I Example building Complete_ref inp 24 06 2814 16 24 INP File 91 KB ae Ee epee ee RUES csv Data Reflection repor
4. contains the audit trail information relating to the geometry input parameters i e definitions of thermal bridges air permeability and shading systems on glazing e HVAC amp HWS sub form contains the audit trail information relating to the HVAC and HWS input parameters i e heating and cooling system type heating and cooling efficiencies duct and AHU leakage specific fan power HWS generator efficiency metering and controls provision and high pressure drop air filtration 50 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Lighting sub form contains the audit trail information relating to the lighting input parameters i e lamp type lighting controls and parasitic power This sub tab is where the energy assessor provides supporting evidence for over riding any of the default values in iSBEM This information is necessary for the audit trail regarding all the parameters that are used to carry out the energy calculations for the generation of the EPC should any of the default values or settings be changed by the energy assessor Each of the above four sub sub tabs contains the following 1 Accept defaults this is the list of defaults set in iSBEM for each of Construction Geometry HVAC amp HWS and Lighting which the energy assessor can over ride 2 Assessor walk though inspection supporting evidence based on a walk through inspection by the energy assessor 3 Inspection by other Sales particulars
5. port was produced S ool iSBEM v5 2 b using e the Energy Assessor did uilding prior to producing this Page 3 of 7 64 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 3 Recommendations The following sections list recommendations selected by the energy assessor for the improvement of the energy performance of the building The recommendations are listed under four headings short payback medium payback long payback and other measures a Recommendations with a short payback This section lists recommendations with a payback of less than 3 years Recommendation Potential impact Consider replacing T8 lamps with retrofit T5 conversion kit HIGH Introduce HF high frequency ballasts for fluorescenttubes LOW Reduced number of fittings required b Recommendations with a medium payback This section lists recommendations with a payback of between 3 and 7 years No recommendations of medium term payback have been identified c Recommendations with a long payback This section lists recommendations with a payback of more than 7 years Recommendation Potential impact Consider installing building mounted wind turbine s Add time control to heating system Consider installing PV Add optimum start stop to the heating system Some walls have uninsulated cavities introduce cavity wall LOW insulation d Other recommendations This section lists other recommendations sel
6. supporting evidence based on sales particulars 4 Inspection by other Technical inspection supporting evidence based on a technical inspection by someone other than the energy assessor 5 On site measurements of input parameters for assessment supporting evidence based on on site measurements of the input parameters 6 Other sources supporting evidence based on other sources 7 Comments additional information that the energy assessor would like to include for the audit trail General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Asset Rating EPC England Building Rating Graphic rating Recommendations EPC Audit Calculation Logs Calculation Errors Supporting Documents Construction Geometry HVAC amp HWS Lighting Please introduce concise supporting evidence for over wrting default values Accept default Internal wall roof floor parameters based on age generc type thermal bridging based on use of accredited details Assessor walk through inspection Type of internal wall root floor Inspection by Sales others particulars Technical inspection Constructionreguiations date from building control approval documentation On site measurements of input parameters for assessment Design or as built documentation External wall door glazing parameters derived from first principles from drawings and manufacturers info accredited detai
7. Roof heat loss area is as seen from underside of ceiling i e L x d Zone depth h U value is from under ceiling to 3 outside roof U End wall area is whole gable up to roof apex as this is all exposed to inside temperature e If there is a horizontal ceiling half way up the pitched roof split the area into The part with a void L using the U value including the void U n The part where there is no void L2 Ls using the U value without a void Ur2 Zone height is still to underside of soffit eaves level So the general rule is to input the area exposed to the inside temperature and the U value between this surface and outside except for the dropped ceiling case 90 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Intermediate floors with suspended ceilings and raised floors e With suspended timber ground floor and ventilated void below Zone height is top of floor slab to top of next floor slab e g h4 So ignore the suspended ceilings and raised floors for the purposes of e zone height e surrounding wall areas But include their impact on Kappa values of the slabs above and below so that thermal mass effects are calculated correctly Zone height is top of suspended floor surface to top of first floor surface h st Where the floor U value is calculated it should take account of the ventilated void Ust Fr 2 2 ee Ee ee ee ee ee ee ee ee ee ee ee ee ee a When there are
8. UK 40 iSBEM version 5 2 d EPC Generation UK 31Jul14 Solar Collector sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 3 6 Building Navigation form Guidance on this form is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 7 About iSBEM form Guidance on this form is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 41 iSBEM version 5 2 d EPC Generation UK 31Jul14 4 CALCULATING AND VIEWING THE ENERGY PERFORMANCE OF THE BUILDING THE RATINGS FORM AND OUTPUT REPORTS The energy performance of the building is calculated and the Energy Performance Certificate is generated via the Ratings form The key results are then displayed in this form while further details on the asset rating and a more detailed analysis of the energy used and CQ emitted from the building are given in the SBEM output reports This chapter describes how to calculate the results and access the various outputs 4 1 The Ratings form The Ratings form allows the user to run the entered building model through SBEM and the Energy Performance Certificate Generator Module EPCgen to calculate the energy consumption of the building CO emissions and those of the notional reference and typical buildings and its Asset Rating You can do this by press
9. after 2001 bi Do pou know the generator radiant efficiency Was it installed in or after 19982 House defaulivalue 0 4 its iF Yes Yes radiant eficienen ts 0 4 Record H l afi oR ORS W Unfiltered Search Figure 15 HVAC systems definition Heating sub tab Cooling sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK System Adjustments sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Metering Provision sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK System Controls sub tab The software also needs to know if you have certain controls in your heating system which would be considered during the production of the energy efficiency recommendations to accompany the EPC There are 5 tick boxes in this sub tab See Figure 16 Heating System Controls 1 Tick box to indicate whether the heating system has central time control 2 Tick box to indicate whether the heating system has optimum start stop control 3 Tick box to indicate whether the heating system has local time control i e room by room 4 Tick box to indicate whether the heating system has local temperature control i e room by room 34 iSBE
10. iSBEM version 5 2 d EPC Generation UK 31Jul14 e Heating only Other systems Assumed to be a wet radiator system where heat is generated by fuel combustion Pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in this sub tab Figure 13 e Heating and mechanical cooling Assumed to be a constant volume air system with terminal reheat and fixed fresh air Refrigeration chillers fans and pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in this sub tab Figure 13 NB The default HVAC systems in iSBEM are representative of existing rather than new buildings and should only be used if you are running an EPC calculation for an existing building not a new building and do not know the type of the HVAC system in your building or its detailed parameters as the default efficiencies assumed by iSBEM for them are quite pessimistic and cannot be edited by the user Project Building Services sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Air Conditioning Inspection sub tab This sub tab is visible only if EPC generation in England Wales or Northern Ireland is selected as the Purpose of Analysis in the General form gt General Informationtab gt Project Details sub t
11. 02 P HVAC amp Hw systems Ventilation Ventilation cont Exhaust Lighting Lighting Controls Display Lighting Solar Collector Zonal Yentilation Type Does activity require high pressure drop air treatment C Natural Mechanical supplyextract f Use default from Activity database Use user value LI Tick if pes Do you know the Supply Extract SFP Demand controlled ventilation f Wo use the default 1 5 Wils No demand controlled ventilation s es SFP for the system is 0 5 Wilts Damper control Record H 4 2o0f19 de i o Filte Search Figure 19 Defining the zone ventilation in the Ventilation sub tab Ventilation cont sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Exhaust sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Lighting sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Lighting Controls sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Display Lighting sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment
12. Cooling AuxiliaryLighting Hot Water improved Created ON 15 01 2014 14 18 41 Search Record H i of 1 Record H 1 of 1 Fl i No Filter Search Figure 10 New improvement measure 5 At this point the assessor should go to the relevant section in iSBEM in order to make the change to the building model that is relevant to the improvement measure just created For example if the measure is for changing T8 lamps to T5 lamps the assessor should go to the Building Services form gt Zones tab gt Lighting sub tab and change the lamp types of all the zones which have T8 to T5 If the recommended improvement is to upgrade single glazed windows to double glazing the assessor should got to theProject Database form gt Glazing tab gt General sub tab and modify the definition of the glazing type which is assigned to those windows If the recommended improvement is for adding a PV system then the assessor should go to the Building Services form gt PVS tab gt General sub tab and enter the definition of the PV system in order to add it to the building model and so on 6 Once the building model has been modified with the recommended improvement measures the impact on the energy performance of the building and its CQ emissions can be assessed In the Ratings form click on the Calculate EPC rating button see section 4 1 1 Asset Rating tab to initiate the calculation of the building s performance with the improvement scenar
13. General Informationtab gt Project Details sub tab is EPC generation then iSBEM s default value for air permeability will be 25 ni h m However the user can over write the default value by manually entering an alternative value Convention For EPCs Air permeability To accommodate different ages and types of building where the SBEM default value of 25 nyh m for all existing buildings has been viewed as unduly restrictive the value shall be amended as follows Less than 10 m h m only with an accredited air pressure test result 10 m hm buildings with total floor area gt 500 nf built to 2002 Building Regulations 15 m hm buildings with total floor area lt 500 nf built to 2002 Building Regulations and buildings built to 1995 Building Regulations 25 m hm buildings built to Building Regulations pre 1995 35 m hm to be considered where buildings are pre 1995 regulations and where suitable evidence of high permeability exists e g single skin metal clad structure within Planning Use Class B2 B8 with large roller shutter doors and poor constructional details etc 24 iSBEM version 5 2 d EPC Generation UK 31Jul14 ing Navigation General Project Database I Geometry Building Services Ratings Build Project Zones Envelope Doors Windows amp Roofliights About iSBEM Geometrical detail for the whole Project T General amp geometry Global Ther
14. How to use iSBEM Compliance Assessment UK 3 4 6 Quick Envelopes tab Short cut to creating envelopes and windows Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 3 5 Building Services form Guidance on input parameters in this form not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK This form holds all the information relating to the building services This information is entered into the following main tabs these are circled in Figure 13 e Global and Defaults tab This tab contains some default information on HVAC systems if no or little information is known about the systems in the actual building It also requires information on the electric power factor and lighting controls for the whole building e HVAC systems tab e HWS tab e SES tab e PVS tab e Wind generators tab e CHP generator tab this tab only appears when one of the HVAC systems described in the HVAC Systems tab is specified as using CHP e Solar collectors tab e Zones tab 29 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About SBEM Building services detail for the whole Project HVAC System Defaults Project building services Air Conditioning Inspection These shoul
15. Main renewable source Select to either let SBEM determine the main renewable source to appear on the Scottish EPC based on the input parameters and the calculated results select From calculation or to display Other non calculated on the EPC to denote that the main renewable source is of a type that cannot currently be modelled in SBEM This parameter is active only if the Scottish EPC is selected in the Purpose of the Analysis parameter above 15 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM File Options General Information Basic information about Project Owner and Energy Assessor 7 Project details Additional project details Special considerations EPBD Recast Building details Energy Assessor details Owner details Related party disclosure Not related to the owner Transaction type Mandatory issue Marketed sale Figure 3 The Additional project details sub tab of the General Information tab in the General form Additional Project Details sub tab In this sub tab the following information can be entered Figure 3 1 Related party disclosure any related party disclosure by the Energy Assessor for the purposes of energy calculations for EPCs This parameter is active only if the Purpose of Analysis paramete
16. Non Domestic Heating Cooling and Ventilation Compliance Guide Record H l ofi E H W Unfiltered Search Figure 16 HVAC systems definition System Controls sub tab Bi valent Systems sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Zone Summary sub tab Guidance on this sub tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 3 Defining HWS HWS tab Guidance on input parameters in this tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK The HWS tab has four sub tabs e General sub tab 35 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Storage amp Secondary Circulation sub tab e Assigned sub tab e Bi valent Systems sub tab General sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK A HWS is defined by the following information 1 Is it later than 1998 Tick if the system was installed later than 1998 The generator type selected above determines whether this tick box is enabled Whether this box is ticked determines the default seasonal efficiency used by the tool if no value is input by the user NB For boiler systems installe
17. are identical to the 2006 Part L notional building except that certain parameters in the reference building are fixed subject to conditions below irrespective of features in the actual building please refer to the 2013 NCM Modelling Guide available from www ncm bre co uk for the detailed description of the reference building These aspects are a The heating and hot water service is always met by a gas fired system irrespective of whether a fuel other than gas is used in the actual building or is even available in the locality of the actual building b The spaces in the reference building have a fixed servicing strategy regardless of the strategy adopted in the actual building except if the corresponding space in the actual building is unconditioned see below Therefore e Each space is heated to the heating setpoints defined in the activity database irrespective of whether the particular space in the actual building has heating provision or not except if the corresponding space in the actual building is totally unconditioned see below e Each space is cooled to a fixed cooling setpoint irrespective of whether the particular space in the actual building has cooling provision or not except if the corresponding space in the actual building is totally unconditioned see below e Each space which is unconditioned i e unheated and uncooled in the actual building will also be unconditioned in the reference building
18. before reaching any decision on how to improve the energy efficiency of the building b Carbon impact The High Medium Low carbon impact indicators against each recommendation are provided to distinguish between the suggested recommendations those that would have most impact on carbon emissions from the building For automatically generated recommendations the carbon impact indicators are determined by software but may have been adjusted by the Energy Assessor based on his her knowledge of the building The impact of other recommendations are determined by the assessor c Valid report A valid report is a report thathas been e Produced within the past 10 years e Produced by an Energy Assessor who is accredited to produce Recommendation Reports through a Government Approved Accreditation Scheme e Lodged on the Register operated by or on behalf of the Secretary of State Page 7 of 7 68 iSBEM version 5 2 d EPC Generation UK 31Jul14 A 3 Sample SBEM Secondary Recommendations Report secondary Recommendations Report Not for Official Submission Building name Example building Building type B1 Offices and Workshop businesses Date Mon Apr 07 17 18 28 2014 This report lists recommendations for energy efficiency improvements to the building Key to colour codes used in this report Included by the calculation Included by the user Excluded by the user Recommendations for HEATING HEATING accounts for 1
19. cccccceee cece cece eee Ai D ARR 24 3 4 17 Project tab sl lh Sl OD 24 3 4 2 Defining zones Zonee AQMD os cecseeanesscccssanscsssessenasessensseens 25 3 4 3 Defining envelopes Envelope tab cccccccsseecccnneeteccsscseccsscueeccsaaueccssausesessaussessaes 28 3 4 4 Defining windows and rooflights Windows amp Rooflights tab cscccccssseseessseeeeeees 28 3 4 5 Defining doors Doors tab SSA C ARMM i atccesssssesssesseasscesesseeees 29 3 4 6 Quick Envelopes tab Short cut to creating envelopes and WINKOWG cc1s1eeeeseeees 29 3 5 Building Sqg aSCeiaiim NIB a E T 29 3 5 1 Cee OJIN gt A gt See 30 3 92 Defining HVAC Systems HVAC Systems tab nenennenannnnnnneennnnnnnnnnnnnennnnnnnnnnnnne 32 3 5 3 Defining WES HWS WB N cco essecessneccsssecaassseseeececsencoeaseesneeeeenseceeaaes 35 3 5 4 Defining Solar Energy Systems SES SES tab 2cccccccccccssccnenneeeseeeeeesnaeennneees 37 3 5 5 Defining a Photovoltaic system PVS PVS tab cccccccccsseseecsssseeecesseeeesaaeeeessaneesenes 37 3 od Defining a wind generator Wind Generators tab cccseeeeeeeeeee cece ence eeeeeeeeeeeeeeeeaas 37 KOT Defining a CHP generator CHP Generator tab cccccecssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenaas Bf 3 5 8 Defining a Solar Collector Solar Collectors tab ccccccsseeceeccessseeseceseesee
20. objects being processed by SBEM Hence creating a project with a very large number of objects will slow down the calculation and may cause it to crash The Zones tab contains four sub tabs e General sub tab e Quick Envelopes sub tab e Thermal bridges sub tab e Envelope Summary sub tab 25 iSBEM version 5 2 d EPC Generation UK 31Jul14 General sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK To create a zone you will need to click into the General sub tab of the Zones tab add a new record and enter the following information 1 HVAC System If you have defined your HVAC systems before defining your zones i e if you have started with the Building Services form instead of the Geometry form you can select the HVAC system that serves this zone from the drop down list If no HVAC system serves the space i e an unconditioned zone that is intended to remain that way select Zones without HVAC system spaces which have no heating or cooling e g plant rooms storage spaces exposed circulation spaces If you have not yet defined your HVAC system this can be left as Unassigned at this stage You will be able to assign the zones to an HVAC system later within the Building Services form so there is no need to define the HVAC system before continuing If you leave the zone as unassig
21. report not the official Recommendations report e Energy Impact You can select from the options available in the drop down menu in order to specify the potential impact of implementing the recommendation on the energy performance of the actual building HIGH change in total building energy is gt 4 MEDIUM change in total building energy is lt 4 and gt 0 5 LOW change in total building energy is lt 0 5 NB If you enter the value as UNKNOWN SBEM will set it to LOW f COs Impact You can select from the options available in the drop down menu in order to specify the potential impact of implementing the recommendation on the CO emissions of the actual building HIGH change in total building CQ emissions is gt 4 MEDIUM change in total building CO emissions is lt 4 and gt 0 5 LOW change in total building COQ emissions is lt 0 5 This impact will appear in the Recommendations report NB If you enter the value as UNKNOWN SBEM will set it to LOW g CO Saved per Spent You can select from the options available in the drop down menu GOOD FAIR POOR and UNKNOWN in order to specify the potential CQ emissions saved from the actual building per pound spent on implementing the recommendation in the actual building NB If you enter the value as UNKNOWN SBEM will set it to POOR h Payback drop down menu You can select from the options available in the drop down menu LONG MEDIUM and SHORT in ord
22. the solid floors of the building thereby increasing the coolth contained in the thermal capacity of the building structure available to offset subsequent summertime daytime cooling loads 87 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX E Agreed convention for determining dimensions NB The data below is developed and maintained by Accreditation Scheme Providers so it is constantl evolving and assessors are advised to contact their scheme providers for the most up to date version Horizontal dimensions oe Plan n Consider Building 1 Building 2 e Plan view of two buildings in a terrace Separated by a party wall Building 1 has two zones e Wall runes Perimeter surrounds each building external and party walls Internal refers to walls within each building partitions aa a a anon nets Party wall Zone A Zone B ee Generally follow RICS definition of Gross Internal Area Need to measure e Inside perimeter walls e Mid point of internal walls e Party walls are perimeter so measure to surface not mid point Openings e Inside structural opening w x h e Not just glass area e Percentage glazing is as viewed from inside le percentage of wall area to full zone height defined below e 100 Glazing Enter a wall of total area Enter glazing with same area or as 100 88 iSBEM version 5 2 d EPC Generation UK 31Jul14 Zone height an
23. typically be controlled by presence detectors CO 2 sensors or another device that senses the varying requirement Lightwell A lightwell is a space surrounded by the walls of a building but that has no roof or glazing above it It is therefore similar to a courtyard in appearance The walls that surround the lightwell are exposed to external air Night Ventilation Strategy Can be defined as the presence of suitable systems controls and operating strategy such that overnight ventilation passive and or mechanical is used to cool down the exposed building mass and thereby offset daytime cooling demands If no such operation and subsequent offset is possible through the automatic operation of systems and controls then night ventilation strategy is deemed to be not present as part of the building energy asset rating Lightpipes A lightpipe is a tube pipe consisting of internal reflective surfaces which channels daylight to an internal area 86 iSBEM version 5 2 d EPC Generation UK 31Jul14 Ventilation with Enhanced Thermal Coupling to Structure This is a further development of the night ventilation strategy such that significant components of the building structure in addition to its ordinary surfaces are exposed to night ventilation in order to enhance the building s capability of offsetting daytime cooling demands An example of this procedure is the ThermoDeck system where night ventilation is passed through ducts in
24. walls of different heights to consider e For sloping floors and ceilings eg auditoria If the activity above and under the floor is the same or the void Is inaccessible choose normal zone height otherwise zone height weighted average wall height hai Naz Nag etc from where floor adjoins each wall to top of floor above Zone area A is projected area plan area as per RICS GIA standard Make sure in addition that all external and internal wall and slab areas are input so that all heat loss gain and thermal mass is calculated Don t forget this void is another Note that zoning for daylit areas must zone if it has a different activity be carried out manually in these Its zone height area weighted circumstances do not use automatic average vertical wall height daylight zoning If it has the same activity or is inaccessible then merge with e For cubical rooms under the sloping floor auditorium and enter zone area Zone height top of slab to top of slab as though the floor is flat La x d hs However the sloping floor area e Area weighted average wall height is defined as must be input so that thermal total wall area divided by horizontal perimeter mass is calculated length eg 2L 2 x depth d in the diagram 91 iSBEM version 5 2 d EPC Generation UK 31Jul14 e For rooms with mono pitched ceiling Zone height is top of floor to weighted average height of all walls h4 Area of roof
25. will remain unconditioned e g plant rooms storage spaces exposed circulation Spaces If you do not know the type of the HVAC system in your existing building or its detailed parameters you should select one of the following default options from the drop down menu e Heating only Electric resistance Heat generated by passing an electric current through resistance wire Assumed to be an electric central heating system with warm air distribution Fan storage heaters and electric fan converters should be input by defining an HVAC system in the Building Services form gt HVAC Systems tab gt General sub tab and selecting the system type Other local room heater fanned If you do not know the heating method i e whether a heated only building uses electricity or a ftuel based heating system you should select electric resistance heating as your default e Heating only Other systems Assumed to be a wet radiator system with heat generated by fuel combustion Pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in the Building Services form gt Global and Defaults tab gt HVAC System Defaults sub tab see Section 3 5 1 Global and Defaults tab e Heating and mechanical cooling Assumed to be a constant volume air system with terminal reheat and fixed fresh air Refrigeration chillers fans and pumps assumed to be powered by grid sup
26. 12 iSBEM version 5 2 d EPC Generation UK 31Jul14 A 4 Sample Energy Performance Certificate for Scotland Energy Performance Certificate for buildings other than dwellings Building Energy Performance Scotland Calculated asset rating using Building type iSBEM v5 2 a SBEM Office Workshop Current rating Excellent Carbon Neutral A 0 to 15 16 to 30 31 to 45 46 to 60 61 to 80 81 to 100 100 Carbon Dioxide Emissions The number refers to the calculated carbon dioxide emissions in terms of kg per m of floor area per year Approximate current energy use per m of floor area 237 kWh m Main heating fuel Natural Gas Building Services Air conditioning Renewable energy source None Electricity Grid supplied Carbon Dioxide is a greenhouse gas which contributes to climate change Less Carbon Dioxide emissions from buildings helps the environment Benchmarks A building of this type built to building regulations standards current at the date of issue of this certificate would have a rating Recommendations for the cost effective improvement lower cost measures of the energy performance 1 Consider replacing T8 lamps with retrofit T5 conversion kit 4 Add time control to heating system 2 Introduce HF high frequency ballasts for fluorescent tubes 5 Add optimum start stop to the heating system Reduced number of fittings required 3 The default chiller efficiency is chosen It is recommended
27. 2 of the CO2 emissions The overall energy performance of HEATING provision is GOOD The overall CO2 performance of HEATING provision is GOOD The average energy efficiency of HEATING provision is GOOD The average CO2 efficiency of HEATING provision is GOOD Add time control to heating system Code EPC H2 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Add local time control to heating system Code EPC H5 Energy Impact LOW CO2 Impact LOW CO2 Savedper Spent POOR Applicable to Whole building Comments Add local temperature control to the heating system Code EPC H6 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Add optimum start stop to the heating system Code EPC H7 Energy Impact LOW CO2 Impact LOW 69 iSBEM version 5 2 d EPC Generation UK Page 1 of 4 31Jul14 CO2 Saved per Spent POOR Applicable to Whole building Comments Code EPC H8 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Add time control to heating system Code EPC H2 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to HVAC for the example building Comments Add local time control to he Code EPC H5 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent R Applicable to cC example
28. 2 d EPC Generation UK 31Jul14 contains residential accommodation above a non domestic space e g a shop or a pub provided that the residential space can only be accessed from within the non domestic space i e the residential part is not designed or altered for use as a Separate independent dwelling In addition to common circulation areas of apartment buildings containing self contained flats these are the only cases where SBEM can be used to model domestic areas For more information on the appropriate software tools to use for modelling your building please refer to DCLG s publication Improving the energy efficiency of our buildings A guide to energy performance certificates for the construction sale and let of non dwellingS which can be accessed from DCLG s website at htips www gov uk government publications energy performance certificates for the construction sale and let of non dwellings 2 Infiltration 2 Air permeability at 50pa in m h m If the purpose of analysis option that has been selected in the General form gt General Information tab gt Project Details sub tab is EPC generation then iSBEM s default value for air permeability will be 25 ni h m However the user can over write the default value by manually entering an alternative value NB For EPCs of existing buildings note that the air permeability convention given in section 3 4 1 Project tab should apply Figure 12 shows a zone being defin
29. 28 C field enabled only for Scotland EPC Rating with improvements field enabled only for Scotland EPC Rating if in E amp W field enabled only for Scotland EPC Main renewable source field enabled only for Scotland EPC Is mains gas available on site field enabled only for Scotland and Wales EPCs Sub tab Additional Project details Related party disclosure field enabled only for England Wales and Northern Ireland EPCs Transaction type Sub tab Building details Building type Name of project Building address City Postcode Location description UPRN Are any restrictions to be imposed on the retrieval of the EPC s XML file from the National Register in Scotland field enabled only for Scotland EPC Inspection date Is building of special conservation status field enabled only for England Wales and Northern Ireland EPCs Sub tab Energy Assessor s Qualified Accredited Person s details Sub form Energy Assessor s Qualified Accredited Person s details Name Telephone number Email address Address City Postcode Assessor number Membership number Accreditation Scheme Protocol Organisation Qualifications field enabled only for England Wales and Northern lreland EPCs e Employer Trading name e Employer Trading address Sub form Insurance details 74 iSBEM version 5 2 d EPC Generation UK 31Jul14 Insurance Company Policy Number Policy start effective date Policy end exp
30. 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Asset Rating EPC England re Show Recommendations C AlNCH i AINUSER i Al Only from Repor we T Click to Edit this Recommendation Recommendation Click to take out Categoy EGOLING Code EPC C1 Energy impact z iat The detault chiller efficiency is chosen tie recommended that the chillersystem be invezhgated bo gain an Understanding of its eficiency and possible improvements CO2 impact Assessor comments No comments from assessor LO saved pert spent Fo OR 7 Payback Applicable ta FEUILDIRIG Pay back BS557 wears UNET Record H 1 of 63 Eo oR oR a Filte Search Figure 23 The Recommendations sub tab in the Asset Rating tab of the Ratings form showing an NCM recommendation NB After editing deleting or adding any recommendations you need to re run the calculation in order to re generate the Recommendations Report with all your editing applied NB The NCM recommendations are generated for the building and its energy systems when operated according to standard schedules appropriate to the general activities in the building The Energy Assessor is expected to use his or her knowledge to remove inappropriate ones and possibly to add further ones If the Energy Performance Rating calculation has made extensive use of default values some of the recomm
31. 5 2 d EPC Generation UK 31Jul14 2 CALCULATION BASICS 2 1 UK Energy Performance Certificate purposes The calculation procedure required by the NCM is explained more fully in the National Calculation Methodology Modelling Guide SBEM complies with the NCM It is suitable for use with the majority of buildings but some designs will contain features that mean that more accurate energy calculations may be obtained by more sophisticated calculation methods This section briefly defines the reference building which is the basis of setting the energy rating scale for Energy Performance Certificates EPCs for England Wales and Northern Ireland The Asset Rating rates the CO emissions from the actual building in comparison to a Standard Emission Rate SER where both emission values are in kgCQ m annum The Standard Emission Rate is determined by applying a fixed improvement factor to the emissions from a reference building which is defined below EPCs are intended to send market signals about the relative performance of comparable buildings and so it is necessary that the reference building should be the same for all buildings of a given type In order to provide this consistency the reference building must be the same irrespective of a whether the actual building is naturally ventilated or air conditioned and b the fuel choice in the actual building The insulation levels and HVAC efficiencies in the reference building
32. A is as seen from underside i e L4 x zone depth Average i of all U value from under ceiling to outside fis U four wall A heights Naav Use total area of gable wall Note that zoning for daylit areas must be carried out manually in these circumstances e fthere is a horizontal ceiling under the mono pitched roof Level with or below eaves zone height at eaves Above eaves zone height average exposed wall height Roof area would have to be divided into areas with different U values with and without void 92 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Curved roof for EPCs all buildings with curved roof sections shall be approximated as in the diagram e Walls are 70 90 from horizontal roofs are lt 70 e So zone height h w dividing point between wall and roof where slope U 70 at eaves e Ifa floor eg as shown dotted meets roof at lt 70 there is no wall so zone height ho average height of space e If the dotted line represents the ceiling with an unoccupied void Circular not elliptical or other shapes Semi circular so that width 2 x height rch Lone one side h above remember to input the area of roof where the slope lt 70 between this ceiling and For consistency the convention is to the eaves with its U value assume all such roofs are semi circular Ur and lf floor width L and building depth is d th
33. AC system type o Heat recovery in ventilation system field enabled if there is mechanical ventilation at HVAC level B Heat recovery seasonal efficiency B Variable heat recovery efficiency Sub iab Heating System Heat source Fuel type for heat generator Does this heating system also use CHP Effective heat generating seasonal efficiency for heat generator Heat generator radiant efficiency field enabled if HVAC is a radiant system e Does the heating system qualify for ECA relevant only if default efficiency value is used o Was the heating system installed in or after 1998 relevant only if default efficiency value is used Sub tab Cooling System enabled only if HVAC system provides cooling Generator type Generator kW Fuel type for cooling generator Seasonal energy efficiency ratio for cooling generator Nominal energy efficiency ratio for cooling generator Does the cooling system qualify for ECA relevant only if default efficiency value is used e Does the system have mixed mode operation strategy Sub tab System adjustment enabled only if there is mechanical ventilation at HVAC level e Has the ductwork been leakage tested o CEN classification it meets 79 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Does the AHU meet CEN leakage standards o CEN classification it meets e Specific fan power W I s e Variable speed pumping o Type Sub tab Metering Provision e Does the HVAC system have provision for metering
34. Building details Energy Assessor details Owner details Energy Assessor details Insurance detail Insurer company Insurance Policy number 0o01 Effective date 01 08 2010 Calendar Expiry date 31 07 2011 Calendar FI Limit 500000 Clear all Figure 6 Insurance Details in the General form Insurance Details sub form This is where the following information can be entered 1 Insurer Company Name of the energy assessor s insurance company NB The text input in this field should not include any double quotes Policy Number The energy assessor s insurance policy number Effective Date The energy assessor s insurance policy effective start date Expiry Date The energy assessor s insurance policy expiry date or SY PI Limit The energy assessor s insurance policy cover limit Owner Details sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 3 2 3 Obtaining Potential Asset Rating for EPC Scotland In order to obtain the potential asset rating for a Scotland EPC the assessor will need to have first run the EPC calculation to obtain the asset rating for the building as it currently is i e with the EPC Type parameter in the General form gt General Informationtab gt Project details sub tab set to Actual see Figure 7 20 iSBEM version 5 2 d EPC Generation UK 31Jul14 G
35. EPC Generation UK 31Jul14 A 2 Recommendations Report for Example Building 0000 2090 0040 1000 0803 Recommendation Report HMGovernment Report Reference Number 0000 2090 0040 1000 0803 56 London Road LONDON SW23 1HA Building Type s B1 Offices and Workshop businesses Total Useful Floor Area m Calculation Tool Used engine SBEM v5 2 b 1 Property Reference Report Reference Number 0100 0038 0000 0029 0002 Assessor Name Employer Trading Name Employer Trading Address Assessor Number Accreditation scheme EPCgen NET test AS Related Party Disclosure Not related to the owner Unless superseded by a later recommendation report Page 1 of 7 62 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 Table of Contents 1 BACKOTOUNG aaa 2 producion sscan 3 Recommendations 4 Nod SlODSisissiscecssesesecasae 5 Glossary Page 2 of 7 63 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 1 Background Statutory Instrument 2007 No 991 The Energy Perf Certificates and Inspections England and Wales amended transposes the requirements of Articles Performance of Buildings Directive 2002 91 EC This report is a Recommendation Rep 16 2 a and 19 of the Statutory Instrum This section provides informe Building Environment Air Conditioni g o 2 Introduction This Recommenda he Government s
36. M version 5 2 d EPC Generation UK 31Jul14 5 Tick box to indicate whether the heating system has weather compensation control NB The HVAC system controls defined in the System Controls sub tab are used by SBEM only for generating the EPC Recommendations for the Recommendations Report and do not affect the actual energy calculations or the input value for the system efficiency NB If you have more than one HVAC system defined in your project theSystem Controls sub tab will be available for each one of them i e each HVAC system can have control definitions different from the others General Project Database Geometry Building Services Global and Defaults HVAC systems Hws SES pvs wind generators Transpired solar collectors Zones Ratings Building Navigation eee ee E ea IEA General Heating Cooling System Adjustment Metering Provision System Controls Bi walent Systems Zone Summary m Heating System Controls Tick where these controls are present in this HVAC system Central Time Control Optimum start stop Control Local Time Control li e room by room Local Temperature Control i e room by room weather Compensation Control In order to assess the impact of these controls you should modify the heat generator efficiency in accordance with the Heating efficiency credits for each system type given in the
37. User Guide ISBEM An Interface for SBEM Simplified Building Energy Model Part of the N ational Calculation M ethodology SBE M for assessing the E nergy Performance of Buildings A User Guide to iSBEM 3 EPC Generation UK iSBEM version 5 2 d 31 July 2014 Communities and Local Government ee iSBEM version 5 2 d EPC Generation UK 31Jul14 Version history For iSBEM version Building Regulations 22 December 2005 2006 24 January 2006 2006 9 March 2006 2006 11 May 2006 2006 4 October 2006 2006 6 April 2007 2006 30 April 2007 2006 18 May 2007 2006 2 November 2007 2006 6 February 2008 2006 12 February 2008 2006 2006 2006 2006 2006 2006 2006 26 May 2009 2006 1 March 2010 2006 2010 2013 for England Beta 2014 for Wales 2013 for England and st 31 July 2014 9 2 0 2014 for Wales Key changes and additions from previous versions of the User Guide Changes and additions in 31 July 2014 version 5 2 d There have been no changes since the previous version Please see the other volumes in this set How to use iSBEM Basics UK and How to use iSBEM Compliance Assessment UK iSBEM version 5 2 d EPC Generation UK 31Jul14 This manual together with the software tools described in it were developed by the BRE for the Department for Communities and Local Government DCLG Disclaimer The iSBEM User Guide cannot provide legal advice o
38. VS peak power PVS multiplier PVS orientation PVS inclination degrees PVS overshading PVS ventilation strategy Tab Wind Generators Sub tab General e Wind generator name e Terrain type e Horizontal axis o Diameter of blades m e Other axis o Area swept by blades m e Hub height m e Wind generator power kW Tab CHP Generator Sub tab General Fuel type Heat efficiency Electrical efficiency CHPQA Quality Index of building space heat supplied by CHP 81 iSBEM version 5 2 d EPC Generation UK 31Jul14 e of building hot water supplied by CHP e 6ls it a tri generation system o of building space cooling supplied by CHP o Chiller efficiency Tab Solar Collectors Sub tab General SC name SC type SC control type SC shading factor TSC type TSC operation TSC absorptivity NTSC collector height m NTSC air temperature coefficient K W m Air flow rate coefficient ub tab Air flows Is SC provided with independent fan o SC supply specific fan power W I s e SC design air flow rate m s emneerkseeee geeee ee Tab Zones Sub tab HVAC HWS and Lighting systems HVAC system which services the zone Are there de stratification fans in the zone HWS which serves the zone Dead leg length for HWS in the zone m Sub tab Ventilation e Zonal ventilation system natural or mechanical field enabled if there is no mechanical ventilation at HVAC level o Specific fan power for supply amp ext
39. ab In this sub tab you need to enter details about the air conditioning system in the building if applicable as shown in Figure 14 This data is used by SBEM purely for reporting purposes in the XML file for lodgement and is not used during the calculation 1 Tick box to indicate if the building has an air conditioning system If the box is ticked the following parameters become active a Tick box to indicate if the total effective rated output of the air conditioning system is Known e f the actual output is known the box should be unticked and the value should be entered in kW into the box which becomes active Further guidance can be accessed by clicking on the adjacent El button e fthe actual output is unknown the box should be ticked and a value for an estimated range should be selected from the options in the drop down menu which becomes active Further guidance can be accessed by clicking on the adjacent 7 button b Has an air conditioning inspection been commissioned for compliance with Energy Performance of Buildings Regulations Select an option from the drop down menu 31 iSBEM version 5 2 d EPC Generation UK 31Jul14 Building Services Ratings Building Navigation General Project Database Geometry About iSBEM Global and Defaults HVAC systems Hws SES Pvs __ Wind generators CHP generator Transpired solar collectors Zones Building services detail for the whole Pr
40. ade B and grade C is set at the SER and given an AR of 50 This means that a gas heated building with mixed mode cooling that is just compliant with Part L 2006 would have an Asset Rating of 50 AR lt 0 0 gt A 00 lt AR lt 250 gt 4 25 0 lt AR lt 50 0 gt 5 50 0 lt AR lt 75 0 gt C 75 0 lt AR lt 100 0 gt D 1000 lt AK 1250 125 0 lt AR lt 150 0 gt F 150 0 lt AR gt G Table 1 Asset rating and energy bands in England Wales and Northern Ireland More details on the calculation procedure required by the NCM and the definition of the rating scale are explained in more detail in the NCM Modelling Guide available from www ncm bre co uk Further information on EPCs including the treatment of communal areas that accompany units with independent heating systems can be found in DCLG s publication Improving the energy efficiency of our buildings A guide to energy performance certificates for the construction sale and let of non dwellings which can be accessed from https Awww gov uk government publications energy performance certificates for the construction sale and let of non dwellings 2 This document provides an introduction to energy performance certificates for non dwellings describes the scope and requirements of the regulations that apply on construction sale or let and provides guidance on how these are applied in practice NB While no EPCs are required for permanently unconditioned buildi
41. are o Landmark s National Non Domestic Energy Performance Register for England and Wales www ndepcregister com IP 81 17 74 226 o Landmark s National Non Domestic Energy Performance Register for Northern Ireland www epbniregisternd com IP 81 17 74 228 o Wwww epcgent net IP 80 71 22 50 Ensure that your name is on the National Register of accredited non domestic energy assessors www ndepcregister com for England and Wales and www epbniregisternd com for Northern Ireland that your assessor number input into the tool is exactly as it appears on the National Register e g do not confuse the letter O with the number 0 in your assessor number If any of these details need amendment contact your Accreditation Scheme Provider Ensure that the EPC calculation in iSBEM has completed successfully i e that it has not crashed with any errors before completion If not examine the error files err and correct the errors before proceeding You can contact your Accreditation scheme Provider for assistance lf you have followed all the above guidance and still the XML file has not been generated contact your Accreditation Scheme Provider 84 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX D Agreed convention for decision on assessment level NB The data below is developed and maintained by Accreditation Scheme Providers so it is constantly evolving and assessors are advised to contact their scheme provide
42. ation tab Please note that the EPC and Recommendations Report produced on your computer will always contain the watermark However this does not apply if EPC Scotland has been selected as the Purpose of Analysis when the XML is always generated if the calculation runs successfully and the EPC documents generated on your computer are not watermarked NB See APPENDIX C Connection to the National Register for more quidance 4 2 1 SBEM Main Output Document Guidance on this document is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 2 Data Reflection Report Actual Building Guidance on this document is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 3 Data Reflection Report Notional Building Guidance on this document is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 4 Technical Output Report Actual Building Guidance on this document is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 5 Technical Output Report Notional Building Guidance on this document is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 6 Energy Performance Certificate This report can be accessed from the Ratings form gt Asset Rating tab gt Building Rating
43. be unconditioned This applies regardless of whether they are actually occupied or are inaccessible This convention only applies for the assessment of EPCs Convention For EPCs Boundary of assessed building when other buildings adjoin Where there is a party wall between buildings this is deemed in compliance with the RICS definition of internal areas to be a perimeter wall and therefore horizontal dimensions should be measured to the inside face from the side of the building being assessed NB If surfaces of the room are not rectilinear for example if a pitched roof is exposed to the inside of the conditioned zone i e there is no flat ceiling underneath it then the roof area will be that of the inner surface area of the roof as seen by the heat flux Convention For EPCs Dimension conventions See APPENDIX E for the treatment of other rooms with non rectilinear surfaces Windows amp Doors Summary sub tab Guidance on this sub tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 4 4 Defining windows and rooflights Windows amp Rooflights tab Guidance on input in this tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 28 iSBEM version 5 2 d EPC Generation UK 31Jul14 3 4 5 Defining doors Doors tab Guidance on input in this tab is the same as that provided in the User Guide volume
44. buildi Comments HVAC for the example building Add weather compensation controls to heating system Code EPC H8 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to HVAC for the example building Comments 70 iSBEM version 5 2 d EPC Generation UK Add weather compensation controls to heating system Page 2 of 4 31Jul14 Recommendations for COOLING COOLING accounts for 24 8 of the CO2 emissions The overall energy performance of COOLING provision is FAIR The overall CO2 performance of COOLING provision is FAIR The average energy efficiency of COOLING provision is GOOD The average CO2 efficiency of COOLING provision is GOOD There are no recommendations for COOLING Recommendations for HOT WATER HOT WATER accounts for 12 4 of the CO2 emissions The overall energy performance of HOT WATER provision is GOOD The overall CO2 performance of HOT WATER provision is GOOD The average energy efficiency of HOT WATER provision is GOOD The average CO2 efficiency of HOT WATER provision is GOOD There are no recommendations for HOT WATER Recommendations for LIGHTING LIGHTING accounts for 37 4 of the CO2 emissions The overall energy performance of LIGHTING provision is GOOD The overall CO2 performance of LIGHTING provision is GOOD Consider replacing T8 lamps with retrofit T5 conversion kit Code EPC L5 Energy Impact MEDIUM CO2 Impact HIGH CO2 Save
45. co uk A description of the contents of the NCM Construction Glazing or Activity databases A detailed description of SBEM the calculation engine to which iSBEM is an interface This is described in the SBEM Technical Manual available for download from the NCM website at www ncm bre co uk How to set up ISBEM to operate on your computer how to assemble the required information for your own building how to zone your building or how to convert files created with previous versions of iSBEM version to be compatible with the current version This can be found in the User Guide volume How to use iSBEM Basics UK A tutorial This can be found in the User Guide volume How to use iSBEM Compliance Assessment UK Guidance related to energy calculations for the Republic of Ireland Building Regulations or those for the States of Jersey This manual is one volume in a set of documentations for the iSBEM User Guide The other volumes in this set are as follows How to use iSBEM 1 Basics UK Contains an introduction to the use of iSBEM an interface for SBEM Simplified Building Energy Model an approach for the National Calculation Methodology NCM for assessing the energy performance of buildings How to use iSBEM 2 Compliance Assessment UK Contains step by step guidance on the use of iSBEM for the purpose of assessing compliance with the building regulations in the UK for non domestic buildings iSBEM version
46. commendation NB Guidance on editing recommendations When editing recommendations for a particular project you are advised to first run the calculation before editing or removing any recommendations in the Recommendations sub tab Once the calculation has run successfully you can view the official Recommendations Report and identify if there are any recommendations which you feel are not valid for your specific project and you want removed or new ones you want added based on your knowledge of the project Then you can go to the Recommendations sub tab and click on the radio button Only from report in order to display only the recommendations that have been triggered by the calculation for this project rather than all the possible recommendations Out of these recommendations you can then tick to remove any ones that are applicable to the whole building so that they no longer appear on the report You can also add any new ones making sure you set them as applicable to the whole building if you want them to appear on the official report Once you are done editing you can re run the calculation and save your updated nct file EPC Audit sub tab The EPC Audit sub tab Figure 25 contains four sub forms as follows e Construction sub form contains the audit trail information relating to the construction input parameters i e construction specification of walls floors roofs windows rooflights and doors e Geometry sub form
47. cssseeeeesececessessasseeeees 56 4 2 9 SBEM Secondary Recommendations Repott 0 ccicecccceeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenneeeeaaas 56 4 2 10 Accessing the reports from the project fOIDGM 2 ccccccccccccecnsnnennsstseneeeseeeessnassenereeess 57 4 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX A Sample Output Reports cccssecessssseeceeseesccesseeseesseessoees 60 A 1 Sample Energy Performance CertifiCate ccccccccccssssseessssesecccssssaaceeseseeeeseessssaaansees 60 A 2 Recommendations Report for Example Building 1ccccccssceeccscneeeecssnseecssaeeeesssaeesesees 62 A 3 Sample SBEM Secondary Recommendations R DOs ccccsseesseeceesnseeeesesaneesesessaes 69 A 4 Sample Energy Performance Certificate for Scotland 0 cccccsseeeeeeeeeeeeeeeeeneeeeeeeeeees 73 APPENDIX B APPENDIX C APPENDIX D APPENDIX E List of parameters required by iSBEM for EPC calculations 74 Connection to the National Register c cssscsssssessesseeeees 84 Agreed convention for decision on assessment level 85 Agreed convention for determining dimensions 010000 88 5 iSBEM version 5 2 d EPC Generation UK 31Jul14 List of Figures Figure 1 The Local Area Network LAN Settings sub tab cccccccccccccsseeescececeeecanesesececeeeeaaeseseeeeeessaaaaeeeeeeeeas 13 Figure 2 The General Information tab in the General form cccccccccccseecccccccccc
48. ct i e input parameters the Calculate EPC Rating button needs to be clicked on again upon returning to this tab in order to update the results as the results figures cannot be refreshed unless the calculation is re run NB You must close all output files before re running the calculation so the software can over write them Otherwise an error message will be produced Figure 20 shows the Building Rating sub tab in the Asset Rating tab of the Ratings form for EPC England Wales and Northern Ireland are similar and Figure 21 shows the same for Scotland 43 iSBEM version 5 2 d EPC Generation UK 31Jul14 The message at the bottom of the screen indicates that there are no critical un assignments detected in the project If there were the user would need to click on the Objects Report button identify the un assignment make the correction in the appropriate part of ISBEM return to this page and then click the Calculate EPC Rating button Heating Cooling Ausiliaw Lighting Hot Water Total Actual kwh m2 y Notional KWh m2 y Reference CEs C E kwnimaey PattL TER Typical SER BER koCO2 m2 y EPC Rating B C B Click on text below for SBEM Outputs Data Reflection Actual Building Energy Performance Certificate EPC recommendations report Supporting Recommendations Calculation progress Asset rating completed Click to check object assigments there are WO CRITICAL un assigments in the project
49. ct complexity Level 3 m Figure 2 The General Information tab in the General form 14 iSBEM version 5 2 d EPC Generation UK 31Jul14 Project Details sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK In this sub tab the following information can be entered Figure 2 Building Regulations amp EPBD Parameters 1 Purpose of the analysis purpose for carrying out a calculation using SBEM whether it is to generate an Energy Performance Certificate in England or any other country in the UK e g EPC England Type of EPC whether the model created is for the Actual building building as currently is or the Potential building building with potential improvements This parameter is active_only if the Purpose of Analysis parameter is set to EPC Scotland in order to enable the assessor to create a scenario similar to the process applied in the Green Deal Tool which features the selected improvements so that the tool can calculate the potential asset rating which appears on the Scotland EPC NB If the Energy Assessor wants the potential asset rating to be populated on the Scotland EPC and its XML file a scenario for the potential building with the recommended improvements needs to be created and run successfully as described in Section 3 2 3 Obtaining Potential Asset Rating f
50. d be chosen if you do not know system type or detailed parameters IF you do not know heating method ie whether a heated only Building uses electricity or a fuel based heating system select electric resistance heating as your default If wou have more system Information set up another system via the HVAC systems sub tabs ones without H AC system Heating only other systems Should only include unconditioned spaces which hawe no Assumed to be wet radiator system Heat generated by fuel heating or cooling eg plant rooms storage spaces exposed combustion Purnps assumed to be powered by grid electricity circulation spaces Natural L Gad a Heating only Electric resistance Heating and mechanical cooling Heat generated by passing curent through resistance wire Assumed to be constant volume air system with terminal reheat and Electric central heating spstem with warm air distribution Fan fixed fresh air Refrigeration chillers fans pump assumed to be storage heaters and electric fan convectors should be entered powered by grid electricity on the HYAC systems General tab as Other local room Natural G a TE en atural Gas for heating Grid Supplied Electricity for cooling Figure 13 The tabs in the Building Services form 3 5 1 Global and Defaults tab In this tab there are three sub tabs e HVAC System Defaults sub tab e Project Building Services sub tab e Air Conditioning Inspection sub tab This sub tab is visib
51. d element areas Generally zone height is top of slab to top of slab for ground and intermediate floors or soffit eaves level at roof level e For ground and intermediate floors Zone height is top of floor to top of floor e For top floors with flat roof Zone height is top of floor to soffit underside of roof slab e For top floors with pitched roof but flat ceiling Zone height is top of floor to underside of soffit eaves level U value is from under ceiling to outside roof including insulation wherever it is e that is consistent with the area being entered Area of gable wall is that below soffit eaves level ie length L x h4 e For top floors with pitched roof and dropped ceiling with or without insulation at ceiling level Zone height hz is top of floor to underside of soffit eaves level not ceiling U value is from under ceiling to outside roof Side and end wall areas are calculated to soffit eaves level i e dropped ceiling is treated as though it is at soffit eaves level This convention has been adopted to avoid having to determine the relative levels of ceiling and soffit and confusion over where the insulation is placed 89 iSBEM version 5 2 d EPC Generation UK 31Jul14 e For rooms with pitched ceiling e g where ceiling is fixed in line of pitched roof Zone height h is top of floor to U underside of soffit eaves level not average room height
52. d from 1998 onwards a default seasonal efficiency of 0 81 is suggested by the tool based on Statutory Instrument 1994 No 3083 and for boiler systems installed before this period a conservative default seasonal efficiency of 0 65 is suggested Please note that from around 1989 the boiler industry began producing boilers with efficiencies that would have complied with the above statutory instrument 2 Effective heat generating seasonal efficiency If you know the effective heat generating seasonal efficiency for the HWS generator it can be introduced manually into the interface Otherwise a default value will be used by SBEM This field is inactive if the HWS Generator type selected is Same as HVAC The default value is based on the above tick box on whether the generator was installed in or later than 1998 Figure 17 shows a HWS generator being defined General Project Database Geometry Building Services Ratings Building Navigation Global and Defaults HVAC systems HWS ses Pvs wind generators Transpired salar collectors Zones Hw s selector HWS for the example building se General Storage amp Secondary circulation Assigned Bi valent Systems Esa ee Mame JHws for the example building Generator type Dedicated hot water boiler D Tick if the generator is later than 1395 Fuel type Natural Gas Do you know the effective heat generating seasona
53. d per Spent GOOD Applicable to Whole building Comments Introduce HF high frequency ballasts for fluorescent tubes Reduced number of fittings required Code EPC L7 Energy Impact LOW CQ2 Impact LOW CO2 Saved per Spent GOOD Applicable to Whole building Comments Recommendations for RENEWABLES Consider installing building mounted wind turbine s Code EPC R2 Energy Impact LOW Page 3 of 4 1 iSBEM version 5 2 d EPC Generation UK 31Jul14 CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Consider installing PV Code EPC R4 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Recommendations for OVERHEATING There are no recommendations for OVERHEATING Recommendations for ENVELOPE Some walls have uninsulated cavities introduce cavity wall insulation Code EPC E4 Energy Impact LOW CO2 Impact LOW CO2 Saved per Spent POOR Applicable to Whole building Comments Recommendations for FUEL SWITCHING There are no recommendations for FUEL SWITCHING Recommendations for AUXILIARY AUXILIARY accounts for 24 3 of the CO2 emissions The overall energy performance of AUXILIARY provision is FAIR The overall CO2 performance of AUXILIARY provision is FAIR There are no recommendations for AUXILIARY Recommendations for OTHER There are no recommendations for OTHER Page 4 of 4
54. dited Person Details sub tab if the option selected is EPC Scotland 17 iSBEM version 5 2 d EPC Generation UK 31Jul14 This sub tab Figure 5 contains two sub forms Energy Assessor Details sub form and Insurance Details sub form General Project Database Geometry Building Services Ratings Building Navigation About iSBEM File Options General Information Basic information about Project Owner and Energy Assessor F Project details Special considerations EPBD Recast Building details Energy Assessor details Owner details Senne eeeeeeeeenee ee eeeneneeeennGeeeeenanneeseenaaennseenneness Hame My name Import Address My address een City My city Postal Code Nw TAA Telephone number My phone number Email Jemail host cam Accreditation scheme Not accredited Assessor number A CET 1E E EE Clear all Figure 5 The Energy Assessor Details in the General form Energy Assessor Details sub form in this sub form the following information can be entered 1 Name of the energy assessor or qualified accredited person NB The input should be as you want it to appear in the XML file and lodged EPC Address of the energy assessor or qualified accredited person NB The input should be as you want it to appear in the XML file and lodged EPC City of the energy assessor or qualified accredited person NB The input should be as you want it to a
55. domestic space e g a shop or a pub provided that the residential space can only be accessed from within the non domestic space i e the residential part is not designed or altered for use as a Separate independent dwelling In addition to common circulation areas of apartment buildings containing self contained flats these are the only cases where SBEM can be used to model domestic areas For more information on the appropriate software tools to use for modelling your building please refer to DCLG s publication Improving the energy efficiency of our buildings A guide to energy performance certificates for the construction sale and let of non dwellingS which can be accessed as above In Scotland the EPC displays the approximate CQ emissions and energy usage of the building based on a standardised use of the building The Rating is expressed as the CQ emissions in kg per m of floor area per year i e the same as BER and it determines where the building sits on a seven band scale The EPC also includes a list of recommendations for the cost effective improvements lower cost measures of the energy performance Further information is available from the Building Standards Division athttp Awww scotland gov uk Topics Built Environment Building Building standards For Northern Ireland the EPC is very similar to that in England and Wales Please refer to www dipni gov uk for further information on building regulations 11 iSBEM ver
56. e Each space is naturally ventilated irrespective of whether the corresponding space in the actual building has natural or mechanical ventilation The CO emissions arising from the use of the fixed building services in the reference building in kgCO2 m annum are calculated the Reference Emission Rate or RER and then adjusted by an improvement factor of 23 5 This adjusted CO emission rate in kgCO2 m annum is termed the Standard Emission Rate SER i e SER RER 0 765 It is not intended that the definition of the reference building should change as Part L standards change since this would mean that the energy rating of a given building would also change even if its energy efficiency had not been varied Therefore the reference building is always as iSBEM version 5 2 d EPC Generation UK 31Jul14 defined above please refer to the 2013 NCM Modelling Guide available from www ncm bre co uk for the detailed description of the reference building The Asset Rating AR in England Wales and Northern Ireland is simply the ratio of the CQ emissions from the actual building i e the BER to the Standard Emission Rate i e the SER multiplied by 50 The AR should be rounded to the nearest whole number a 50 AR R The Asset Rating is also converted into an energy band grade on a linear A G scale with A being the most efficient followed by A and G being the least efficient Table 1 where the border between gr
57. e entered Building Details 1 UPRN the Unique Property Reference Number UPRN of the building In England Wales and Northern Ireland this parameter consists of 12 digits while in Scotland it consists of 10 digits It should not be left blank Access restriction Specifies if any restrictions are to be imposed on the retrieval of the EPC s XML file from the National Register in Scotland This parameter is active only if the Scottish EPC is selected in the Purpose of the Analysis parameter Inspection Date the date on which the energy assessor inspected the building for the purposes of energy calculations for EPCs Tick box to indicate whether the building has a special conservation status i e the building has been identified as being one of special architectural or historical interest in a conservation area in a designated area of special character or appearance or of traditional construction This parameter is active only if the Purpose of Analysis parameter is set to EPC England EPC Wales or EPC Northern Ireland Energy Assessor Details Qualified Accredited Person Details sub tab The name of this sub tab changes depending on the option selected in the parameter Purpose of Analysis in the Projects Details sub tab as follows e Energy Assessor Details sub tab if the option selected is EPC England EPC Wales or EPC Northern Ireland e Qualified Accre
58. e flat ceiling with U value U ag Zone height New 0 171 x Le including the void above the Wall height Lwc 0 175 x L ceiling Area curved walls Lwc x d x 2 both sides e Treat dormer windows the same as Curved roof width L 1 222 x L for a room in a pitched roof see Area curved roof L x d below e For room in roof or mansard roof e Where there are dormer windows ie window bays that project through the roof Areas and U values should correspond U values for walls should include any voids Uw Uwe Zone height hw height of vertical part of wall If this varies calculate area weighted average height Do not adjust zone height for the dormer windows Zone manually for daylit areas if the glazing gt 20 of vertical wall area Enter the glazing details and areas as normal Note that zoning for daylit areas must be carried out manually in these circumstances 93 iSBEM version 5 2 d EPC Generation UK 31Jul14
59. e iSBEM Compliance Assessment UK 3 5 8 Defining a Solar Collector Solar Collectors tab Guidance on input in this tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 9 Defining the zone specific building services Zones tab Guidance on input parameters in this tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK There are eight sub tabs in the Zones tab 37 iSBEM version 5 2 d EPC Generation UK 31Jul14 e HVAC and HWS Systems sub tab e Ventilation sub tab e Ventilation cont sub tab e Exhaust sub tab e Lighting sub tab e Lighting Controls sub tab e Display Lighting sub tab e Solar Collector sub tab HVAC and HWS Systems sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK The sub tab is used to specify the HVAC system and HWS for each zone The following information is required HVAC System Parameters 1 HVAC Systems Here you need to select from the drop down list of systems you have already defined in the HVAC Systems tab or the default systems the HVAC system which serves the zone If no HVAC system serves the space i e an unconditioned zone select Zones without HVAC system spaces which have no heating or cooling and
60. ected by the energy assessor based on an understanding of the building and or based on a valid existing energy report No recommendations defined by the energy assessor have been identified Page 4 of 7 65 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 4 Next steps a Your Recommendation Report As the building occupier regulation 10 1 of SI 2007 991 requires that an Energy Performance Certificate must be accompanied by a recommendation report You must be able to produce a copy of this Recommendation Report within seven days if requested by an Enforcement Authority under regulation 39 of SI 2007 991 This Recommendation Report has also been lodged on the Government s central register Access to the report to the data used to compile the report and to previous similar documents relating to the same building can be obtained by request through the Non Dwellings Register www epcregister com using the report reference number of this document b implementing recommendations The recommendations are provided as an indication of opportunities that appear to existto improve the building s energy efficiency The calculation tool has automatically produced a set of recommendations which the Energy Assessor has reviewed in the light of his her knowledge of the building and its use The Energy Assessor may have comments on the recommendations based on his her knowledge of the building and it
61. ed General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Project Zones Envelope Doors Windows amp Rooflights Notes entered at the user s discretion about the zone Zone selector 20 0least lapie Ei E Ap En A description of the selected General i ne Buick Envelopes Envelope Summary activity area as it appears in the NCM Activity database User s notes a Selected buildi Ng 070l eas Multiplier T The coffee shop on the ground floor P 1 type for this core and east permeter area zone HVAC ki the example building Building Type JAS A4 A5 Restaurant and Cafes Drinking Establishment Description of Activity from NCM database Selected activity Activity E ating drinking EE Areas where food or drink are type for this consumed Thie could include open Area 162 m2 Fir to flr height 3 camidors or stairs providing access to the Zone rins a an main eating drinking spaces P rek ithe tse shellletes Infiltration Thermal Bridges i C No use default value 25 msh me W Tick here to use Global Psi values f es Air permeability at 50pa iz a 3 mah ne Record H 1 of 19 E H W Unfiltered Search Figure 12 A zone being defined in the General sub tab of the Zones tab in the Geometry form Thermal Bridge sub tab Guidance on input in this sub tab is t
62. ed if envelope type is roof or floor ceiling o Perimeter length m field enabled if envelope type is wall Envelope connects space to or select global value Envelope construction Envelope area mf Envelope orientation Is there a solar collector SC on this wall field enabled if envelope type is wall o SC name o SC area m e Definition of any thermal bridges in the envelope additional to global values o Thermal bridge multiplier o Thermal bridge length m o Thermal bridge Psi W mK o Thermal bridge description Tab Doors Sub tab General Door name Envelope which door is in Door type Door construction Door area mf Definition of any thermal bridges in the door additional to global values Thermal bridge multiplier o Thermal bridge length m o Thermal bridge Psi W mK o Thermal bridge description O Tab Windows amp Rooflights Sub tab General Window Rooflight name Envelope which window rooflight is in Glazing type Window Rooflight projected area m Ratio of developed area to projected area of window rooflight Ratio of roof area covered by rooflight array to area of rooflight glazing Is it a display window Frame factor Aspect ratio Shading position on window rooflight o Shading colour o Shading translucency e Transmission factor due to fins and overhangs e Is overhand a brise soleil e Definition of any thermal bridges in the window rooflight additional to global values o Thermal bridge multiplier o The
63. eeeeeeeceeeeeeeeseeeeeeeaaeeeseeeeseeaaaaaseeeceeesaaaaaaeees 50 Figure 25 The EPC Audit sub tab in the Asset Rating tab Of the Ratings fOrim ccccccccccccccccscnesecseceseeeeaaeeeees Fi Figure 26 The Calculation Logs sub tab in the Asset Rating tab of the Ratings fOvM ccccccccseeeeececeseeennees 32 Figure 27 The Calculation Errors sub tab in the Asset Rating tab of the Ratings form cccccccccccccccseeneeeeeees 53 Figure 28 Contents of the Projects folder showing the SBEM output reports when running SBEM for Energy Performan sares E ooo GI esc c ccc c acca nssssessesseceecccsecaeeeeuacasssseeseeeeeeeeeaaes 59 List of Tables iSBEM version 5 2 d EPC Generation UK 31Jul14 Acronyms used in ISBEM and this guide AHU Air Handling Unit BER Building Emission Rate BRUKL Building Regulations United Kingdom Part L The Building Regulations compliance checking module CCHP Combined Cooling Heat and Power CEN Comite Europ en de Normalisation The European Committee for Standardisation CHP Combined Heat and Power COs Carbon dioxide ECA Enhanced Capital Allowance EER Energy Efficiency Ratio EPBD Energy Performance of Buildings Directive EPCgen Energy Performance Certificate Generator The EPC generator module ETL Energy Technology List HEPA High Efficiency Particulate Air HTHW High Temperature Hot Water boiler HVAC Heating Ventilation and Air Conditioning HWS Hot Water System IF Improvement Factor ISBEM Inte
64. eland your computermust be connected to the internet and you need to enter your assessor number into the General form gt General Information tab gt Energy Assessor Details sub tab gt Energy Assessor Details sub form see Section 3 2 2 General Information tab If there is no internet connection then the XML message will not be generated Please note that the EPC and Recommendations Report produced on your computer will always contain the watermark However this does not apply if EPC Scotland has been selected as the Purpose of Analysis when the XML Is always generated if the calculation runs successfully and the EPC documents generated on your computer are not watermarked NB See APPENDIX C Connection to the National Register for more guidance and trouble shooting steps General Project Database Geometry Building Services Ratings Building Navigation About SBEM File Options General Information l Actions iF File operations System configuration System configuration cont Local Area Network LAN Settings Helpline diagnosis Proxy Server Use a proxy server for your LAN Figure 1 The Local Area Network LAN Settings sub tab 13 iSBEM version 5 2 d EPC Generation UK 31Jul14 Helpline Diagnosis sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 3 2 2 General Info
65. electric resistance heating as your default e Heating only Other systems Assumed to be a wet radiator system with heat generated by fuel combustion Pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in the Building Services form gt Global and Defaults tab gt HVAC System Defaults sub tab see Section 3 5 1 Global and Defaults tab e Heating and mechanical cooling Assumed to be a constant volume air system with terminal reheat and fixed fresh air Refrigeration chillers fans and pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in theBuilding Services form gt Global and Defaults tab gt HVAC System Defaults sub tab See Section 3 5 1 Global and Defaults tab NB The default HVAC systems in iSBEM are representative of existing rather than new buildings and should only be used if you are running an EPC calculation for an existing building not a new building and do not know the type of the HVAC system in your building or its detailed parameters as the default efficiencies assumed by iSBEM for them are quite pessimistic and cannot be edited by the user NB The domestic type activities available under the building type Residential spaces in ISBEM are to allow the energy calculations for the generation of one EPC for a building which 26 iSBEM version 5
66. endations may be based on uncertain assumptions These recommendations do not cover the quality of operation or maintenance of the building and its systems There are frequently significant opportunities for energy and carbon savings in these areas and a full energy audit to identify them is strongly recommended NB Once a recommendation has been edited by the user it can no longer be displayed in the Recommendations report as being automatically generated by the calculation and so cannot appear in any of the first 3 tables It must appear in the fourth table containing the users added or edited recommendations This is the case if the tick to edit box is ticked for any particular recommendation even if no changes are actually made or comments are added by the user after ticking the box 49 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation Asset Rating EPC England About iSBEM ai Delete Reccommendation Recommendation Category OTHER H Code USER Energy impact UNKNOWN Assessor commenta CO impact UNKNOWN CO2 saved per spent UNKNOWN Payback Applicable to BUILDIMNG Pay back pear UNKN Ow k Record H lofl E RR i o Filte Search Figure 24 The Recommendations sub tab in the Asset Rating tab of the Ratings form showing the active fields for creating a user defined re
67. endations removed by the Energy Assessor from the official Recommendations Reportwill still appear in the SBEM Secondary Recommendations report See APPENDIX A A 3 for a sample SBEM Secondary Recommendations Reportfor the Example building 4 2 10 Accessing the reports from the project folder All of the above reports are accessible from the specific project folder created when the project was first created in the User Guide volume How to use iSBEM Basics UK The default location for this folder is within the main Projects folder within the iSBEM_v5 2 d folder e g C NCM ISBEM_v5 2 d Projects Example building complete The reports have the following file names and extensions Output reports when running SBEM for Energy Performance Certificates 1 SBEM Main Output Document project name sbem pdf Energy Performance Certificate project name _epc epc pdf EPC Recommendations Report project name _epc rec pdf Data Reflection Report Actual Building project name dr htm Data Reflection Report Actual Building project name _dr pdf Technical Output Report Actual Building project name _sim csv Technical Output Report Notional Building project name not_sim csv Technical Output Report Reference Building project name ref_sim csv OO Oh oe 0 57 iSBEM version 5 2 d EPC Generation UK 31Jul14 9 SBEM Secondary Recommendations Report pro
68. eneral Project Database Geometry Building Services Ratings Building Navigation About iSBEM ACTUAL SCOTLAND EPC es Options General Information Basic information about Project Owner and Agent Tp Project details Additional project details Special considerations EPBD Recast Building details Qualified Accredited Person details t l Building Regulation Bye Laws amp EPBD parameters Purpose of the analysis EPC Scotland x Type of EPC Actual el Actual EPC for Tick to additionally check Building Regulations building as currently IS Weather location Scotland liil Potential EPC for Stage of analy 4s built building with selected SE type of building Other buildings recommended Only for Wat Yent buildings Occupied period temperature always below 281C improvements Main renewable sorce From calculation MW Tick if mains gaz supply is available to development site Figure 7 Type of EPC for Scotland EPC for actual and potential buildings In order to generate the potential asset rating with the recommended improvements this will necessitate creating a scenario in iSBEM and then implementing the selected improvements to the building model The format of the software tool in this mode is very similar to that used for Green Deal assessments in the GDTool www ncm sbem org uk so should be familiar to assessor
69. enerated by EPCgen by adding comments and or modifying the calculated impacts using the following parameters 2 Click to edit this recommendation By ticking this tick box you indicate that you wish to edit this particular NCM recommendation whose text can be viewed in the grey box entitled Recommendation generated by EPCgen If the box is ticked the following fields become active a Assessor Comments You can enter any comments related to the recommendation for e g the reason why you have chosen to edit this NCM recommendation These comments will appear in SBEM s Secondary Recommendations report not the official Recommendations report 46 iSBEM version 5 2 d EPC Generation UK 31Jul14 Energy Impact You can select from the options available in the drop down menu in order to specify the potential impact of implementing the recommendation on the energy performance of the actual building HIGH change in total building energy is gt 4 MEDIUM change in total building energy is lt 4 and gt 0 5 LOW change in total building energy is lt 0 5 COs Impact You can select from the options available in the drop down menu in order to specify the potential impact of implementing the recommendation on the COs emissions of the actual building HIGH change in total building CQ emissions is gt 4 MEDIUM change in total building CO emissions is lt 4 and gt 0 5 LOW change in total building CO emission
70. enessseceeeeeeaaeesseeeeeesaaaaeeeeeeeseaaaes 14 Figure 3 The Additional project details sub tab of the General Information tab in the General form 16 Figure 4 The Building Details sub tab of the General Information tab in the General fO1M ccceseeeeeeees 17 Figure 5 The Energy Assessor Details in the General fOrinn iccccccccccccsccccccccccccseseccsecceeeeeaessseeeceeeeaaaeeseeceseeeaaaes IS Figure 6 Insurance Details in the General form cccccccccccsseeccccccceee a eeseeeceeeeeaaeeseeeeeeeeaaeeeeeeeeeeeaaaeaseseeeeeeaaaes 20 Figure 7 Type of EPC for Scotland EPC for actual and potential buildings cccccccccccccssssseeeeeeseseeeeeeesseseneaes 21 Figure 8 General form gt Potential Measures tad cccccccccccccccccccceseeeecsecceeeen a eeseeeeeeeeaaeneeeeeeeeaaaaaseeeesessaaaaassees 22 FENES INCW SCONGII OE TE E E E A A 22 Fieure dO NeWunprovem eIn MEAS UTE TIE EAE E A EA ER 23 Figure 11 General amp Geometry sub tab of Project tab in the Geometry fJO fM sooooeonnnsnnnnnnnnsssseennnnsssseeennns 293 Figure 12 A zone being defined in the General sub tab of the Zones tab in the Geometry fOTM 010000008s 27 Figure 13 The tabs in the Building Services form c csscccccccceenssess cfm sscccccennsnessccccscenssssescccceeenssesssceees 30 Figure 14 Air Conditioning Inspection sub tab of the Global and Defaults tab in the Building Services form 32 Figure 15 HVAC systems definition Heating sub tab
71. er to specify the typical payback time for implementing the recommendation in the actual building LONG payback is gt 7 years MEDIUM payback is gt 3 years and lt 7 years SHORT payback is lt 3 years NB If you enter the value as UNKNOWN SBEM will set it to LONG If you know the exact figure for payback time in years use the next parameter instead i Payback number Here you can input in years the typical payback time for implementing the recommendation in the actual building If you do not know the exact figure for payback time in years use the previous parameter instead j Applicable to Here you can specify the object to which the recommendation applies for e g the whole building or a particular HVAC system or HWS If the option selected is either HVAC SYSTEM or HWS then the following parameter becomes active i Name You need to specify the name of the particular HVAC system or HWS already defined in iSBEM to which the user defined recommendation refers NB Only recommendations that are defined as applicable to the whole building i e the parameter Applicable to has been set to BUILDING appear in the official Recommendations report All the defined recommendations however will appear in SBEM s Secondary Recommendations report 5 Delete Recommendation This button allows you to delete a user defined recommendation 48 iSBEM version 5 2 d EPC Generation UK
72. ern Ireland 8 SBEM Secondary Recommendations Report As described previously the first four reports are accessible from within iSBEM using the appropriate buttons or hyperlinks in the Ratings form gt Asset Rating tab gt Building Rating sub tab These reports are all stored in the same location as the project files along with the Technical Output Reports which can only be accessed from the Projects folder The default 53 iSBEM version 5 2 d EPC Generation UK 31Jul14 location for the project files is within the specific project folder created when the project was first created see in the User Guide volume How to use iSBEM Basics UK within the ISBEM_v5 2 d folder e g C NCM iSBEM_v5 2 d Projects Example building complete One more file is produced when running the asset rating calculation and generating an EPC This file is the XML message required for the official submission lodgement of the EPC with the National Register It contains all the data used in the generation of the Energy Performance Certificate and the EPC Recommendations report Please note that in order to generate the XML message for official lodgement in England Wales and Northern Ireland your computer must be connected to the internet and you need to have entered your assessor number into the General form gt General Informationtab gt Energy Assessor Details sub tab gt Energy Assessor Details sub form see Section 3 2 2 General Inform
73. f the NCM recommendation This text will appear in the Recommendations report Applicable to This describes the object to which the recommendation applies for e g the whole building or a particular HVAC system or HWS 3 Click to take out By ticking this tick box you indicate that you wish to remove this particular NCM recommendation which was generated by EPCgen from the Recommendations Report If the All USER radio button is selected in the Show recommendations box or the Add new record button at the bottom of the screen is clicked then iSBEM will prompt you to create a new recommendation 4 Once you have confirmed that you do wish to add a recommendation to the ones already generated by EPCgen then the following fields become active Figure 24 a Category You can select from the options available in the drop down menu in order to specify the category under which the recommendation will be classified Code This parameter remains set to USER for any user defined recommendation Recommendation You can enter text to describe the newly added recommendation This text will appear in the Recommendations report Assessor Comments You can enter any comments related to the recommendation for e g the reason why you have chosen to add this NCM recommendation These 47 iSBEM version 5 2 d EPC Generation UK 31Jul14 comments will appear in SBEM s Secondary Recommendations
74. field not enabled for EPC Scotland o Is there monitoring and testing with alarm for out of range values field enabled if HVAC system has provision for metering Sub tab Bi valent Systems Heat source Fuel type for heat generator Effective heat generating seasonal efficiency for heat generator Proportion of heating load provided by heat generator Sub tab System Controls Does the HVAC system have central time control Does the HVAC system have optimum stop start control Does the HVAC system have local time control Does the HVAC system have local temperature control Does the HVAC system have weather compensation control Tab HWS Sub tab General e HWS name e HWS generator type o Fuel type for HWS generator field enabled if hot water is not generated by HVAC system o Effective heat generating seasonal efficiency for HWS generator field enabled if hot water is not generated by HVAC system o Was the HWS installed later than 1998 relevant only if default efficiency value is used field enabled if hot water is not generated by HVAC system Sub iab Storage amp Secondary Circulation e ls the system a storage system o Storage volume litres o Insulation type on storage vessel B Insulation thickness mm or o Storage losses MJ month o Does the system have secondary circulation B Circulation losses W m B Pump power kW B Loop length m B Is there time control on the secondary circulation Sub tab Bi valent Syste
75. for reference A short description of the measure may also be entered in the Description field such as what change it entails see Figure 10 21 iSBEM version 5 2 d EPC Generation UK 31Jul14 About iSBE M General Project Database Geometry Building Services Ratings Building Navigation ACTUAL SCOTLAND EPC File Options General Information Potential Measures _ ay w Record selector o Select action or SCENARIO from the list General Improveme Create new Scenario based on BASELINE Mame Based on scenario BASELINE Created on e Description Record H 1 of 1 Fl i No Filter Search Figure 8 General form gt Potential Measures tab About iSBE M General Project Database Geometry Building Services Ratings Building Navigation New Scenario File Options General Information Potential Measures Record selector Hew Scenaro Name EEEE Created on 15 01 2014 14 09 34 Based on scenario MASELINE Description Record H 1 of 1 Fl ix ho Filter search Figure 9 New scenario 22 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation New Scenario MEASURE Measure 1 About iSBEM Record selector New Scenario z gt T P General Improvements Measure 1 DESCRIPTION Replace T8 lamps with T5 T kWh m Heating
76. g plant rooms storage spaces exposed circulation spaces If you do not know the type of the HVAC system in your existing building or its detailed parameters you should instead select one of the following default options from the drop down menu see Section 3 4 2 Defining zones Zones tab e Heating only Electric resistance Heat generated by passing an electric current through resistance wire Assumed to be electric central heating system with warm air 32 iSBEM version 5 2 d EPC Generation UK 31Jul14 distribution Fan storage heaters and electric fan converters should be input by defining an HVAC system in the Building Services form gt HVAC systems tab gt General sub tab and selecting the system type Other local room heater fanned see below If you do not know the heating method i e whether a heated only building uses electricity or a fuel based heating system you should select electric resistance heating as your default e Heating only Other systems Assumed to be a wet radiator system with heat generated by fuel combustion Pumps assumed to be powered by grid supplied electricity If you know the fuel type used by the heating system you can define it in this sub tab Figure 13 e Heating and mechanical cooling Assumed to be a constant volume air system with terminal reheat and fixed fresh air Refrigeration chillers fans and pumps assumed to be powered by grid supplied electricit
77. g strategy of the property e Introduction contains information on the calculation tool used e Recommendations contains a list of recommendations edited by the energy assessor for the improvement of the energy performance of the building and their respective potential impact on the COQ emission rate of the building The recommendations are grouped into the following sub sections short payback up to 15 recommendations medium payback up to 10 recommendations long payback up to 5 recommendations and other recommendations created by the energy assessor up to 10 recommendations NB Only recommendations that are defined as applicable to the whole building i e the parameter Applicable to has been set to BUILDING appear in the official Recommendations report All the defined recommendations however will appear in SBEM s Secondary Recommendations report e Next Steps contains information on the steps that need to be taken following the production of the reports e Glossary contains definitions of some of the terms used in the report See APPENDIX A A 2 for a sample Recommendations Reportfor the Example building NB You must close all output files before re running the calculation so the software can over write them Otherwise an error message will be produced NB The NCM recommendations are generated for the building and its energy systems when operated according to standard schedules appropriate to the ge
78. generator 3 The resulting annual CO emissions kgCO m from the actual building BER the target Part L TER the typical building Stock average TYP and the standard emission rate SER For details on the definition of the reference and typical buildings SER and Part L target see Section 2 1 UK Energy Performance Certificate purposes and the 2013 NCM Modelling Guide 4 The EPC bands corresponding to the annual CQ emissions from the actual building the SER the target Part L TER and the typical building Stock average TYP 5 The EPC Rating Asset Rating of the actual building Also accessible from this sub tab is the Energy Performance Certificate the Recommendations Report the SBEM Main Output report the Data Reflection Report for the actual building and supporting recommendations in the form of a secondary not for official submission report only available for the generation of EPCs for England Wales and Northern Ireland See Sections 4 2 1 SBEM Main Output Document 4 2 2 Data Reflection Report Actual Building 4 2 6 Energy Performance Certificate 4 2 7 Recommendations Report and 4 2 9 SBEM Secondary Recommendations Report NB The Data Reflection Reports in html format are generated and the related access buttons become visible in the Ratings form only if the relevant box has been ticked in the General form gt File Options tab gt System Configuration sub tab NB If any changes are made to a proje
79. he same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Envelope Summary sub tab Guidance on this sub tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 21 iSBEM version 5 2 d EPC Generation UK 31Jul14 3 4 3 Defining envelopes Envelope tab Guidance on input parameters in this tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK The main Envelope tab contains two sub tabs General sub tab Window amp Door Summary sub tab General sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK For each envelope element you will need to click into the General sub tab of the Envelope tab create a new record and add the following information 1 Connects space to sometimes referred to as adjacent condition Here you need to select what conditions apply on the other side of the wall floor or ceiling roof Convention For EPCs Adjacent condition of adjoining buildings Unless evidence to the contrary is readily and easily available all buildings adjoining that building or part building which is being assessed are assumed to be conditioned unless they are of Planning Class B2 to B8 in which case they are assumed to
80. iciency of 0 81 is suggested by the tool based on Statutory Instrument 1994 No 3083 and for boiler systems installed before this period a conservative default seasonal efficiency of 0 65 is suggested Please note that from around 1989 the boiler industry began producing boilers with efficiencies that would have complied with the above statutory instrument Convention For EPCs Electric room heaters Any form of fanned or unfanned electric room heater whether panel bar convector or storage heater shall have a user inout heat generating seasonal efficiency of 1 i e 100 efficiency Figure 15 shows a heating system being defined www eca qgov uk etl 33 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM _Global and Defaults HVAC systems Hws SES PYS Wind generators l Transpired solar collectors Zones Record selector H AC for the example building fal Tc z T General Heating Cooling System Adjustment Metering Provision System Controls Bivalent Systeme Zone Summary Heating system Heat source LTH boiler x Tick if this system also uses CHP Fuel type Natural las zi Do pou know the effective heat generating seasonal efficiency No use default value 0 89 Does it qualify for UK ECAs at a 4 Yes seasonal efficiency is ECA list
81. impact of the exterior on those zones In this case it should not be maintained to conditions as though it is occupied If it is conditioned and the features below do not apply in this context it is not considered to be an atrium e Providing a means for daylight to reach the middle of deep plan spaces that would otherwise not receive it e Encouraging stack effect or other passive ventilation to draw extract air from the adjoining spaces Automatic Blind Control In this context internal or inter pane but not exterior blinds that are motorised so that the position can be modified to control solar heat gain and or glare controlled by automatic sensors The control regime must also open the blinds as the heat gain and or daylight levels decrease so that the use of these natural resources can be optimised for each zone Note that exterior shading devices can be modelled using isBEM in the definition of each window however SBEM currently does not model the re radiation effects of blinds where solar gain has entered the space before it is modulated by the shading device Demand Controlled Ventilation Is defined as supply and or extract ventilation that is modulated to match the needs of the actual occupation level of each zone rather than operating at a constant level defined by the activity database Thus the energy required to adjust the condition of the supply air and that required to move the air can be reduced The rate of ventilation would
82. ing the Calculate EPC rating button in the Asset Rating tab gt Building Rating sub tab NB You will be able to monitor on the screen the progress of the calculation process as it is carried out for the different building objects 1 View the key results within the interface 2 Access the following output reports the Energy Performance Certificate the Recommendations Report the SBEM Main Output report SBEM Secondary Recommendations Report and the Data Reflection Report for the actual building The Ratings form is composed of one tab which is e Asset Rating tab displays the CO emissions in kg per m of building area for the actual and typical buildings Part L TER and SER along with their corresponding EPC bands It also displays a break down of the annual energy consumption by end use for the actual notional and reference buildings in KWh nf 4 1 1 Asset Rating tab The Asset Rating tab has the following sub tabs e Building Rating sub tab e Graphic Rating sub tab e Recommendations sub tab e EPC Audit sub tab e Calculation Logs sub tab e Calculation Errors sub tab e Supporting Documents sub tab 42 iSBEM version 5 2 d EPC Generation UK 31Jul14 Building Rating sub tab The Asset Rating is calculated by clicking on the Calculate EPC Rating button This runs the data through the SBEM calculation engine and the Energy Performance Certificate Generator EPCgen NB Please note that in order to ge
83. io containing all the recommended improvement measures in a single package 7 After the calculation has completed successfully the potential asset rating for the building with the recommended improvements will appear in the relevant section on the actual building s EPC which is generated on the user s computer and it will also be recorded on the generated XML file so that it can appear on the official EPC generated at the Scottish National Register after lodgement 3 3 Project Database form Guidance on input in this form is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 23 iSBEM version 5 2 d EPC Generation UK 31Jul14 3 4 Geometry form Guidance on input parameters in this form not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 4 1 Project tab This tab consists of the following two sub tabs e General amp Geometry sub tab e Thermal Bridges sub tab General amp Geometry sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK This sub tab requires the input of the following information as shown in Figure 11 Building Infiltration Global 1 Air permeability at 50 pa m h m If the purpose of analysis option that has been selected in the General form gt
84. iry date Policy cover limit Sub tab Owner s details Name Telephone number Address City Postcode Form Project Database Tab Construction for walls Sub tab General Name of construction Does it involve metal cladding Globally used in walls that connect zone to Definition of construction of walls using one of the following 3 options 1 Library o Category o Library or 2 Inference procedures o Building sector o Building Regulations compliance o General description or 3 Enter parameters manually o U value W m k Km kJ m kK Tab Construction for roofs Sub tab General Name of construction Does it involve metal cladding Globally used in roofs that connect zone to Definition of construction of roofs using one of the following 3 options 1 Library o Category o Library or 2 Inference procedures o Building sector o Building Regulations compliance o General description or 3 Enter parameters manually o U value W m k Km kJ m kK Tab Construction for floors Sub tab General e Name of construction e Globally used in floors that connect zone to e Definition of construction of floors using one of the following 3 options 15 iSBEM version 5 2 d EPC Generation UK 31Jul14 1 Library O O or Category Library 2 Inference procedures O O O or Building sector Building Regulations compliance General description 3 Enter parameters manually O O O Tab Constructi
85. issions benchmarks The same graph is also displayed on the Energy Performance Certificate 45 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Asset Rating EPC England Fe EPC rating Part L TER Typical Less energy efficient Figure 22 The Graphic Rating sub tab in the Asset Rating tab of the Ratings form Recommendations sub tab Once the Asset Rating has been calculated successfully the EPCgen module produces the EPC and the Recommendations Report The latter contains the NCM and user defined recommendations for energy efficiency improvements to the actual building This sub tab Figure 23 contains the following parameters 1 There are 4 radio buttons in a box entitled Show recommendations a All NCM Click this button to view only the NCM recommendations generated by EPCgen b All USER click this button to view only the recommendations added by the user If there are no user defined recommendations then iSBEM will prompt you to add one see below c All Click this button to view both the NCM recommendations and the ones added by the user d Only from Report Click this button to view only the recommendations that have been included in the Recommendations report In addition to creating new recommendations in this sub tab the energy assessor can also edit the NCM recommendations g
86. ject name epc srec pdf XML file when running SBEM for official submission of Energy Performance Certificates will be named as follows 1 XML file for the Energy Performance Certificate and the EPC Recommendations Report EPC reference number xml If the EPC is generated in Welsh as well as in English by ticking the relevant tick box in the General form gt General Informationtab gt Project Details sub tab the file containing the EPC in Welsh will be named as follows 1 Energy Performance Certificate in Welsh project name epcw pdf The project folder for the Example building Complete file is shown in Figure 28 with the output reports highlighted when running SBEM for Energy Performance Certificates Also highlighted is the NCT file which is the file that is read by iSBEM and where all the input data has been stored If you need to share a project with your colleagues this is the only file you need to send them They will be able to open it through iSBEM and generate all the other files Other files highlighted in Figure 28 4 error files with the extension err are highlighted which contain warnings or error messages generated by SBEM or EPCgen during the calculation These are text files which can be opened by any text editor on your computer for e g MS Notepad The contents of these files can also be viewed in theCalculation Errors sub tab in the Ratings form see section 4 1 1 Asset Rating tab
87. l efficiency No use default value 0 65 i Yes seasonal efficiency is 0 55 Record I1 lafi Po HE Search Figure 17 Defining a HWS in the General sub tab 36 iSBEM version 5 2 d EPC Generation UK 31Jul14 Storage amp Secondary Circulation sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Bi valent Systems sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Assigned sub tab Guidance on this sub tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 4 Defining Solar Energy Systems SES SES tab Guidance on input in this tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 5 Defining a Photovoltaic system PVS PVS tab Guidance on input in this tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 6 Defining a wind generator Wind Generators tab Guidance on input in this tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 3 5 7 Defining a CHP generator CHP Generator tab Guidance on input in this tab is the same as that provided in the User Guide volume How to us
88. lation 52 iSBEM version 5 2 d EPC Generation UK 31Jul14 Ratings Building Navigation General Project Database Geometry Building Services About iSBEM Asset Rating EPC England En Building Rating Graphic rating Recommendations ERE Audit Calculation Logs Calculation Errors Supporting Documents _SBEM en EPCgenen BRUKLer ERRORS umber of errors O OWAARAINGS Number of warnings 0 WARNINGS amp Mumber of cwamings 0 END Figure 27 The Calculation Errors sub tab in the Asset Rating tab of the Ratings form Supporting Documents sub tab Guidance on this sub tab is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 4 2 SBEM Output reports Output reports when running SBEM for Energy Performance Certificates lf the calculation were run to generate the Energy Performance Certificate then SBEM produces eight output reports The nine reports produced by SBEM are as follows 1 SBEM Main Output Document Energy Performance Certificate Recommendations Report Data Reflection Report for the Actual Building Technical Output Report for the Actual Building D n R WD Technical Output Report for the Notional Building 7 Technical Output Report for the Reference Building The following additional report is also produced but_only during the generation of the Energy Performance Certificate for England Wales and North
89. lding emission rate kgCO m 41 56 existing stock iSBEM version 5 2 d EPC Generation UK 31Jul14 Administrative information This is an Energy Performance Certificate as defined in S12007 991 as amended Assessment Software iSBEM v5 2 b using calculation engine SBEM v5 2 b 1 Property Reference 000000000000 Assessor Name lt insert name gt Assessor Number ABCD000000 Accreditation Scheme EPCgen NET test AS Employer Trading Name lt insert Employer Trading Name gt Employer Trading Address lt insert Employer Trading Address gt Issue Date 07 Apr 2014 Valid Until 06 Apr 2024 unless superseded by a later certificate Related Party Disclosure Not related to the owner Recommendations for improving the property are contained in Report Reference Number 0000 2090 0040 1000 0803 If you have a complaint or wish to confirm that the certificate is genuine Details of the assessor and the relevant accreditation scheme are on the certificate You can get contact details of the accreditation scheme from the Government s website at www communities gov uk epbd together with details of the procedures for confirming authenticity of a certificate and for making a complaint For advice on how to take action and to find out about C A R B O N technical and financial assistance schemes to help make T R U S T buildings more energy efficient visit www carbontrust co uk or call us on 0800 085 2005 61 iSBEM version 5 2 d
90. le only if EPC generation in England Wales or Northern Ireland is selected as the Purpose of Analysis in the General form gt General Information tab gt Project Details sub tab HVAC System Defaults sub tab lf no HVAC system serves the space i e an unconditioned zone you should select the option Zones without HVAC system as the HVAC system for that zone in theGeometry form gt Zones tab gt General sub tab or the Building Services form gt Zones tab gt HVAC amp HW System sub tab spaces which have no heating or cooling e g plant rooms storage spaces exposed circulation spaces If you do not know the type of the HVAC system in your existing building or its detailed parameters you should instead select one of the following default options from the drop down menu see Section 3 4 2 Defining zones Zones tab e Heating only Electric resistance Heat generated by passing an electric current through resistance wire Assumed to be an electric central heating system with warm air distribution Fan storage heaters and electric fan converters should be input by defining an HVAC system in the Building Services form gt HVAC Systems tab gt General sub tab and selecting the system type Other local room heater fanned If you do not know the heating method i e whether a heated only building uses electricity or a fuel based heating system you should select electric resistance heating as your system 30
91. ls confirmed Other sources Comments Figure 25 The EPC Audit sub tab in the Asset Rating tab of the Ratings form Calculation Logs sub tab Log files for the SBEM calculation GSBEM log and the EPC generator EPCgen EPCgen log can be viewed in this sub tab Figure 26 51 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Asset Rating Building Rating Graphic rating EPC Audit Calculation Logs Calculation Errors Supporting Documente SBEM log EPCgen log BRUKL Jog source Species the INF file or INI file required by the previous r options ppg Password for proxy server e g SBEM exe F inptest inp e g SBEM exe SBEM ini e g SBEM exe F inptest inp pps SBE MM exe v5 2 b 1 Developed by BRE for CLG SBEM v5 2 6 7 RUN on Mon Apr Or 17 17 56 2014 File CAN CMAISBEM v5 2 b Projects E sample building Complete E sample building Complete inp Initializing Default values OF Initializing Default tables OF Initializing standard activity values OF ACTUAL BUILDING Figure 26 The Calculation Logs sub tab in the Asset Rating tab of the Ratings form Calculation Errors sub tab Error files for the SBEM calculation SBEM err and the EPC generator EPCgen EPCgen err can be viewed in this sub tab Figure 27 If the calculation crashes you can refer to these files for any error messages produced during the calcu
92. mal Bridges m Building infiltration Global Building details f No use default value 25 meh rie Zone height Global 3 m f Yes Alr permeability at SUpa is 3 m h m Masimum number of storeys 1 Building area 2900 me Currently total zone area is 2900 m2 Building orientation Building clockwise rotation 0 degrees shea ea haeS e LebSbeM calculate the volume of the building Erge my on value m Figure 11 General amp Geometry sub tab of Project tab in the Geometry form Thermal bridges sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 3 4 2 Defining zones Zones tab Guidance on input parameters in this tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK NB For building regulations calculations purposes we recommend that users generally avoid creating more than 100 150 zones in iSBEM However the processing time will depend on the total number of objects not just Zones i e Zones envelopes windows etc Note that for the asset rating to be calculated for an EPC 3 buildings need to be generated actual notional and reference typical is based on the notional building s performance i e all the objects in the input are multiplied by 3 to give the total number of
93. ms e Heat generator type e Fuel type for heat generator e Effective heat generating seasonal efficiency for heat generator e Proportion of water heating load provided by heat generator Tab SE Systems Sub tab Collector Parameters SES name HWS which SES is in SES area mf SES multiplier SES orientation 80 iSBEM version 5 2 d EPC Generation UK 31Jul14 e SES inclination degrees e Do you know the collector performance parameters according to EN 12975 2 o Zero loss collector efficiency factor o Collector heat loss coefficient W m K o Temperature dependence of heat loss coefficient W mK o Incidence angle modifier of collector Sub tab Solar Storage amp Collector Loop e Solar storage volume litres e Solar pre heating type o Insulation type on storage vessel B Insulation thickness mm e Do you know the heat transfer rate of the heat exchanger s in the collector loop o Heat transfer rate W K e Do you know the overall heat loss coefficient of all pipes in the collector loop o Heat loss coefficient W K Sub tab Auxiliary Energy amp Distribution Losses e Are the distribution pipes between the solar energy system and the back up system insulated field enabled only if the solar pre heating type is a separate solar cylinder e Circulation system o Do you know the nominal power of the pumps B Nominal power of the pumps W Tab PV Systems Sub tab General e PVS name either o PVS type o PVS area m or o P
94. nconditioned NB If none of the zones in the building as defined have space or water heating energy consumption the main heating fuel will be set by the calculation to be Other NB Permanently unconditioned buildings are different to those which are expected to be conditioned later on and which should be modelled as per the guidance in DCLG s publication Improving the energy efficiency of our buildings A guide to energy performance certificates for the construction sale and let of non dwellings which can be accessed from https Awww gov uk government publications energy performance certificates for the construction sale and let of non dwellings 2 NB For Scotland the EPC which has s different format from that in England Wales and Northern Ireland and implements a different methodology for the calculation of the Asset Rating also displays the top 6 of the short payback NCM recommendations If there are user defined or user edited recommendations then the EPC will display up to 3 user recommendations with the shortest payback and the top 3 of the short payback NCM recommendations NB If the Energy Assessor wants the potential asset rating to be populated on the Scotland EPC and its XML file a scenario for the potential building with the recommended improvements needs to be created and run successfully as described in Section 3 2 3 Obtaining Potential Asset Rating for EPC Scotland e Administrative Inf
95. ned a red warning will appear in the top right hand corner to let you know how many zones remain unassigned so that you would not proceed with running the calculation before assigning them NB If a zone is defined as having no heating or cooling i e assigned to Zones without HVAC system but the activity type selected for the zone is one which typically requires conditioning according to the Activity Database ared exclamation mark P will appear next to this parameter as a warning to the user in case this was done in error Ultimately however the calculation will be carried out using the data input by the user If you do not know the type of the HVAC system in your existing building or its detailed parameters when modelling a building for an EPC calculation you should select one of the following default options from the drop down menu see Section 3 5 Building services form e Heating only Electric resistance Heat generated by passing an electric current through resistance wire Assumed to be electric central heating system with warm air distribution Fan storage heaters and electric fan converters should be input by defining an HVAC system in the Building Services form gt HVAC Systems tab gt General sub tab and selecting the system type Other local room heater fanned If you do not know the heating method i e whether a heated only building uses electricity or a fuel based heating system you should select
96. neral activities in the building The Energy Assessor is expected to use his or her knowledge to remove inappropriate ones and possibly to add further ones If the Energy Performance Rating calculation has made extensive use of default values some of the recommendations may be based on uncertain assumptions These recommendations do not cover the quality of operation or maintenance of the building and its systems There are frequently significant opportunities for energy and carbon savings in these areas and a full energy audit to identify them is strongly recommended 4 2 8 Technical Output Report Reference Building This is a comma separated values csv file which can be opened using Microsoft Excel for the reference building similar in format to the technical output report for the actual building described previously see Section 4 2 4 Technical Output Report Actual Building 4 2 9 SBEM Secondary Recommendations Report This report is generated if either EPC England EPC Wales or EPC Northern Ireland were selected as the Purpose of Analysis in the General form gt General Informationtab gt Project Details sub tab and the calculation was run to generate the Energy Performance Certificate It can be accessed from the Ratings torm gt Asset Rating tab gt Building Rating sub tab by clicking on the Supporting Recommendations button and is stored in the same location as the project 56 iSBEM ve
97. nerate the XML message for official lodgement in England Wales and Northern Ireland your computer must be connected to the internet and you need to enter all your assessor details into the General form gt General Information tab gt Energy Assessor Details sub tab gt Energy Assessor Details sub form See Section 3 2 2 General Information tab If there is no internet connection then the XML message will not be generated Please note that the EPC and Recommendations Report produced on your computer will always contain the watermark However this does not apply if EPC Scotland has been selected as the Purpose of Analysis when the XML is always generated if the calculation runs successfully and the EPC documents generated on your computer are not watermarked NB See APPENDIX C Connection to the National Register for more quidance The Building Rating sub tab then displays the following calculated results 1 The energy used per unit floor area kWh nf annually by the actual notional and reference buildings for heating cooling auxiliary energy lighting and hot water 2 The total energy used per unit floor area kWh nt annually by the actual notional and reference buildings in terms of electricity and fuel use NB If applicable this total value includes any energy consumed by a CCHP generator to provide space heating space cooling and or water heating and it is net of any electrical energy displaced by the CCHP
98. ng system present that incorporates centralised air YES supply as an integral component A Level 4 assessment is therefore required A Level 3 assessment can therefore be carried out 85 iSBEM version 5 2 d EPC Generation UK 31Jul14 Accompanying Notes to Assessment Level Decision Flow Chart including agreed definitions NB The data below is developed and maintained by Accreditation Scheme Providers so it is constantly evolving and assessors are advised to contact their scheme providers for the most up to date version Air Permeability Air permeability is expressed as volume flow per hour m h of air supplied to the space per square metre m of envelope area for an internal to external pressure difference of 50 Pa i e 25 m hm at 50Pa Atrium In this context a non continuously occupied interior space within a building often several storeys high bounded on at least one side by occupied spaces set to the conditions determined from the activity database There may or may not be building elements such as glazing surrounding the atrium although there may need to be something for smoke control in case of fire The atrium itself is not maintained to the conditions set by the activity database for adjoining spaces The technical purpose of the atrium can be one or more of the following e Providing a buffer between the thermal conditions in the adjoining spaces and the exterior to reduce the direct
99. ngs i e buildings which do not use energy to condition the indoor climate and are expected to remain this way it is possible to voluntarily lodge EPCs for unconditioned buildings and as such the definition of the reference building was revised See above in order to allow for the calculated energy rating for 10 iSBEM version 5 2 d EPC Generation UK 31Jul14 these types of buildings to be representative Permanently unconditioned buildings are different to those which are expected to be conditioned later on and which should be modelled as per the guidance in DCLG s publication mproving the energy efficiency of our buildings A guide to energy performance certificates for the construction sale and let of non dwelling S which can be accessed as above Buildings with no building services currently installed but which are expected to be installed in the future should be modelled in iSBEM for the purposes of producing an EPC with assumed building services of the types that are most likely to be installed in those class of buildings and which have the minimum acceptable specification standards that meet the requirements in Part L of the Building Regulations in force when the building was constructed NB The domestic type activities available under the building type Residential spaces in ISBEM are to allow the energy calculations for the generation of one EPC for a building which contains residential accommodation above a non
100. oject P HVAC System Defaults Project building services Aw Conditioning Inspection Ei TE kw IY Tick this box if the actual output ig unknown Wiha i the estimated total effective rated output of the air conditioning system a Greater than 250kW Haz an air conditioning inspection been commissioned for compliance with Energy Performance of Buildings regulations D ont kno hi for cooling Figure 14 Air Conditioning Inspection sub tab of the Global and Defaults tab in the Building Services form 3 5 2 Defining HVAC Systems HVAC Systems tab Guidance on input parameters in this tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK The building s HVAC system s is defined within the first seven sub tabs of theHVAC systems tab e General sub tab e Heating sub tab e Cooling sub tab e Systems Adjustments sub iab e Metering Provision sub tab e System Controls sub tab This is where heating system controls for each HVAC system can be defined e Bi valent Systems sub tab e Zone Summary sub tab lf no HVAC system serves the space i e an unconditioned zone you should select the option Zones without HVAC system as the HVAC system for that zone in theGeometry form gt Zones tab gt General sub tab or the Building Services form gt Zones tab gt HVAC amp HW System sub tab spaces which have no heating or cooling e
101. on for doors Sub tab General U value W m k Km kJ m K Has the U value been corrected to account for heat loss through floors in contactwith the ground e Name of construction e Definition of construction of doors using one of the following 3 options 1 Library O O or Category Library 2 Inference procedures O O O Or Building sector Building Regulations compliance General description 3 Enter parameters manually O O Tab Glazing Sub tab General U value W m k Km kJ m K e Name of construction e Definition of construction of glazing using one of the following 3 options 1 Library O O Or Category Library 2 Inference procedures O O O Or Building Regulations compliance Number of panes Coating Frame material 3 Enter parameters manually O O O Form Geometry Tab Project U value for glazing in vertical inclination W mK T solar for normal incidence L solar for normal incidence Sub tab General amp Geometry e Global air permeability at 50pa m h m e Building clockwise rotation degrees e Global zone floor to floor height m iSBEM version 5 2 d EPC Generation UK 76 31Jul14 e Maximum number of storeys e Building area m Sub tab Thermal Bridges e Global Psi value W mK for junctions involving metal cladding for each of Roof Wall Wall Ground floor Wall Wall corner Wall Floor not ground floor Lintel above
102. ons sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK System Configuration sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK System Configuration cont sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK 12 iSBEM version 5 2 d EPC Generation UK 31Jul14 Local Area Network LAN Settings sub tab In this sub tab the following information can be entered Figure 1 Proxy Server 1 Tick box to indicate whether a proxy server is used by a Local Area Network for connecting your computer to the Internet If the box is ticked i e a proxy server is used then the following fields become active a Address the URL address of the proxy server used b Port the port of the proxy server used c Tick box to indicate whether the proxy server requires a password If the box is ticked then the following field becomes active i User name the user name for the proxy server li Password the password for the proxy server NB All information on the proxy server if one is used should be available from your IT Department NB Please note that in order to generate the XML message for official lodgement in England Wales and Northern Ir
103. or EPC Scotland NB SBEM now automatically calculates the comparative England asset rating and reports it on the XML file for Scotland EPC 3 Tick box to indicate whether you wish to produce the EPC in Welsh as well as in English This parameter is active only if the Purpose of Analysis parameter is set to EPC Wales Tick box to indicate whether in addition to producing an EPC you wish to check compliance with Building Regulations and produce a compliance document Stage of analysis Only the option as built is available when the purpose of analysis is generating an EPC Project complexity complexity of the building for the purposes of energy assessments for EPCs The options available are e Level 3 simple existing buildings that can be modelled using SBEM e g small buildings such as converted houses or doctors surgeries e Level 4 new and existing buildings that can be modelled using SBEM e g small purpose built office buildings e Level 5 new and existing complex buildings that need to be modelled using Dynamic Simulation Models DSMs e g large office buildings or factories The decision of which level of assessor should be assigned to a particular building should follow the agreed convention flow chart in APPENDIX D NB If in doubt about whether iSBEM would be appropriate for modelling your building please contact your Accreditation Scheme Provider
104. ormation contains the energy assessor s details Property Reference Number assessment software the certificate s validity dates and the Recommendations Report Reference Number the second output file from EPCgen see APPENDIX A A 1 for a sample Energy Performance Certificate for the Example building NB You must close all output files before re running the calculation so the software can over write them Otherwise an error message will be produced 4 2 7 Recommendations Report This report can be accessed from the Ratings form gt Asset Rating tab gt Building Rating sub tab by clicking on the EPC Recommendation Report button and is stored in the same location as the project files as described in Section 4 2 10 Accessing the reports from the project folder The file is in pdf format 55 iSBEM version 5 2 d EPC Generation UK 31Jul14 This report contains some administrative information about the building and the energy assessor and a list of recommendations generated by the calculation and input by the energy assessor for energy efficiency improvements in the building It contains the following sections e Administrative Information contains information on the Property Reference Number the software used to produce the report and the validity dates of the report e Energy Assessors Details contains details about the energy assessor e Background contains information on the legislation and the servicin
105. ower for photoelectric control and or constant illuminance control o Do you want SBEM to perform automatic daylight zoning for lighting controls B Percentage area of zone where lighting is controlled by daylight e Type of occupancy sensing in the zone o Parasitic power for occupancy sensing Sub tab Display Lighting e Does display lighting use efficient lamps field enabled for activities with display lighting o Lumens per circuit wattage for display lighting e ls there time switching for display lighting field enabled for activities with display lighting Sub tab SC e Name of SC system providing pre heated air to this zone e Percentage of the total air pre heated by the SC system that is provided to this zone 83 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX C Connection to the National Register If the XML file is not generated you should check the following Ensure that your computer is connected to the internet while running the EPC calculation If applicable ensure that you have entered the proxy server details correctly into ISBEM Contact your IT department for assistance on your correct proxy server settings If applicable ensure that the firewall settings on your computer system allow access to the online systems which is needed for generating the XML file Contact your IT department for assistance on your firewall settings The websites and IP addresses that your firewall will need to allow access to
106. plied electricity If you Know the fuel type used by the heating system you can define it in the Building Services form gt Global and Defaults tab gt HVAC System Defaults sub tab See Section 3 5 1 Global and Defaults tab NB The default HVAC systems in iSBEM are representative of existing rather than new buildings and should only be used if you are running an EPC calculation for an existing building not a new building and do not know the type of the HVAC system in your building or its detailed parameters as the default efficiencies assumed by iSBEM for them are quite pessimistic and cannot be edited by the user 38 iSBEM version 5 2 d EPC Generation UK 31Jul14 Figure 18 shows a zone s HVAC HWS and lighting characteristics being defined General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Global and Defaults HVAC systems Hws IEZ Ps Wind generators Solar collectors Zones Record selector z0 0l east A P HVAC amp HW systems Ventilation Ventilation cont Exhaust Lighting Lighting Contos Display Lighting Solar Collector H AC system parameters System selection HVAC for the example building Lighting contigured at zone level Are there Destratification fans in the zone Hot Water System HVS selection Hw for the example building m Deadleg length in this zone 2 m Record H 1 of 19 Po HO OR i o Fil
107. port the previously input details into the version of ISBEM you are working with If you are importing details from a version of iSBEM specifically for MS Office 2003 use the Import details from mdb button to import your details from an mdb file If you are importing details from a version of iSBEM specifically for MS Office 2007 use the Import details from accdb button to import your details from an accdb file NB If you are running the Office 2007 version of iSBEM you can import assessor details from an Office 2003 or an Office 2007 version of iSBEM i e 2 buttons will be visible in the interface for mdb and accdb files respectively On the other hand if you are running the Office 2003 version of iSBEM you can import details from a previous Office 2003 version of iSBEM only i e only 1 button for mdb files will be visible in the interface Clear all All the information in the Energy Assessor Details Qualified Accredited Person Details sub tab will remain visible in any new project created but can be cleared by pressing the Clear all button 19 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM File Options General Information Lee Basic information about Project Owner and Energy Assessor iF Project details Special considerations EFED Recast
108. ppear in the XML file and lodged EPC Post Code of the energy assessor or qualified accredited person NB The input should be as you want it to appear in the XML file and lodged EPC Telephone number of the energy assessor or qualified accredited person Email address of the energy assessor or qualified accredited person Accreditation Scheme the name of the Accreditation Scheme to which the energy assessor belongs For energy assessors accredited with more than one scheme the scheme name you input here should correspond to the Assessor Number you input below Assessor number the registration number of the energy assessor within his Accreditation Scheme This parameter must consist of 4 letters followed by 6 digits and it should not be left blank For energy assessors accredited with more than one scheme the assessor number you input here should correspond to the name of the Accreditation Scheme you input above NB The input should be exactly as on the National Register of non domestic Energy Assessors www ndepcregister com for England amp Wales and www epbniregisternd com for Northern Ireland If in doubt please contact your Accreditation Scheme Provider 18 iSBEM version 5 2 d EPC Generation UK 31Jul14 9 Qualifications the qualifications of the energy assessor as they will need to be qualified for the type of building being assessed check with your Accreditation Scheme Provider This parameter is ac
109. produced on your computer will always contain the watermark However this does not apply if EPC Scotland has been selected as the Purpose of Analysis when the XML Is always generated if the calculation runs successfully and the EPC documents generated on your computer are not watermarked IMPORTANT Energy Assessors should now input their full details name address qualifications name of Accreditation Scheme Provider trading name etc in the interface exactly as they want them to appear in the XML file and on the lodged EPC as well as their assessor number This is because the new verification system willnot overwrite these details with information from the National Register 12 Membership Number the membership number of the qualified accredited person This parameter is active only if the Purpose of Analysis parameter is set to EPC Scotland 13 Protocol Organisation the accreditation scheme of the qualified accredited person This parameter is active only if the Purpose of Analysis parameter is set to EPC Scotland Import Details clicking on either of the two buttons available will enable you to import the assessor details which you might have entered in a previous version of iSBEM instead of re typing them After you click on the button you will have the option to browse the folders on your computer and select a previous version of iSBEM for e g ISBEM_v4 1 e mdb from which to im
110. r a definitive interpretation of the law The guidance provided in this document is limited to the technical operation of the software tool It is offered in good faith but is not binding on any person s or organization The same applies to the default values in the interface which should be viewed as conservative suggestions intended to be replaced by actual values iSBEM version 5 2 d EPC Generation UK 31Jul14 Table of Contents VCE SIOIU ING Os ii Ake take a Gira aaah ae ees ae a nee ne a aeita 2 ie WHATISIN THIS GUIDE isisi aaa 8 dele 2SCODE Of TC guide seraa n en eE ES EEE TA 8 2 CGALCUCATION BASIC S isiesseientenestianuntinncevvniencvvoncveresvsnrsvsesseseviintucstetertnecteitat 9 2 1 UK Energy Performance Certificate purposes cccecececeeeeeeeeeeeeeeeeaeeeees 9 3 ENTERING A BUILDING INTO ISBEM 0 ccccccceeeeeeseeeseeeeseneeceneenenees 12 3 1 Important note on the default values in ISBEM cccccccceeeeeeeeeeeeeeeees 12 32 General TOV eers nl aaudeewed sail angle ass Me via MI sates Sis aeayeooe aunts 12 3 2 1 File Options taD cccccccccccsccsseesecesceneees ces ii onnaa O socsceeceasssecesseceaenses 12 3 2 2 General Information tab 1 00ccccccs 01 QM oes n cect eee OO oaa 14 3 2 3 Obtaining Potential Asset Rating for EPC Scotland ccccccccneeeeetecenseessessensaeneees 20 3 3 Project Database form N a a an 23 3 4 Geometry form
111. r is set to EPC England EPC Wales or EPC Northern Ireland NB A valid option for this parameter must be selected for the EPC calculation to run successfully 2 Transaction type the transaction type which has prompted the generation of the EPC A valid option for this parameter must be selected from the drop down menu for the EPC calculation to run successfully 16 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM File Options General Information Basic information about Project Owner and Agent Q Project details Special considerations EPBD Recast Building details Qualified Accredited Person details Owner details Building details Building type Offices and Workshop businesses 89 Name of the project Example building O00 UPRN oo00000000 Access restriction Norestrictiof Building address CE SS City LONDON Postal Code sw23 1HA Location Description Inspection date 29 01 2008 Calendar F Figure 4 The Building Details sub tab of the General Information tab in the General form Building Details sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK In this sub tab Figure 4 the following information can b
112. ract W I s field enabled if there is mechanical ventilation at Zone level o Demana controlled ventilation B Flow regulation type e Does activity require high pressure drop air treatment Sub tab Ventilation cont e Heat recovery in the zone ventilation field enabled if there is mechanical ventilation at zone level o Heat recovery seasonal efficiency o Variable heat recovery efficiency e Specific fan power for system terminal units W I s Sub tab Exhaust e ls there mechanical exhaust in the zone o Flow rate of mechanical exhaust I s m o Specific fan power for exhaust W I s o Extract system serves single or multiple rooms Sub tab Lighting e Design illuminance lux e Provide information on lighting using one of the following 3 options 1 Full lighting design o Total wattage W or 2 Lighting chosen but calculation not carried out o Lumens per circuit wattage o Light output ratio or 3 Lighting parameters not available o Lamp type 82 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Does display lighting use efficient lamps field enabled for activities with display lighting o Lumens per circuit wattage for display lighting e Are air extracting luminaries fitted Sub tab Lighting Controls e Type of lighting controls in the zone o Local manual switching o Photoelectric B Dimming or switching B Type of sensors B Different sensor for back of zone o Constant illuminance control B Parasitic p
113. rface for SBEM LTHW Low Temperature Hot Water boiler LZC Low or Zero Carbon MTHW Medium Temperature Hot Water boiler NCM National Calculation Methodology PVS Photovoltaic System SBEM Simplified Building Energy Model SSEER Seasonal System Energy Efficiency Ratio SSEff seasonal System Efficiency SES Solar Energy System SFP Specific Fan Power TER Target Emission Rate VAV Variable Air Volume VRF Variable Refrigeration Flow 7 iSBEM version 5 2 d EPC Generation UK 31Jul14 1 WHAT IS IN THIS GUIDE 1 1 Scope of the guide The objective of this this document is to give step by step by step guidance on the use of iISBEM for the purpose of generating energy performance certificates for non domestic buildings in the UK This guide includes How to work through the steps of the input procedure that are specific to EPC calculations or different to those for compliance assessments which are described in the User Guide volume How to use iSBEM Compliance Assessment UK How to obtain the Energy Performance Certificate and Recommendations Report This guide does not include A detailed description of the structure of the NCM A full definition of the reference building which is used to produce the rating required by the Energy Performance of Buildings Directive EPBD or the notional and typical buildings The above can be found in England sNCM Modelling Guide which is available from the NCM website at www ncm bre
114. rmal bridge length m o Thermal bridge Psi W mK o Thermal bridge description Form Building Services Tab Global and Defaults 78 iSBEM version 5 2 d EPC Generation UK 31Jul14 Sub tab HVAC System Defaults e Fuel type for default Heating only Other systems e Fuel type for default Heating and mechanical cooling systems oub tab Project building services e Do the lighting systems have provision for metering field not enabled for EPC Scotland o Is there monitoring and testing with alarm for out of range values field enabled if lighting systems have provision for metering e Electric power factor e The CO emission factor for the district heating network field enabled only if the heat source and fuel type of any of the HVAC systems is set to be district heating e The primary energy factor for the district heating network field enabled only if the heat source and fuel type of any of the HVAC systems is set to be district heating Sub tab Air Conditioning Inspection sub tab not enabled for EPC Scotland e Does the building have an air conditioning system o Is the actual output unknown B Total effective rated output of the air conditioning system kW or B Estimated total effective rated output of the air conditioning system o Hasan air conditioning inspection been commissioned for compliance with Energy Performance of Buildings regulations Tab HVAC Systems Sub tab General e HVAC system name e HV
115. rmation tab The General Informationtab contains a few sub tabs as described below where you can enter as much or as little background information about the project However there are also essential parameters to be selected such as the weather location for the project and the purpose of the analysis These details can be entered and edited in their respective tabs seeFigure 2 Some of this information may have already been entered when the project was first created see the User Guide volume How to use iSBEM Basics UK The General Informationtab contains the following sub tabs General Project Database Geometry Building Services Project Details sub tab Additional Project Details sub tab Special Considerations sub tab EPBD Recast sub tab Building Details sub tab Certifier Details OR Energy Assessor Details OR Agent Details OR Qualified Accredited Person sub tab Owner Details sub tab Ratings Building Navigation About SBEM File Options General Information Basic information about Project Owner and Energy Assessor 7 Project details Additional project details Special considerations EPED Recast Building details Energy Assessor details Owner details Building Regulation Bye Lawe amp EPBD parameters Purpose of the analysis EPCEnglamd ge Tick to additionally check Building Regulations Weather location London Stage of analysis E Built m Proje
116. rs for the most up to date version The following procedure is to be applied to all buildings and or parts of buildings within a particular energy assessment exercise Are any of the following features present to any degree in the building a Night ventilation strategy b Ventilation with enhanced thermal coupling to structure YES c Demand controlled ventilation d Automatic blind control e Atria See decision flow chart accompanying notes Are any of the following HVAC supply distribution types present to any degree within the building A Level 4 assessment is YES therefore required a Medium temperature hot water MTHW b High temperature hot water HTHW c Steam distribution Are any of the following air conditioning system types present to any degree within the building a Variable air volume VAV single duct b VAV dual duct c VAV indoor packaged cabinet d Fan coil systems 2 3 or 4 pipe and changeover or non changeover e Induction systems YES f Constant volume systems CAV fixed or variable fresh air rate g Multizone hot deck cold deck systems h Constant volume systems terminal reheat i Constant volume systems dual duct j Chilled ceilings or passive chilled beams plus displacement ventilation k Active chilled beams D Water loop heat pump systems e g Versatemp A Level 4 assessment is therefore required Is there an air conditioni
117. rsion 5 2 d EPC Generation UK 31Jul14 files as described in Section 4 2 10 Accessing the reports from the project folder The file is in pdf format This report gives a Summary of building s energy and CQ emissions performance for the different end use categories and a full list of recommendations generated by the calculation and or input by the user for energy efficiency improvements in the building i e not just the recommendations that appear in the official Recommendations report described in section 4 2 7 Recommendations Report It provides e The name and type of the building e Akey to the colour codes used in displaying the recommendations e The current performance of the building for each of the following categories such as the attributed percentage of the total building s CQ emissions and overall energy performance e Heating e Cooling e Hot water e Lighting e Renewables e Overheating e Envelope e Fuel Switching e Auxiliary e Other e Recommendations related to each of the above categories and for each recommendation a set of information is displayed such as the potential impact of implementing the recommendation on the energy performance and CQ emissions of the building the potential saving in COs emissions per pound spent and any additional comments input by the energy assessor It also includes any comments added by the Energy Assessor to any of the NCM recommendations NB Any NCM recomm
118. s is lt 0 5 This impact will appear in the Recommendations report COs Saved per Spent You can select from the options available in the drop down menu GOOD FAIR POOR and UNKNOWN in order to specify the potential CQ emissions saved from the actual building per pound spent on implementing the recommendation in the actual building Payback drop down menu You can select from the options available in the drop down menu LONG MEDIUM and SHORT in order to specify the typical payback time for implementing the recommendation in the actual building LONG payback is gt 7 years MEDIUM payback is gt 3 years and lt 7 years SHORT payback is lt 3 years If you know the exact figure for payback time in years use the next parameter instead Payback number Here you can input in years the typical payback time for implementing the recommendation in the actual building If you do not know the exact figure for payback time in years use the previous parameter instead The following fields however remain greyed out or un editable as the user is not allowed to modify these parameters of NCM recommendations a d Category This describes the category under which the recommendation is classified such as heating cooling etc Code This describes a unique code for each NCM recommendation The code of any recommendation created by the energy assessor will be USER Recommendation This describes the text o
119. s use The Energy Assessor may have inserted additional measures in section 3d Other Recommendations He she may have removed some automatically generated recommendations or added additional recommendations These recommendations do not include matters relating to operation and maintenance which cannot be identified from the calculation procedure Page 5 of 7 66 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 c Legal disclaimer The advice provided in this Recommendation Report is intended to be for information only Recipients of this Recommendation F are advised to d Complaints Details of the assessor and the relevant a report and the energy performance c the accreditation scheme from our together with details of their proc certificate and for making a complaint A Page 6 of 7 67 iSBEM version 5 2 d EPC Generation UK 31Jul14 0000 2090 0040 1000 0803 5 Glossary a Payback The payback periods are based on data provided by Good Practice Guides and Carbon Trust energy survey reports and are average figures calculated using a simple payback method It is assumed that the source data is correct and accurate using up to date information The figures have been calculated as an average across a range of buildings and may differ from the actual payback period for the building being assessed Therefore it is recommended that each suggested measure be further investigated
120. s who have undergone Green Deal training To create a scenario of recommended improvements in iSBEM 1 Set the Type of EPC parameter to Potential in the General form gt General Information tab gt Project details sub tab see Figure 7 This action causes a new tab entitledPotential Measures to appear in the General form see Figure 8 From the Record selector drop down menu in the Potential Measures tab select the option Create new Scenario based on BASELINE This will create a copy of the baseline building model i e the building as is on which the assessor can make alterations to add improvement measures while leaving the original baseline model unaffected The Scenario copy is assigned the name New Scenario by default but the name can be changed by editing the text within the Name field see Figure 9 A short description may also be entered in the Description field explaining what changes will be introduced and assessed but this is not obligatory Notice that the name of the scenario the user is working on is shown at the top left hand side of the General form in green text for reference To create an improvement measure in the General form gt Potential Measures tab gt Improvements sub tab input a name for the improvement measure within the New Measure field and click on the Create button Notice that the name of the measure will appear at the top of the form in green text
121. sesecesssneesees 37 ch Defining the zone specific building services Zones tab cccccccsseseeeceessneeeeessnnaeseneees 37 3 6 Baling Navigation SBR cccccccecccseesseecceeeceeesceesceeecenesaeesceeeseeees 41 3 7 ADODMBBBEDM form SA c cccccceccscecescecesceeesoeeesccescenescenesceseeceaeeceess 41 4 CALCULATING AND VIEWING THE ENERGY PERFORMANCE OF THE BUILDING THE RATINGS FORM AND OUTPUT REPORTS ccccsseeeseeeeeeneeeeneeneees 42 Ai The Ratings Tormine a e E G 42 4 1 1 ASS RAUNG AD aiea na O etait Sma deannale 42 A2 SBEM OUMDUT FEDOMS issue a actontebe hs eoasteuact acess 53 4 2 1 SBEMVEMAIN OULDUL DOCUMEN asss T E AS 54 4 2 2 Data Reflection Report Actual Building 1 ccccccccsneeeeeeccnneseeeessaaneeeessesansseeseseas 54 4 2 3 Data Reflection Report Notional BUIInd 1 ccccccccesseeeeceeeenseseeeeeseaneeesessenaaeneess 54 4 2 4 Technical Output Report Actual Building ccccscecccceecseeeseececssseseeessssseeesecesaneeneees 54 4 2 5 Technical Output Report Notional Building cccccssseccecceeesneeeecseeueesescesssaeeseessssanes 54 4 2 6 Energy Performance Certificate csscccccccccccscccnncssssssecceccssanaaceesseeeesesssssaaansnanensess 54 4 2 7 Recommendations FRODOSK ccssecccccseseecccuusecccsuuseecsauseeeesasesessuuseeesanseesessnsesessansseess 55 4 2 8 Technical Output Report Reference Building c cccccceeeeccccccee
122. sion 5 2 d EPC Generation UK 31Jul14 3 ENTERING A BUILDING INTO ISBEM This chapter takes you through each of the iSBEM data entry forms consecutively theGeneral Project Database Geometry and Building Services forms giving guidance on what information is required at each stage wherever it is different to or in addition to that required for compliance assessments as described in the in the User Guide volume How to use iSBEM Compliance Assessment UK 3 1 Important note on the default values in iSBEM In iSBEM there are default values included for various parameters For example there are default seasonal efficiencies for HVAC systems and default constructions for envelope elements so that you can select them when defining the envelopes of a zone when learning how to use the tool These default values are not generous i e usually pessimistic should be checked by the user and if appropriate changed or added to NB If none of the default values in iSBEM are changed when modelling a new building it is likely that the building will achieve a poor asset rating 3 2 General form The General form contains two tabs e File Options tab e General Information tab 3 2 1 File Options tab The File Options tab has five sub tabs e File Operations sub tab e System Configuration sub tab e System Configuration cont sub tab e Local Area Network LAN Settings sub tab e Helpline Diagnosis sub tab File Operati
123. sub tab by clicking on the Energy Performance Certificate button and is stored in the same location as 54 iSBEM version 5 2 d EPC Generation UK 31Jul14 the project files as described in Section 4 2 10 Accessing the reports from the project folder The file is in pdf format This report gives a Summary of the energy performance of the building and its Asset Rating It contains the following sections e Energy Performance Certificate contains the title of the certificate address of the building and the Certificate Reference Number e Energy Performance Asset Rating contains information about the building s calculated Asset Rating based on its predicted CO emission rate BER It also shows where the building s Asset Rating fits on a scale of the building energy efficiency bands e Benchmarks contains information about the Asset Ratings corresponding to the target COs emission rate Part L TER and the typical stock average CQ emission rate e Technical Information contains information on the servicing strategy of the building i e building environment the service strategy that delivers the greatest total CQ emissions the main heating fuel the fuel which delivers the greatest total thermal output for space or water heating and the complexity of the building NB If none of the zones in the building have been defined as conditioned the building environment will be set by the calculation to be U
124. t for the notional building I Example building Complete_epc inp 24 06 2014 MOSIE E EKE 3 Example building Complete inp 24 06 2014 16 csv Data Reflection report for the actual building _ Example building Complete_sim hws 24 06 2014 16 24 HWS File 2 KB Example building Complete_not_dr htm 24 06 2014 16 24 HTML Document 2 945 KB Example building Complete_dr htm 24 06 2014 16 24 html Data Reflection report for the notional building A Example building Complete_ref err 24 4 16 2 A Example building Complete_not err 24706201410 html Data Reflection report for the actual building A Example building Complete_epc err 240673814 16 25 Error log 1 KB A Example building Complete err 24106 20S A i aji WRA 4 Error files reporting error messages and warnings _ Example building Complete_ref bdl 24 06 2014 16 24 _ Example building Complete_not bdl 24 06 2014 16 24 BDL File 121 KB __ Example building Complete_epc bdl 06 2014 16 2 __ Example building Complete_brukl bdl _ Example building Complete bdl 5 20 lt SBEM Secondary Recommendations Report T Example building Complete_sbem pdf 24 0677 BEE a T Example building Complete_epc srec pdf 24 06 2014 lt 6 EPC Recommendations Report 24 0 nergy Performance Certificate ps Example building Complete_epc epc pdf o TH Example building Complete_dr pdf 23 08 2014 18 24 pdf Data Reflection report for the actual building Figure 28 Conten
125. te Search Figure 18 Selecting a zone s HVAC HWS and lighting systems Ventilation sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK This sub tab is used to specify the type of ventilation system specific for each zone The following information is required Zonal Ventilation Type 1 Zonal ventilation type A mechanical ventilation system separate from the heating or cooling system i e zonal ventilation can be added here If the selected HVAC system does not already include ventilation the zonal ventilation radio buttons become active This would be possible for example with radiators or under floor heating You need to select either Natural or Mechanical supply amp extract according to whether there is a mechanical ventilation system present in the zone to provide fresh air Convention For EPCs Passive stack ventilation The convention is that passive stack should be treated as natural ventilation Figure 19 shows a zone s ventilation characteristics being defined 39 iSBEM version 5 2 d EPC Generation UK 31Jul14 General Project Database Geometry Building Services Ratings Building Navigation About iSBEM Global and Defaults HVAC systems Hws SES Pvs Wind generators Solar collectors Zones Record selector 20
126. that 6 The default heat generator efficiency is chosen It is the chiller system be investigated to gain an understanding of its recommended that the heat generator system be investigated to efficiency and possible improvements gain an understanding of its efficiency and possible improvements Address Any Road Any Town EE00 E00 Conditioned area m 2900 Name of protocol organisation Sterling Accreditation Ltd ABDG123456 Date of issue of certificate 06 Jan 2014 Valid for a period not exceeding 10 years This certificate is a requirement of EU Directive 2002 91 EC on the energy performance of buildings NB THIS CERTIFICATE MUST BE AFFIXED TO THE BUILDING AND NOT REMOVED UNLESS REPLACED WITH AN UPDATED VERSION AND FOR PUBLIC BUILDINGS DISPLAYED IN A PROMINENT PLACE 13 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX B List of parameters required by iSBEM for EPC calculations Form General Tab General Information Sub tab Project details Purpose of analysis Type of EPC field enabled only for EPC Scotland EPC in Welsh field enabled only for EPC Wales Additionally check Building regulations Weather location Stage of analysis Project complexity field enabled only for England Wales and Northern lreland EPCs S6 type of Building field enabled only for Scotland EPC Is the building fully naturally ventilated and calculations confirm it temperature during occupancy periods are always below
127. tive only if the Purpose of Analysis parameter is set to EPC England EPC Wales or EPC Northern Ireland See the Project complexity parameter in the General Information tab 10 Emp Trading Name the employer or the trading name of the energy assessor This parameter is active only if the Purpose of Analysis parameter is set to EPC England EPC Wales or EPC Northern Ireland NB The input should be exactly as you want it to appear in the XML file and lodged EPC 11 Emp Trading Address the employer or the trading address of the energy assessor This parameter is active only if the Purpose of Analysis parameter is set to EPC England EPC Wales or EPC Northern Ireland NB The input should be exactly as you want it to appear in the XML file and lodged EPC NB See APPENDIX C Connection to the National Register for more guidance and trouble shooting steps NB Please note that in order to generate the XML message for official lodgement in England Wales and Northern Ireland your computermust be connected to the internet and you should enter your assessor number into the General form gt General Informationtab gt Energy Assessor Details sub tab gt Energy Assessor Details sub form see Section 3 2 2 General Information tab If there is no internet connection then the XML message will not be generated Please note that the EPC and Recommendations Report
128. ts of the Projects folder showing the SBEM output reports when running SBEM for Energy Performance Certificates T Example building Complete_epc rec pdf 59 iSBEM version 5 2 d EPC Generation UK 31Jul14 APPENDIX A Sample Output Reports A 1 Sample Energy Performance Certificate Energy Performance Certificate 9 HM Government Non Domestic Building 56 London Road Certificate Reference Number LONDON 0100 0038 0000 0029 0002 SW23 1HA This certificate shows the energy rating of this building It indicates the energy efficiency of the building fabric and the heating ventilation cooling and lighting systems The rating is compared to two benchmarks for this type of building one appropriate for new buildings and one appropriate for existing buildings There is more advice on how to interpret this information on the Government s website www communities gov uk epbd Energy Performance Asset Rating More energy efficient SSCHSHSSSSSSSSSSSSSSHSSSSESSSSSSOSESSSSSOCSCTSSESSOTESSESS CSCS ESESSS Net zero CO emissions A 0 25 This is how energy efficient the building is 1 161125 F 126 150 G Over 150 Less energy efficient Technical information Main heating fuel Natural Gas Buildings similar to this one could have ratings as follows Building environment Air Conditioning di Total useful floor area m 2900 If newly built Building complexity NOS level 3 If typical of the Bui
129. window or door Sill below window o Jamb at window or door e Global Psi value W mK for junctions not involving metal cladding for O O O OOO each of o Roof Wall o Wall Ground floor o Wall Wall corner o Wall Floor not ground floor o Lintel above window or door o Sill below window o Jamb at window or door Tab Zones Sub tab General Zone name HVAC system which serves the zone Building type Activity type in the zone Zone area mf Zone floor to floor height m or select global value Air permeability at 50pa m h m in the zone or select global value Is this a fit out area in a shell and core building Zone multiplier Description of zone Define the following Psi values for thermal bridges in the zone or use global values o Zone Psi value W mK for junctions involving metal cladding for each of Roof Wall Wall Ground floor Wall Wall corner Wall Floor not ground floor Lintel above window or door Sill below window Jamb at window or door o Zone Psi value W mK for junctions not involving metal cladding for each of Rooft Wall Wall Ground floor Wall Wall corner Wall Floor not ground floor Lintel above window or door Sill below window Jamb at window or door DNDDNDDWDDND WW DDDWDNWDDNAD W Tab Envelopes Sub tab General e Envelope name e Zone which envelope belongs to T1 iSBEM version 5 2 d EPC Generation UK 31Jul14 e Type of envelope o Pitch angle degrees field enabl
130. y If you know the fuel type used by the heating system you can define it in this sub tab Figure 13 NB The default HVAC systems in iSBEM are representative of existing rather than new buildings and should only be used if you are running an EPC calculation for an existing building not a new building and do not know the type of the HVAC system in your building or its detailed parameters as the default efficiencies assumed by iSBEM for them are quite pessimistic and cannot be edited by the user General sub tab Guidance on input in this sub tab is the same as that provided in the User Guide volume How to use ISBEM Compliance Assessment UK Heating sub tab Guidance on input parameters in this sub tab not described below is the same as that provided in the User Guide volume How to use iSBEM Compliance Assessment UK 1 Effective heat generating seasonal efficiency If you know the effective heat generating seasonal efficiency for the heat generator it can be introduced manually into the interface Otherwise a conservative default value will be used by SBEM The default seasonal efficiency value if no efficiency is input by the user is based on whether the generator is on the Energy Technology List ETL of the Enhanced Capital Allowance ECA scheme If not you then need to select whether the generator was installed in or after 1998 NB For boiler systems installed from 1998 onwards a default seasonal eff

A User Guide to iSBEM: (3) EPC Generation - UK

Contents

Download Pdf Manuals

Related Search

Related Contents