Building Regulations Part L2 (2006) & Part F VE
Contents
1. a 23 3 3 EDD 23 4 L2 2006 Building amp System data ceres 23 4 1 Er 23 4 2 Building Details mx 23 4 3 The nina Bodge assan E E a a 24 4 4 EPC EPC Recommendations tene tirer Dee eran tat rt eee naaa aE aaa Fee od 24 5 Room Data actual Duildlint scene rix us uEr SEEK ERE uEEu rn KR EE M xE RE UR CERE nC MEER EE 25 5 1 Room Data in the context of Part L2 2006 ssssssssessseeenene eene nennen 25 5 2 Room Data General tab actual building sse 26 5 3 Room Data Building Regs tab actual building 26 5 4 SBEM specific ice 28 5 5 Room Data Room Condition tab actual building 29 5 6 Room Data System tab actual building sese 30 6 Building Regulations Construction Data cessere 30 6 1 GLAZINGS mE 30 6 2 Bia ei aa 31 6 3 ereiaro TOOLS C 31 6 4 All construction categories eeeessssseeseseseeeeeseeenee ee eaaeeeeeeaaeaeseeaaeaeseaaeeeseeaaeeeseeeeeaeseeneneeees 31 7 Part L2 2006 VE SBEM Results cicsicsnissnsinsesivnsssnsisnshnnuinennesnniensasinhenn2. System adjustment and Control corrections options in the wizard produce worthwhile improvements in performance DHW systems should be examined for efficiency opportunities Page 20 of 35 Virtual Environment design simul fies Integrated Environmental Solutions Limited Lighting Efficient lighting and lighting controls offer substantial potential for bringing down emission rates and moderating summer temperatures Any saving in lighting consumption has a double benefit directly reducing electrical load and by reducing room gains having a favourable effect on summertime cooling loads and temperatures Glazing Reducing glazing area introducing shading and optimising glazing type may all improve the building s performance The implications for natural lighting should however be borne in mind Ventilation Since infiltration is reduced to low levels by Criterion 2 and minimum ventilation levels are laid down by the room activities the main opportunity for using ventilation control to reduce carbon emissions and summer temperatures is free cooling DHW demand changing areas The NCM templates for DHW usage have been found to be high for some activities particularly changing areas in sports centres and schools The DHW usage can be changed by altering the designation of activity areas but this would need to be agreed in advance with Building Control Adjustments for management features The settings e
3. design simulat fies Integrated Environmental Solutions Limited Target Emissions Rate TER The target building emissions rate derived from the Notional Building Emissions Rate Cnotional by applying the Improvement Factor and LZC Factor using the formula TER Crotional x 1 improvement factor x 1 LZC Improvement Factor A preset factor determining the degree to which the TER must improve on the Notional Building Emissions Rate Cnotionai LZC Factor The Low and Zero Carbon benchmark which together with the Improvement Factor determines the degree to which the TER must improve on the Notional Building Emissions Rate Cnotional Did the analysis pass the CO2 emissions rating The pass fail result for Criterion 1 YES if BER lt TER NO otherwise View Compliance Doc Click on this button to view the Compliance Document generated by BRUKL using inputs from the SBEM calculations together with the data entered in Building amp System Data and the results of the Criterion 2 and Criterion 3 checks Calculation details Click on this button to view the calculation data using inputs from the SBEM calculations together with the data entered in Building amp System Data and the results of the Criterion 2 U value checks Extra output files Two further output files are copied to the project s Regs SBEM BRUKL folder and may be of interest Both are in comma separated format buildingname not sim
4. Define in any case Compact fluorescent Y Does display lighting use efficient lamps 0 00 Lumens per circuit Watt Are air extracting luminaires fitted Controls Local manual switching I Photoelectric options r Sensor type j Switching Standalone C Di Parasitic power 0 30 Wm Default Occupancy sensing MAN ON OFF4EXT Time switching for display lighting Type swr CHING Hours off o Fraction off o Automatic daylight zoning for light controls r Different sensor to control Addressable back half of zone Yes SBEM to subdivide zone if needed No percentage area controlledis 100 5 5 Room Data Room Condition tab actual building All the data on this tab is taken from the NCM template and cannot be edited This data specifies the set points and profiles for heating and cooling and the hot water consumption rate Page 29 of 35 fies Integrated Environmental Solutions Limited 5 6 Room Data System tab actual building All the data on this tab is under your control It is shared with other lt VE gt views such as Apache View and other Regulatory Frameworks within lt VE gt Compliance In particular the room should be assigned an Apache System with properties accurately describing the system proposed for the actual building The following System tab attributes that would normally
5. design simulat fies Integrated Environmental Solutions Limited 2 3 Real actual and notional buildings The definition creation and purpose of these three buildings can be summarized as follows The real building is the building that you see in Apache View It is the building as designed and with the occupancy and plant operation conditions expected to apply in reality rather than the standard conditions stipulated for Part L2 compliance In Apache View it forms the basis for the analysis of heating and cooling loads and simulations The actual building is the building as designed but subject to standard patterns of occupancy and plant operation for Part L2 2006 as defined in NCM The actual building is the building displayed by default in lt VE gt Compliance It is identical to the real building in all respects except occupancy including associated internal gains and minimum ventilation rates and plant operation conditions which are given standard settings in VE Compliance as a function of the attributes building type and room activity Aspects of the actual building that are shared with the real building may be edited either Apache View or VE Compliance The notional building is a version of the actual building that is modified to conform to a clearly defined set of standards relating to glazing area constructions and system characteristics Its purpose is to provide a benchmark or target against whic
6. 0 15 fully naturally ventilated 0 2 fully air conditioned LZC Factor 0 1 Page 35 of 35 Virtual Environment design simulate innovate
7. System tab is drawn entirely from the room template The system parameters are under your control and may be adjusted as part of the process for achieving compliance By applying these rules lt VE gt Compliance automatically sets the attributes that are laid down by the room s NCM Activity while giving you control over those aspects where good design can produce energy and carbon savings namely system performance infiltration air tightness and ventilation strategies involving the use of outside air for cooling To this list can be added improvements to the building fabric and to system characteristics which of course do not feature in the room template data It should be added that wherever the room template is mentioned above there is as usual the option to override the template settings manually in individual rooms or groups of rooms However NCM template settings cannot be overridden in this way except in the special case of lighting gains System characteristics for the actual building which it shares with the real building are set by means of Apache Systems A suitable set of systems should be created and assigned to groups of rooms The UK NCM system data wizard facilitates this process and allows the system characteristics to be specified using an iSBEM like interface 2 4 Steps in performing a VE Compliance analysis The following workflow is recommended for preparing and performing a VE Compliance
8. analysis for Part L2 2006 The plan need not be followed slavishly Variations can be made in the ordering of the tasks and experienced users may wish to take alternative approaches to some of the stages The purpose of the plan is to guide you through the basic process Extra data required by the SBEM EPC method is not described in this section Step 1 Create geometry The process usually begins with the entry of building geometry in ModellT Step 2 Set location and weather data The building location is specified in the SBEMlocate utility The L2 regulations currently specify 11 locations in England and Wales but the use of any of Edinburgh Glasgow or Belfast is also permitted if local circumstances make this appropriate On the other hand Part F requires the weather location to be Belfast Unlike the ApacheSim route it is not necessary for a VE SBEM user to purchase the TRY and DSY weather files from CIBSE as SBEM holds this data internally Page 13 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited Step 3 Create and assign constructions Constructions for building elements such as walls roofs and glazing are created in the Constructions Database CDB utility accessible via Apache View or lt VE gt Compliance They should satisfy the U value requirements of Criterion 2 The construction definition should include allowance for non repeating thermal bridging using an are
9. appear in the System outside air supply frame are however hidden from view in Part L2 2006 Flow rate Variation profile The reason is that a specification of scheduled minimum ventilation forms part of the standard room conditions associated with the NCM activity which is handled via data on the Air Exchange tab To avoid a double specification of minimum ventilation the System tab ventilation parameters are disabled in Part L2 2006 6 Building Regulations Construction Data Part L 2006 requires certain attributes to be entered for constructions in addition to the data required for other thermal calculations This data is entered in the constructions database program APcdb The additional attributes broken down by construction category are 6 1 Glazing Display window Tick this box if the window is a display window Such windows are exempt from certain L2 2006 requirements Transmittances VE SBEM requires only the g value BS EN 410 and the Visible light normal transmittance bottom right Local shading This is ignored by VE SBEM External shading For VE SBEM only the Sky diffuse transmission factor is required Internal shading For VE SBEM only the Shading coefficient is required Page 30 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited 6 2 Doors Door type Select from the following types a personnel door b vehicle access or similar
10. csv The calculation details for the Notional building lt buildingname gt _dr csv The data reflection report for the Actual building Page 32 of 35 lt Virtual Environment gt design simulate fies Integrated Environmental Solutions Limited 7 2 SBEM EPC method Part L2 2006 England Wales Analysis Results Part L TER Typical Standard Actual BER View EPC kg CO2 m2 101 9 181 5 130 5 78 4 AssetRating Mew Recomimerc bilan Band C 30 ELE NUN ELE NEN BOEF eae ee Part L TER The target building emissions rate derived from the Notional Building Emissions Rate Crotional by applying the Improvement Factor and LZC Factor using the formula TER Cnotional x 1 improvement factor x 1 LZC Typical The Building Emissions Rate kgCO m2 calculated for the typical building Standard The Building Emissions Rate kgCO m2 calculated for the reference building adjusted by a fixed improvement factor of 0 235 as follows Cstandard Creference X 1 0 235 Actual BER The Building Emissions Rate kgCO m2 calculated for the actual building Asset Rating Band The ratio of the Actual emission to the Standard emission where 50 corresponds to a 1 1 ratio EPC Rating Cactual Cstandara x 50 The band letter and colour corresponding to this as also shown on the EPC is shown under the Actual emission figure The Part L and Typical bands are also shown based on similar formulae the numerical ra
11. in the lt VE gt Compliance User Guide Include room in Building Regs analysis Tick this box to include the room in the building regulations analysis By switching off rooms using this box you can perform separate analyses on different parts of the model Calculations in lt VE gt Compliance will include only the rooms that have this box ticked If an included room is adjacent to an excluded room or a room in an inactive layer the adjacency is treated as a reflexive boundary condition which means that conditions in the adjacent non included room will be assumed to be the same as in the included room Type of room This setting determines how the room will be treated for Part L2 2006 The options are as follows Heated space the usual designation applying to all occupied spaces within the insulated building envelope whether they are directly served by heating plant or not Spaces of this type must be assigned an NCM activity and will be treated as heated for the purpose of the Part L analysis Page 26 of 35 lt Virtual Environment gt fies Integrated Environmental Solutions Limited Unheated roof assign this type to a cold roof space that has insulation at its base ie at ceiling level Rooms assigned this type will not be explicitly modelled in the notional building but incorporated in the elements linking the unheated space with adjacent conditioned spaces Glazing cavity windows roofligh
12. in the Room Template rooms assigned the template will automatically have the NCM Activity and all the Room Data associated with it set in lt VE gt Compliance If you adopt a policy of including NCM Activity settings in your Room Templates you will save a lot of time and effort assigning NCM Activities to individual rooms and groups of rooms in lt VE gt Compliance The next section provides guidance on the Room Template settings Step 6 Room Template and Room Data settings for L2 2006 assessments When creating Room Templates it is important to understand which Room Template settings will be used in lt VE gt Compliance and which are overridden by standard activity based settings Building Regulations taken from Room Template or specified room by room This tab contains data used exclusively by lt VE gt Compliance Some of the fields can be set in the Room Template Others appear only in the lt VE gt Compliance Room Data and must be set on a room by room basis The check box Include room in Building Regs analysis allows you to restrict the Part L analysis to part of the building only The Type of room attribute is normally set to Heated room but the following alternative settings are provided to cover various types of unheated space Unheated roof use this type for an unheated roof space lying outside the insulated building envelope ie where the insulation is at ceiling level Glazing cavity require
13. is generated internally by the BRE SBEM tool and is only visible to the user in the form of output files In most respects the actual building is the same as the real building used in other lt VE gt views and Regulatory Frameworks However there are differences in the Room Data where for L2 2006 certain attributes assigned to the real building are overridden by attributes representing the standard internal conditions stipulated for L2 2006 in the NCM methodology The notional building differs from the actual building in the following respects in accordance with the rules set out in the NCM document Glazing and in some cases door areas are adjusted Standard constructions are applied Where there are unheated buffer spaces including unheated roofs in the actual building the notional building treats these as heat loss paths for adjacent heated rooms following the principles laid down in BS EN ISO 13789 1999 For these adjacencies standard constructions are applied replacing the heat loss paths including the unheated spaces in the actual building Standard Apache Systems are assigned to rooms depending on the type of conditioning assigned to the rooms in the actual building The notional building is created automatically from the actual building in the BRE SBEM tool and cannot be modified Building regulations room data Data relating to individual rooms is entered via the Room Data tabs General Building R
14. option c is that in the notional building air exchange between the levels will not be modelled so there will be unrealistic thermal barriers between them Options a and b are therefore preferred External ventilation rate air changes per hour This parameter applies only to rooms of type unheated roof space unheated buffer space and glazing cavity It is used for the calculation of effective U values through the space from adjacent heated spaces using BS EN ISO 13789 1999 These U values are used in the Part L2 Criterion 2 checks Template NCM building type An efficient way to set NCM activities for rooms is to set the activity in the Room Template The activity will then be automatically set along with other Room Template attributes for all rooms to which the template is assigned If the selected room has an NOM activity set in its Room Template the building type associated with that activity is displayed here provided that it matches the building type set for the model in Building Settings In other instances the Template NCM building type box displays the text Unset or incompatible Page 27 of 35 Virtual Environment design simul fies Integrated Environmental Solutions Limited For unheated rooms those with Type of room set to anything other than Heated room the NCM activity is undefined and is not displayed NCM activity Each heated room defined as a room for which Type of room is set to Heated room mu
15. to meet the relevant requirement in some other way The broad requirements of L2 are set out in the Requirement section of Approved Document L2A referred to in this document as L2A They cover Reasonable provision shall be made for the conservation of fuel and power in buildings by a limiting heat gains and losses through i thermal elements and other parts of the building fabric and ii pipes ducts and vessels used for space heating space cooling and hot water services b providing and commissioning energy efficient fixed building services with effective controls and c providing the owner sufficient information about the building the fixed building services and their maintenance requirements so that the building can be operated in such a manner as to use no more fuel and power than is reasonable in the circumstances The detailed requirements are outlined in Section 0 General guidance under the heading Demonstrating Compliance Five criteria must be satisfied paragraph numbers refer to L2A Criterion 1 the calculated CO emission rate of the building as constructed the building emission rate BER must not be greater than the target rate the target emission rate TER which is determined by following the procedures set out in paragraphs 18 to 23 Criterion 2 the performance of the building fabric and the heating hot water and fixed lighting systems should be no worse than the design limits set out in parag
16. BEM developed by BRE or Approved commercial software The L2 2006 VE SBEM software falls into the second category The requirements tested by the software are Criteria 1 amp 2 amp 3 which are implemented in the software as follows Criterion 1 Achieving an acceptable building CO emission rate BER The BER and TER values are obtained from the simulated carbon dioxide emissions of two buildings The actual building which forms the basis of the BER calculation is the building as designed but subject to standard operating conditions dictating levels and patterns of occupancy internal gain and minimum ventilation The notional building which forms the basis of the TER calculation is a version of the actual building modified in accordance with rules relating to glazing area insulation and system efficiency These rules are related to the standards laid down for the 2002 Elemental Method The notional building is also subject to the standard operating conditions The notional building is created within the BRE SBEM tool Both buildings have monthly heat balances performed for standard weather data appropriate to the building location Results are automatically fed into the BRUKL compliance calculator provided by BRE The standard operating conditions are functions of the building type and the activities occurring within each room They are laid down in the National Calculation Methodology NCM It is important to n
17. Integrated M Environmental Solutions Limited Building Regulations Part L2 2006 amp Part F VE SBEM User Guide lt Virtual Environment gt 6 0 Page 1 of 35 lt Virtual Environment gt design simulate innovate Integrated Environmental Solutions Limited Contents 1 TROGUCUONN m 3 1 1 What is VE SBEM intei cti nece eii cei Pu E Po ai TR PER DS aiaa aiiai 3 1 2 Overview of Part L2 2006 VE SBEM ssssssssssssseeseeeenneen tenens trn entente niin innen nnns 4 1 3 Methods and Requirement ccccecccceesenceeeeseeeeeeeneeeeeeesaeeeceesaaeeseesaeeeceeaeeseeeeeeeeneeeeeeeneneeeeenenees 5 1 4 Overview of VE SBEM interface features enne nennen nennen nns 6 2 Guidance on performing Part L2 2006 assessments 8 2 1 Fundamentals of Part L2 2006 sse ener nnne n nnnm snnt nenne nnne 8 2 2 Organisation of Part L2 2006 compliance analysis in the VE sss 9 2 3 Real actual and notional buildings essssssessssssseeeseee eene enne nnne nene 11 2 4 Steps in performing a VE Compliance analysis 13 2 5 Tips for Passing Part E28 ire beo eeta ten iubeo a 20 3 Part L2 2006 VE SBEM AnalysIS m esntreeieis tan knan bap pap cuUxEx RE RA ERR RE RENE ER M REUS 22 3 1 ilie tneedenets 22 3 2 Calc lati pm
18. This appendix sets out the calculation of the emission rates BER and TER used in the Part L2 2006 Criterion 1 compliance test The CO variables used in the calculation can be viewed in Vista Cse total System elec CE Cst total Total system CE Clt total Total lights CE assumed to be electrical Note that carbon emissions associated with Equipment energy consumption are not taken into account in the BER and TER calculations BER calculation Electrical carbon emissions Cse and Clt are subject to adjustment factor Fe as follows see L2A Table 3 If power factor 0 9 Fe 1 0 If 0 9 lt power factor lt 0 95 Fe 1 0 01 0 99 Page 34 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited If power factor gt 0 95 Fe 1 0 025 0 975 Lighting energy consumption is adjusted with factor F1 as follows If there is metering and warning of out of range values Fl 0 95 otherwise Fl 1 0 Applying these factors the revised carbon emission figure to be carried forward to the BER calculation is BER Ost 1 Fe xCse FexFlxClt TER calculation Notional building carbon emissions rate NER Cst CIt TER NER 1 0 Improvement Factor x 1 0 LZC Factor where L2A Table 1 Improvement Factor varies between 0 15 and 0 2 depending on the carbon emissions from the naturally ventilated areas weighted against emissions from the air conditioned areas
19. a based thermal bridging coefficient Constructions may be assigned to building elements in either Apache View or lt VE gt Compliance Note that VE SBEM assumes the ground floor U values entered in CDB have already been corrected in accordance with EN ISO 13370 This also means the floor area perimeter method of calculating the ground floor should not be used because it does not incorporate this correction This is different from iSBEM which does allow uncorrected U values with SBEM applying the correction internally Step 4 Set building type and general data At this stage you may wish to go to lt VE gt Compliance and set up some of the high level data required for the compliance analysis First check that the Regulatory framework selector is set to Part L2 2006 ApacheSim In the Building settings box near the bottom of the screen select a building type from the list This indicates the type of building for Part L2 purposes and determines what room activities can be specified in the building It also automatically sets the Building Category which determines glazing areas in the notional building For a building with multiple use the various parts can be analysed by including NCM activities from other NCM building types This is a new feature in version 5 6 Not all zones may need to be included in a compliance run for example separate buildings may exist within the same model The part s of the building includ
20. ance with Criterion 4 will be met post construction as part of the pre Construction report 2 5 Tips for Passing Part L2a The following measures should be considered when attempting to achieve a pass for the Building CO Emission Rate Criterion 1 Many of them will also benefit summer temperatures Criterion 3 They are listed in rough order of importance Systems Substantial reductions in building emission rate can be achieved by improving HVAC efficiency The UK NCM System Data Wizard provides options for changing a range of system settings and parameters For systems that are not covered there it is permissible to enter appropriate parameters in the Apache System dialogue provided they can be justified on the basis of manufacturers data Fuel choice has a major effect on carbon emissions Specific fan power SFP is a parameter that has a significant effect on system performance The Non Domestic Heating Cooling and Ventilation Compliance Guide defines requirements for a number of features including SFP These are potentially onerous requirements that need to be taken into account from the start of projects Designers need to be careful to allow large enough plant and riser space to ensure that these requirements can be met Note that default values for SFP in the UK NCM System Data Wizard which mirror those in iSBEM tend to be somewhat high often exceeding the Criterion 2 requirement These therefore need to be edited The
21. ble settings For example the heating system s Generator seasonal efficiency and Heating delivery efficiency are linked to the SCoP by the relation SCoP Generator seasonal efficiency x Heating delivery efficiency so that in terms of carbon emissions they can be viewed as secondary to the SCoP On the cooling side an analogous relationship exists between SSEER and the following parameters EER the cooling system generator energy efficiency ratio or COP CDE the cooling delivery efficiency and HRP the heat rejection pump and fan power fraction namely SSEER EER CDE 1 EER 1 HRP In terms of carbon emissions EER CDE and HRP can thus be viewed as secondary to the SSEER Page 17 of 35 Virtual Environment fies Integrated Environmental Solutions Limited These secondary parameters are important for certain design tasks in Apache View for example the calculation of boiler and chiller loads But for lt VE gt Compliance SCoP and SSEER are the key efficiency measures Auxiliary energy value is a concept that has been developed in connection with the NCM methodology This parameter indicates the power consumption of fans pumps and controls associated with the space heating and cooling systems It is expressed in terms of Watts per square metre of floor area served and is incurred when the heating and cooling systems are running Parameter values can be entered directly into the Apache System d
22. bs First on the General tab fill in the address and contact details Then move to the Building amp System Performance tab This contains data required by the BRUKL compliance checker that collates the calculation results and generates the compliance report Building air permeability at 50 Pa this is not yet available in VE SBEM Location Description optional Project Complexity Level 3 4 or 5 Related party disclosure optional Stage of analysis As built or As designed The remaining parameters appear in the box labelled Adjustment for management features These settings allow credit to be taken in the BER calculation for management features applied to electrical power and lighting Electric power factor Lighting systems have provision for metering Lighting systems metering warns of out of range values The final tab deals with Thermal Bridging which SBEM applies to all junctions If nothing is changed on this tab the default psi values shown will be used To obtain non accredited defaults for any or all of the non metal clad junction types uncheck the box es on the right before clicking the Restore defaults button Step 11 Perform compliance run When you are satisfied that the actual building model is defined as intended click on the button CO2 Emissions Part L compliance The progress of the SBEM calculation is indicated on the screen Results from both buildings together with data prov
23. d only rarely use this type for a glazing cavity that has been modelled as a separate room for calculation purposes Unheated buffer space use this type for other types of unheated space attached to the building but lying outside the insulated building envelope Examples are car parks and lean to outbuildings Internal void or warm roof use this type for floor and ceiling voids and for roof spaces that lie inside the insulated building envelope ie with insulation at rafter level In the case of the first three types listed above all representing types of unheated buffer space an external ventilation rate must also be entered for the purpose of calculating U values for Criterion 2 All the above types of room are excluded from the floor area summation upon which the emission ratings are based The settings NCM Building type and NCM Activity together specify the activity assigned to the room for the compliance analysis which in turn via the NCM Template sets the standard conditions applied for occupancy and plant operation While these attributes are optional in the Room Template it is a good idea to set them there to save effort in VE Compliance Page 15 of 35 Virtual Environment design simul fies Integrated Environmental Solutions Limited The building regulations tab has specific SBEM information reference should be made to the BRE iSBEM user manual for description of terms Within this section the a
24. de covers Part L2 the section of the regulations covering non domestic buildings in England and Wales The following guidance is aimed at providing an overview of the implementation of the regulations in the lt VE gt software 2 1 Fundamentals of Part L2 2006 New Part L2 regulations came into force on May 6 2006 and apply to non domestic buildings beginning construction after this date The regulations requiring designers to demonstrate significant reductions in carbon emissions from building energy use relative to the standards set by the previous 2002 edition of the regulations This is achieved by performing a detailed analysis of the carbon emissions of two buildings The actual building the building as designed but subject to standard patterns of occupancy and plant operation and The notional building a version of the building that conforms to standards similar to those applying in the Part L2 2002 Elemental Method The notional building is subject to the same occupancy and plant operation patterns as the actual building The analysis must demonstrate that the actual building s carbon emissions improve on those of the notional building by a specified margin 2896 for an air conditioned building It is this improvement that constitutes the tightening of the regulations in the 2006 edition The analysis of carbon emissions must be performed with accredited software applying the National Calculation Methodology NCM such a
25. ding address Insurance company Policy number Effective date Expiry date PI Limit 4 2 Building Details Location Description Project Complexity Related party disclosure Stage of Analysis As built or As designed EPC fixed at As built Page 23 of 35 Virtual Environment fies Integrated Environmental Solutions Limited Adjustment for management features These settings allow credit to be taken in the BER calculation for management features applied to electrical power and lighting Electric power factor Lighting systems have provision for metering Lighting systems metering warns of out of range values EPC EPC This section has additional EPC data the first two UPRN Date must be filled in correctly because the unique Certificate number will be generated from them UPRN Inspection Date Does the building have special conservation status Welsh language EPC required District Heating District heating can be taken into account for Enter a carbon dioxide conversion factor if this is known Otherwise use the default value 4 3 Thermal Bridging Restore defaults 4 4 EPC EPC Recommendations The available NCM recommendations are listed by Category which can be selected from the left hand list Another way of selecting NCM recommendations is through the Code selector at the top NCM recommendations cannot be deleted The user may modify NCM recommendation data except the Text and
26. dling plant Insulation of pipes ducts and vessels Lighting Criterion 3 Passive control measures to limit overheating Criterion 3 requires all spaces in the building without air conditioning to have a low risk of overheating see SBEM Technical Manual for a definition of this SBEM v3 0 is the first version of SBEM which assesses the building against this criterion 1 4 Overview of VE SBEM interface features The lt VE gt Compliance view offers the following Methods which may be selected using the Method selector on the lt VE gt Compliance toolbar ApacheSim ApacheSim EPC SBEM SBEM EPC This Guide covers the last two methods above in conjunction with selecting either Part L2 2006 or Part F from the Regulatory Framework selector on the toolbar The Regulatory Frameworks all share core features of the lt VE gt Compliance view such as the model workspace the browsers the menus and the toolbars For a description of these please consult the lt VE gt Compliance View User Guide Page 6 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited Actual and notional buildings For the ApacheSim Method a selector labelled Current model appears at the right hand side of the lt VE gt Compliance toolbar This allows you to switch between displaying the actual building and the notional building For both SBEM methods this selector disappears as the notional building
27. e Room Data Building Regulations tab and may optionally be specified by means of the corresponding attribute in the Room Template The activity which is always associated with a particular building type exists solely for the purpose of building regulations and is only used by lt VE gt Compliance Setting the room activity automatically assigns the correct NCM Template and all the data associated with it The name of the NCM template together with that of the room template can be seen displayed on the General tab of the Room Data dialogue Not all the Room Data is set by the NCM Template Just as in Apache View each room in lt VE gt Compliance has a Room Template and this sets the parts of the Room Data that are not covered by the standard activity settings namely User supplied Room Data System characteristics Measures to improve the efficiency of lighting systems Infiltration rates The Room Data displayed and used in VE Compliance is thus drawn partly from the NCM Template and partly from the Room Template as follows The data on the Room Conditions tab is drawn entirely from the NCM Template These parameters which include set points and operation times for heating and cooling plant and hot water demand are fixed for Part L2 by the room activity and override the corresponding settings in the room template Page 12 of 35 Virtual Environment fies Integrated Environmental Solutions Limited The data on the
28. ed in a particular analysis is defined by the settings of the check boxes Include room in Building Regs analysis for each room on the Room Data Building Regulations tab Step 5 Create or import room templates An efficient way to assign Room Data is by means of Room Templates A Room Template contains a collection of settings that define the internal conditions applying in a room of a given kind By defining these conditions centrally you can assign them quickly to large numbers of rooms and transfer them readily to other models via the Import Template mechanism Room Templates contain data arranged on tabs under the headings Building Regulations Room Conditions Systems Internal Gains and Air Exchanges Not all this data is used in VE Compliance assessments some being overridden by standard settings It is therefore important to understand where and how the various components of Room Template data are used In particular if you do not intend to use the analysis options available in Apache View which analyses the real building you do not need to set Room Template data on the Room Conditions and Internal Gains tabs or create air exchanges of the Auxiliary Ventilation type Page 14 of 35 Virtual Environment fies Integrated Environmental Solutions Limited One of the attributes that can usefully be set in the Room Template is the NCM Activity which is always partnered with an NCM Building Type If these attributes are set
29. egulations data such as the room activity is specified on the Building Regulations tab SBEM specific data including all Lighting data is also entered on this tab The internal gain data for the room s Building type and Activity is read by SBEM from its own copy of the NCM database so Room Data s Internal gain and Air exchange tabs are not visible as they would be for the ApacheSim method Building regulations construction data Building regulations data relating to constructions for instance whether a window is classified as display glazing is entered via fields labelled Building Regulations within the construction data dialogues in APcdb Part L analysis and results The Part L analysis and results dialogue on the lower edge of the VE Compliance view is divided into two parts Page 7 of 35 lt Virtual Environment gt fies Integrated Environmental Solutions Limited lt Regulation Framework name gt Analysis facilities for specifying the Part L analysis to be performed Results facilities for viewing the results of the analysis There is also a button for the VE SBEM version of Building and System data 2 Guidance on performing Part L2 2006 assessments The lt VE Compliance gt View provides the means to test compliance with the conservation of fuel and power requirements of the UK building regulations including the 2006 regulations applying in England Wales and Scotland This User Gui
30. emented where necessary by inputs specific to the requirements of the selected Regulation This data is used to produce an input file for the BRE tool SBEM v3 0 The lt Virtual Environment gt launches the BRE SBEM tool with the input data file and the BRE SBEM tool performs a compliance assessment or generates an EPC Results of the VE SBEM analysis are presented as follows 1 Compliance document PDF file plus Calculation Summary one page of graphs as a PDF file and Calculation Details more detailed breakdown as a HTML file or 2 Energy Performance Certificate PDF and Recommendations Report PDF XML files are also generated for lodgement in official databases Page 3 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited 1 2 Overview of Part L2 2006 VE SBEM The requirements of The Building Regulations Part L2 2006 edition as applied to new buildings are set out in Approved Document L2A This document should be consulted in the course of any submission for Part L2 compliance The function and scope of the approved documents is set out in the Use of guidance section Approved Documents are intended to provide guidance for some of the more common building situations However there may well be alternative ways of achieving compliance with the requirements Thus there is no obligation to adopt any particular solution contained in an Approved Document if you prefer
31. even if SBEM would have triggered them Grey USER recommendations will not appear at all Note at SBEM v3 0 some information in the VE interface does not appear in the Recommendations Report as follows Assessor comment Energy impact CO2 saved per spent Applicable to a specified HVAC DHW System The Payback does not appear directly but does define the layout and order of the Report as described above 5 Room Data actual building 5 1 Room Data in the context of Part L2 2006 Each room has a set of attributes that describe conditions within it This data known as Room Data provides input to the thermal analysis programs In the VE SBEM Compliance view Room Data is divided into four categories General Room name and ID Templates floor area and volume data Building Regs room attributes for Building Regulations compliance checks Room Conditions heating and cooling set points and room thermal modelling settings System parameters describing the system serving the room For most thermal applications a single set of Room Data applies to each room However for Part L 2006 the picture is complicated by two factors 1 Special room conditions are stipulated for Part L2 2006 compliance analyses 2 There is a notional building which has room conditions that differ in some respects from those in the actual building Page 25 of 35 Virtual Environment fies Integrated Environmental Solutions Li
32. gn and other non regulations purposes a third building The real building this is the building as designed and with the occupancy and plant operation conditions expected to apply in reality rather than the standard conditions stipulated for Part L2 compliance The real building is the building presented in Apache View where the special conditions required for Part L2 2006 do not apply The testing of carbon emissions constitutes Criterion 1 of Part L2 The full set of criteria is as follows Criterion 1 Achieving an acceptable building CO2 emission rate BER Criterion 2 Limits on design flexibility this sets minimum standards for building fabric and system performance Criterion 3 Limiting the effects of solar gains in summer this imposes limitations on solar gains and temperatures in those parts of the building that are not provided with comfort cooling systems Criterion 4 Quality of construction and commissioning this lays down requirements that the building must meet after construction Not covered by VE Compliance Criterion 5 Providing information certain information must be provided to the owners of the building Not covered by VE Compliance Users of the VE Compliance software are strongly advised to study the official documents defining the regulations 2 2 Organisation of Part L2 2006 compliance analysis in the VE In the IES Virtual Environment all building regulations comp
33. h to measure the performance of the actual building The notional building is subject to the same occupancy and plant operation patterns as the actual building Unlike L2 2006 ApacheSim the notional building for VE SBEM cannot be viewed in VE Compliance as it is created internally by the BRE SBEM tool The real building Users interested in compliance testing only will not need to consider the real building as an entity distinct from the actual building They can thus bypass Apache View They should however be aware that certain room template attributes are overridden in VE Compliance Aside from this point which is covered in more detail below the real building does not need to be considered further in the context of VE Compliance The actual and notional buildings however can usefully be described in more detail The actual building The actual building allows you control over the following aspects of the design which it shares with the real building Data shared between actual building and real building Location Geometry including orientation and glazing Constructions System characteristics including renewables Infiltration rates permeability Page 11 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited The actual building differs from the real building in terms of its occupancy and plant operation which for the purpose of Part L2 2006 are forced to
34. ialogue But it will usually be appropriate to make use of the UK NCM System Data Wizard to assist this task The UK NCM System Data Wizard has been based on the analogous facility in iSBEM Its purpose is to guide you through the process of describing the system properties and to generate values for the three key parameters In addition to the key parameters mentioned so far there are other system parameters of importance such as heating and cooling system fuels and ventilation heat recovery effectiveness These are also generated automatically from data entered in the wizard More information on using the wizard is provided in the lt VE gt Compliance User Guide New nomenclature for heating cooling efficiencies has recently been introduced that aligns lt VE Compliance gt with the NCM Definitions of these can be found in the DCLG document Non Domestic Heating Cooling and Ventilation Compliance Guide This is freely downloadable from the DCLG website http www odpm gov uk index asp id 1 130726 SCoP and SEER values for commonly available plant can be found at www eurovent certification com The DHW system wizard enables the definition of the delivery efficiency storage and the secondary circulation efficiencies and pumping power The DHW heating demand can be derived from a solar water heating system This system will use solar power when available to pre heat the water for the DHW system A storage system can be defined fo
35. ided on the Building amp System Data dialogue is then fed into the BRUKL compliance calculator The calculations performed there to produce the Building CO Emission Rate BER and Target CO2 Emission Rate TER are set out in Appendix B When the process is complete a summary of the result of the Part L2 analysis will be displayed on the Results tab and you can click on a button to display the compliance document generated by BRUKL Any failures are shown in red text in the document Page 19 of 35 Virtual Environment fies Integrated Environmental Solutions Limited Step 12 Review revise and repeat as necessary If the result is a pass for all of Criterions 1 3 you may move on to the next stage Otherwise you will need to improve the design and try again Step 13 Collate and submit results Assuming a successful outcome the Part L2 2006 compliance process is now complete in relation to those aspects that can be tested before construction The reports generated together with appropriate supporting evidence can now be submitted to Building Control The content of Part L submissions should be agreed in advance with the local Building Control officer as there may be differing interpretations during the early stages of implementation of the new regulations These are likely to be resolved over time as a sufficient number of Competent Persons are trained and accredited It may be necessary for instance to agree how compli
36. ir permeability zone ventilation supply amp extract destratification fans and SBEM lighting data can be defined Room conditions taken entirely from NCM template The data set on this tab in the Room Template will be ignored in lt VE gt Compliance but it will be used for assessments of the real building in Apache View In VE Compliance the data on this tab can be viewed but not edited It is taken from the NCM Template as part of the specification of standard occupancy and plant operation conditions System taken from Room Template The data set on this tab in the Room Template will be used in both VE Compliance and Apache View In either of these views data on this tab is initially taken entirely from the Room Template but as usual you have the option to override this data in individual rooms For compliance assessments the important parameters on the System tab are the following In the Systems box HVAC system this indicates the Apache System serving the room s space conditioning needs DHW system this indicates the Apache System serving the room s hot water needs including any solar energy system In the System outside air supply box Free cooling flow capacity this indicates the maximum intake of outside air that is available for free cooling In the case of a naturally ventilated room a value of 5 ach would be typical to model ventilation by window opening In the case of an air conditioned room
37. large door c wall or roof element that is not to be treated as a door for the purposes of Part L d smoke vent Note VE SBEM treats this as a personnel door e high usage entrance doors _ _ S_ Doors of types b d and e form special categories in Part L Type c is provided to allow door drawing facilities in ModellT to be used to create wall or roof elements 6 3 Ground floors Do not use the floor area perimeter method to auto calculate U values for VE SBEM because this does not correct the value in line with EN ISO 13370 6 4 All construction categories Thermal bridging coefficient This is not used by VE SBEM The psi values for different junction types metal clad and non metal clad in Building Settings are used instead Note however that the Metal Cladding setting in CDB will be used by VE SBEM to determine which of the two possible psi values applies 7 Part L2 2006 VE SBEM Results This tab on the dialogue at the lower edge of the lt VE gt Compliance screen allows you to view the results of Part L2 2006 calculations Because the results are very different SBEM and SBEM EPC methods are discussed separately 7 1 SBEM method Building Emissions Rate BER The Building Emissions Rate kgCO m2 calculated for the actual building Notional Building Emissions Rate The Building Emissions Rate kgCO m2 calculated for the notional building Crotionai Page 31 of 35 Virtual Environment
38. liance testing is performed in the VE Compliance View This covers the 2002 and 2006 regulations for England and Wales as applied to both dwellings and non dwellings together with their counterparts in Scotland Page 9 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited The starting point for a compliance analysis however is the input of geometrical data in ModellT The Template Manager a central resource available from all Views is typically used next to set up room system and ventilation parameters Apache View while not essential for compliance testing commonly plays a part in the input of Part L data that is shared by other Apache View application and Views such as SunCast and MacroFlo may also be invoked The purpose of this section is to provide an overview of the roles played by the different parts of the lt VE gt in the compliance testing process ModellT handles the input of the building geometry The Template Manager provides facilities for setting room conditions for a range of thermal applications In the context of Part L2 it also allows the specification of room activities that define the standard occupancy and plant operation conditions that apply in Part L2 2006 In Part L2 compliance tests these standard conditions automatically override certain of the Room Data settings that would otherwise be taken from the Room Template Apache View covers thermal applicati
39. mited This section deals with the conditions in the actual building Here certain room conditions are taken from data entered by the user these are often specified by means of a Room Template and others are dictated by the conditions laid down in the NCM methodology for the particular building type and activity applying to the room in the main these are taken from an NCM template Each tab of the Room Data dialog must be considered separately to gain a full understanding of the way the NCM rules are applied The basic content of the Room Data tabs and the procedures for editing it are described in the lt VE gt Compliance and Apache User Guides as these features are common to all thermal applications and Regulatory Frameworks The exceptions and special rules applying to Room Data in Part L2 2006 are described below 5 2 Room Data General tab actual building With one exception data displayed on this tab is the same for all thermal applications The exception is the NCM Template which is displayed only for Part L 2006 NCM Template The template automatically assigned to the room as a function of its activity see Building Regs tab to specify those aspects of Room Data that are dictated by the NCM methodology for use in L2 2006 compliance calculations 5 3 Room Data Building Regs tab actual building The content of this tab varies with the Regulatory Framework so is covered in its entirety here rather than
40. ntered in this box on the Building amp System Data Building amp System Performance tab produce useful reductions in the Building Emission Rate BER Constructions Improving U values will tend to reduce heating but may increase cooling demand in air conditioned buildings Increasing the solar performance of the glass by reducing the solar gains into the building can reduce cooling requirement but may also increase heating demand To assess which option U value or solar performance will have the greatest effect perform a test run on the actual building and look for the dominant load Buildings with high internal gains and large areas of glazing will almost certainly be cooling dominated Increasing the thermal mass of the building for example using exposed ceiling slabs will tend to reduce cooling demand and moderate summer temperatures Page 21 of 35 lt Virtual Environment gt design simulate fies Integrated Environmental Solutions Limited Infiltration The air permeability of the building envelope has to conform to the standard set by Criterion 2 namely a permeability of 10 m hr m at 50 Pa corresponding to an air leakage index of 15 m hr m Guidance in CIBSE TM23 indicates that this permeability typically gives rise to an air infiltration rate of about 0 25 ach An improved permeability can be assumed to produce an improved infiltration rate in proportion Note that while reducing infiltration rates
41. ons such as heating and cooling loads calculation and calculation outside the context of Part L The analysis in this View applies to the real building for which all the input data is under your control Where data is shared between the real building and the actual building this data may be entered in either Apache View or lt VE gt Compliance Examples of such shared data include Constructions Infiltration But for VE SBEM the following can only be entered in lt VE gt Compliance Location HVAC systems Renewables in this case SBEM modelling is simpler than ApacheSim s lt VE gt Compliance covers thermal analysis specific to the Building Regulations Some of the data required by the Building Regulations is shared with Apache View as indicated above and may be entered or edited in either View Other regulations specific data must be entered in the lt VE gt Compliance view This includes Regulatory framework eg Part L2 2006 assumed in the list that follows Building type Room activities may be specified by means of templates Data relating to lighting energy savings Heat bridging data Stage of analysis Design or As Built Data required by the BRUKL compliance calculator including addresses system characteristics and air tightness properties lt VE gt Compliance displays data for the actual building by default The notional building may also be inspected in this View Page 10 of 35 Virtual Environment
42. ons tab Step 7 Create and assign HVAC and DHW Systems It is recommended that HVAC and DHW systems characteristics for VE Compliance analysis are specified within the framework of Apache Systems Apache Systems provide a robust and uncomplicated system model that has been harmonised with that provided in iSBEM with the aim of providing a point of reference and common ground between these alternative compliance methods Systems are one of the aspects of building design where substantial carbon emissions improvements can be introduced The system data is therefore under your control and it is shared between the real building as displayed in Apache View and the actual building as displayed in VE Compliance The Apache System HVAC model has three key parameters which can be defined in summary as follows SCoP the efficiency of the heating system SSEER the efficiency of the cooling system if present Auxiliary Energy Value energy required for fans pumps and controls These are the most important parameters featuring in the calculation of the energy consumed by the space heating and cooling systems Taken together with the fuels specified for heating and cooling they encapsulate most of the important data about system performance in relation to carbon emissions On the Apache System dialogue there are other parameters that are linked with the heating and cooling system efficiencies and do not represent independently edita
43. ote that the stipulation of standard operating conditions for L2 2006 compliance calculations means that results as calculated for L2 2006 will in general be different from those calculated for the real building for example in Apache View or for the L2 2002 Carbon Emissions Calculation Method Page 5 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited To obtain the TER the CO2 emissions for the notional building are modified by certain factors as set out in the General Guidance section L2A under the heading Regulations Details are set out in L2A The purpose of these factors is to tighten the requirement on the actual building so that its performance exceeds that of the notional building By this means the 2006 regulations impose a measurable degree of improvement over the standards applied in the 2002 regulations Criterion 2 Limits on design flexibility Criterion 2 imposes constraints on U values and other aspects of building and system performance Maximum and mean U values for different classes of construction must not exceed stated values The software applies checks for compliance with this requirement before performing the actual and notional building calculations Conditions are also laid down in the following areas see L2A section headed Design limits for building services Controls Energy metering Heating and hot water service systems Cooling plant Air han
44. r the solar water heating system Note that Apache Systems may be imported from other projects on the back of Room Templates allowing system data to be transferred between projects Step 8 Define renewable systems Four renewable systems are available for use within the actual building CHP Wind PVs and Solar water heating CHP should be sized to provide the base load of heating for the building and the power generated will be used to offset the electrical energy usage in the building Wind and PVs will when the prevailing weather conditions permit provide electrical energy that will offset electrical energy usage in the building Page 18 of 35 lt Virtual Environment gt fies Integrated Environmental Solutions Limited Step 9 Set or check fuel carbon emission factors The carbon emission factors to be used in L2 2006 compliance assessments are stipulated in the NCM methodology for a range of fuels The Fuels Data facility in Apache View and lt VE gt Compliance allows fuel carbon emission factors to be edited The default values are those which conform with NCM For compliance runs any departure from these values or use of fuels not on the NCM list would need to be carefully justified in supporting documentation Step 10 Set Building amp System Data We now return to the Building amp System Data dialogue to prepare for the compliance calculations For VE SBEM Building amp System Data is distributed over three ta
45. raphs 33 to 62 Criterion 3 Those parts of the building that are not provided with comfort cooling systems have appropriate passive control measures to limit solar gains Criterion 4 the performance of the building as built is consistent with the prediction made in the BER Criterion 5 The necessary provisions for enabling energy efficient operation of the building are put in place L2A should be consulted for details of special considerations and exemptions applying to particular classes of buildings Page 4 of 35 Virtual Environment design simul fies Integrated Environmental Solutions Limited Some of the requirements of Part L2 cannot be tested in software Criteria 4 and 5 fall into this category However IES aims to provide software covering all requirements that can be so tested 1 3 Methods and Requirements By contrast to L2 2002 the 2006 regulations offer only one compliance route This has some similarity with the Carbon Emissions Calculation Method in the 2002 regulations though there are important differences The 2006 regulations have no counterpart of the L2 2002 Elemental or Whole building methods Within the single compliance route for L2 2006 a choice is permitted regarding the analysis tool used to calculate the BER and TER The carbon dioxide emission calculations that form the basis of these performance indicators can be calculated using either The Simplified Building Energy Model S
46. s VE Compliance or BRE s iSBEM program By contrast with the 2002 regulations where a choice of three compliance routes was offered the 2006 regulations stipulate a single compliance procedure This has much in common with the Carbon Emissions Calculation Method CECM of the 2002 regulations but there are important differences including the following The actual building s performance must not merely match but significantly improve on that of the notional building Page 8 of 35 Virtual Environment fies Integrated Environmental Solutions Limited Assessments must be performed under standard occupancy and plant operating conditions This means that under the new regulations some of the data entered by the user to model the building for design work has to be replaced by different data for the purpose of compliance analysis Requirements on the control of summertime solar gains apply to the actual not the notional building and only to rooms without mechanical cooling In this respect the 2006 notional building sets a slightly less demanding performance target than the 2002 notional building In terms of analysis methodology the most significant change with respect to the 2002 Carbon Emissions Calculation Method is the requirement for standard occupancy and plant operating conditions The consequence of this is that in addition to the actual and notional buildings the designer will usually need to model and analyse for desi
47. sesnisnnsbonsienansinnioins 31 7 1 SBEM Method rm Eeoae 31 7 2 SBEM EPG method UEM 33 Page 2 of 35 Virtual Environment design simul fies Integrated Environmental Solutions Limited 1 Introduction 1 1 What is VE SBEM VE SBEM is a facility within the Virtual Environments VE Compliance view providing facilities for either testing compliance with various Building Regulations or generating energy performance certificates EPCs for the same Regulations An alternative route to compliance is offered with the ApacheSim facility refer to the Part L2 2006 ApacheSim User Guide for further detail Part L2 2006 Regulation applies to new buildings other than dwellings in England and Wales for which construction did not start before 6 April 2006 Part F Regulation applies to new buildings other than dwellings in Northern Ireland for which construction did not start before 6 April 2006 Part L 2002 applies to buildings in England Wales and Northern Ireland for which construction started before 6 April 2006 If construction had not started before that date the 2006 edition of Part L2 or Part F applies VE SBEM analysis is not available for Part L 2002 Virtual Environment Thermal category VE Compliance view Part L2 2006 Part F Data for the VE SBEM analysis is taken from the lt Virtual Environment gt model suppl
48. signed to the room In Part L2 2006 certain Room Data settings are under your control via the room template which may be overridden in individual rooms and others are set automatically by the NCM template This is explained in the context of each of the Room Data tabs in the sections which follow A brief account of the data used to populate the various tabs appears on the tab title bar 5 4 SBEM specific data SBEM data Air permeability at 50 Pa 10 m3 m2 h Ventilation amp exhaust Exhaust ACH 0 8 ism be Specific fan power 1 5 WA s Specific fan power 1 5 WA s Does extract serve multiple rooms Are there destratification fans in this room Deadleg DHW pipe length in this room m 0 00 SBEM lighting data Page 28 of 35 a a i s g A NACIAN eI MN gg 745 5 i lala f ATE lt Virtual Environment gt design simulate innovate v r M lt Virtual Environment gt design simulate innovate integrated Environmental Solutions Limited SBEM data for air permeability ventilation and lighting is entered via the SBEM data and SBEM lighting data within the building regulations tab This data follows the requirements laid down in the BRE iSBEM user manual x m Available information Full design carried out with total wattage 10 00 wm gt and design illuminance 0 00 lux Lighting chosen but not calculated 0 00 Lumens per circuit Watt Lighting parameters not available Lamp type
49. st be assigned an NCM activity This defines the standard operation pattern of the room for the purpose of L2 2006 which is defined by attributes on the various Room Data tabs The assignment of these Room Data attributes is effected by the NCM template corresponding to the activity Each NCM building type has a predefined list of NCM activities available to its rooms Once the model building type is defined in Building Settings the associated activities will be available to heated rooms in the building and can be assigned using the NCM activity attribute It is recommended that the NCM activity is set in the Room Template This saves work as it means that the activity will be automatically set for all rooms assigned that template An NCM activity is only meaningful in the context of a building type so this too must be set in the template If no activity is specified in the template the room s NCM activity will revert to the default activity for the model building type If the NCM activity is set in the template and is compatible with the model building type it may like other template settings be overridden in the room by un ticking the Template check box and selecting an alternative activity from the drop down list For unheated rooms those with Type of room set to anything other than Heated room the NCM activity is undefined and is not displayed In this case a special NCM template called NCM unheated space is automatically as
50. standard patterns linked to the activity associated with each room The data in this category is Activity NCM Template Room Data Occupancy Equipment gains Lighting levels expressed in terms of illuminance Room conditioning heating and cooling set points and operation periods Minimum ventilation rates For the purpose of Part L2 2006 compliance analysis this data is outside your control and cannot be edited Note that these attributes are present in the Room Template for use in Apache View analyses but the settings appearing there are overridden in the Part L analysis The standard settings for lt VE gt Compliance are brought into the room by means of a second template called the NCM Template which is applied in combination with the usual Room Template The NCM Template contains the standard operating conditions as listed above associated with the room s NCM activity For example a room assigned the activity Open plan office in a building of type Office has an NCM Template called NCM Office Open plan office This contains the occupancy and equipment gains the lighting level and profile the room conditioning settings and the minimum ventilation regime laid down as standard for NCM assessments of an open plan office NCM Templates appear in the list of Room Templates in the Template Manager where they can be examined in detail The activity sometimes called the NCM activity is assigned to the room on th
51. then three things occur The recommendation changes from green to blue in the list The bottom frame shows EDITED The Revert to NCM button becomes enabled Revert to NCM will discard the user s changes and reverse the above three actions The user may add new recommendation s in the current Category using either the Add or Copy buttons These appear blue from the beginning and can be deleted The user may exclude any recommendations green or blue from consideration by SBEM by double clicking the tickbox in the list These then change from green or blue to grey Double clicking the cross back to a tick will include them again and return to the original colour Page 24 of 35 lt Virtual Environment gt fies Integrated Environmental Solutions Limited In the Recommendations Report the recommendations will appear as follows Section a Green NCM recommendations triggered by SBEM and with a payback of less than 3 years listed in increasing order of payback Section b Green NCM recommendations triggered by SBEM and with a payback of 3 to 7 years listed in increasing order of payback Section c Green NCM recommendations triggered by SBEM and with a payback of over 7 years listed in increasing order of payback Section d Blue NCM recommendations triggered by SBEM and all blue USER recommendations no trigger for these listed in increasing order of payback Grey NCM recommendations will not appear at all
52. ting values are shown on the EPC Part LRating CTER G standard x 50 Typical Rating Ctypical Gsiandard x 50 View EPC Click on this button to view the Certificate PDF Page 33 of 35 Virtual Environment design simulate innovate fies Integrated Environmental Solutions Limited View Recommendation Click on this button to view the Recommendations Report PDF As noted at the end of Section 4 4 some of the Recommendations data in the VE interface is not output by SBEM v3 0 Extra output files Two further output files are copied to the project s Regs SBEM EPC folder and may be of interest Both are in comma separated format lt buildingname gt _not_sim csv The calculation details for the Notional building lt buildingname gt _dr csv The data reflection report for the Actual building In this folder you will also see the XML file to be lodged in official databases References 1 The Building Regulations 2000 Approved document L2A Conservation of fuel and power in new buildings other than dwellings 2006 edition The Stationery Office Free download available 2 BS EN ISO 13789 1999 Thermal performance of buildings Transmission heat loss coefficient Calculation method 3 National Calculation Methodology document in preparation 4 IP 17 01 Assessing the effects of thermal bridging at junctions and around openings Tim Ward BRE East Kilbride Appendix A Calculation of BER and TER
53. ts amp doors connecting heated rooms with this space will be treated as external This type is included to cover cases where a glazing cavity is treated for modelling purposes as a separate space Unheated buffer space this room type applies to spaces such as car parks unheated stairwells and other spaces that form a buffer between the conditioned areas of the building and the outside This type should only be assigned to spaces lying outside the insulated building envelope Rooms assigned this type will not be explicitly modelled in the notional building but incorporated in the elements linking the unheated space with adjacent conditioned spaces Internal void or warm roof this room type applies to ceiling and floor voids and to warm roofs those with insulation at rafter level This type should be applied to unheated unoccupied spaces that lie within the insulated building envelope Note Where a space is subdivided for calculation purposes into separate levels connected by holes there are 3 possible approaches to the assignment of Type of room a Combine all the levels into one space b Assign the upper levels the same type of room and activity as the occupied space at floor level They will then be heated and ventilated like that space but will not receive gains because their floor area will be zero c Assign the upper levels the type Internal void or warm roof so that they will be unheated A drawback with
54. where the outside air is brought in via the system it would be usual to express the value in l s m and a value of 0 5 in l s m would be typical Note that this figure represents the additional outside air intake over and above the minimum ventilation level Free cooling is covered further in the User Guide Parameters on the System tab that can be ignored are Auxiliary ventilation system this is not applicable because under the NCM conventions there is no conditioning of ventilation air Sizeable parameters shown in blue sizing plays no part in VE Compliance Humidity limits these are disabled for VE Compliance assessments in line with the conventions applying in the NCM systems approach Flow rate and profile for System outside air supply in VE Compliance this type of air supply is replaced by standard ventilation patterns handled by Auxiliary Ventilation air exchanges Page 16 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited The setting of data on the System tab is closely linked with the setting of data in Apache Systems which is dealt with below Internal gains taken from NCM Template lighting editing permitted The lighting data for VE SBEM is defined via a button on the Building regulations tab Air exchanges auxiliary vent from NCM Template other vent from Room Template Air exchanges are covered by the SBEM data on the Building regulati
55. will tend to lower heating energy it may increase cooling energy by reducing the building s ability to dispose of internal heat gains 3 Part L2 2006 VE SBEM Analysis This dialogue on a tab at the lower edge of the VE Compliance screen deals with general data required for Part L2 2006 VE SBEM compliance analysis It also provides the means to execute compliance calculations Results from the compliance calculations are displayed on the neighbouring Results tab The Analysis and Results tab will be visible provided no room is selected Both SBEM and SBEM EPC methods are covered in this section with differences for the EPC method highlighted in italics 3 1 Building settings This frame handles the input of general data required for Part L 2006 VE SBEM calculations Building type The building type for the L2 2006 compliance analysis sometimes referred to as the NCM building type The NCM methodology requires the building to be assigned a type such as Airport terminal Hospital or Office For each building type there is a set of activities that can be assigned to rooms in the building optionally via templates and which dictate the conditions assumed in those rooms The building type also determines the building category which is used to set the glazing percentages in the notional building Building Category For each building type a Building Category is automatically set This determines gla
56. zing in the notional building Set Building amp System Data This button displays the Building amp System Data dialogue which is also accessible via the Settings menu Page 22 of 35 Virtual Environment design simulat fies Integrated Environmental Solutions Limited 3 2 Calculations Only the CO2 Emissions button is available for VE SBEM EPC a single Generate EPC button appears 3 3 Tools This frame provides shortcuts to tools for setting the following model data Site location and weather data SBEMlocate Constructions Building Templates Apache Systems 4 L2 2006 Building amp System data This pop up dialogue which may be accessed either via the Building Settings button Set Building amp System Data or via the Settings menu allows you to enter general data relating to the building and its systems required by the SBEM calculation Both SBEM and SBEM EPC methods are covered in this section with differences for the EPC method highlighted in italics following EPC 4 1 General These entries provide data for the BRUKL compliance document Please avoid unusual characters Any commas entered will be automatically changed to spaces Building name street address EPC 3 lines city postcode Building occupier name telephone street address city postcode Certifier name telephone street address city postcode EPC Assessor number Accreditation scheme Qualifications Trading name Tra
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