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JPA Designer User Manual

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1. 21 9 1 Heat sources Community heating and hot water schemes can be fed by a variety of heat sources in cluding conventional boilers heat pumps combined heat and power systems and even geothermal The Heat sources box lists the sources for domestic hot water Figure 21 7 sources can be added and edited using the buttons next to the box e the New button which opens the Heat source dialogue ready for new data e the Edit button which opens the Heat source dialogue showing the selected heat source e the Delete button which removes the selected heat source The Heat Source dialogue Figure 21 8 requires e the type of heat source selected from the Heat source drop down e the fuel selected from the Fuel drop down e the proportion of the total energy load provided by that source Enter a fraction between 0 and 1 in the Heat fraction box e the efficiency of that heat source Enter as a percentage in the Efficiency box For most sources the efficiency will be less than 100 but for heat pumps the effi ciency may be considerably higher CHAPTER 21 WATER HEATING 117 Figure 21 9 Data entry for solar water heating Solar panel details Solar collector type Direction Overshading Aperture area of collector net m 2 40 Evacuated tube collector South Heavy gt 80 sky blocked Zero loss collector efficiency 0 60 fos collector SE SW Significant gt 60 80 sky blocked Collector heat loss coeffficient 3 00 S
2. Conservation of Fuel amp Power in Dwellings SAP 9 90 Building 3 S4P 9 90 Dwelling TER DER 32 66 19 68 oOo 39 7 Level 3 Achieved U value QO parn K Opaque elements worst area weighted Pitched roofs insulated between joists Pitched roofs insulated between rafters Pitched roofs with integrated insulation Flat roofs Sloping walls skillings cambceils Walls Floors Ground floors Windows doors amp rooflights Average U value 1 80 1 800 of floor area B 14 66 11 7 4rr Overheating risk Not significant O Total carbon dioxide emissions 0 0 kg year SAFP G 0 91 60 El value 84 40 Average HLF 1 24 CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 77 Figure 16 2 Tool tip showing the primary cause of failure Average wall U value too high 5 The TER and DER results with the percentage reduction of the DER against the TER and Code for Sustainable Homes CSH level that reduction represents Later versions of the software also display the Fabric Energy Efficiency FEE The CSH level is only a guide for the carbon emissions component of the Code it is not a full evaluation against the Code 6 Fabric U values for opaque elements floors walls roofs and for openings In each line the first number shows the worst highest U value and the second the area weighted average 7 Overheating risk assessment 8 Carbon dioxide emission and SAP results including the Heat Loss Parameter HLP
3. 9 Compliance zone This shows green for a pass and red for a fail If the dwelling does not comply you can hold your mouse cursor over this zone to show a tool tip identifying the primary cause of failure Figure 16 2 Double clicking on the zone will open the Compliance Checklist The tool bar buttons are shown in Figure 16 3 the majority of them open the SAP 9 90 2009 Worksheet Values dialogue at different tabs 16 6 Project information in SAP General information about the dwelling such as the client project address and type of dwelling in the Project Information dialogue Figure 16 4 This dialogue is also used to set some of the dwelling details some of which are used for the EPC a number of calculation options 16 6 1 Address details The client and project address details are shown on all the calculation outputs You can enter the details in two ways e type the information directly into the Project Information amp Options dialogue or e use the information which you set for the whole JPA Designer project in the Project Information dialogue in the Project Manager window CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 78 Figure 16 3 Buttons on the SAP toolbar 0 OAB MAAOHAOA A OW d 43 JPA Designer ER File Edit View Help Bronne S Aal ME ow O O O O OOOO Conservation of Fuel amp Power in Dwellings SAP 9 90 Building 1 SAP 9 90 Dwelling Tr mrm Returns to Project Manager Opens the Print dialogue
4. comments suggestions for improvements or proposals for enhancements to suit your specific needs In order to lodge and issue EPCs in England and Wales and Northern Ireland you will need to be a member of an accreditation scheme You can find details of our partner schemes at www techlit co uk training accreditation CHAPTER 1 INTRODUCING JPA DESIGNER 3 1 1 JPA Designer modules JPA Designer is a modular program so you need only buy the modules which give you the functions you want to use the current modules are e SAP 2010 calculates SAP ratings to the SAP 9 90 specification and tests new dwellings for compliance with the requirements of Building Regulations and Build ing Standards This module will also calculate SAP ratings to SAP 9 81 9 80 and 9 70 e Uvalue 2010 calculates U values of building elements taking account of repeating thermal bridges using the methods in ISO 6946 for exposed floors walls and roofs and the method in ISO 13770 for ground floors and basements It also calculates K values e Uvalue 2010 Professional analyses the risk of interstitial condensation to ISO 13788 and carries out elemental U value calculations to ISO 6946 and ISO 13770 and value calculations When you buy a licence for a JPA Designer module you will receive a key code to enable you to use that module The other modules on the program will be visible but will only work in demonstration mode and will not display calc
5. e The average depth from the external ground surface to the basement floor h me tres e Details of the insulation in the basement floor CHAPTER 11 BASEMENT U VALUES 56 Figure 11 2 Entering data for basement walls Ground Floor Details cs Basement floor dimensions Basement Details for ISO 13370 PA 0 40000 Calculate it v him 24 w m 0 300 Perimeter rm 40 Area nm 100 lambda 1 500 Defaut Basement floor insulation When calculating basement WALL U values add the basement walls and any insulation in to the main window as layers ISO 13370 suggests you include the masonry wall 300mm thick with a conductivity of 1 7 4 m K Calculation of basement WALL U values requires details of the basement FLOOR including any insulation and the Perimeter and Area When calculating basement WALL U values add any basement FLOOR insulation in to the box on the right eee nsulation name ali Insulation thickness mm 0 0 Insulation conductivity W mK 0 000 Description e The thermal conductivity of the ground A W mK Table 11 1 and annex G of BS EN ISO 13370 To calculate a basement wall U value 1 Create a new U value calculation in the Project Manager window and open it for editing 2 In the U value Construction dialogue set the Element Type to Basement Wall enter an Element description then click OK The Ground Floor Details dialogue opens figure 11 2 3 Enter the Perimeter Area ratio P A
6. e the CPSU as a separate timer for the heating store e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide CHAPTER 21 WATER HEATING 114 e the primary pipework between the boiler and tank is insulated tick box only dis played if boiler feed is selected required by Domestic Building Services Compli ance Guide e there is a separate timer for the domestic hot water If the dwelling has solar panels complete the Solar panel details section of the Water heating tab section 21 10 21 8 MicroCHP or heat pump In these systems the hot water is provided by either a domestic sized combined heat and power microCHP system_or by means of a heat pump entered by means of the Product Characteristics Database section 22 2 For a microCHP system the only options are whether there is e asummer time immersion heater for hot water e a hot water vessel within the microCHP system e a separate timer for domestic hot water For heat pump the standard method is to accept the database values in which case it is only necessary to specify whether there is e a summer time immersion heater for hot water e a hot water vessel within the microCHP system e a separate timer for domestic hot water However it is possible to override the values by ticking Override heat pump database values The tab now shows the Hot water t
7. Exit to Project Manager Opens the SAP Project Information dialogue Opens the Overall Dwelling Dimensions tab Opens the Ventilation Rate tab Opens the Roofs Walls and Floors tab Opens the Doors Windows and Rooflights Openings tab Opens the Water Heating tab Opens the Main Space heating Primary tab Opens the Secondary Space heating tab Opens the Overheating tab QPOO OOOOH OHO Opens the Photovoltaic and alternative technologies tab CHAPTER 16 JPA DESIGNER SAP 2009 MODULE Figure 16 4 The Project Information dialogue Project Information amp Options Client name amp address Project address Mr A T Builder v Brownfield Mews Mr A T Builder The Old Yard Tawnyville Suedeshire Post Code PostCode BN12 3DR UPRN Phone 01234 567 89C Fax 01234 567 891 Email bob thebuilder co uk Add to clients Edit clients list Reference certificate Date 16 December Plot drawing Building type End terrace house z 79 Country England or Wales x EPC Language English Location Thames Valley hd Project type New dwelling as designed X Related party disclosure No related party _ Treat low E glass coating as soft V Enter gross opaque element areas Boiler comes under the exception procedure allowed in Part L I inherit P OK x Cancel CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 80 To enter new project details 1 In the SAP module select Ed
8. Double glazed air filled low E En 0 2 1 44 1 70 Back PYC u 12mm hard coat West W13 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PYC u 12mm hard coat East w1 Window Double glazed air filled low E En 0 2 0 76 1 70 Front PYC u 12mm hard coat E ast W2 Window Double glazed air filled low E En 0 2 0 76 1 70 Front PYC u 12mm hard coat East W3 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PYC u 12mm hard coat E ast w4 Window Double glazed air filled low E En 0 2 3 99 1 70 Back PYC u 12mm hard coat West W5 Window Double glazed air filled low E En 0 2 1 26 1 70 Right PYC u 12mm hard coat South W6 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PYC u 12mm hard coat East Ww Window Double glazed air filled low E En 0 2 1 44 1 70 Front PYC u 12mm hard coat East w8 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PYC u 12mm hard coat E ast W9 ainda Newihle alazed air filled lnwi F Freaf 144 170 Rark Patia 12mm P D New gt Edit Duplicate it Delete Change U value of selected Double click on the opening in the list in the Openings tab The Edit Doors Win dows and Rooflights dialogue opens Alternatively you can select the opening then click the Edit button Make your changes then click OK To delete an opening 1 2 3 Select the opening in the list in t
9. There are two items of additional data which the software collects for producing the EPC which appear on the Primary heating tab e Separated conservatory with fixed heater Tick this box if the dwelling has a ther mally separated conservatory see SAP guidance section 3 3 3 for the definition of thermally separated which has a fixed heater within it e Dwelling in smoke control area This box is only relevant if solid fuel is set as the fuel for the primary or secondary heating If the dwelling is within a smoke control zone the use of house coal and dual fuel is not permitted and wood is permitted for an exempted appliance only For further information on smoke control areas see www smokecontrolareas co uk Tick the box if the dwelling is within a smoke control area 23 Secondary heating A secondary heating system is an additional space heating system for the dwelling com mon examples are gas fires or wood burning stoves Where a secondary system is pro vided it should be included in the calculation guidance on when to include a system is given in Approved Document L1A paragraph 4 12 The fraction of space heating pro vided by the secondary system is defined in table 11 of the SAP 2009 document Data on secondary heating is specified using the Secondary heating tab Figure 23 1 To specify secondary heating 1 Set the Group drop down to Room heater systems 2 Select the Sub group 3 Select the System 4 Select the second
10. measured in metres by its value psi value The heat loss rate from all the junctions is added together to give the total rate of heat loss at junctions Htb An alternative simplified method_of calculating Htb can be used in some cases this simplified method is described in subsection 19 4 2 Further information on the treatment of linear thermal bridging can be found in Appendix K of the SAP document 19 4 1 The Htb calculation An accurate calculation of Htb requires the length and w value of each junction The length should be obtained by measurement from the design drawings it is acceptable to sum the length of separate junctions of the same type for example adding together the lengths of all the window jambs The w value can be obtained from a number of sources CHAPTER 19 WALLS ROOFS AND FLOORS 98 Figure 19 4 The Junction dialogue Junction Junction type Sill 1 For these junctions half the value of linear thermal transmittance is applied to each dwelling 2 This is an externally supported balcony the balcony slab is not a continuation of the floor slab where the wall insulation is continuous and not bridged by the balcony slab Value is applied to each dwelling Description stone sill Achieved linear thermal 0 080 Detail length m 10 105 transmittance W mK Source of value Table K1 Accredited detail Cancel Not accredited detail Default oemnmadtad halanmi ha atinan nf tha flanar
11. 0 04 Internal External Inside 69 6 RH 82 0 RH Rsi 0 10 5C 20 15 C 10 5 0 5 C 15 2 2 The Dewpoint graph The Dewpoint graph plots the predicted temperature through the construction with dew point temperature for the worst month Condensation is predicted at any interface where the two lines touch see Figure 15 2 The orientation of the Dewpoint graph is deter mined by the building element walls are shown with layers running vertically and roofs with layers running horizontally To open the Dewpoint graph select View gt Dewpoint graph from the menu bar or click the Dewpoint graph button on the tool bar To view the results for the month with the greatest evaporation click on the Summer radio button in the Results to show section 15 2 3 The Results table The Results Table shows the headline results for each interface in the construction To view the Results table select View gt Results Table from the menu bar When the table is The dewpoint temperature is the temperature at which saturation vapour pressure would occur Any lower temperature would result in condensation CHAPTER 15 ASSESSING THE RISK OF INTERSTITIAL CONDENSATION 70 open click the Always on top box to keep it visible on screen while you continue to work on the calculation When you have finished click Close to close the Results Table For calculations to ISO 13788 the significant columns are e ISO Winter worst build up the month in which the h
12. 2005 rating if you have selected the 2009 rating you may find you have entered a value which cannot be achieved by any boiler in the database 22 3 The main primary heating systems There are seven main groups of primary heating system the following sections describe how to enter data for the each group In all cases except community heating schemes start by using the drop boxes to set the Note that none is not an acceptable heating option for a new dwelling CHAPTER 22 PRIMARY HEATING 121 e Group Sub group System e Fuel Heating controls Always work from Group downwards as the options in the lower drop boxes change according to the selections made higher up Once you have set all the drop boxes you should enter any other requirements for that group then enter any additional data 22 3 1 Central heating systems with radiators or underfloor heating This group covers wet central heating systems with radiators underfloor pipes or fan coil units the heat can be provided by gas oil solid fuel or electric boilers heat pumps or microCHP units To specify such systems set e the Group Sub group System Fuel Heating controls and Electricity tariff e the Heat emitters Note that when Sub group is set to Heat pumps the additional option of Fan coil units is shown It is possible to combine underfloor heating with radiators tick Underfloor heating also has radiators e the efficiency of the boiler subs
13. 30 mm profile with 130 mm actual depth of insulation use a value of 130 30 100 mm 16 Enter the details for the brackets in the Correction for mechanical fasteners section Enter the thermal conductivity of the brackets usually 60 00 W mK for mild steel the number of brackets per square metre calculated by dividing the total number of brackets by the total element area and the cross sectional area of the brackets measured at the thickest point The value of alpha 1 6 is the default setting for these constructions Finally use the drop down to select the layer which is bridged by the brackets Click OK 9 3 Inverted roofs In inverted roofs often known as protected membrane roofs some or all of the thermal insulation is applied above the waterproof membrane and restrained by aggregate or other ballast Rainwater falling on the roof can percolate to the waterproofing membrane and increase the rate of heat loss To allow for this effect a rainwater cooling correction factor dUr has to be applied to inverted roof calculations the rainwater cooling factor is described in section 8 3 Because you have to indicate the layer or layers affected by the CHAPTER 9 COMPLEX CALCULATIONS 44 Figure 9 4 Inputting data for rainwater correction Element Type Flat roof v Inverted Ext insulation layers X 9 040 p 3 000 Paving slab ballast VI XPS 70 mm Vi XPS 120 mm Waternranf membrane Pitch roof horizontal ceiling
14. 4Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings CLG 2005 http www planningportal gov uk uploads br BR_PDF_PTL CONDBOILER pdf CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 82 Figure 16 5 Tabs on the SAP 9 90 2009 Worksheet Values dialogue Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating PY amp Alt Tech Figure 16 6 The buttons on the SAP Worksheet Values dialogue OK Cancel Apply Help lt lt Last Next gt gt e Primary heating the main heating system controls and fuel chapter 22 e Secondary heating any additional heating system chapter 23 e Overheating and cooling details for summer overheating and any fixed cooling systems chapter 24 e PV amp Alt Tech Photo voltaic panels wind turbines and new renewable technolo gies chapter 26 To open the dialogue at the start of a calculation click on the Dwelling dimensions button on the toolbar or select Edit gt Dwelling dimensions The tabs are listed at the top of the dialogue in the same order as they appear in the Edit menu Figure 16 5 To move between sections simply click on the tabs We recommend you start with the Dwelling Dimensions tab and work from left to right finishing with the PV amp Alt Tech tab At the bottom of the dialogue are a series of buttons Figure 16 6 e OK Revises the calculation taking account
15. Insulation conductivity W mK 0 000 Screed TEN 50 Insulation width mm 0 Screed conductivity W mK 1 150 BSL 26 canes 10 1 Ground floor details The Ground Floor Details dialogue contains the data which describes the ground and the floor structure Figure 10 1 It has five sections Floor type The choice of floor type will determine how other parts of the dialogue appear Floor dimensions Deck Suspended ground floor details Edge insulation 10 1 1 Floor type There are three types of ground floor Do not use this method to calculate U values of floors over open or unheated spaces such as car parks or garages instead select floors other than ground floors in the Construction dialogue box and proceed as usual CHAPTER 10 GROUND FLOOR U VALUES 51 e Solid a floor which bears directly on the ground with no void between the floor structure and the ground for example a ground bearing concrete slab e Suspended block and beam with a void between the floor deck and the ground with the deck formed from pre cast concrete beams infilled with concrete blocks or proprietary insulating units e Suspended a floor with a void between the floor structure and the ground with a timber deck supported on timber joists Use the Floor Type radio buttons to select the type of floor construction 10 1 2 Floor dimensions The thermal resistance of the ground is determined from the ratio of the floor s perimet
16. Rainscreen cladding box New data entry boxes appear see Figure 8 3 4 Enter values for x and n Click OK If you do not have project specific values you can carry out an initial calculation using the default values for x and n CHAPTER 8 CORRECTION FACTORS 39 Figure 8 4 Data entry for elements separating heated and unheated spaces Elements separating heated and small unheated spaces see ISO 6946 sec 5 4 Area of all components between 0 00 Area of all components between inside amp unheated space Ai unheated space amp outside Ae 0 00 m 8 5 Elements separating heated and unheated spaces The rate of heat loss through an element which separates a heated space from an unheated space will be lower than that through an identical element which separates a heated space from outside as the relatively warm air within an unheated space acts as a thermal buffer The combined method for calculating U values allows for this effect using the ratio of e the surface areas of the elements which separate the heated space from the unheated space Ai to e the surface areas of the elements which separate the unheated space from outside Ae When measuring Ai and Ae you should include walls and intermediate floors such as that over an integral garage but exclude ground floors Ai and Ae are measured in m To allow for unheated spaces 1 From the menu bar select Edit gt Construction type The U value Construction dia logue
17. assessments under the Code for Sustainable Homes The SAP 2009 module uses the SAP 9 90 methodology to calculate the Target Carbon Dioxide Emission Rate TER and the Dwelling Carbon Dioxide Emission Rate DER The module also checks for compliance against a number of other criteria set out in Approved Document L1A and in the Domestic Building Services Compliance Guide Whilst this section of the manual gives instructions on how to enter data into the program it does not offer authoritative guidance upon SAP 9 90 nor the Building Regulations We suggest you use this manual in conjunction with the government s guide to SAP available from the BRE web site www bre co uk sap2009 Approved Document L1A and the Domestic Building Services Compliance Guide both available as PDFs from the Planning Portal www planningportal gov uk Carrying out a SAP 2009 calculation using JPA Designer is straight forward The main SAP window shows the on going results of the calculation and the compliance status of the dwelling while the SAP Worksheet Values dialogue allows you to enter the data required for the calculation Once you have finished entering data you can print off the results or make adjustments to the data 16 2 Determining compliance There are five criteria against which a new dwelling is tested to determine whether or not it complies with the requirements of Part L In order to issue an EPC you will need to be a member of a government ap
18. both the menus and the toolbars in addition some may also have keyboard shortcuts To prevent this manual becoming repetitive we generally refer only to the menus If you have a problem with the functioning of the software please follow these steps e Download and install the latest version of JPA Designer from our web site tion 2 2 for instructions and see if that resolves the problem e Check the forum and FAQ on our web site http forum techlit co uk to see if the problem is addressed there e If the problem persists email details of the problem to support techlit co uk Please include details of your computer system and attach sample files or PDF outputs where possible We will respond as soon as we can If you have difficulty using the program for example you are uncertain how to treat an integral garage in a SAP calculation please follow these steps e Consult the program manual or on line help system e Check the forum and FAQ on our web site http forum techlit co uk to see if the query is addressed there e Consult the official SAP specification and associated documents e If you are new to U value or SAP calculations you should consider attending one our training courses which provide a thorough introduction to the software and its use We offer distance learning on line and live training sessions www techlit co uk training 2 Getting started This section of the manual describes how to install JPA Designer o
19. button The FGHRS database dialogue opens 1 Select the Manufacturer 2 Select the type from the Available list 3 Click OK Where the FGHRS has a photovoltaic array feeding directly into a close coupled store the PeakkW Pitch Direction and Overshading of the PV array should be set in the FGHRS PV Module section CHAPTER 26 RENEWABLES 134 26 6 Other allowable generation There are some sources of electricity which cannot be included in the calculations for Building Regulations compliance but can be included for other calculations particularly those to demonstrate zero carbon homes status Code for Sustainable Homes level 6 and for the Northern Ireland low and zero carbon homes scheme Electricity from such sources should be entered in the box Additional allowable elec tricity generation for box ZC6 ZC6 is the box number on the zero carbon homes calculation see section 16 of the SAP 2009 document Electricity generated by wind turbines linked to a development by private wire may be entered here 27 Special features SAP 2009 includes a procedure for including new technologies in calculations in the intervals between revisions of the SAP The Appendix Q procedure which is named after the appendix of the SAP document in which it is described may only be used for products which have been independently assessed and are listed on the Appendix Q web site at http www sap appendixq org uk The web site has a calculation spreads
20. buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 If the dwelling has solar panels complete the Solar panel details section of the Water heating tab see section 21 10 21 4 Community heating scheme The hot water for dwellings heated by community heating schemes can provided by im mersion heaters or by a heat exchanger fed from the scheme In all cases specify the hot water tank heater There may be additional data required depending on the configuration of the system e Where there is neither a hot water tank nor a heat exchange in the dwelling no further data is required e If there is a hot water tank within the dwelling tick DHW cylinder within dwelling the standard data boxes for a Hot water tank will then be displayed Enter the tank details section 21 1 and tick DHW cylinder within dwelling e If there is no tank and the hot water is provided by a heat exchanger tick DHW cylinder within dwelling the standard data boxes for a Hot water tank will then be displayed Enter the volume of the heat exchanger and details of its insulation and tick DHW cylinder within dwelling If the dwelling has solar panels complete the Solar panel details section of the Water heating tab section 21 10 21 5 Multi point gas water heater or heat exchange built into a g
21. calculation is based on a previous version of SAP but the EPC has to be issued using the current version of SAP The program takes a copy of the data from the original calculation and converts the copy to the latest version leaving the original calculation untouched You can e convert SAP 9 81 calculations to SAP 9 90 e convert SAP 9 70 calculations to SAP 9 80 9 81 e import SAP 9 60 calculations from JPA SAP v2 and convert to SAP 9 70 In each case you can convert the calculation from an older version of SAP to a more recent version but you cannot convert a calculation to an older version of SAP To convert a SAP 9 81 9 80 calculation to SAP 9 90 1 In the Project Manager window select the SAP 9 81 calculation 2 From the menu bar select Edit gt Copy selected SAP 9 8x 2005 dwelling to V9 90 2009 3 JPA Designer creates a copy of the original calculation as a SAP 9 90 calculation The copy has the same name as the original but appended with SAP version 9 90 To convert a SAP 9 70 calculation to SAP 9 80 1 In the Project Manager window select the SAP 9 70 calculation 2 From the menu bar select Edit gt Copy selected SAP 9 70 2001 to SAP 9 80 2005 dwelling 3 JPA Designer creates a copy of the original calculation as a SAP 9 80 calculation The copy has the same name as the original but appended with SAP version 9 80 The 9 80 calculation can then updated to 9 81 by ticking the SAP version 9 81 box in the Project Infor
22. constructions you will then need to adjust the Proportion bridged to allow for additional bridging material such as cross noggins and other framing in timber framed walls You can find recommended standard proportions in the BRE publication BR 443 Conventions for U value calculations e The thickness of the bridging material In most cases the bridge thickness will be the same as that of the main material of the layer To enter thermal bridging details 1 Use the Bridge type radio buttons to determine whether the bridging is 1 dimen sional or 2 dimensional The Edit material dialogue now shows the Thermal bridge section If you are not sure whether the bridging is one or two dimensional clicking the Help button will open a guidance window the annotation on the help diagrams match those on the data entry boxes 2 Select the bridging material from the Bridge description drop down The program sets the Bridge thermal conductivity If you are using an unusual bridging material you can enter your own description then enter the conductivity manually 3 Enter the Bridge width in mm 4 Enter the Non bridge width in mm 5 For two dimensional bridging enter the Non bridge height in mm 6 If necessary change the Proportion bridged value to a standard value The software adjusts the Bridge width accordingly 7 Set the bridge thickness by selecting Follows material thickness or selecting Fixed at then entering thickness in mm In
23. for analysis is to use the same internal temperature throughout the year If no project temperature has been specified use 20 C as a default value for a UK building e Internal relative humidity Int RH this is largely determined by the type of activity which will take place within the building ISO 13788 defines five occupancy types with different humidity characteristics BS 5250 2002 suggests relative humidity ranges for those types see Table 15 1 The internal relative humidity is affected by the external conditions e External Temperature Ext T and External Relative Humidity Ext RH the exter nal conditions depend upon the building s location JPA Designer includes external temperature and humidity data from 20 sites around the UK allowing you to se lect the nearest location to the project site 4 For a worst case scenario select Eskdalemuir The data is entered using the Environmental conditions dialogue which allows you to enter data for analysis using ISO 13788 or BS 5250 1989 The default calculation method is ISO 13788 to use the previous BS 5250 1989 calculation method see section 15 3 To set the environmental conditions 1 From the menu bar select Edit gt Environmental conditions The Environmental con ditions dialogue opens 2 Select the humidity class using the Internal humidity class dropdown The Int RH column is completed 3 Enter the internal design temperature in the Internal temperature box The Int
24. information required is the vapour resistivity and resistance data for the materials in the construction and the environmental data for the building and site To carry out condensation risk analysis 1 Build up an element in the same way as you would for a U value calculation 2 Ensure vapour resistance properties have been defined for each layer chapter 7 3 Set the environmental conditions section 15 1 4 View the results section 15 2 Please note the module can not carry out condensation risk analysis for ground floors basements nor constructions containing variable layers neither will it calculate the risk of surface condensation BS 5250 2002 Code of practice for control of condensation in buildings BS EN ISO 13788 2002 Hygrothermal performance of building components and building elements Internal surface temperature to avoid critical surface humidity and interstitial condensation Calculation methods gt The BS 5250 1989 Appendix D method is based on the same underlying principles as the method set out in ISO 13788 but i analyses condensation risk for a 60 period rather than the whole year and ii reports results in a different way 66 CHAPTER 15 ASSESSING THE RISK OF INTERSTITIAL CONDENSATION 67 15 1 Environmental conditions The condensation risk calculation requires mean monthly data for e Internal temperature Int T the design temperature inside the building in degrees Celsius The default
25. is issued at the end of every month To ensure you are using an up to date version of the database JPA Designer checks the issue date every time you start the program if the database is more than a month old the software prompts you to download the latest version You can also download the database yourself To download the database 1 With your web browser go to www boilers org uk 2 On the home page click on Download the Boiler Efficiency Datafile 3 Right click on the Download button for SAP 2009 unzipped file dat and choose Save target as The download begins The dat file is larger than the others but is simpler to install On a broadband internet connection the difference in size is negligible 4 In the Save As dialogue select the PA Designer 981 folder and accept the suggested file name bedf2009 dat 5 At the warning bedf2009 dat already exists Do you want to replace it click Yes 6 At the Download complete dialogue click Close 7 In the JPA Designer Project Manager window select File gt Re load Product Char acteristics Data File 22 2 2 SEDBUK efficiencies One of the significant differences between SAP 2005 and SAP 2009 is a change in the calculation method for SEDBUK efficiency ratings for boilers the change has resulted in the general lowering of efficiencies Whilst JPA Designer allows you to enter either 2005 or 2009 SEDBUK ratings you should be ensure you do not enter a value compatible with the
26. is usually not based on individual room heaters Data on the primary heating system is entered using the Primary heating tab Figure 22 1 22 1 Dwellings with two main heating systems SAP 2009 can account for the uncommon case of a dwelling having two main heating systems which are designed to heat the house together This should not be confused with secondary heating appliances such as gas fires or wood burning stoves which are designed to provide additional heat for individual rooms The two systems may be con figured to heat the all the dwelling together or to heat parts of it separately To specify two heating systems 1 Tick Dwelling has two main heating systems The program now displays a pair of radio buttons Main heating system 1 and Main heating system 2 Figure 22 2 2 With Main system 1 selected enter the proportion of the dwelling s space heating demand which is provided by that system in the Fraction box the fraction should be in the range 0 0 1 0 3 If both systems heat the whole house tick the box Both systems heat whole house This affects the treatment of the hot water system 4 Specify the first system in the Primary heating tab 5 Click Main system 2 and specify the second system in the Primary heating tab You can always switch between the systems using the radio buttons the large number at the top right of the Primary heating tab indicates which of the two systems you are working on 118 CHAPT
27. k value 28 CHAPTER 7 WORKING WITH MATERIALS 29 Figure 7 1 The Edit Material dialogue r a Edit Material gt u Material Description Short code Category Polyisocyanurate 855250 Thickness Thermal Thermal Vapour Vapour rom conductivity resistance resistivity resistance W mK PK AW MNs gm MNs g 100 0 0 030 3 333 450 000 45 000 Denes thor 45 0 n Specific heat capacity J kg K 0 0 Type Bridge type Normal Fixed Vapour Resistance Clear Cavity None Help Composite Membrane Bridged Cavity 1 dimensional Is thermal insulation Vented Cavity 2 dimensional Thermal bridge Bridge description Timber v Proportion bridged 0 19 Bridge width mm 97 059 x1 Non bridge width mm 550 x2 Non bridge height mm n a iF Bridge thermal conductivity W mK 0 13 Bridge thermal resistance n K W 0 76923 Bridge thickness Z Follows material thickness 100 0mm Fixed at 100 0 mm Second bridge ir gap correction delta 0 01 wek 2 Hep XK cma e Thermal resistance the resistance to heat transfer provided by the layer measured in m K W e Vapour resistivity the rate of transfer of water vapour through 1 m of the material measured in MNs gm e Vapour resistance the resistance to water vapour provided by the layer measured in MNs g The following two values are only required for k value calculations e Density the mass per cubic metre of the material measured in kg m e Speci
28. mF K Enter areas INcluding doors windows rooflights Area including glazing r U value W mK Link to this U value calculation y Description Effective thermal resistance 0 of unheated space Ru Perimeter rm Cost r x Cancel CHAPTER 19 WALLS ROOFS AND FLOORS 95 19 2 The Element dialogue The Element Dialogue is used to enter data on each of the dwelling s opaque elements see Figure 19 2 it takes the following data e Element Use the drop down to set the type of element from the list The element type is used for checking average U values so it is important to set the right element type e Curtain wall Tick this box if the wall element consists of curtain walling Curtain walling has to be treated differently from normal walls in order to obtain the correct values for heat loss and solar gains The area of wall should be entered as normal but the U value set to that of the whole curtain wall system The window area should also be that of the whole facade with the same U value e Construction the drop down lists a number of common constructions for the spec ified element type and offers a quick way of setting the heat capacity for the ele ment Alternatively you can leave the construction blank and enter the heat ca pacity directly e Party wall type this drop down is only displayed if the Element is a party wall For a party wall between two dwellings select the appropri
29. must work on a duplicate clone of the category or material Cloning a category creates a new category containing the same materials as the original To make changes to the Products database you must first open the Edit database dialogue Figure 14 1 by selecting Edit gt Database from the main menu To add a user defined category 1 Click the New category button 2 Enter the name of the category in the New category dialogue 3 Click OK The new category is created To rename an existing user defined category 1 Select a category by clicking on it 2 Click the Edit category button The Edit category dialogue opens 3 Enter a new name then click OK The category is renamed To clone a category 61 CHAPTER 14 EDITING THE PRODUCTS DATABASE 62 Figure 14 1 The Edit Database dialogue Edit Database Categories Products Flooring A Black Sheathing Felt 3 00mm Insulation loose Cement Partical Board 20 00mm Fibre Board 13mm 13 00mm a Lath and render 19mm 19 00mm eevee Onduline Sheet 3mm 3 00mm Metal Lined VB P V C Rigid 5 00mm Metals and glass Perlite 15mm 15 00mm nd Bindi Miscellaneous a i Render and plaster Sheet 3mm Roofing Single Ply Membrane Soil Sand and Gravel Stone Timber E Woodfibre Z 0 023 EcoTherm UK LTD x i Edit category Clone category Edit product Clone product Search database it Delete category B New cat
30. not in general use 6 2 Inserting blank layers in a calculation To insert a new blank layer 1 Select the existing layer which will be below the new layer 2 From the menu bar select Insert gt Blank layer alternatively you can press lt Insert gt The new blank layer is added to the calculation above the existing layer 3 Double click on the layer to open it for editing Because the program inserts new layers above the currently selected layer it is easiest to work from outside to inside for wall and roof calculations and from inside to outside for floor calculations 6 3 Cutting copying pasting and deleting layers Cutting a layer from the calculation removes the layer but keeps the details on the clip board To cut a layer 1 Click on the layer to select it 2 From the menu bar select Edit gt Cut layer to clipboard alternatively click the Cut button on the tool bar or press lt Ctrl X gt The layer is removed CHAPTER 6 WORKING WITH LAYERS 27 Copying a layer in a calculation copies the layer to the clipboard but keeps the original layer in place To copy a layer 1 Click on the layer to select it 2 From the menu bar select Edit gt Copy layer to clipboard alternatively click the Copy button on the tool bar or press lt Ctrl C gt The layer is copied to the clipboard Pasting a layer inserts the layer currently in the clipboard into the calculation To paste a layer 1 Click on the layer which you wan
31. opens 2 Enter the two areas in the Ai and Ae boxes see Figure 8 4 3 Click OK 9 Complex calculations 9 1 Light steel framed structure There are three different forms of light steel framed structures e Warm frame constructions all the insulation is outside the steel framing e Hybrid constructions some insulation is fitted between the steel studs and ad ditional insulation placed on the outside of the studs to reduce thermal bridging through the steel e Cold frame constructions all of the insulation is included within the thickness of the steel components and is bridged by it The high thermal conductivity of steel means the combined method must be modified for elements where some or all of the insulation is bridged by light steel framing JPA Designer uses the modified calculation method which was published in BRE Digest 465 U values for light steel frame construction The procedure for calculating the U value of a light steel framed element using JPA De signer is the same as for any other element but with the following modifications Figure 9 1 Setting the type and details of light steel frame construction Light stee frame Construction Type BRE Digest 465 Not a light stee frame Construction Warm Frame Stud depth d mm 150 0 Flange width not exceeding 50mm nae not exceeding 20mm Cold Hybrid Stud spacing s mm 400 0 Element description Steel framed wall 40 CHAPTER 9 COMPLEX CALCULAT
32. or check the box labelled calculate it and enter the Perimeter and Area separately 4 Enter the wall thickness w the basement depth h and the thermal conductivity of the ground lambda 5 Enter the details of insulation in the basement floor Either enter the name thickness and conductivity of the insulation or use the database button to select the insulation from the Products Database Click OK 6 Now add the layers of the construction in the main U value window 12 Outputting results You can print the results of U value calculations onto paper or produce a PDF file which can be opened on any computer with the free Adobe Reader software installed PDF files are ideal for emailing to people who need to see the results of the calculation but do not have JPA Designer For both print and PDF the output includes e Project information e Details of the construction e The U value and any correction factors To print results 1 Select File gt Print from the menu bar or click the Print button on the tool bar The Sections To Print dialogue opens Figure 12 1 Figure 12 1 Sections To Print dialogue 7 Sections To Print Sections to print ISO moisture table Admittance Tapered insulation Options Print TIMSA logo Jf OK X Cancel 57 CHAPTER 12 OUTPUTTING RESULTS 58 Figure 12 2 Print preview controls Page 1 of 20 2 Use the tick boxes to select whether to pri
33. the user name s and key code s you received when you bought a licence for one or more program modules To enter licence key codes 1 At the Project Manager window Figure 2 1 select Edit gt User and Security Codes from the menu bar The User Registration dialogue opens Figure 2 2 2 For each module you have licensed enter the company name and key code exactly as supplied by JPA TL Ltd If you have licensed two modules make sure you put the key codes against the correct modules The company name is case sensitive and should be written exactly as shown so if for example you enter Limited when the company name with the key code contained Ltd the program will not accept the key code In the key code 1 one and 0 zero CHAPTER 2 GETTING STARTED 7 Figure 2 2 User registration U value product details Your company name Company name as supplied U value key code AAAA 1111 2222 3333 4444 SAP product details Your company name Company Name as supplied SAP key code AAAA BBBB CCCC EEEE FFFF Call JPA on 44 0 0191 438 7997 to buy the software and obtain a Key Code x Cancel 2 4 On line licence checking Because licences for JPA Designer generally run for a year the program has to check whether your licence is still valid It does this by contacting our on line licensing database and checking the expiry date for module The program will try to check the database the first time you open a SAP or U value c
34. this option in JPA Designer 1 In the Edit material dialogue set the cavity type to vented cavity 2 From the menu bar select Options The Calculation options dialogue opens 3 Tick the box Set vapour resistance of layers above vented cavity to zero 4 Click OK The program sets the vapour resistances of all the layers to the outside of the cavity to zero 15 4 Outputting calculation results The results of condensation risk analysis can be printed or produced as PDF files in the same way as the results of U value calculations chapter 12 The main differences are 1 Before starting to print or create a PDF tick the Condensation risk box on the status bar at the bottom of the main U value window 2 In the Sections To Print dialogue review whether you want to print the summer time condensation results and the ISO moisture table and tick the appropriate boxes Part IV SAP 2009 72 16 JPA Designer SAP 2009 module 16 1 Overview of the SAP 2009 module The JPA Designer SAP 2009 module enables you to carry out calculations to demonstrate a dwelling complies with the requirements of Part L1 2010 England and Wales and section 6 of the Scottish Building Standards 2010 Scotland for Northern Ireland you should currently use SAP 2005 9 91 as the regulations have not been revised The module also lets you issue energy performance certificates EPCs for new dwellings whilst the results of calculations may be used as part of
35. whole house ventilation SPF 0 000 Wet rooms excluding kitchen 0 Efficiency of heat recovery 0 000 Decentralised mechanical whole house extract ventilation Fans Kitchen Other wet rooms SPF Number off SPF Number off inroom 0 000 0 0 000 0 S in duct 0 000 0 0 000 0 2 through wall 0 000 0 0 000 0 S Ea aa 18 3 Ventilation type 89 Set the general type of ventilation using the Ventilation types radio buttons section 2 6 of the SAP document describes the different ventilation systems If the installation has been carried out as part of an approved insulation scheme tick the Approved installation scheme The Source of mechanical ventilation parameters section determines which efficiency data the program uses e Default the performance values built into the SAP specification This is the only option for natural ventilation but for whole house ventilation pos itive input ventilation or whole house extract ventilation the default performance values in the SAP specification will give comparatively poor results e User defined allows you to enter your own performance values such as those supplied by product manufacturers 1 From the Source of mechanical ventilation parameters select User defined 2 Click the Enter details button The User defined mechanical ventilation dia logue opens and you can now enter the data Figure 18 2 CHAPTER 18 VENTILATION 90 Figure 18 3 The BRE Ventila
36. 0 2 Glass fibre 855250 0 0 0 040 0 873 0 000 3 Extruded polystyrene BS5250 50 0 0 027 0 334 0 000 4 Expanded polystyrene BS5250 50 0 0 035 0 393 0 000 5 Polyisocyanurate BS5250 100 0 0 030 0 234 0 010 For U values see variable layer list 9 5 Tapered layers Tapered insulation layers are commonly found on flat roofs where cut to falls insulation is being used to create drainage falls on an otherwise flat deck As the thickness of the insulation varies across the roof a special method is required to calculate a representative thermal resistance for that layer JPA Designer uses the method in Annex C of BS EN ISO 6946 2007 to determine the resistance of tapered insulation layers That method treats the tapered insulation layer in two parts first the minimum thickness of the layer which is laid across the whole roof then the rest of the insulation which is treated as a series of blocks with different shapes There are three types of block e blocks with rectangular plan which have their greatest thickness t on one side and slope down from that side to the other e blocks with triangular plan which have their thickest part t at the one corner and slope down to zero at the other corners e blocks with triangular plan which have their thickest part t along one side and slope from there down to the other corner Depending on its size a roof may have several blocks of each type each with different areas and in s
37. 0 X Factory Thickness mm Declared loss factor if Jacket 50 00 known k wh day Heat pump heat exchanger area 0 00 Solar panel details Solar collector type Aperture area of collector net m 2 40 Zeto loss collector efficiency 0 60 Flat plate collector Collector heat loss coefficient 3 00 Unglazed Pitch Dedicated solar storage litres 90 00 Horizontal v Separate solar cylinder 30 degrees Declared values 45 degrees Total water use of not more than 125 litres person day Hot water tank heater Single electric immersion heater Dual electric immersion heater Boiler feed From 2nd main heating system Summer immersion heater Supplemented by immersion heater Hot water only boiler z v Insulated primary Evacuated tube collector Fuel 7 V Cylinder in heated space v Cylinder thermostat Override heat pump database values DHW vessel within micro CHP v Separate timer for domestic hot water Direction Overshading South Heavy gt 80 sky blocked SEW Significant gt 60 80 sky blocked East West NE Nw Modest 20 60 sky blocked North None or very little lt 20 sky blocked Solar powered pump Required by the Building Regulations e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufact
38. 43 Conventions for U value calculations The requirements for U values for dif ferent elements are summarised in Note that for party walls between dwellings the U values must be taken from e K values kappa values this is the heat capacity of the element which expresses the amount of energy required to raise its temperature Table 1e of the SAP docu ment contains additional information about values Table 19 1 U values for party walls Party wall construction U value W mK Solid 0 0 Unfilled cavity with no effective edge sealing 0 5 Unfilled cavity with effective edge sealing 0 2 A fully filled cavity with effective sealing 0 0 CHAPTER 19 WALLS ROOFS AND FLOORS 94 Table 19 2 U values for building elements U value Notes Element Exposed element Semi exposed Party wall between dwellings Party wall similar heating pattern Party wall different heating pattern Party floor similar heating pattern Party floor different heating pattern Party ceiling similar heating pattern Party ceiling different heating pattern Internal wall Internal floor As calculated As calculated 0 00 W m2K Half calculated value 0 00 W m2K Half calculated value 0 00 W m2K Half calculated value N A N A N A Ru adjustment to U value Take area of both sides Internal ceiling Figure 19 2 The Element dialogue New Element Element Walls Curtain wall Construction Heat capacity kJ
39. 5250 1989 Appendix D Uvalue calculations are carried out in the Uvalue module by 1 Entering project information section 4 1 2 Entering key information about the building element such as the element_type e g wall floor roof and any special construction types e g metal frame ter 5 3 Defining the different layers which make up the element chapter 7 4 Adding correction factors for factors such as mechanical fasteners and air gaps in insulation layers chapter 8 5 Printing calculation results or creating PDF files of the results for emailing ker 12 You can test the effect different materials have on the thermal performance of the element by using the variable layer feature section 9 4 19 CHAPTER 4 THE JPA DESIGNER U VALUE MODULES 20 4 1 Uvalue project information JPA Designer can store and display client and project details for each calculation You can either copy client and project details which you entered in the Project Information dialogue in the Project Manager window or you can enter new data in the Uvalue mod ules You can also save and re use client data section 3 2 To copy project details from Project Manager 1 In the Uvalue module select Edit gt Project Information from the menu bar The Project Information dialogue opens 2 Click the Inherit button Any information you entered in Project Manager is copied to the Project Information dialogue here 3 Click OK To enter new pro
40. 7 1 Basic characteristics 7 2 Types of materials and cavities 7 3 Thermal bridging 8 Correction factors 8 1 Mechanical fasteners Saw oe Ap oe 8 3 Rainwater cooling 08 8 4 Rainscreen cladding 02 8 5 Elements separating heated and unheated spaces 9 1 Light steel framed structure 9 2 Twinskin metal cladding and roofing 9 3 Inverted roofs 2s se ee ee ee eS 9 4 Using variable layers 9 5 Tapered layers 10 Ground floor U values 10 1 Ground floor details Basement U values 11 1 Basement floors 11 2 Basement walls 12 Outputting results 13 U value calculation options Editing the Products database III Condensation risk 15 Assessing the risk of interstitial condensation 15 1 _ Environmental conditions 15 2 Viewing results 0 000 00 0 15 3 Using the previous calculation method 21 21 23 23 23 24 24 26 26 28 28 29 32 35 35 37 37 38 39 40 40 41 43 44 45 49 50 54 54 55 57 59 61 64 65 66 67 67 70 CONTENTS 15 4 Outputting calculation results 2 0040 IV SAP 2009 16 JPA Designer SAP 2009 module 16 1 Overview of the SAP 2009 module 16 2 Determining compliance a a a e a 16 3 Preparing to carry out a SAP 2009 calculation 16 4 Carrying out a SAP 2009 ca
41. A Technical Literature 2 5 Updates JPA Designer is continually being developed to introduce new features to get the best from the program it is worth making sure you are using the latest version To check whether there is a later version available you should compare the version number shown on our web site www techlit co uk with that of the program you are using you can find the version number by selecting Help gt About from the menu bar in JPA Designer Higher numbers and letters indicate later releases with characters coming earlier in the name being more important that later ones so 4 05a1 will be more recent than 4 04c2 and 4 05b1 more recent than 4 04a4 The three digit Build number indicates a minor change in a version Figure 2 3 shows the About dialogue for JPA Designer together with the version number on the web site in this case the software is up to date as both version numbers are the same The process for updating the software is identical to that of originally installing it but with the additional step of uninstalling your current version of JPA Designer before installing the new version To update JPA Designer 1 Use the Windows Add Remove Programs or Uninstall programs control panel to uninstall the current version of JPA Designer Uninstalling the current version will not affect your calculation files 2 Download and install the new version of JPA Designer following the instructions in 2 6 Opening a
42. Click Yes to delete the element or No to cancel the deletion CHAPTER 19 WALLS ROOFS AND FLOORS 97 Figure 19 3 The Calculate Htb dialogue Calculate Htb Accredited Achieved Detail length Linear thermal linear thermal linear thermal m transmittance x transmittance transmittance Detail length WimK W mK W K Other lintels including other steel lintels A Sill A 0 040 0 040 10 105 Jamb A 0 050 0 050 27 300 Ground floor A 0 160 0 160 17 400 Intermediate floor within a dwelling A 0 070 0 070 17 400 1 218 Eaves insulation at ceiling level A 0 060 0 060 10 200 0 612 Gable insulation at ceiling level A 0 240 0 240 7 000 1 680 Corner normal A 0 090 0 090 10 120 0 911 T from Table K1 A from approved source N from non approved source D default 14 013 For these junctions half the value of linear thermal transmittance is applied to each dwelling This is an externally supported balcony the balcony slab is not a continuation of the floor slab where the wall insulation is continuous and not bridged by the balcony slab C ma n ree 0K rera 19 4 Linear thermal bridging Besides calculating the rate of heat loss through the building elements SAP also calculates the rate of heat loss at the junctions between those elements and around openings which results from linear thermal bridging The rate of heat loss from a junction is calculated by multiplying its length
43. ER 22 PRIMARY HEATING 119 Figure 22 1 The primary heating tab Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Dwelling has two main heating systems Group Central heating systems with radiators or underfloor heating Sub group Gas boilers including LPG 1998 or later Z System Condensing with automatic ignition 102 hd Fuel Gas mains kd Electricity tariff Heating controls Delayed start thermostat programmer x Default X Heat emmiters Boiler efficiency Radiators Select from the boiler database Underfloor pipes in concrete slab Underfloor pipes in insulated timber floor Underfloor pipes in screed above insulation Use manufacturer s declared SEDBUK value Use only for 1998 or later boilers Underfloor heating also has radiators Make XYZ Model ABC Pump in heated space Declared SEDBUK 93 og SEDBUK 7 Condensing value 2005 2009 v Boiler has load or weather compensator 7 Modulating Enhanced load compensator Keep hot facility Keep hot fuel Boiler Interlock None Timed Un timed Main fuel Elec Use default value Flue Draught Range Cooker Separated conservatory with fixed heater Unknown Unknown ease kw 0 0000 Dwelling in smoke control area Open Natural No Yes Don t know Room sealed Awater kw 0 0000 Fanned flue Fanned Figure 22 2 Configuri
44. Edit gt Construction type The U value Construction dia logue opens Use the drop down to select the Layer bridged by mechanical fasteners In the Correction for mechanical fasteners section either use the drop down to select one of the standard fastener types or enter the individual items of data for the fasteners To view the default values click the Help button Where the fastener is recessed enter the length of the fastener that penetrates the insulation layer in mm CHAPTER 8 CORRECTION FACTORS 37 Figure 8 2 Correcting for air gaps in insulation layers ir gap correction delta U 0 00 Wink P Help 8 2 Air gap correction Air movement through and around an insulation layer will reduce its thermal perfor mance The effect of that reduction is included in the U value calculation by a correction factor dUg which is derived from the relative thermal resistances of the insulation layer and the construction as a whole and from a coefficient dU which represents the size of gaps in the insulation layer Values for dU e Where no air gaps penetrate the insulation layer and no air circulation is possible on its warm side dU 0 00 W m K e Where some air gaps penetrate the insulation layer and no air circulation is possible on its warm side dU 0 01 W m K e Where some air gaps penetrate the insulation layer and some air circulation is pos sible on its warm side dU 0 04 W m K A value for dU mu
45. Element type section to select the type of floor wall or roof For some elements there are options for entering additional information The available element types are e Flat roof A roof with a pitch typically less than 15 There is an option to enter data for an inverted roof section 9 3 21 CHAPTER 5 CONSTRUCTION DETAILS 22 Figure 5 1 The U value Construction dialogue U value Construction ant mn Element Type External Surface Flat roof High Emissivity Low Emissivity Surface Resistance m K W 0 04 Internal Surface High Emissivity Low Emissivity Surface Resistance m K W 0 13 Light steel frame Construction Type BRE Digest 465 Pitch roof horizontal ceiling Floor other than ground floor Nota light steel frame Construction Solid ground floor Warm Frame Pitch roof ceiling at rafter line Suspended ground floor Cold Hybrid Wall Basement Floor Rainscreen cladding Basement Wall Element description Built up metal roof wall cladding using rail amp bracket spacer SCI P312 Built up metal roof wall Layer bridged by mechanical fasteners X Mechanical fasteners Et New Lambda of Alph T JmK No per ff Cross mm pha o0 m istenes 000 W de ooo off Toes 0 000 Recess 0 0 mm 2 Help Elements separating heated and small unheated spaces see ISO 6946 sec 5 4 Area of all components between unheated space amp outside Ae ox Lens Area of all components between inside amp unhea
46. FRC data 0 72 glazing type single double or triple so make sure you select the correct glazing Description w13 Opening Orientation oat Window aize v Width mm 1200 Height mm 1200 Left front Overhang used for 3 cii Right front overheating assessment idth mm 1200 Depth mm 0 Blinds curtains amp external shutters Left Right None a aeon E 0 00 Overshading Leftback Right back Heavy gt 80 sky blocked More than average 60 80 sky blocked NorthWest Back Average or unknown 20 60 sky blocked Unspecified Very little lt 20 sky blocked Copy these values to all this buildings windows Copy these values to all the building s in this project x Cancel e Frame type Use the radio buttons to select the frame material and for metal frames the depth of the thermal break e Source of U value If you select Default the software will use the built in values for the U value and solar transmittance If you select Manufacturer the software will expect you to enter a U value but will use a default solar transmittance based on the glazing and frame type If you select BFRC data the software will expect you to enter a U value and solar factor g window value The g window value must be certified by the British Fenestration Rating Council e U value If source of U value is set to Default this box will be greyed out Otherwise enter the manufacturer supplied U value e g window va
47. Floor other than ground floor rainwater cooling it is best to add the correction factor after you have defined the layers in the construction To enter an inverted roof 1 From the file menu select Edit gt Construction type The U value Construction dia logue opens In Element type select Flat roof Insert an Element description then click OK Add the layers of the construction chapter 6 Open the U value construction dialogue again and in Element Type tick the In verted box The dialogue shows three data boxes Figure 9 4 Enter the values for f x and p and in the box select the layers of insulation above the waterproof membrane Click OK 9 4 Using variable layers The variable layer feature of JPA Designer helps you assess the effect of using different materials in the same place within an element for example by using a variable layer you could compare the effect of different insulants on the U value of a cavity wall A calculation with a variable layer has a place holder layer in the main window and has the additional Variable layer pane which accepts a number of different layers Each of those layers shows the results of the U value calculation as if that layer replaced the place holder layer in the main calculation To use a variable layer 1 2 In the main U value window click the layer below the position for the variable layer From the menu bar select Insert gt Variable layer The program ins
48. IONS 41 Figure 9 2 Built up metal wall or roof cladding Built up metal roof wall cladding using rail amp bracket spacer SCI P312 Built up metal roof waill Rail spacing mm 1200 0 insulation is compressed by inner or outer sheet Rail width mm 40 0 Layer bridged by rail 1 Identify the element as light steel framed and enter the framing details Figure 9 1 In the Uvalue Construction dialogue use the light steel frame radio buttons to define is as warm or cold hybrid If you select Cold Hybrid enter the stud spacing stud depth and flange width Use the offered default values if you do not know the stud depth and spacing 2 Enter the layers of the construction in the main Uvalue window For cold hybrid elements some of the layers will be bridged for guid ance on entering bridged layers In warm elements the air space between the studs should be entered as a bridged cavity with steel as the bridging material In cold hybrid elements the insulation layer will be bridged by steel Any airspace behind the insulation and between the studs should be entered as a bridged cavity Do not include the flanges of the steel studs when entering bridging details 3 Enter corrections for any mechanical fasteners which penetrate the insulation by completing the Correction for mechanical fasteners section in the Uvalue Con struction dialogue section 8 1 Use the first drop box to indicate which layer is bridged by the mechan
49. JPA Designer User Manual JPA TL Ltd January 20 2011 Contents I JPA Designer basics 1 Introducing JPA Designer 1 1 JPA Designer modules Getting started 2 1 System requirements 2 4 On line licence checking 5 Updates N 2 7 Uninstalling JPA Designer 3 Managing projects and calculations 3 1 Starting a new project 3 2 Adding project address details 3 5 Adding calculations to a project 3 7 Duplicating calculations 3 8 Renaming calculations 3 9 Deleting calculations 4 1 Uvalue project information 1 2 Getting help gt oa lt 4 a lt 8 wees 2 2 Installation 02 2 3 User registration 2 6 Opening and closing JPA Designer 3 3 Saving projects 3 4 Opening projects 3 6 Opening and closing calculations 3 10 Merging projects 3 11 Importing and upgrading calculations 3 12 Program Options 64 4 WwW UN OMON DU UW UI 18 19 20 CONTENTS 5 Construction details 5 1 Element type 0 0 0 000 5 2 Internal and external surfaces 5 3 Light steel frame construction type 5 4 Built up metal roofing and cladding systems 6 Working with layers 6 1 Inserting layers from the Products database 6 2 Inserting blank layers in acalculation 6 3 Cutting copying pasting and deleting layers 7 Working with materials
50. S database FGHRS Database Ea Manufacturer Alpha v Database revision 302 Available Ref DB Entry Date Manufacturer id Manufacturer 60021 2010 Apr 06 12 05 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 50 PV1 2008 a 60020 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 PV1 2008 a 60019 2010 Apr 06 12 05 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 PV1 2008 a 60014 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 50 2008 a 60013 2010 Apr 06 12 05 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 50 2008 cl 60012 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 2008 a 60011 2010 Apr 06 12 04 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 2008 a 4 gt Lox cancel e Enter the total rooms with shower and or bath e For each system specify the number of mixer showers to which the system is linked in rooms with a bath and without a bath WWARR systems attached to instantaneous electric showers IES are not included in the assessment Therefore IES should not be counted in the number of showers for a system but should be counted in the total rooms with shower and or bath 26 5 Flue gas heat recovery systems Flue gas heat recovery systems FGHRS recover heat from the combustion products of condensing boilers to pre heat the domestic hot water supply To specify FGHRS 1 Tick FGHRS and click the Lookup
51. Ss os 0 6 Open flues os 09 86 0 6 Flueless gas fies 0 Sheltered sides 2 0 Ventilation Type Natural ventilation with intermittent extract fans Natural ventilation with passive stack ventilators Balanced whole house mechanical ventilation without heat recovery Balanced whole house mechanical ventilation with heat recovery Positive input ventilation from outside Positive input ventilation from loft Mechanical whole house extract ventilation Decentralised mechanical whole house extract ventilation Approved installation scheme Source of mechanical ventilation parameters Default User defined Enter details of windows amp doors draught stripped 100 0 Database Lookup Enter 100 for new dwellings which are to comply with the Building Regulations 86 CHAPTER 18 VENTILATION 87 18 1 Air infiltration Air infiltration represents unplanned air movement higher levels of air infiltration will give higher DER values The rate of air infiltration is expressed in terms of the volume of air which passes in one hour through a square metre of the surface of the building envelope m hm the measure is often referred to as the g50 value after the calculation result in BS EN 13829 The DER calculation does not require any specific value for air infiltration but Part L imposes upper compliance limit of 10 m hm for all dwellings which will be checked by pressure testing Design stage calculations have to be revise
52. T column displays the values If you wish to vary the internal temperature throughout the year you can type values directly into the Int T column for each month 4 From the Building location dropdown select the location of the building The Ext T and Ext RH columns are completed and the values in the Int RH column adjusted If you have site specific data you can type values directly into the table 5 Click OK to accept the data and close the dialogue 15 2 Viewing results JPA Designer presents the results of condensation risk analysis in three formats e As month by month data in the ISO Condensation Table subsection 15 2 1 e As a graph in the Dewpoint graph subsection 15 2 2 e In summary form in the Results table subsection 15 2 3 4The data is taken from Meteorological data 1961 1990 published by the World Meteorological Office CHAPTER 15 ASSESSING THE RISK OF INTERSTITIAL CONDENSATION 68 Table 15 1 Humidity classes Class Building type Relative humidity 15 C 20 C 25 C 1 Storage areas lt 50 lt 35 lt 25 2 Offices shops 50 65 35 50 25 35 3 Dwellings with low occupancy 65 80 50 60 35 45 4 Dwellings with high occupancy sports halls 80 95 60 70 45 55 5 Special buildings e g laundry swimming pool gt 95 gt 70 gt 55 Figure 15 1 ISO 13788 Condensation table pe Iso Condensation Table o amp E Click on an interface to view the build up figures Aluminium Rockwool Cladding Roll R
53. The value is used in conjunction with the window orientation data to determine solar gain For a house it is usually easiest to treat the elevation containing the front door as the front face for an block of flats it may be better to treat the front of the block as the front face for all flats rather than setting different front orientations for each flat e Application date Enter the date on which the dwelling will be submitted to the Building Control Body Clicking the down arrow will open a calendar 17 1 Low energy lighting The proportion of low energy lighting is used in the calculation of electricity consumption for lighting with a higher proportion of low energy lighting resulting in lower electricity use and a lower DER The proportion of low energy lighting is also used to test compliance with the minimum efficiency standards for fixed building services criterion 2 in Approved Document L1A the Domestic Building Services Compliance Guide requires a minimum of 3 out of 4 0 75 light fittings to be low energy Further information on lighting is given in chapter 12 of the Domestic Building Services Compliance Guide The data required to determine the proportion of low energy lighting is CHAPTER 17 DWELLING DIMENSIONS 85 e the total number of lighting units which is entered in Total fixed lighting outlets e the number of low energy fixed lighting units which is entered in Low energy lighting units Once you have entere
54. alculation after the program itself has been launched e If the check is successful the licence is valid the module will open the program will record the date and time of that successful check e If the check is successful and the licence is not valid the calculation will not open e If the program is unable to connect with the database for example because you are using your lap top away from your office it will look at the date of the last successful check if that is less than seven days ago then it will open the module e If the program is unable to connect with the database and the last successful check is more than seven days ago then it will not open the module If you often use JPA Designer away from the office there are two features you can use to prevent problems with the licence check e The Project Manager tool bar displays the length of time since the last successful licence check provided the values shown are green the module will open e The Check licence on line button on the tool bar will force a licence check and re set the time since the last check to zero You should force a check if you expect not to have an internet connection for a few days CHAPTER 2 GETTING STARTED 8 Figure 2 3 The About dialogue showing the version number Download JPA Designer Version 4 04b1 build 017 JPA Designer Version 4 04b1 Build 017 SAP Version 9 80 9 81 amp 9 90 Silverleaf Software Ltd Copyright JP
55. ank data boxes e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 e Heat pump heat exchanger area Enter the area of the heat exchanger plates in m If the dwelling has solar panels complete the Solar panel section of the Water heating tab section 21 10 CHAPTER 21 WATER HEATING 115 Figure 21 7 Settings for a community heating scheme which supplies only domestic hot water Source of domestic hot water Community heating scheme domestic hot water only Hot water only community heating Heat Source Boilers Fuel Heat from boilers mains gas Hee B New Edit it Delete sources Charging Charging linked to use Y Distribution Piping gt 1991 pre insulated medium temp variable flow Y Hot water tank heater Single electric immersion heater Dual electric immersion heater Boiler feed From 2nd main heating system Summer immersion heater Hot water only boiler Fuel M Cylinder in heated space Cylinder thermostat Override heat pump database values DHW cylinder within dwelling DHW vessel within micro CHP 21 9 Community heating scheme pro
56. ary heating Fuel Figure 23 1 The Secondary heating tab Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Group Room heater systems Zi Sub group Solid fuel x System Closed room heater 633 v Fuel Solid fuel room heater is HETAS approved Use manufacturer s declared efficiency Make Morso Model Badger Declared efficiency 92 BS Test Method BS EN 13229 126 CHAPTER 23 SECONDARY HEATING 127 If the solid fuel room heater has been approved by HETAS tick the box The calculation will then use a higher default efficiency for the heater Where the actual efficiency for a solid fuel heater is known tick the Use manufacturer s declared efficiency box then enter the Make Model and Declared efficiency The BS Test Method used to obtain the efficiency value should also be entered Heating Equipment Testing and Approval Scheme 24 Overheating Dwellings must not have an excessive risk of high internal temperatures in summer as a result of solar gain The test for overheating risk is set out in Appendix P of the SAP doc ument overheating risk depends on the predicted amount of solar gain and the thermal mass of the dwelling The result of the overheating assessment is shown in the main SAP window a dwelling with a high risk of overheating will not comply with regulations Most of the da
57. as warm air system This represents systems with one gas fired water heater providing hot water to a number of outlets or a water heater which uses a heat exchanger built into a warm air heating system Enter the following data CHAPTER 21 WATER HEATING 111 Figure 21 4 Data entry for gas water heaters or heat exchangers Source of domestic hot water Multi point gas water heater or heat exchange built into a gas warm air system Hot water tank Storage tank insulation Volume I 210 0 X Factory Thickness mm Declared loss factor if Jacket 50 00 known kW h day Heat pump heat exchanger area 0 00 e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 Use the four lower boxes to indicate whether e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e the primary pipework between the boiler and tank is insulated tick box only dis played if boiler feed is selected required by Domestic Building Services Compli ance Guide e there is a separate timer for the domestic hot wa
58. ate construction that will also set the U value For a party wall between a dwelling and an occupancy which is not a dwelling ignore this box e Storey this box is only displayed if the Element is a party floor or internal floor Set the storey number relative to the building not just the dwelling e When Element is set to internal floors the program displays the Ceiling below drop down select the internal ceiling which forms the other part of the internal floor construction This means you should enter the internal ceiling elements before you enter the in ternal floors e Heat capacity enter the heat capacity value for the element if you have se lected a Construction its default heat capacity will already be entered e Area Enter the area of the element If you have chosen to use gross areas the text above the Area box will read Enter areas INcluding doors windows rooflights If it reads EXcluding doors windows rooflights you must enter net areas e U value Enter the U value in the text box If you have already carried out the U value calculation in the same JPA Designer project you can select it using the Link to this U value calculation drop down that creates a permanent link between the element in the SAP calculation and the U value calculation the software will update the SAP calculation if the U value changes CHAPTER 19 WALLS ROOFS AND FLOORS 96 e Effective thermal resistance of unheated space Ru T
59. ce this is the value The program will offer standard values based on the junction type 5 Enter the Detail length the total length of the junction in metres 6 Set the Source of value Currently this simply records the source in the future it will be used to trigger the penalty on calculated but non accredited details 7 Click OK The junction is added to the Calculate Htb dialogue There are two additional points to note when adding junctions e there is a distinction between junctions to exposed walls and junctions to party walls the latter commonly have lower values e if the dwelling has curtain walling there is no need to include the lengths of the window surrounds as the thermal bridging heat losses will have been included in the overall U value for the curtain wall system Accredited construction details for England and Wales are available on the Planning Por tal http Avww planningportal gov uk Those for Scotland from the Scottish Government web site http www scotland gov uk Topics Built Environment 19 4 2 Simplified Htb calculations An approximate value for Htb can be obtained by multiplying the total area of the exposed elements floors walls and roofs by a factor y There are two conditions where this simplified method may be used e Where y has been calculated for that type and configuration of dwelling To use a calculated value for y 1 Tick Enter y value manually 2 Enter the value for y in the b
60. ces e Click the New button the Heat source dialogue opens Figure 22 5 e Select the type of heat source from the Heat source drop down e Select the Fuel from the drop down e Set the proportion of the total heat load provided by that source enter a fraction between 0 and 1 in the Heat fraction box The total heat fraction from all the heat sources must total 1 00 Some of the options will not be appropriate for new build but are included for compatibility with the Reduced data SAP RdSAP used for EPCs for existing dwellings CHAPTER 22 PRIMARY HEATING 125 e Enter the percentage Efficiency of the heat source For most sources the efficiency will be less than 100 but for may be considerably higher e Click OK to close the dialogue e Repeat the procedure for multiple heat sources use the Edit and Delete buttons to adjust or remove heat sources To set the controls and distribution system e Set the Heating controls and the Electricity tariff Systems which rely on flat rate charging will usually be less efficient than those where charging is linked to use e Use the Heat distribution system drop box to specify the type of pipes used to circulate the hot water 22 3 7 Electric underfloor heating This option reqpresents underfloor heating systems based on electric cables in the floor slab or integrated into flooring The only data required is that from the primary heating drop boxes 22 4 Additional data
61. ck boxes to select the outputs you want to produce 4 Click OK The Print preview window opens 5 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 The program will then create a PDF file of the calculation The name of the PDF file will include the JPA Designer file name and the calcu lation name so the calculation Plot 28 in a project The Meadows will be called The Meadows JDPtile hung wall Plot 28 PDF The file will be saved into the JPA Designer program folder or in the start up folder you have specified Note as Windows does not allow certain characters to be used in file names you should ensure the calculation names in JPA Designer do not contain those charac ters otherwise PDF creation will fail The restricted characters are lt gt You can change the printer settings by selecting File gt Printer setup from the menu bar
62. covery technologies including e photovoltaic panels section 26 1 e wind turbines linked to one dwelling section 26 2 e hydro electric generators section 26 3 e waste water heat recovery units WWHRS section 26 4 e flue gas heat recovery systems FGHRS section 26 5 The data for all those systems is entered in the Photovoltaics and Alternative Technologies tab abbreviated to PV amp Alt Tech Figure 26 1 That tab is also used for entering the amount of any additional energy generated by other means section 26 6 26 1 Photovoltaic panels Photovoltaic panels generate electricity from sunlight JPA Designer enables you to in clude two photovoltaic installations to allow for situations where panels are set at two different orientations For each installation 1 Enter the Peak kW of the system obtain this value from the manufacturer or sup plier 2 Select the Pitch of the panels 3 Select the Direction which the panels face 4 Select the amount of Overshading which may not be the same as the overshading of the windows For blocks of flats where the PV output is connected into the landlord supply the total PV area should be divided between the dwellings in proportion to their total floor areas If the PV output is connected directly to individual flats then the whole PV area should be allocated to those flats Electricity generated by a wind turbine attached to the dwelling or on a mast within i
63. d tick box only dis played if boiler feed is selected required by Domestic Building Services Compli ance Guide e there is a separate timer for the domestic hot water If the dwelling has solar panels complete the Solar panel details section of the Water heating tab section 21 10 21 2 Instantaneous water heating at point of use For a system which heats the water on demand at the point of use you need only select the Fuel using the radio buttons 21 3 Combination boiler Combination boilers provide heating and hot water they may be instantaneous with up to 15 litres storage or they may contain small primary or secondary storage tanks see Appendix B of the SAP 2009 document for definitions Use the Combination boiler type radio buttons to select the type If you have selected Instantaneous there is no further data to enter For a boiler with a primary or secondary store enter the following data e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down CHAPTER 21 WATER HEATING 110 Figure 21 3 Hot water options for combination boilers Source of domestic hot water Combination boiler Hot water tank Storage tank insulation Combination boiler type Volume I 210 0 v Factory Thickness mm Instantaneous Declared loss factor if Jacket 50 00 Storage with a primary store known k Wh day Storage with secondary store e Storage tank insulation use the radio
64. d company name and using the radio buttons select whether you want JPA Designer to be available to all user accounts on the computer or just one We recommend you select all Click Next 5 CHAPTER 2 GETTING STARTED 6 Figure 2 1 The Project Manager window 7 JPA Designer psf Home Desktop PC Swap end of terrace JDP ms Sm File Edit Insert Options EPC Help fay JE Fi EA R a allot ni aia Od 22h 2m 28s 3 blank project Building 3 SAP 9 90 Dwelling End of terrace End of terrace with microCHP 6 At the Choose Destination Location screen we recommend you accept the default settings and install JPA Designer into the folder c program files jpatl jpa designer 981 Click Next The installer will now copy the JPA Designer files onto your computer 7 When installation has finished the Setup Complete screen is displayed Tick the box labelled Launch the program and click Finish The installer will close and JPA Designer will open showing you the Project Manager window 2 3 User registration In order to use JPA Designer you must enter valid user registration details and the program must be able to check the status of your licence against our licensing database When you first install JPA Designer the program runs in demonstration mode and will not display the results of calculations nor allow EPCs to be lodged In order to access the full functionality of the software you must enter
65. d that data the program will calculate and display the Fraction of low energy lighting At the design stage when it is unlikely that the exact number of lighting units will be known the simplest strategy is to set the total number of units to 10 or 20 then set the number of low energy units to give the correct proportion 15 out of 20 will give a proportion of 0 75 This change in the way the fraction of low energy lighting is entered has resulted from a change made to the data submission which accompanies the EPC which means it is no longer sufficient simply to enter the fraction 18 Ventilation The movement of air from the inside to the outside of the dwelling will result in heat loss SAP considers two components of air movement e Air infiltration through the building fabric e Ventilation Data for air movement is entered using the Ventilation tab Figure 18 1 which has sec tions for air infiltration and ventilation strategy Figure 18 1 The Ventilation tab Dimensions Ventilation walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Source of q50 value Pressurisation Test Result Pressure Test Assumed Calculated not suitable for Building Design q50 m m h 7 0 as built as designed Regulations compliance This dwelling has been pressure tested Ventilation E main secondary other heating heating Chimneys o
66. d using the actual infiltration rate once testing has been carried out The only exception to that regime is for developments of one or two dwellings where an air pressure test is not required so long as the DER is calculated using an air infiltration rate of 15m hm That presumed rate of air infiltration will give a higher DER which must then be reduced by compensating improvements to the building fabric or services There are three methods to enter the air infiltration data into the software e Set a design test pressure and replace it later by the result of the pressure test e On small developments use an assumed value of 15 m hm e Allow the software to calculate the infiltration rate from the construction type and building size This method is not valid for demonstrating compliance under building regulations 18 1 1 Pressure test data The treatment of a dwelling subject to the air pressure testing regime depends on whether a pressure test is carried out on the dwelling or whether it is part of a group of dwellings in which other dwellings are tested At the pre construction stage the design pressure test value should be used for all dwellings but the final calculation e for dwellings which are pressure tested the pressure test result e for dwellings which are not themselves pressure tested the average test result for dwellings of that type plus two To use air pressure test data 1 At Source of q50 value select P
67. de Efficiency Utilisati 80001 20044 Hei tech b v Shower Save Recoh tray RT1 current 46 90 0 98 Heitech bv StonersaveRechver RV2 larrent_ 61 20 1098 4 Select as system 1 Select as system 2 Total rooms with shower and or bath 4 System 1 Hei tech b v Shower Save Recoh tray 46 90 0 98 Number of mixer showers in rooms with a bath 1 5 Number of mixer showers in rooms withouta bath 1 5 System 2 Hei tech b v Shower Save Recoh vert 61 20 0 98 Number of mixer showers in rooms with a bath 1 Number of mixer showers in rooms without a bath 1 26 4 Waste water heat recovery systems Waste water heat recovery systems WWHRS use heat exchangers to recover heat from the heated water passing out of the wastes of showers and baths and to feed it back into the hot water system pre heating the cold water feed to the boiler or hot water cylinder The effectiveness of the WWHRS depends on the system and on the proportion of baths and showers to which it is linked To specify WWHRS in JPA Designer e In the PV amp Alt Tech tab tick WWHRS and click the Lookup button The WWHR Database dialogue opens Figure 26 2 e Use the Manufacturer drop down to select the manufacturer then highlight the specified product in the list and click Select as system 1 Repeat this process if there is a second system but click Select as system 2 CHAPTER 26 RENEWABLES 133 Figure 26 3 The flue gas heat recovery systems FGHR
68. domestic hot water e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 The hot water tank heater will always be Boiler feed Use the radio buttons and tick boxes to indicate whether The thermal store is in an airing cupboard The thermal store is close coupled The thermal store is integrated or hot water only Close coupled means the store is either within the same casing as the boiler or separated from the boiler by no more than 1 5m of insulated pipework There is a separate timer to the thermal store for the heating store Use the four lower tick boxes to indicate whether Services Compliance Guide the hot water tank cylinder is in the heated space there is a thermostat in the hot water tank cylinder required by Domestic Building the primary pipework between the boiler and tank is insulated tick box only dis played if boiler feed is selected required by Domestic Building Services Compli ance Guide there is a separate timer for the domestic hot water If the dwelling has solar panels complete the Solar panel section of the Water heating tab see section 21 10 CHAPTER 21 WATER HEATING 113 Figure 21 6 Data entry for CPSU hot water supply Source of domestic hot water Combined primary storage unit CPSU Hot water tank Storage tank insulation Hot water tank heater Thickness mm Single
69. e Compressor control Cooled fraction enter 0 if there is no cooling 0 0000 Split or multi split Onoff Energy label class aes Packaged Modulating User defined Energy Efficiency Ratio EER 0 00 128 25 Cooling The energy used for space cooling must be included in the SAP 2009 calculation when ever space cooling is present The data for the system is entered in the Overheating amp cooling tab Figure 25 1 The Cooling fraction the proportion of the dwelling which is served by the cooling system This can be determined by dividing the floor area of the cooled part by the total floor area The efficiency of the system can either be set to default values by setting e System type The system can be Split or multi split or Packaged e Compressor control This can be set to On off or Modulating e Energy label class Select A to G with ND for no data Where the Energy Efficiency Rating EER is known tick the User defined Energy Effi ciency Ratio and enter the value in the EER box Figure 25 1 Settings for air conditioning systems vJ Dwelling has fixed air conditioning system Cooling System type Compressor control Cooled fraction enter 0 if there is no cooling 0 0000 Split or multi split On ott Energy label class A a Packaged Modulating User defined Energy Efficiency Ratio EER 0 00 129 26 Renewables SAP 2009 takes account of the contribution of certain renewable sources of energy and some heat re
70. e Project Manager window and open it for editing Figure 11 1 Entering data for basement floors Ground Floor Details s Basement floor dimensions Basement Details for ISO 13370 P A 0 40000 Calculate it 7 him 24 wm 0 300 Perimeter rm 40 Area m 100 lambda 1 500 Default 54 CHAPTER 11 BASEMENT U VALUES 55 2 In the U value Construction dialogue set the Element Type to Basement Floor enter an Element description then click OK The Ground Floor Details dialogue opens Figure 11 1 3 Enter the Perimeter Area ratio P A or check the box labelled calculate it and enter the Perimeter and Area separately 4 Enter the wall thickness w the basement depth h and the thermal conductivity of the ground lambda Click OK 5 Enter the layers which make up the floor construction Include layers to represent e Screed e Insulation e Flooring such as particle board Omit any layers which consist of e Hardcore beneath a groundbearing slab e Groundbearing concrete slabs with density greater than 1800 kg m e Thin floor coverings such as vinyl or carpet Table 11 1 Thermal conductivity of the ground Category Description Thermal conductivity W mk 1 clay or silt 15 2 sand or gravel 2 0 3 homogeneous rock 3 5 11 2 Basement walls To complete a basement wall U value calculation you will need to know e The floor s Perimeter Area ratio P A e The thickness of the basement walls w metres
71. e data for the minimum thickness and the conductivity of the insulation 4 Enter the data for each block in turn making sure each block goes into the appro priate table You can use the Total area figure at the bottom right of the dialogue to check you have entered all the sections of the roof CHAPTER 9 COMPLEX CALCULATIONS 47 Figure 9 6 A typical roof with tapered insulation 3 0m 6 0m 3 0m lt lt O 8m 12m CHAPTER 9 COMPLEX CALCULATIONS 48 Figure 9 7 The Tapered areas dialogue Tapered Areas iption Tapered Insulation Minimum tapered layer 0 Description Taper cea l lambda 0 036 W m K Description optional a e Taper thickness t Area mm m3 100 24 100 24 Triangular area thinnest at apex waarmee Ga Total area 96 00m 10 Ground floor U values As the combined method deals with heat loss from air to air through an element it has to be modified for ground floors to include the thermal resistance of the ground itself JPA Designer calculates U values for ground floors using the method is set out in ISO 13370 This section describes the general procedure for calculating the ground floor U value whilst the following sections describe the individual parts of the calculation To calculate a ground floor U value 1 Create anew U value calculation in the Project Manager window and open it for editing section 3 5 2 Enter any project inf
72. e dialogue opens 3 Use the scroll bar on the Categories box to find the manufacturer or type of material you need then click once on that category The Products box shows the material in that category 4 Click on a material to select it then click the Add to construction button alterna tively you can double click on the material in the Products box The Thickness dialogue opens CHAPTER 6 WORKING WITH LAYERS 26 If the material has a set thickness the layer will be added without the Thickness dialogue opening 5 Enter the thickness of the layer then click OK The Construction box now shows the new layer 6 You can now add more layers from the database using the Construction box to control the position of the new layers 7 When you have finished adding layers click the Close button The main Uvalue window now shows the calculation with the new layers added If you are not sure which category a particular material belongs to you can use the Search button to find it You can use the Only show My database box to make the software only show categories which you have added If you have assigned short codes to materials you can view database items sorted ac cording to the short code by clicking the sort by short code check box in the Products Database dialogue You can use short codes to select materials by entering a code in the Short Code text box then clicking the Add to construction button however the short code system is
73. e rainwater cooling it is best to add the correction factor after you have defined the layers in the construction To enter rainwater cooling data 1 From the menu bar select Edit gt Construction Type 2 In the Element type section select Flat roof 3 Tick the Inverted roof box New data entry boxes appear 4 In the External insulation layers box tick the layer s is affected by the rainwater cooling Where a low U value is required there may be more than one insulation layer af fected 5 Enter values for f x and p Click OK If you do not have project specific values you can use the default values for f x and p 8 4 Rainscreen cladding When calculating U values for walls which include rainscreen cladding the results have to be adjusted to account for the effect of any metal fixings which penetrate the insulation JPA Designer can correct for the effect of point fixings using method c in section 4 9 5 of BR 443 Conventions for U value calculations The calculation requires the point thermal transmittance of the fixing x and the number of fixings per square metre n As x depends on the type of fixing you must get the correct value from the fixing manufacturer The data is entered in the U value Construction dialogue To correct for brackets in rainscreen cladding 1 From the menu bar select Edit gt Construction Type The U value Construction dia logue opens 2 In the Element type section select Wall 3 Tick the
74. e same as the rail depth The width should be twice the rail thickness Click OK to close the dialogue transfer the results to the bridging calculation Enter the air gap correction dU for both insulation layers section 8 2 use the value 0 01 Click OK From the menu bar select Edit gt Construction Type The Uvalue Construction dia logue opens CHAPTER 9 COMPLEX CALCULATIONS 43 Figure 9 3 The Small Airspace Resistance Calculator Small Airspace Resistance Calculator nese See EN ISO 6946 Annex B for more details Airspace thickness in 50 direction of heatflow d Airspace width b mm 120 Airspace resistance m2K W Ca coe 12 Tick the Built up metal roof wall box The dialogue now displays the Built up metal roof wall cladding section 13 Enter the Rail spacing and Rail width Figure 9 2 Use the drop down to indicate which layer is bridged by the rail liner details 14 If the liner profile compresses the insulation and the depth of the profile is 25 mm or less tick the box Insulation is compressed by inner or outer sheet Four new data boxes appear 15 Enter the Sheet profile width Sheet profile depth and Sheet profile centres in mm In the drop box select the layer of insulation which is not bridged by the rails If the liner profile is deeper than 25 mm ignore the check box and change the thickness of the insulation layer by subtracting the profile depth from the original thickness e g for a
75. e useful 1 Click once on the project name then select Edit gt Rename selected item The Project name dialogue opens Figure 3 1 2 Enter the new name for your project then click OK 3 The project is renamed The project name does not affect the calculations in any way Figure 3 1 Changing the name of a project Project Name Enter a name for this Project Brownfield Mews Cancel a 10 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 11 Figure 3 2 The Project Address dialogue Client name amp address Project address Brownfield Mews MrR T Builder 8 8 Tawnyville The Old Yard Suedeshire Tawnyville Suedeshire Post Code BN13 4TY Post Code BN123DR Phone 31234 567 890 Fax 11234 567 891 Email bob thebuilder co uk Add to clients Edit clients list Reference certificate Date 3 2 Adding project address details JPA Designer can store client and site details for a project which you can then copy to all the individual calculations within that project You can enter and edit that information using the Project Address dialogue Figure 3 2 You can also store client information and reuse it later To add or change project information 1 From the menu bar select Edit gt Project Address The Project Address dialogue opens 2 Enter the data by typing it into the appropriate fields Use the lt Tab gt key to move between fields Do not try to enter data in the top left hand b
76. egories in italics pe coer tie information on adding your own materials 24 CHAPTER 6 WORKING WITH LAYERS 25 Figure 6 1 The Products Database window Products Database A i ote Categories Products Renotherm a Asbestos cement sheeting amp substitutes BS5250 Rockwool are i ecking Plywo SERN Fibreboard B55250 Brickwork Foamed glass 855250 Cavities Hardboard BS5250 Medium po Fibreboard Seed Plasterboard BS5250 or PVC rigid sheet pii Flooring Waferboard Insulation loose Woodwool slabs Insulation slab Membranes Enter the product thickness in mm Only show My database Sort on short co 12 5 Short Code Next La Search Add to constuction J A Edit database Construction Outside surface resistance Brick outer leaf BRE Cavity gt 25mm wall CIBS Polyisocyanurate BSS250 Blockwork medium Exposed 1400kg m 440 x 215mm Plaster Dabs Cavi Inside surface resistance TL cose e The Products box which you use to select a material from a particular category e The Construction box which shows the order of layers in the construction To insert layers using the Products Database 1 Select the existing layer which will be below the new layer 2 From the menu bar select Insert gt Layer from database or click the Database button on the toolbar The Products Databas
77. egory it Delete product k New product 1 Select the category to clone by clicking on it 2 Click the Clone category button The Clone category dialogue opens 3 Enter a name for the new category and click OK 4 Anew category will be created containing copies of the original materials To delete a user defined category 1 Select the category to delete 2 Click the Delete category button An Information dialogue asks you to confirm the deletion 3 Click Yes to delete the category No to keep it To insert a new material in a user defined category 1 Select the category in which you want to create the new material 2 Click the New product button The Edit material dialogue opens 3 Complete the Edit material dialogue chapter 7 4 Click OK The new product is added to the category CHAPTER 14 EDITING THE PRODUCTS DATABASE 63 Figure 14 2 The Search Database dialogue F Search Database Search for Direction Forward Back 4 Ignore case Finds Find nest if Close To edit an existing user defined material 1 Select the product you wish to edit 2 Click the Edit product button The Edit material dialogue opens 3 Make the changes in the Edit material dialogue chapter 7 4 Click OK The product information is updated To clone an existing product in a user defined category 1 Select the product and click the Clone product button A copy of the product wil
78. elect Edit gt Selected item To close a calculation and return to the Project manager window click the Project man ager button on the tool bar 3 7 Duplicating calculations If you want to prepare a calculation which is very similar to an existing calculation in a project you can duplicate the calculation and then make your changes to the copy without affecting the original calculation To duplicate a calculation 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Duplicate item The Description dialogue opens 3 Type a name for the duplicate calculation and click OK A copy of the original calculation is added to the project You can now work with the duplicate calculation in the usual way CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 14 3 8 Renaming calculations To change the name of a calculation 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Rename selected item The Name dialogue opens For a U value calculation the dialogue will the titled U value Name and for a SAP calculation it will be titled SAP name 3 Enter a new name for the calculation and click OK The Project Manager window shows the new name Changing the name of the calculation will not affect the calculation results 3 9 Deleting calculations Calculations can be deleted from JPA Designer projects WARNING there is no wa
79. electric immersion heater Volume I 210 0 X Factory z Na Declared loss factor if Jacket ee aa ah ak ita known kWh day oiler feed Heese oe Heat pump heat aia Sverre dues exchanger area 0 00 Hot water only boiler CPSU Thermal store in airing cupboard Yes No Fuel v CPS d wirker evel temperature bate ANES Thermal store or CPSU has seperate timer for heating store 85 C 90 C 95 C 270 litres 300 litres 330 lites Cylinder in heated space Other C 85 Other litres 210 0 J Cylinder thermostat Override heat pump database values DHW vessel within micro CHP 4 Insulated primary v Separate timer for domestic hot water 21 7 Combined primary storage unit CPSU A Combined Primary Storage Unit provides hot water by means of heat exchanger within the primary store Enter the following data for the tank e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 Use the radio buttons and drop downs to indicate e whether the CPSU is in an airing cupboard e the winter operating temperature of the CPSU e the size of the CPSU cylinder Use the lower boxes to indicate whether
80. er and area The perimeter length expressed in metres is measured along the finished in ternal surfaces of exposed and semiexposed walls The area expressed in square metres m is measured between the finished internal wall surfaces Unheated spaces outside the insulated fabric should be excluded when calculating the perimeter and area If you are calculating the ground floor U value for flats in a block or for a house in a terrace you can use the perimeter and area for the whole block or terrace instead of the dimensions of the individual occupancies To enter the Floor dimensions e If you have calculated the Perimeter Area ratio you can enter it directly in the P A box e Alternatively tick the Calculate it box and enter the values in the Perimeter and Area boxes for you to fill in 10 1 3 Deck The data required for this section depends upon the type of construction specified in the Floor Type section of the Ground Floor Details dialogue e Solid floor no deck data required e Suspended block and beam floor the program offers a default thermal resistance for the deck of 0 2 m K W Alternatively the program can also calculate the resistance using the specific details for your floor if you tick the Calculate box then input data for e The blocks Width Thickness and Conductivity e The beams Web width and Beam conductivity e The screed Screed depth and Screed conductivity e Suspended floor the program offers a defau
81. erts a variable layer in the calculation and displays the Variable layer pane see Figure 9 5 Select the blank layer in the variable layer pane and add layers from the database or by add and edit blank layers When using the database you must be ensure the contents of variable layer pane are showing in the Construction box of the Products Database dialogue The U values for the constructions with the variable layer are shown alongside the vari able layer materials no U value appears in the status bar You can only have one variable layer in a calculation CHAPTER 9 COMPLEX CALCULATIONS 45 Figure 9 5 U value calculation with a variable layer Partial fill cavity wall with variable layer Brick and block cavity wall partial fill Wall Thickness Vapour Vapour Pitch Bridge Resistivity Resistance Details MNs gm 1 Outside surface resistance 0 040 2 Brick outer leaf BRE 103 0 0 770 0 134 50 00 5 15 17 3 M 3 Cavity gt 25mm wall CIBS 0 180 0 00 ZJ Variatie lever a is is a a 5 Blockwork medium Exposed 1400kg m 440 100 0 0 200 0 500 50 00 5 00 2 2 Mo 6 Plaster Dabs Cavity 15 0 0 170 0 08 20 0 PI 7 Plasterboard 855250 12 5 0 170 0 074 60 00 0 75 x 4 p Variable layers 5 f Wrap text Insulation resistance rounded down Layer Thickness Thermal U value dU Bridge Conductivity Combined Details mm wemK Method Deke a 1 Rock fibre BS525
82. etting of this box the software then close the Project Informa tion the program asks if you want to use that setting as the default value for future calculations e Boiler comes under the exception procedure allowed in Part L The Domestic Building Services Compliance guide requires new or replacement gas or oil boilers to have efficiency levels which can only be achieved by condensing appliances A non condensing boiler may be be permitted if the situation meets the condi tions in the government s Condensing boiler installation assessment procedure for dwellings You may therefore only tick this box if the conditions of the assessment procedure are satisfied 16 7 Entering project data The data for the SAP calculation is entered using the SAP 9 90 2009 Worksheet Values dialogue The dialogue is organised by a series of tabs each covering one part of the SAP input data they are e Dwelling dimensions the basic configuration of the dwelling including the pro portion of low energy lighting chapter 1 7 e Ventilation air infiltration rates ventilation strategy and system efficiency ter 18 e Walls roofs and floors heat loss and thermal mass of the opaque building fabric chapter 19 e Openings heat loss solar gain and daylighting information for windows doors and rooflights chapter 20 e Water heating the source of domestic hot water its efficiency and fuel type in cluding details of any solar panels chapter 21
83. fic heat capacity the amount of energy required to raise the temperature of one kilogram of the material by one Kelvin roughly equivalent to 1 degree Celcius kJ kg 7 2 Types of materials and cavities Layers within building elements have different combinations of properties JPA Designer recognises four types of material and three types of cavity In addition the program distinguishes between materials which are thermal insulation and those which are not The rest of this section describes the types of layer and the data required for each one CHAPTER 7 WORKING WITH MATERIALS 30 7 2 1 Normal Normal materials have the same composition all the way through so the thermal resis tance of a normal layer is determined by the material s conductivity and thickness A normal material requires the following information e Type select Normal e Description type a description of the layer this will appear on the print out e Thickness enter in millimetres mm e Thermal conductivity enter in W mK e The program calculates the Thermal resistance in m K W e Vapour resistivity only required if you will be carrying out condensation risk anal ysis enter in MNs gm e The program calculates the Vapour resistance in MNs g 7 2 2 Composite materials For composite materials for example insulation backed plasterboard there is no direct link between the conductivity thickness and thermal resistance You must therefore use the the
84. g 7 Special features 8 Checking compliance 9 Outputting SAP results N N N 126 128 129 130 130 131 131 132 133 134 135 136 137 Part I JPA Designer basics 1 Introducing JPA Designer Welcome to JPA Designer version 5 00 the design and calculation program from JPA TL Ltd JPA Designer can e carry out SAP calculations to SAP versions 9 90 9 81 9 80 and 9 70 to demon strate compliance with the energy efficiency requirements of Building Regulations and Building Standards and as part of Code for Sustainable Homes CSH assess ments e issue On construction Energy Performance Certificates EPCs for dwellings in Eng land and Wales Scotland and Northern Ireland e calculate U values and values for building elements e carry out condensation risk analysis to BS EN ISO 13788 JPA Designer includes many features to make the calculation process easier e Project based file system enables you to keep all the calculations for one develop ment in same project file e Links between U value and SAP calculations so that SAP calculations are automat ically updated when U value calculations change e Calculation results can be produced as PDF files for emailing e Includes a database of common materials to speed U value calculations e On screen help which includes the official SAP guidance We hope you find JPA Designer a useful calculation tool We are always happy to receive
85. g them according to the building element in they sit The buttons below the list allow you to create edit and delete openings For each opening the data is entered using the Doors Windows amp Rooflights dialogue section 20 1 To define a new opening 1 In the Openings tab click the New button The New Doors Windows amp Rooflights dialogue opens 2 Enter the data for the opening and click OK To duplicate an opening Duplicating an opening creates a new copy of the original opening which can then be edited as most openings will share the same glazing and frame type using the duplicate facility can speed up data entry 1 In the Openings tab select the opening you want to duplicate 2 Click the Duplicate button A copy of the opening is created 3 Double click on the duplicated opening to edit it To edit an existing opening You can enter each opening individually or you can group the openings on each face of the building into one area provided they have the same frame and glazing type 101 CHAPTER 20 OPENINGS 102 Figure 20 1 The Openings tab Dimensions Ventilation Walls roofs amp floors Openings water heating Primary heating Secondary heating Overheating amp Co No Element type Area U value Orientation Frame Air gap 5 0 5 1 5 2 5 3 5 4 55 5 6 5 7 5 8 59 Rin 1 2 Oooo d wa A d ARDET nat PUIRT DESEN AUSES na wists EARN sate Window
86. he Openings tab Click the Delete button A confirmation dialogue appears Click Yes to delete the opening or No to retain it To change multiple U values This function enables you to revise the U values of several openings at once 1 Select the first of the openings by clicking on it once CHAPTER 20 OPENINGS 103 Figure 20 2 Changing the U values of several openings at the same time Change Multipe U values Enter a new U value for all the selected items Cancel 2 Hold down the lt Shift gt key and click the last of the openings That opening and all the openings between the first and last are now selected 3 Click the Change U value of selected openings button The Change Multiple U values dialogue opens Figure 20 2 4 Enter the new U value then click OK The U values are changed 20 1 The Windows Doors and Rooflights dialogue The Doors Windows amp Rooflights dialogue is used to enter the data about the openings within the dwelling Figure 20 3 the dialogue is headed either New Doors Windows amp Rooflights or Edit Doors Windows amp Rooflights The dialogue requires the following data e Opening Type Use the drop down to select whether it is a window rooflight or door e Opening within Use the drop down to select which element wall roof which contains the opening The software uses this information to calculate the net ar eas of the elements The elements offered in the drop down
87. he Ru coefficient is used to adjust the U value of an element to allow for the beneficial effect of an enclosed but unheated space to its exterior The commonest unheated spaces are integral garages in houses and access corridors to apartment blocks some parts of room in the roof constructions are also treated as unheated spaces Values for Ru are given in section 3 3 of the SAP documentation clicking the Help displays the relevant guidance e Description An optional text description of the element can be entered in the Description text box A description makes it easier to distinguish between several elements of the same type when editing a calculation e Perimeter and Cost these boxes should be ignored 19 3 Managing building elements To add a new element 1 Click the New button the New Element dialogue opens 2 Enter the data for the element then click OK JPA Designer shows the summary data new element in the element list To edit an element 1 Click the element to edit then click the Edit button The Edit Element dialogue opens 2 Make the changes to the element then click OK To duplicate an element 1 Select the element to duplicate by clicking on it once 2 Click the Duplicate button A copy of the element is created 3 Select the new element and click Edit to make changes To delete an element 1 Select the element to delete by clicking on it once 2 Click the Delete button A confirm dialogue appears 3
88. he SAP 9 90 document contains a method for testing levels of solar gain The SAP 2009 module implements that method to test for compliance 4 Quality of construction The performance of the dwelling as built must be con sistent with that predicted by the DER one measure is the air permeability rate established by pressure testing For a dwelling which is pressure tested the mea sured air permeability must be lower than 10 m hm and the DER calculated using the test result must be lower than the TER The SAP 2005 module allows pressure testing data to be entered and will check for compliance 5 Operating and maintenance instructions Regulation 40 requires the building owner to be provided with information to enable energy efficient operation of the build ing The outputs from the SAP 2009 module can be used to help to meet that requirement 16 3 Preparing to carry out a SAP 2009 calculation Before starting a SAP calculation you should ensure you have all the input data including e dwelling floor area e the ventilation strategy e the design or achieved air permeability CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 75 e U values values kappa values and areas of external and party walls roofs and floors you can carry out the U value and value calculations using one of the JPA Designer U value modules e values and areas of internal walls and floors e w values psi values for junctions and the lengths of junctio
89. he menu bar select File gt Open project The Open dialogue opens 2 Select the file you want to work with then click Open The project opens in the Project Manager window 3 5 Adding calculations to a project You can add new calculations to a project in the Project Manager window To add a new U value calculation to a project 1 From the menu bar select Insert gt U value calculation The Description dialogue opens Figure 34 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 13 Figure 3 4 The Description dialogue Description Enter a description for the dwelling Mid terrace type 1 Cance 2 Type a name for the calculation in the Description dialogue e g warm roof and click OK The new calculation is added to the project To add a new SAP calculation to a project 1 From the menu bar select Insert gt Dwelling SAP v9 81 2005 calculation gt Single dwelling The Description dialogue opens Figure 3 4 2 Type a name for the calculation in the Description dialogue e g Plot 23 and click OK The new calculation is added to the project You can also use the Insert menu to insert calculations to versions 9 81 9 80 and 9 70 of SAP as well as SAP calculations for multiple dwellings 3 6 Opening and closing calculations To open a U value or SAP calculation from the Project Manager window either e double click on the calculation name or e click once on the calculation name then from the menu bar s
90. heet for the various product types and in some cases data sheets for individual products To incorporate a technology using the Appendix Q procedure 1 Carry out the SAP calculation as normal 2 Complete the the appropriate Appendix Q spreadsheet this may require informa tion on the product taken from a datasheet and may involve changes to the SAP calculation 3 Transfer the results from the spreadsheet to the Special features section of the Pho tovoltaics and Alternative Technologies tab Figure 26 1 entering e a brief Description of the technology e the Energy saved figure using the drop down to select the Type of fuel saved e the Energy used figure using the drop down to select the Type of fuel used Where there is more than one Appendix Q technology use the New and Edit buttons to add those technologies to the calculation Note that all the technologies which required Appendix Q with SAP 9 81 can all be entered directly in JPA Designer in SAP 2009 There are separate spreadsheets for different versions of SAP make sure you use the appropriate version 135 28 Checking compliance Once you have entered all the data for the dwelling you can check its compliance status The program will display pass green or fail red in the compliance zone at the bottom right corner of the main SAP window If the dwelling fails you can hold your curser over over the compliance zone and the software will display a tool
91. ical fasteners then enter the fasteners dimensions and spacing The alpha coefficient is 0 8 for warm constructions and 1 6 for cold hybrid constructions 9 2 Twin skin metal cladding and roofing The extent of the thermal bridging in twin skin metal roofing and cladding systems formed with rails and brackets means the combined method has to be modified JPA Designer uses the method described in the Steel Construction Institute research paper SCI P312 that method takes account of e The bridging effects of the rail and the air spaces around the rail e The point bridging produced by the brackets CHAPTER 9 COMPLEX CALCULATIONS 42 e The compression of the insulation by a shallow profiled liner profile depth less than 25 mm To calculate U values for twin skin metal roofing and cladding 10 11 Create and open a new U value calculation Enter any project information In the U value Construction dialogue select either wall or flat roof Do not tick the Built up metal roof wall box at this stage Click OK Enter the layers in the construction in the main U value window Enter the insulation in two layers the first layer being the insulation which is bridged by the rails and the second that which is penetrated only by the brackets For example a 170 mm layer of insulation in a construction with 40 mm deep rails should be divided into one layer 40 mm thick and one layer 130 mm thick You will find later parts
92. ick the Default box if you want the logo to be included on all U value print outs Email In future versions of the program you will be able to email calculations directly from JPA Designer There is no need to provide this information in the current version of the program Other The Other tab lets you set e the default thermal conductivity of the screed in a beam and block floor construc tion e calculating the effect of mechanical fasteners in U value calculations using the method in BS EN ISO 6946 2007 e the location of the SAP preview window together with it length this is not the size of the window on screen but the amount of scrollable space allocated to the preview a long preview is helpful if you want to view the calculation results on screen when your calculation has a large numbers of elements and openings e whether EPCs are lodged in Landmark s test or live environments this is mainly used by JPA TL and accreditation schemes for testing systems Part Il U value calculations 4 The JPA Designer U value modules JPA Designer offers two U value modules e Uvalue 2010 calculates U values for walls roofs and intermediate floors using the combined method BS EN ISO 6946 and also calculates U values for ground floors to BS EN ISO 13370 e Uvalue 2010 Professional has the functionality of Uvalue 2010 and also performs condensation risk analysis using the methods set out in BS EN ISO 13788 2002 and BS
93. ighest amount of condensate is predicted to be deposited e ISO Winter peak build up the month which sees the highest cumulative amount of condensation For each column the amount of condensate is shown in grams per square metre The result n a means no condensation is predicted at that interface You can see more detailed results in the ISO Condensation table For calculations to BS 5250 1989 Appendix D the significant columns are e Winter buildup the amount of condensate predicted over 60 winter days e Annual buildup the amount of condensate carried forward after allowing for sum mer evaporation For each column the amount of condensate is shown in grams per square metre g m Zero shown in both columns means no condensation is predicted while a negative num ber in the annual buildup column indicates summer evaporation will be greater than winter deposition 15 3 Using the previous calculation method To use the BS 5250 1998 calculation method untick the Use 2003 condensation method box in the Environmental conditions dialogue The dialogue box will now show the environmental data for the BS 5250 1989 method External conditions The program sets standard values for external environmental condi tions following BS 6229 and BS 5250 which are e summer temperature 18 C winter temperature 5 C e summer relative humidity 65 winter relative humidity 95 If you need to calculate condensation risk for othe
94. ing system using the Source of domes tic hot water drop box Once you have made a selection the program will display the appropriate data entry fields The hot water sources are e Hot water storage tank e Instantaneous water heating at point of use e Combination boiler e Community heating scheme e Multi point gas water heater or heat exchange built into a gas warm air system e Boiler with thermal store e Combined primary storage unit CPSU e MicroCHP or Heat pump Use this option for heat pump with data taken from the Product Characteristics Database For all other heat pumps use Hot water storage tank e Community heating scheme providing domestic hot water only 21 1 Hot water storage tank This system should be selected where the hot water which is heated by the central heating boiler or immersion coil then stored in a tank or cylinder ready for use Figure 21 1 Enter the following data for the tank e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down 107 CHAPTER 21 WATER HEATING 108 Figure 21 1 The Water heating tab showing settings for a hot water storage tank Dimensions Ventilation Walls roots amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Source of domestic hot water Hot water storage tank zj Hot water tank Storage tank insulation Volume l 210
95. it gt Project Information from the menu bar The Project Information dialogue opens 2 Enter project information by typing it into the appropriate fields Use the lt Tab gt key to move between fields You can also add plot numbers and drawing references to link the calculation to a particular dwelling on site Note The UPRN box and the get UPRN and clear UPRN buttons are only used when preparing to issue an EPC for a completed dwelling For instructions on using them please see the separate guide to issuing EPCs To copy project details from Project Manager 1 In the SAP module select Edit gt Project Information from the menu bar The Project Information dialogue opens 2 Click the Inherit button Any information you entered in Project Manager is copied to the Project Information dialogue here 16 6 2 Dwelling details The Project Information dialogue also contains general information about the dwelling including the type of building the country and the location e Building type this is used in the Energy Performance Certificate Select the closest matching value from the drop down e Country the different parts of the UK have implemented SAP 2009 in slightly dif ferent ways You must use the Country drop down to select the correct location to ensure the dwelling is tested against the appropriate regulations e EPC language sets the language in which the EPC is produced EPCs in England Scotland and Northern Ireland mu
96. ject details 1 In the Uvalue module select Edit gt Project Information from the menu bar The Project Information dialogue opens 2 Enter project information by typing it into the appropriate fields Use the lt Tab gt key to move between fields Click OK when you have entered all the data you need 5 Construction details The thermal performance of building element will be affected by the type of element and its position within a building These conditions are set in the U value Construction dialogue Figure 5 1 which accepts details of e The type of element e g roof wall floor together with additional information for some elements Gection 5 1 e The conditions at the internal and externals surfaces see lsection 5 2 e Details of any light steel frame construction see section 9 1 e Details of built up roofing or cladding see section 9 2 e Corrections factors for fasteners and unheated spaces see section 8 5 To enter data 1 From the menu bar select Edit gt Construction type The U value Construction dia logue opens 2 Enter your data and click OK For some constructions such as those with mechanical fasteners you may find it easier to enter some of the data in the construction dialogue after you have entered the layers of the element 5 1 Element type JPA Designer recognises several types of element which have to be treated differently in the calculation process Use the radio buttons in the
97. l be inserted in the category 2 Click on the clone to edit it To delete a product from a user defined category 1 Select the product you wish to delete 2 Click the Delete product button The product is deleted You can search the database to find specific products 1 Click the Search button The Search Database dialogue opens Figure 14 2 2 In the Search Database dialogue enter the text you want to search for and the di rection the program should search through the database forwards or backwards 3 Tick the Ignore case box if you want the search to ignore capitals and lower case letters 4 Click Find first to start the search The program will display the first matching product in the Products pane 5 Click Find next to go on to the next matching product 6 When you have found the product you want click Close to close the Search dia logue When you have finished working on the database click the Close button to return to the main U value window CHAPTER 14 EDITING THE PRODUCTS DATABASE 64 14 1 Short codes You can assign codes to user defined materials as you enter them in the database The short codes can then be used for rapid data entry using the Products database sec tion 6 1 You can also use short codes to determine the order in which products and materials are presented within categories to speed up data entry for common construc tions To sort the database by short codes you must first assign
98. lculation 16 5 The SAP window o aoaaa ee eee ee eee 16 6 Project information in SAP 16 7 Entering project data 17 Dwelling dimensions 17 1 Low energy lighting lt geste ee eRe ote Bee a Be ae ae ee we Ventilation 18 1 _Air infiltration ee oe oe oe OE OR KREG ER BESS 18 2 Ventilation openings and sheltering 18 3 Ventilation type Walls roofs and floors 19 1 Defining building elements ete he be ol oe a dance 20k a ete eee 19 4 Linear thermal bridging 19 5 Thermal mass Openings 20 1 _The Windows Doors and Rooflights dialogue 20 2 Editing multiple Openings ans e lt 8 2h ee Bees ee ore RAYS Water heating 21 1 Hot water storage tank 2 0 a ee 21 2 Instantaneous water heating at point of use eae IG Be a a Be ee Oe a ee ee ee ee ee oe ee eee ee Gee A oh ee ee 21 7 Combined primary storage unit CPSU 21 9 Community heating scheme providing domestic hot water only 21 10 Solar panels 18 19 20 22 Primary heating 22 1 Dwellings with two main heating systems 22 2 Efficiency data for heating systems 22 3 The main primary heating systems 71 72 73 73 73 74 75 75 77 81 CONTENTS 22 4 Additional data 3 Secondary heating N N A Overheating 2 5 Cooling 26 Renewables 26 1 Photovoltaic panels 26 2 Wind turbines E Bee a e
99. lements there is no need to subtract the areas of openings from wall or roof areas When adding internal walls the areas of both sides of the wall should be measured This is one of the significant changes in data gathering between SAP 2005 9 8x and SAP 2009 9 90 It is a result of the new method for calculating the energy required for heating which now considers the thermal mass of the building fabric every element which contributes to that thermal mass has to be included in the calculation 92 CHAPTER 19 WALLS ROOFS AND FLOORS 93 Figure 19 1 The Walls Roofs and Floors tab Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Detailing New dwelling details are Accredited Construction Details Enter Htb value manually Hte 0 0000 Golcudste Details are NOT Accredited Construction Details Enter y value manually Calc Ref TMP Thermal mass User defined Thermal Mass Parameter 0 00 X No Element type Net Area U value AxU Factored UA K value Axk 72 a T 0 Pitched roofs insulated between joists 56 000 0 120 6 720 6 720 25 00 1400 00 2 Ground floors 56 000 0 210 11 760 11 760 110 00 6160 00 B New Edt Duplicate Tt Delete e U value the rate of heat transfer through the element U values should be cal culated to BS EN ISO 6946 and BS EN ISO 13370 following the guidance in BR 4
100. lly too poor to comply with the standards in the Domestic Building Services Compliance Guide 22 3 2 Storage radiator systems Storage radiator systems are heated with off peak electricity during the night and release that heat throughout the day The only data required is that from the primary heating drop boxes 22 3 3 Warm air systems The heat for warm air systems is provided by gas oil electricity or heat pumps The only data required is that from the primary heating drop boxes except where the heat pump data is entered from the PCD database instead of the default values 22 3 4 Room heater systems This group includes room heaters such as gas or solid fuel fires In most cases the only data required is that from the primary heating drop boxes However where the declared efficiency of the heater is known tick the box Use manufacturer s declared efficiency then complete the Make Model and Declared efficiency boxes and select the BS Test Method used to obtain the efficiency 22 3 5 Other space and water heater systems Electric ceiling heating is currently the only system in this category The only data re quired is that from the primary heating drop boxes 22 3 6 Community heating scheme Community heating schemes use central heat generators to heat water which is then cir culated through pipes to supply space heating and hot water to more than one dwelling The heat may be provided by a number of different systems and commu
101. low certain characters to be used in file names you should ensure the calculation names in JPA Designer do not contain those charac ters otherwise PDF creation will fail The restricted characters are lt gt You can change the printer settings by selecting File gt Printer setup from the menu bar 13 U value calculation options The European standards for factory produced thermal insulation products set out the requirements for determining and quoting the thermal performance of thermal insulation For each product the value of thermal resistance R90 90 shall be rounded downwards to the nearest 0 05 m K W and declared as RD in levels with steps of 0 05 m K W To comply with that requirement JPA Designer rounds down the thermal resistance of all layers which are marked at thermal insulation To mark a layer as thermal insulation tick the is thermal insulation box in the Edit material dialogue Because there may be occasions when you need to carry out calculations without round ing the feature may be turned off and on By default rounding is on this is indicated by red text in the bottom margin of the U value window To change the rounding setting 1 From the menu bar select Options The Calculations Options dialogue opens Figure 13 1 1 Tick the Round down thermal resistance box to toggle rounding on or off 2 Click OK to accept the change The series runs from BS EN 13162 2001 Thermal insulation product
102. lt thermal resistance for the deck of 0 2 m K W for the deck This represents a 18 mm softwood deck Insulation be tween joists should be entered as a separate layer bridged by timber in one dimen CHAPTER 10 GROUND FLOOR U VALUES 52 Figure 10 2 Calculating the resistance of a beam and block deck Deck Resistance mikwi Calculate it Description YZ beams with ABC blocks Block width mm 440 Thickness mm 100 Conductivity rik 0 000 Beam Web width mm 60 Beam conductivity W mE 1 130 Screed Screed depth mm Bd Screed conductivity wm 1 150 10 1 4 Suspended ground floor details In a suspended ground floor whether beam and block or timber there will be some heat loss through the walls of the sub floor void both by conduction and also by air movement JPA Designer calculates that heat loss using the data in Suspended Ground Floor Details section of the Ground Floor Details dialogue The values required are e E the area of ventilation openings per perimeter length of under floor space in 2 m m H the height of the upper surface of the floor above external ground level in m Uw the Uvalue of the walls of the under floor space above ground level calculated according to BS EN ISO 6946 in W m K you can do this as a separate calculation using JPA Designer Fw the wind shield factor see Table 10 1 V the average wind speed at 10m above ground level in m s Lambda the conductivity fac
103. lue Only enter a g window value in here if it is BFRC certified e Area You can enter the opening area directly into the Area box or you can select a size from the Window size drop down or you can enter the Width and Height of the opening Note the Area is entered in metres square but the values for Width and Height are entered in millimetres mm Where there is an overhang above the window CHAPTER 20 OPENINGS 105 you should use the Width and Height boxes to ensure the software correctly takes account of the overshading in the summer overheating calculation e Description The Description box allows you to enter a text description for the element The description does not affect the outcome of the calculation If you have entered a manufacturer s U value the software requires a description We strongly recommend you use the description box to enter a short description for every opening such as its number on the window and door schedule it is much easier to keep track of openings in the calculation when you have a description e Opening orientation The direction in which the opening faces determines how much light it will receive and will therefore affect how much solar flux will pass through the opening The orientation of an opening is set relative to the front eleva tion of the dwelling usually that which contains the front door Set the orientation using the radio buttons Rooflights always face Top If you are unsure which wa
104. mation dialogue in the SAP module see 4 When you open the 9 80 calculation you will be prompted to add additional details which were not required by the earlier version of SAP CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 16 3 12 Program options There are many ways in which you can customise the performance and outputs of JPA Designer Most of the options are controlled from the Options dialogue To open the Options dialogue in Project Manager select Options from the menu bar The Options dialogue box has four tabs General e Printer margins enables you to set the page margins If you are using headed paper you can set the top margin for the first page to be greater than that of the second page which can be printed on continuation paper or blank paper e Company name and address the details entered here will appear on print outs and PDFs of U value and SAP calculations e Options select which items which should appear on the print outs and determine whether the program should attempt to make a back up copy of the project file e Uvalue Disclaimer enter the disclaimer text to appear on print outs and PDFs of U value calculations e SAP Nondwell disclaimer enter the disclaimer text to appear on print outs and PDFs of SAP and Nondwell calculations e Default SAP location determines which regulations will be used for SAP calcula tions currently the choices are England and Wales Scotland or Northern Ireland e Start u
105. n your PC and explains how the user registration and on line licence checking systems work It also includes instructions on updating your copy of JPA Designer 2 1 System requirements JPA Designer requires a PC running Windows XP or later The PC will require an regular internet connection to check the validity of your licence to update the BRE Product Characteristics Database for the SAP 2009 module and to issue EPCs JPA Designer can run on Intel based Apple Macintosh computers using virtualisation software such as Parallels or VMWare or through Bootcamp However we do not guarantee the program will run on such systems nor do we offer technical support 2 2 Installation To install JPA Designer on your PC 1 Go to our web site at www techlit co uk and right click on the link labelled down load JPA Designer select Save link as for Firefox or Save target as for Internet Explorer 2 Save the installer file jsetup990 exe to your PC we recommend downloading the file to the Desktop The download is about 13 MB 3 When the download is complete double click on the file jsetup990 exe The In stallShield Wizard configures itself and after a few moments opens You may see a security warning that the publisher of the file could not be identified If you do click Run to continue the installation process 4 Click Next to continue with installation The installer displays the Customer infor mation screen 5 Enter your name an
106. nd closing JPA Designer To open JPA Designer CHAPTER 2 GETTING STARTED 9 e Select Start gt Programs gt JPA Designer gt JPA Designer from the Windows Start but ton To close JPA Designer e Select File gt Exit from the JPA Designer menu bar The program will prompt you to close any files which have not been saved 2 7 Uninstalling JPA Designer To uninstall JPA Designer 1 Open the Windows Add Remove programs control panel to access Control Panels select Settings gt Control Panels from the Start button 2 Select JPA Designer in the Add Remove Programs Properties dialogue and click Add Remove Windows will uninstall the program files and remove its icons That will not remove any JPA Designer project files 3 Managing projects and calculations JPA Designer organises and saves calculations in project files which have the extension JDP You can save multiple SAP and U value calculations in the same file Calculations are created saved and managed in the JPA Designer Project Manager win dow Figure 2 1 which lists all the calculations in the current project 3 1 Starting a new project Whenever you start JPA Designer the program creates a new blank project which you can start using straight away You can also create a new project at any time by selecting File gt New Project from the main menu or clicking the New Project button on the toolbar You can change the default project name A blank project to something mor
107. nergy performance certificate EPC a draft energy performance certificate You must be a member of an appropriate accreditation scheme to produce a final EPC see the separate guidance document for instructions e Predicted Energy Assessment PEA the energy assessment required for off plan sales e Assessment of Zero Carbon Home To print the results 1 Select File gt Print from the menu bar or click the Print button on the tool bar The Sections To Print dialogue opens Figure 29 1 2 Use the tick boxes to select the outputs you want to produce 3 Click OK The Print preview window opens 4 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 137 CHAPTER 29 OUTPUTTING SAP RESULTS 138 Figure 29 1 SAP Sections To Print dialogue Sections To Print xy Sections to print Printer options v SAP Worksheet Summer Overheating Printer setup TER Worksheet Summary Certificate z DER Worksheet Printer margins FEE Worksheet Energy Performance Certificate Printer Font Input Data Regulations Checklist Predicted Energy Assessment Assessment of Zero Carbon Home Jf K X Cancel To create a PDF file of the results 1 From the menu bar select File gt Create PDF A dialogue asks if you want to open the PDF when it is created 2 Select Yes or No The Sections To Print dialogue opens Figure 29 1 3 Use the ti
108. ners correction Layer bridged by mechanical fasteners sowool Cavity Wall System CWS v Correction for mechanical fasteners Eat New Alpha 0 8 mt Thermal conductivity 47 Wimk Fasteners per 25 off Fasteners cross 425 mm Hep of fasteners square metre sectional area C es Warm flat roofs where the insulation and or the waterproof membrane is mechan ically fixed to the deck There is no need to apply a correction to constructions without fasteners e g solid masonry walls for fasteners with both ends in contact with metal sheets for wall ties across an empty cavity for wall ties between a masonry leaf and timber studs where the thermal conductivity of the fastener or part of it is less than 1W mK such as plastic ties The correction factor dUf is calculated from The thermal resistance of the bridged layer and the element itself The alpha coefficient which is 0 8 for the standard case of a non recessed fastener Alpha can be adjusted for recessed fasteners or fasteners which penetrate the insu lation at an angle See ISO 6946 2007 section D 3 2 The thermal conductivity of the fastener typically 17 W mK for stainless steel and 60 W mK for mild steel The number of fasteners per square metre The cross sectional area of the fastener typical double triangle ties have a cross sectional area of 11 3 mm based on 3 8 mm diameter To enter data for mechanical fasteners 1 From the menu bar select
109. ng a dwelling with two main heating systems 4 Dwelling has two main heating systems Main heating system 1 Fraction 0 50 Main heating system 2 Main heating system Both systems heat whole house Group Central heating systems with radiators or underfloor heating z 1 MSS aoa wines I 22 2 Efficiency data for heating systems There are three possible sources of efficiency data for heating systems e default values given in Table 4 of the SAP 2009 document e user entered efficiencies this can be useful at the design stage when no appliance has been specified e data from the Product Characteristics Database PCD subsection 22 2 1 this gives the most accurate values for specific appliances For some systems for example gas fired warm air systems only the default SAP 2009 efficiencies may be used whilst for others for example gas condensing boilers any of the three sources is acceptable Note that heat pumps must be specified either using the PCD or by accepting the default efficiencies microCHP systems can only be specified by means of the PCD CHAPTER 22 PRIMARY HEATING 120 22 2 1 The Product Characteristics Database The Products Characteristics Database contains performance data for gas oil and solid fuel boilers heat pumps mechanical ventilation systems and some renewable technolo gies The database is maintained by the BRE and is available for download at www boilers org uk A new version of the database
110. nity heating schemes may often include Combined Heat and Power CHP systems which will pro vide heat and generate electricity Appendix C of the SAP 2009 document contains further information on the treatment of community heating schemes in SAP To specify a community heating scheme in JPA Designer e set Group to Community heating scheme JPA Designer displays the Community heating section of the Primary heating tab Figure 22 4 CHAPTER 22 PRIMARY HEATING 124 Figure 22 4 Data entry for a community heating scheme with two heat sources Group Community Heating Scheme Zi Electricity tariff Heating controls Charging system linked to use of community heating programmer and room thermo Y Standard tariff v Community heating Heat distribution system Piping gt 1991 pre insulated medium temp variable flow Heat Source Boilers Fuel Heat from boilers mains gas Heat fraction 0 4000 Efficiency 90 5000 D m SOUICES Source CHP Fuel Heat from boilers waste combustion Heat fraction 0 6000 Efficiency 85 0000 CHP heat to power rat t N Edit it Delete Figure 22 5 Setting a heat source for community heating Community Heating Heat source Heat source Boilers X Fuel Heat from boilers mains gas v Heat fraction 1 Efficiency 90 o cane e set the heat sources then e set the heating controls and the heat distribution system To set the heat sour
111. nlakt e where an accredited construction detail is used the 7 value for that detail e where a w value has been calculated the 7 value for that detail Note that the requirement in Approved Document L1A to increase such calculated but non accredited p values by the greatest of 0 02 or 25 will not be introduced until third party accreditation schemes are operating e a default value from the final column of table K 1 in the SAP 2009 document The data for the Htb calculation is entered using the Calculate HTB dialogue Figure 19 3 which lists all the junction types assigned to the dwelling showing for each one e the accredited linear thermal transmittance which represents the w value for the corresponding accredited construction detail e the achieved linear thermal transmittance for the junction e the length of the detail in metres e the rate of heat loss through the junction W K The buttons at the bottom of the dialogue allow you to Add Edit and Delete junctions To use the Calculate Htb dialogue CHAPTER 19 WALLS ROOFS AND FLOORS 99 1 Tick the box Enter HTB value manually 2 Click the Calculate it button The Calculate Htb dialogue opens To add a junction 1 Click Add The Junction dialogue opens 2 Select the Junction type from the drop down 3 Enter a Description this is optional but adding a description will make it easier to manage the calculation 4 Enter the Achieved linear thermal transmittan
112. ns e U values areas and orientation of windows doors and rooflights e the proposed water heating system e the proposed primary and secondary heating systems e details of any photovoltaic cells or other low carbon technology 16 4 Carrying out a SAP 2009 calculation The main steps to carry out a SAP 2009 are 1 Create a new SAP 2005 calculation section 3 5 2 Open the calculation in the SAP module section 3 6 3 Enter the Project Information section 16 6 4 Open the SAP Worksheet Values dialogue and enter the dwelling data section 16 7 5 Check the compliance status on the main SAP window section 16 5 and make any necessary changes 6 Produce print outs or PDF files of the calculation results chapter 29 7 Save your project section 3 3 16 5 The SAP window The SAP window lets you access the SAP menus and tool bar and displays the results of calculations Figure 16 1 The main features are 1 The menu bar 2 The SAP 2009 toolbar the buttons give direct access to key program functions and to the tabs on the SAP Worksheet Values dialogue 3 The status lights which indicate whether you have entered all green some amber or none red of the data for each section 4 The calculation name as entered in the Project Manager window CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 76 Figure 16 1 The main SAP window E JPA Designer psf H File Edit View Help Green Bo OMe oa O O
113. nt an additional page showing the details of the bridging calculations You can also choose whether to include the ISO mois ture table for condensation analysis and whether the calculation should show the logo of the BBA TIMSA U value accreditation scheme 3 Click OK The Print preview window opens 4 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 To create a PDF file of the results 1 From the menu bar select File gt Create PDF A dialogue asks if you want to open the PDF when it is created 2 Select Yes or No The Sections To Print dialogue opens Figure 12 1 3 Use the tick boxes to select whether to print an additional page showing the de tails of the bridging calculations you can also choose whether to include the ISO moisture table for condensation analysis 4 Click OK The Print preview window opens 5 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 The program will then create a PDF file of the calculation The name of the PDF file will include the JPA Designer file name and the calcula tion name so the calculation tile hung wall in a project The Meadows will be called The Meadows JDPtile hung wall PDF The file will be saved into the JPA Designer program folder or in the start up folder you have specified Note as Windows does not al
114. nter in W mK The program calculates the Thermal resistance in m K W Vapour resistance enter in MNs g 7 2 4 Membranes Membranes such as vapour control layers or vapour open roofing underlays are treated as having no thermal resistance They therefore have no effect on U value calculations only affecting condensation risk analysis Membranes require the following information e Type select Membrane e Description type a description of the layer this will appear on the print out e Vapour resistance enter in MNs g 7 2 5 Clear cavities The thermal resistance of a cavity is not calculated from its thickness although it is af fected by the direction of heat flow within the construction Standard values for cavities may be found in the Products Database and in publications such as BS 5250 Clear cavities such as those in cavity walls require the following information e Type select Clear cavity e Description type a description of the layer this will appear on the print out e Thickness enter in millimetres mm e Thermal resistance enter in m K W Vapour resistance cavities have a vapour resistance of 0 00 MNs g 7 2 6 Bridged cavities Bridged cavities such as those in some timber framed constructions are treated the same as Clear cavities but with bridging details added section 7 3 Bridged cavities require the following information e Type select Bridged cavity e Description type a descri
115. ockwool Cladding Roll Bitustick Bitustick Rockwool Cladding Roll 757 97 1743 47 2805 52 3735 18 4424 80 4746 52 4604 46 4040 31 3267 77 2579 22 2214 83 Print form i Close 15 2 1 ISO Condensation Table The ISO Condensation Table shows the amount of condensate predicted at each interface in the construction and is the most accurate means of viewing the results of an analysis to ISO 13788 To view the ISO Condensation Table select View gt ISO Condensation Table from the menu bar The upper part of the table Figure 15 1 shows the interfaces within the construction When you select an interface by clicking on it the lower half of the table shows the amount of condensation predicted at that interface It shows the amount of condensate deposited or evaporated each month gc and the accumulated condensate at the end of each month Ma both measured in g m negative numbers indicate evaporation The results start with the first month in which condensation is predicted or January if no condensation is predicted in any month Guidance on interpreting results is given in BS 5250 2002 and BS EN ISO 13788 CHAPTER 15 ASSESSING THE RISK OF INTERSTITIAL CONDENSATION 69 Figure 15 2 Dewpoint graph for a roof with condensation predicted at the interface between layers 4 and 5 Dewpoint Graph o 2 l Er Ne A R re m e Always on top li Winter Summer Temperature Dewpoint Outside Rso
116. of any changes you have made to the data and closes the dialogue e Cancel Closes the dialogue but ignores any changes you have made to the calcu lation e Apply Revises the calculation taking account of any changes you have made to the data but leaves the dialogue open With a monitor set to 1024 by 800 pixels or higher it is possible to see the main SAP window and the SAP 9 90 2009 Worksheet Values dialogue at the same time By using the Apply button you can see the effect of design changes upon the calculation immediately e Help Gives you access to the government s SAP guidance and an on line version of this manual e Last Takes you to the previous tab on the dialogue e Next Takes you to the next tab on the dialogue 17 Dwelling dimensions The area and average room height for each storey are used throughout the SAP calcu lation for example to determine hot water and lighting usage and the rate of heat loss through ventilation The data is entered using the Dwelling dimensions tab of the SAP Worksheet values dialogue Figure 17 1 e For each storey the floor area in m and the average room height JPA Designer will calculate and display the volume of each storey the total floor area of the dwelling and the total volume of the dwelling There are two lines for Ground floors to allow for dwellings which have a double height lounge The Exposed floor line may be used for floors of apartments which a
117. of the calculation easier if you give the two layers distinctive names Enter the bridging details for the layer of insulation bridged by the rails for details In the Edit Materials dialogue select one dimensional bridging to show the thermal bridging details Enter the details of the rails bridge material steel studs bridge width non bridge width The software sets the bridge thermal con ductivity The program will show the proportion bridged and the thermal resistance of the bridge For L shaped sections the bridge width will usually be the thickness of the steel but for C and U sections where the rail penetrates the insulation layer twice use double the thickness of the steel as the bridge width Enter the bridge details for the air spaces caused by the rail Tick the Second bridge box The Optional second bridge section is displayed Enter the bridge material air and bridge width in mm use twice the rail width to allow for the compression of the insulation around the rails The program calculates the proportion bridged using the data from the first bridge so the non bridged width Centre to centre distance of rails bridge thickness 1 bridge thickness 2 To calculate the thermal resistance of the air space click the Small airspace re sistance button The Small Airspace Resistance Calculator dialogue opens ure 9 3 Enter the thickness and width of the air space The thickness will be th
118. ome cases different maximum thicknesses CHAPTER 9 COMPLEX CALCULATIONS 46 Tapered insulation is entered in JPA Designer using the Tapered Areas dialogue Fig lure 9 7 The dialogue requires three items of general information e a description of the layer you can use the name or type of insulation e the minimum tapered layer thickness that is the minimum depth of the insulation layer which is continuous across all parts of the roof measured in mm e the conductivity of the insulation lambda this is entered in W mK The data on the different roof blocks is entered in the three tables with each block having its own entry in the appropriate section with the following data e surface area m7 e taper thickness t in mm Figure 9 6 shows a roof with tapered insulation laid with falls towards the perimeter To calculate the U value the tapered layer should be divided into eight blocks with two a and e being rectangles sloping from the centre line to the perimeter and the remainder being triangles in each case sloping from the highest corner at the centre line to the lowest side at the perimeter b c d f g and h Figure 9 7 shows those eight blocks entered on the Tapered areas dialogue To enter a tapered layer in an existing U value calculation 1 Divide the roof into blocks and calculate the minimum thickness block areas and taper thicknesses 2 From the menu bar select Insert gt Tapered layer 3 Enter th
119. oom height for the lowest floor is measured from finished floor surface to ceiling surface For every other storey the height is measured from the ceiling of the floor below for example the height of the second storey in a two storey house is measured from the underside of the ceiling of the first storey to the underside of the ceiling of the second storey This convention ensures that the volume of the floor structure is included within the calculation For room in the roof constructions you will need to determine an average storey height Where a floor has a different occupancy beneath it such as another flat or maisonette the party box should be ticked for that floor Make sure you enter the values against the appropriate storey otherwise you may subsequently have problems lodging the EPC This is particularly important for flats do not use ground floor unless it actually is a ground floor flat e Total floor area which is living area Enter the area of the main living room of the dwelling JPA Designer will calculate the fraction that forms of the total floor area The living room is defined as the room marked on the plan as the lounge or living room or the largest public room The area of other rooms which are not separated from the living room by doors should also be included However the living area cannot extend over more than one storey e Building faces Select the orientation of the front face of the dwelling from the list
120. or ai a Modest 20 60 sky blocked Dedicated solar storage litres 90 00 Horizontal 60 degrees North None or very little lt 20 sky blocked v Separate solar cylinder 30 degrees Vertical Declared values 45 degrees v Solar powered pump 21 10 Solar panels Solar panels use sunlight to pre heat water for the domestic hot water system Guidance on including solar panels in the calculation is given in Appendix H of the SAP documen tation Where possible data from the panel s test certificate should be used otherwise use data from table H1 of the SAP documentation Where a dwelling has solar panels specify The net Aperture area of solar collector in square metres e The Zero loss efficiency of the collector e The heat loss coefficient of the collector e The volume of the dedicated solar storage See figure H2 of the SAP documentation for definitions e Whether there is a separate solar cylinder e The solar collector type using the radio buttons e The pitch of the panels measured from the horizontal and their orientation e The amount of overshading on the panels generally this will be less than the over shading of windows facing the same direction e Whether there is a solar powered pump This will reduce the amount of electricity used for pumping water 22 Primary heating The primary heating system is the main heating system for the dwelling which will often provide hot water as well as space heating it
121. ormation in the Project Information dialogue 3 In the U value Construction dialogue select Solid ground floor or Suspended ground floor enter a description for the construction then click OK The Ground Floor Details dialogue opens 4 Enter the data for the ground section 10 1 Click OK 5 Add the remaining layers of the floor construction Include layers to represent e Screed e Insulation e Flooring such as particle board Omit any layers which consist of e Hardcore beneath a groundbearing slab e Groundbearing concrete slabs with density greater than 1800 kg m e Thin floor coverings such as vinyl or carpet For further guidance refer to the BR 443 Conventions for U value calculations 49 CHAPTER 10 GROUND FLOOR U VALUES 50 Figure 10 1 The Ground Floor Details Dialogue Ground Floor Details Floor type Floor dimensions Suspended Ground Floor Details for ISO 13370 Solid P 0 00000 Calculate it V E m m 0 0015 h m 9 300 wm 0 300 Suspended block amp beam Perimeter m 9 09 Uw wr 1 700 fw 0 050 Suspended Area m 0 00 lambda 1 500 m s 5 000 Default Help Deck Edge insulation Resist mek Aw i ners AN a None Horizontal Vertical Description Internal surface Block resistance n K AW 0 140 Width mm 440 Thickness mm 100 a External surface Conductivity W mK 0 000 resistance meK AW 0 040 Beam Insulation a Web width mm 60 hame BEAN CEINE TET Insulation thickness mm oo
122. otterton Baxi Bermuda Inset 2 50 4E Baxi Potterton Baxi Combi 130 HE Baxi Potterton Potterton Promax 24HE Baxi Potterton Potterton Promax System HE Baxi Potterton Potterton Promax 15 HE m 44 075 03 78 4 GC No 47 590 04 89 6 GC No 41 590 62 90 5 GC No 41 590 69 90 6 GC No 41 590 58 90 4 5 Click the Use selected boiler button The Boiler database window closes and the Primary heating tab shows the summary details for the chosen boiler There is no need to enter flue draught or keep hot details as all that information is present in the database entry for the boiler To enter a SEDBUK value directly 1 In the Boiler efficiency section select the Use manufacturer s declared SEDBUK value radio button 2 Enter the Make and Model of boiler 3 Use the radio buttons to specify whether a SEDBUK 2005 or 2009 value is being used and enter the Declared SEDBUK value 4 Specify the type and fuel of any Keep hot facility 5 Set the Flue and Draught type 6 For range cookers you must also enter the values for case and water To use the default value CHAPTER 22 PRIMARY HEATING 123 1 In the Boiler efficiency section select the Use default value radio button The soft ware shows the default value for that boiler type 2 Use the radio buttons to enter the details of the Flue and Draught type 3 For range cookers you must also enter the values for ocase and gwater Note that the default values are genera
123. ox 3 Enter a reference for the calculated value of y in the Calc ref box The reference must refer to the calculation used to obtain the stated value e Where no w values or junction lengths are available The calculation proceeds on the basis of y 0 15 To use that value 1 Make sure Enter Htb value manually is unticked 2 At Detailing select Details are not accredited construction details CHAPTER 19 WALLS ROOFS AND FLOORS 100 19 5 Thermal mass There are three methods for entering data on the thermal mass of the building fabric 1 Set the value for all exposed party and internal elements The program calcu lates the thermal mass parameter TMP from those values and the areas of those elements the result is displayed in the TMP box 2 Enter a set TMP Tick User defined Thermal Mass Parameter then enter the value in the TMP box 3 Use one of the three default thermal mass parameters Tick User defined Thermal Mass Parameter then select a thermal mass category from the Thermal mass drop down 20 Openings Openings in walls and roofs windows doors affect three aspects of the SAP calculation e Heat loss assessed through the U value e Solar gain assessed through the g window value e Daylighting assessed through the type of glazing Data on openings is entered using the Openings tab of the SAP Worksheet Values dia logue Figure 20 1 The tab lists the dwelling s windows doors and rooflights groupin
124. ox this box is used for retrieving details you have previously stored 3 If you want to store the client details to re use later click Add to clients 4 Click OK when you have entered all the data you need To re use existing client data simply click_on the drop down in the Project information dialogue and select a client from the list Figure 3 3 If you need to edit the stored details click Edit clients list then make the changes in the Edit Clients dialogue CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 12 Figure 3 3 The client name and address drop down Client name amp address Hawksmoore Contracts Mr A T Builder 0 Gibbons Esq T amimnnville 3 3 Saving projects JPA Designer project are saved in the same way as any other file 1 From the menu bar select File gt Save Project The Save As dialogue opens 2 Select the folder into which the project should be saved enter a name for the project file By default JPA Designer will add the extension JDP to all file names 3 Click Save JPA Designer saves the project and displays the file name on the program title bar By default JPA Designer will save files into the JPA Designer folder usually c Program Files JPATL JPA Designer 981 You can specify a different default folder using the Op tions dialogue see Gection 312 We recommend you have a daily back up schedule for your data 3 4 Opening projects To open an existing project 1 From t
125. p folder sets the default folder for saving and opening project files e Check for programme updates lets you specify whether or not the software will check for updated versions of JPA Designer For more information see section 2 5 Logo and signature e Logo position JPA Designer can add your company logo to print outs Use these settings to determine the position of the logo The logo file must be a 256 colour bitmap with the file extension BMP and it must be in the JPA Designer folder Enter the name of the file in the text box do not include the path e g enter ogo bmp not c Program files JPATL JPA Designer 981 logo bmp e Address position These settings determine the position of your company address on print outs and PDFs Enter the address itself in the General tab e Certificate signature position JPA Designer can include a digitised signature on printouts of SAP calculations Use these settings to determine the position of the signature The signature file must be a 256 colour bitmap with the file extension and must be stored in the same folder as the program files The SAP certificate is only used with SAP 2001 version 9 70 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 17 e TIMSA Logo if you are a member of the BBA TIMSA U value accreditation scheme you can add the scheme logo to you print outs The logo must be a 256 colour bitmap with the file extension and must be stored in the same folder as the program files T
126. proved accreditation scheme You can find more information on suitable accreditation schemes on our web site The software also carries out similar tests for regulations in Scotland 73 CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 74 1 Meeting the TER The Dwelling CO Emission Rate DER measured as the amount of CO per square metre of floor area emitted as a consequence of providing space heating hot water and lighting for a dwelling must be less than a target rate That Target Emission Rate TER is based on the CO emissions from a notional dwelling of the same dimensions as the proposed dwelling but reduced by an improvement factor of 25 from 2006 standards 30 reduction in Scotland The SAP 2009 module calculates the TER using the data you enter about the pro posed dwelling and the default conditions specified in Appendix R of the SAP doc ument 2 Limits on design flexibility To ensure long term performance and to prevent ex cessive trade offs between fabric and plant Approved Document L1 sets out e maximum permissible fabric U values both worst case values and average values e maximum permissible air leakage rates e design limits for fixed building services The SAP 2009 module checks for compliance against all those standards 3 Limiting the effects of solar gain in summer The regulations require designers to make provision to avoid excessive internal temperatures as a result of solar gain Appendix P of t
127. ption of the layer this will appear on the print out e Thickness enter in millimetres mm e Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 00 MNs g You will also need to enter the bridging details section 7 3 CHAPTER 7 WORKING WITH MATERIALS 32 7 2 7 Vented cavities Vented cavities such as the batten space in a warm pitched roof are treated the same as clear cavities Identifying a cavity as vented allows some layers of the construction to be ignored for condensation risk analysis for further information see chapter 13 Vented cavities require the following information e Type select Vented cavity e Description type a description of the layer this will appear on the print out e Thickness enter in millimetres mm e Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 00 MNs g 7 2 8 Thermal insulation In order to comply with the requirements of European product standards for factory manu factured thermal insulation standards BS EN 13162 to BS EN 13172 JPA Designer rounds the thermal resistance values for thermal insulation down to the nearest 0 05 m K W To ensure the program does this correctly you must tick the is thermal insulation box for all layers of factory manufactured thermal insulation The original value for thermal resis tance will appear in the Edit material dialogue while the U value window will sho
128. r external environments you can change the standard values by typing new values into the text boxes To return to the default values for external environmental conditions click the Default button Condensation build up period Build up of condensate is assessed over a standard 60 day winter period that value can be changed using the Condensation build up period box CHAPTER 15 ASSESSING THE RISK OF INTERSTITIAL CONDENSATION 71 Internal conditions The internal temperature and relative humidity values will be deter mined largely by the building use You can enter design data or measured values in the four boxes or select one of the pre defined building use groups listed in the Building Use drop down box that will automatically set the temperatures and relative humidities to those defined in BS 5250 and BS 6229 Table 7 Once you have set the environmental conditions you can view the calculation results using the Results table subsection 15 2 3 and the Dewpoint graph subsection 15 2 2 Calculation options The BS 5250 1989 method does not allow for the removal of moisture by air movement however the standard suggests some indication of the effect of vented cavities can be obtained by assuming the air in the cavity is at outside conditions This can done by setting to zero the vapour resistances of the materials to the outside of a cavity For an explanation of the limitations of this technique please refer to BS 5250 1989 page 76 To use
129. r pressure testing requirements of Part L an air per meability value can be estimated from basic details of the construction and configuration of the dwelling 1 At Source of q50 value select Calculated The tab shows additional text boxes 2 Specify e the Type of construction e whether there is a draught lobby e the floor construction e the number of storeys 3 The software then calculates an air permeability rate based on the SAP defaults 18 2 Ventilation openings and sheltering In the Ventilation section enter details of the ventilation provision for the dwelling Use the boxes to enter the numbers of e Chimneys vertical ducts for combustion gases with diameter greater than 200 mm e Flues vertical ducts for combustion gases with diameter less than 200 mm These can be associated with the main heating system or with secondary or other heating e Extract fans and passive vents intermittent extract fans in bathrooms and toilets and passive vent systems e Flueless gas fires e Number of Sheltered sides to the dwelling Sheltered sides reduce the rate of air infiltration resulting from exposure to wind forces See section 2 5 of the SAP 2009 documentation for further guidance CHAPTER 18 VENTILATION Figure 18 2 The User defined mechanical ventilation dialogue User Defined Mechanical Ventilation eso Brand Model Duct type Flexible Rigid None Insulated duct Balanced or mechanical
130. rbines The electricity generated by a wind turbine on the building or within its curtilage grounds should be included in the SAP calculation To specify a wind turbine 1 Enter the Number of turbines 2 Specify the Rotor diameter in metres 3 Select the type of terrain which surrounds the dwelling 4 Enter the height of the hub of the turbine above the ridge of the roof in metres As part of the process of producing an EPC the software must calculate the likely benefit from installing a wind turbine You must therefore specify the Terrain type even if there is no wind turbine on the dwelling 26 3 Hydro electricity The electricity from hydro electric units can be included in the SAP calculation pro vided the total amount generated has been calculated and signed off by an appropriately qualified engineer The amount of electricity is entered in Hydro electric generation kWh year Where electricity is supplied to several dwellings it should be assigned in proportion to their floor areas See Appendix M4 of the SAP 2009 document for further details CHAPTER 26 RENEWABLES 132 Figure 26 2 Entering data on WWHR systems WWHR Database Manufacturer Shower Save v 1 World Solar Ltd a 35 Cobourg Road Montpelier Z Database date 29 10 2010 Bristol Database revision 302 BS6 5HT 0117 941 1663 n Available Lsananar dininrldanlar en sile Ref Manufacturer id Manufacturer Brand Model Qualifier ist Year Made Final Year Ma
131. re over garages parking bays or walkways Figure 17 1 The Dimensions tab Dimensions Yentilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Area Av Room Volume rr height rm ri Basement floor 0 00 0 000 0 00 Ground floor 1 162 61 x 2350 382 13 Ground floor 2 0 00 0 000 0 00 Exposed floor 0 00 0000 0 00 First floor party 115 02 x 2686 308 94 Second floor party 0 00 0 000 0 00 Third floor paty goo 0000 0 00 Fourth and other floors 0 00 0000 0 00 Total floor area 277 63 Dwelling volume 691 07 Total floor area r which is living area Le is accessible 41 30 or enter a fraction from the living room without opening doors or using stairs Total fixed lighting outlets 10 Low energy fixed lighting outlets 6 Fraction of low energy lighting Appendix L Front of dwelling faces Southwest z Application date 11 12 2010 ay 83 between 0 and 1 0 1488 CHAPTER 17 DWELLING DIMENSIONS 84 Floor areas are measured to the internal surfaces of the walls bounding the dwelling and should include all internal walls and built in cupboards accessible from the occupied area of the dwelling and all porches and conservatories which are heated and form part of the habitable space Exclude porches and conservatories which are unheated and thermally separated from the living space The average r
132. ressure test 2 For pre construction stage calculations enter the air permeability in the Design q50 box and set the radio buttons to as designed 3 For post completion calculations enter either the result of the air pressure test or the average test value for that type of dwelling and set the radio buttons to as built 4 If the dwelling has been pressure tested tick This dwelling has been pressure tested The DER calculation will use the Design q50 value If you do not tick that box the program will carry out the calculations using the q50 value plus two CHAPTER 18 VENTILATION 88 18 1 2 Using the assumed air permeability rate The only exemption to the requirement for air testing is for dwellings on small devel opments of one or two houses an air pressure test is not required provided the DER calculation is carried out using an air permeability of 15 m hm That high value re quires the performance of the rest of the building to be improved to meet the DER in order to off set the potentially poor air permeability To use an assumed air permeability 1 At Source of q50 value select Assumed value 2 Tick the Small development box which indicates the dwelling is part of a develop ment of one or two dwellings If you do not tick the box the dwelling will fail its compliance checks The Design q50 box is now fixed at 15 m hm 18 1 3 Using a calculated air permeability rate Where a dwelling is not subject to the ai
133. ription of the insulation You can also use the Products Database to enter details of the insulation by clicking on the button by the Insulation name box Further information on edge insulation may be found in BRE Information Paper 7 93 Horizontal edge insulation was commonly used to reduce thermal bridging and cold spots on larger floors which did not require a complete layer of thermal insulation However the lower U values now required by Building Regulations usually require a full layer of insulation making the use of horizontal edge insulation unlikely 11 Basement U values The methods for calculating U values of basements are set out in BS EN ISO 13370 The calculations for basement floors and walls are linked with each calculation requir ing data about the other element Because of this it is easier to calculate the basement floor U value first followed by the basement wall U value For a full explanation of the calculation methods consult BS EN ISO 13370 11 1 Basement floors To complete a basement floor U value calculation you will need to know The floor s Perimeter Area ratio P A e The thickness of the basement walls w metres The average depth from the external ground surface to the basement floor h me tres e The thermal conductivity of the ground lambda W mK see Table 11 1 and annex G of BS EN ISO 13370 To calculate a basement floor U value 1 Create a new U value calculation in th
134. rmal resistance for the specific configuration of the material this will usually be supplied by the manufacturer of the product A composite material requires the following information Type select Composite Description type a description of the layer this will appear on the print out e Thickness enter in millimetres mm Thermal resistance enter in m K W e Vapour resistance only required if you will be carrying out condensation risk analysis enter in MNs g 7 2 3 Fixed vapour resistance materials Some materials such as glass and metals have very high vapour resistances even when used in thin layers To enable the vapour resistance to be represented properly in the calculation you should enter these materials as fixed vapour resistance That will break the link between the vapour resistance and the thickness and so prevent the vapour resistance being reduced to an unrealistically low level by the minimal thickness For U value calculations materials with fixed vapour resistances behave the same way as normal materials you should only need to use material with fixed vapour resistances in condensation risk calculations A fixed vapour resistance material requires the following information CHAPTER 7 WORKING WITH MATERIALS 31 Type select Fixed vapour resistance Description type a description of the layer this will appear on the print out Thickness enter in millimetres mm e Thermal conductivity e
135. roof tick the Built up metal roof wall box and see section 9 2 for instructions on completing the calculation Otherwise leave the box blank Working with layers A U value calculation is built up by inserting layers which correspond to the different materials in the construction For example a U value calculation for a cavity wall would have a layer to represent each of e the outside surface resistance e the outer leaf of brickwork e the cavity e the cavity insulation e the inner leaf of masonry e the plaster finish e the internal surface resistance You can add layers to the calculation by inserting materials from the program s extensive database which includes data for generic materials and cavities as well as branded products from a number of manufacturers For many common constructions it is possible to insert all the layers from the database If you cannot find a material in the database then you can insert a blank layer and edit the information yourself 6 1 Inserting layers from the Products database The Products database contains a wide range of materials and cavities for use in U value calculations and is accessed using the Products Database window Figure 6 1 The Products Database window has three main parts e The Categories box which is used to select the type of material you want to use Categories of branded materials are shown in bold categories of generic materials in normal text and user cat
136. s for buildings Factory made mineral wool MW products Specification to BS EN 13172 2001 Thermal insulating products Evaluation of conformity There is one standard for each major thermal insulation material 59 CHAPTER 13 U VALUE CALCULATION OPTIONS 60 Figure 13 1 U value calculation options V Round down thermal resistance of Insulation products to the nearest 0 05m2K W E Set vapour resistance of layers above vented cavity to zero use this option with extreme caution see BS5250 1989 pg 76 for explanations amp limitations L 14 Editing the Products database To make U value calculations easier all JPA Designer U value modules include the Prod ucts database which provides the key data on generic construction materials cavities and branded products from a number of manufacturers This section explains how you can add frequently used products to the database The materials within the database are organised into three categories e Branded products from manufacturers shown in bold in the categories list e Generic materials shown in normal type in the categories list e User defined materials shown in italics in the categories list You can use all three types of material in Uvalue calculations and you can create edit and delete user defined categories and materials However you can not edit or delete branded or generic categories or materials To change the values of branded or generic materials you
137. short codes to the materials use a numbering system which matches the order in which you want the materials to appear Once you have assigned short codes you should click on the Sort on short code tick box in the Products database dialogue Figure 6 1 Part III Condensation risk 65 15 Assessing the risk of interstitial condensation The Uvalue Professional module calculates the risk of interstitial condensation forming at the interfaces of layers within an element The module which follows the recommen dations of BS 5250 uses the method of analysis set out in BS EN ISO 137887 For each interface within a building element the module determines e the amount of condensation or evaporation during each month e the maximum amount of moisture deposited e the accumulated mass of water compared to total evaporation during the year e the annual moisture balance The program can still perform analyses to the BS 5250 1989 method For information on using this method see The likelihood of condensation forming within a building element depends upon the hygrothermal properties of the materials thermal conductivity or resistance and vapour resistivities or resistance and the environmental conditions internal and external tem peratures and relative humidities Most of the information used by JPA Designer for calculating condensation risk is also used in the main body of the program for calculating U values The only additional
138. some constructions notably built up metal roof and wall cladding there are two sets of thermal bridges To enter details of a second bridge 1 Enter the details for the first bridge 2 Click the Second bridge box The Optional second bridge section is displayed 3 Select the bridging material from the Bridge description drop down The program sets the Bridge thermal conductivity If you are using an unusual bridging material you can enter your own description then enter the conductivity manually CHAPTER 7 WORKING WITH MATERIALS 34 4 Enter the Bridge width in mm The software uses the Non bridge width for the first bridge to calculate the Proportion bridged Non bridge width centre to centre distance bridge 1 bridge 2 5 When the bridging material is air you can use the Small airspace resistance button to calculate the thermal resistance of the bridge enter the thickness of the airspace and its width both in mm then click OK The resistance is displayed in the Bridge thermal resistance box 8 Correction factors Whilst the U value of an element depends largely upon the thermal properties of the layers of which it is composed there are a number of other factors which can affect the rate of heat loss Those are addressed by applying correction factors to the calculation There are correction factors for e Mechanical fasteners which penetrate insulation dUf section 8 1 e Air gaps in insulation la
139. st be produced in English EPCs in Wales may be issued in in English or Welsh e Location this is used in the overheating assessment and in SAP calculations for dwellings with space cooling Select the closest matching value from the drop down e Project type defines whether the calculation is for a new build existing dwelling or conversion An EPC can only be produced for a new dwelling as built e Related party disclosure overrides the default disclosure for EPCs for that calcula tion 3As of December 2010 Northern Ireland is still using SAP 2005 version 9 81 CHAPTER 16 JPA DESIGNER SAP 2009 MODULE 81 16 6 3 SAP calculation options The bottom of the Project Information dialogue contains several calculation options e Treat low e glass coating as soft soft low emission coatings allow less solar energy through glass than hard coatings and will therefore reduce the amount of solar gain however windows with soft coatings will have better U values than those with hard coatings Tick the box to apply this option to all low E glass in the calculation e Enter gross opaque element areas the SAP 2009 calculation uses the net areas of walls and roofs after the areas of openings doors windows and rooflights have been removed If you select this option you can enter the gross areas of walls and roofs and the program will determine the net areas by subtracting the areas of windows and rooflights If you change the s
140. st be set for every insulation layer To correct for air gaps 1 In the main U value window double click on the insulation layer The Edit material dialogue opens 2 Enter the appropriate value for dU in the dU box see Figure 8 2 then click OK Click the Help button to view the standard values for dU In many cases the default value of zero is appropriate 8 3 Rainwater cooling Inverted roofs or protected membrane roofs have some or all of the thermal insulation installed over the top of the waterproof membrane where it is restrained by aggregate or other ballast Rainwater falling on inverted roofs can percolate between insulation boards to the waterproofing membrane where it will increase the rate of heat loss The reduction in performance is represented within a U value calculation by the rainwater cooling correction factor dUr which is calculated from e The average rate of rainfall during the heating season p mm day e A drainage factor f which represents the fraction of p which reaches the water proofing membrane CHAPTER 8 CORRECTION FACTORS 38 Figure 8 3 Data for rainscreen cladding correction Wall Basement Flo J Rainscreen cladding Basement We x 0 020 n 2 770 e A factor for increased heat loss caused by rainwater flowing on the membrane x Wday m Kmm In JPA Designer that data is entered using the U value Construction dialogue As you have to indicate which layer is affected by th
141. surfaces The surface resistances used in the calculation are shown in the two Surface Resistance boxes The program automatically adjusts the surface resistances according to the type of element being considered section 5 1 and the emissivity of the surfaces using the values from BS EN ISO 6946 shown in Table 5 1 The default emissivity setting is high emissivity as virtually every commonly specified surface material has a high emissivity there is rarely any need to change the default Table 5 1 Thermal resistances Heat flow Element Internal resistance Rsi External resistance Rse Horizontal Wall 0 13 0 04 Upwards Roof 0 10 0 04 Downwards Floor 0 17 0 04 5 3 Light steel frame construction type U values for light steel frame structures have to be calculated using a special method which allows for the high thermal conductivity of steel The Light steel frame Construc tion Type section indicates whether the structure has a light steel frame and if so whether it is of warm or cold construction For non steel frame structures ensure Not a light steel frame construction is selected For instructions for calculating U values of light steel frame structures see 5 4 Built up metal roofing and cladding systems U values for built up metal roofing and cladding systems have to be calculated by a spe cial method which takes account of the thermal bridging effects of the rails and brackets If the calculation is for a built up wall or
142. t to be below the pasted layer 2 Select Edit gt Paste layer from clipboard from the menu bar alternatively click the Paste button on the tool bar or press lt Ctrl V gt The layer is inserted into the calculation above the selected layer To delete a layer 1 Click on the layer you wish to delete 2 Press lt Del gt 7 Working with materials The properties of layers are entered and edited in the Edit Material dialogue Figure 7 1 The dialogue enables you to set the basic characteristics of the material section 7 1 the type of material section 7 2 details of thermal bridging section 7 3 any air gap correction section 8 2 To edit the properties of a layer 7 1 Click on the layer to select From the menu bar select Edit gt Layer alternatively double click the layer or press lt Enter gt The Edit Material dialogue opens Amend the data for the layer and click OK Basic characteristics The Material section contains the basic data about the layer including Description the name of the material or a description which appears in the cal culation Short code used with the database to sort or enter materials not in general use Category not in general use Thickness cross sectional thickness of the layer measured in mm Thermal conductivity the rate of conduction heat transfer through 1m of the ma terial measured in W mK Sometimes referred to as the lambda value or
143. ta for the calculation is entered elsewhere in the SAP calculation from data so the only information required is the Effective air change rate You can either tick the Enter value box and enter a design air change rate in air changes per hour ach or use the Building and Window opening drop downs to set default values Figure 24 1 The Overheating tab Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling Py amp Alt Tech Location in country North East England Effective air change rate Enter value Building Window opening ach Two storey dwelling windows open upstairs and downstairs Cross ventilation possible v Windows open half the time v Night ventilation Cross ventilation can be assumed only if the at least half of the storeys in the dwelling have windows on opposite sides and there is a route for the A ventilation air Normally bungalows and two storey houses can be cross ventilated because internal doors can be left open Three storey houses or other situations with two connected storeys of which one is more than 4 5 m above ground level often have floors which have fire doors on to stairs that prevent cross ventilation Slightly open refers to windows that can be securely locked with a gap of about 50 mm Often this option will not give sufficient ventilation Dwelling has fixed air conditioning system Cooling System typ
144. ted space Ai an m 0 00 m e Pitched roof with horizontal ceiling Typically a cold roof with the insulation applied between and over the ceiling joists You must enter the pitch angle of the roof measured from the horizontal e Pitched roof with ceiling at rafter line A warm roof with the insulation in the plane of the rafters e Wall Any construction at an angle of more than 70 to the horizontal There is an option to enter data for the fixings in rainscreen cladding section 8 4 e Floor other than ground floor A floor over an open space e g a parking bay or an unheated space e g an enclosed garage e Solid ground floor A floor which is contact with the ground across its whole area such as groundbearing concrete slab e Suspended ground floor A floor with a ventilated space below the floor deck such as a beam and block floor or timber joist floor e Basement floor e Basement wall CHAPTER 5 CONSTRUCTION DETAILS 23 You may also enter a description for the element in the Description box or select one from the drop down list The description does not affect the calculation 5 2 Internal and external surfaces U value calculations include allowances for the effects of the thermal resistances of the thin layers of air on either side of the construction the surface resistances Those resis tances are affected by the direction of heat flow through the construction and the emis sivity of the exposed
145. ter If the dwelling has solar panels complete the Solar panel details section of the Water heating tab section 21 10 21 6 Boiler with thermal store In these systems a thermal store contains water heated by a separate boiler with domestic hot water provided by means of heat exchanger within the store Enter the following data for the store e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm CHAPTER 21 WATER HEATING 112 Figure 21 5 Data entry for a thermal store hot water system Source of domestic hot water Boiler with a thermal store v Hot water tank Storage tank insulation Hot water tank heater Volume I 210 0 Factory Thickness mm Single electric immersion heater Dedarediisi i Jacket 50 00 Dual electric immersion heater known KWh d Boiler feed From 2nd main heating system Thermal store type Summer immersion heater Heat pump heat 100 exchanger area Hot water only Integrated Hot water only boiler Y CPSU Thermal store in airing cupboard ls ri Thermal eo close coupled Yes No ves a Fuel y Thermal store or CPSU has seperate timer for heating store Cylinder in heated space Cylinder thermostat Override heat pump database values DHW vessel within micro CHP v Insulated primary v Separate timer for
146. the Database radio button CHAPTER 18 VENTILATION In all cases leave the box 100 draught stripping ticked 91 19 Walls roofs and floors The data on the opaque building fabric walls roofs and floors is used to calculate e the rate of conduction heat loss for the dwelling through those elements and the junctions between them e the thermal mass of the dwelling In JPA Designer you must enter the areas U values and values for each of the build ing elements section 19 3 and also enter details of the linear thermal bridging a the junctions between the elements and at the edges of openings section 19 4 The data is entered using the Walls roofs amp floors tab of the SAP Worksheet values dialogue lire 19 1 19 1 Defining building elements SAP 2009 requires data for a elements of the building fabric not just the heat loss ele ments You must enter data for e Exposed elements which separate the building interior from outside or from an unheated space or from an adjacent occupancy with a different heating pattern e Party elements which separate the dwelling from another space with a similar heat ing pattern e Internal walls and floors The data required for each element depends on its function the principle items being e Area the surface area of the element in m which should be measured to the boundaries of internal finished surfaces If you have chosen to use gross areas for opaque e
147. tion Database dialogue Mechanical Ventilation Database iii bests SS EOE Manufacturer Greenwood Greenwood Air Management Ltd a Greenwood House Brookside Avenue Database date 29 10 2010 Rustington 4 Database revision 302 West Sussex BN16 3LH Available zl AINNI VIAN Ref Manufacturer id Manufacturer 500138 20004 Brand Model Greenwood Air Management Ltd Greenwood Fusion HRV2 2009 current 5000 12 20004 Greenwood Air Management Fusion HVR1 feurent 500052 20004 Greenwood Air Management Ltd Greenwood HRV95 500005 20004 Greenwood Air Management Qualifier ist Year Made Final Year Made 2007 current Greenwood MVHR SOR current 7 n T Insulated duct Balanced or mechanical whole house ventilation Wet rooms excluding kitchen 3 Use the selected system e Database performance values from the Product Characteristics Database main tained by BRE 1 From the Source of mechanical ventilation parameters select Database 2 Click the Lookup button The Mechanical Ventilation Database dialogue opens Figure 18 3 Use the drop down to select the Manufacturer The list of available products appears Select a product by clicking on it Specify the number of Wet rooms excluding kitchen If the ductwork is insulated tick the Insulated duct box N DOD Oo A Click the Use the selected system button The dialogue closes and the sum mary of the system is displayed next to
148. tip will show the primary cause of failure see Figure 16 2 Click on the compliance zone opens the Compliance Checklist which lists the main criteria the SAP module tests and shows the status of the dwelling against each one The compliance check window is particularly useful when the dwelling has failed on one of the secondary criteria such as the efficiency of heating controls or excessive losses from the hot water cylinder You can use the tabs at the bottom of the Compliance Checklist to view e the SAP worksheet e the TER worksheet e the DER worksheet e the Overheating risk assessment Once you have reviewed the results you can then make changes to the calculation 136 29 Outputting SAP results You can print the results of SAP calculations or produce a PDF file which is ideal for emailing For both print and PDF you can select which parts of the results you want to include in your output e SAP worksheet the results of the SAP calculation e TER worksheet the results of the TER calculation for the notional dwelling e DER worksheet the results of the DER calculation for the actual dwelling e FEE worksheet the results of the FFE calculation e Input data a reflection of the information you have entered into the software e Regulations checklist shows the compliance status of the dwelling in a checklist which follows the format in AD L1A e Summer overheating results of the overheating assessment e E
149. tor for the type of ground use 1 5 for clay or silt 2 0 for sand or gravel and 3 5 for homogeneous rock Where some or all of these details are unknown you should use the default values If you edit the values then want revert to using the defaults click the Default button CHAPTER 10 GROUND FLOOR U VALUES 53 Table 10 1 Windshield factor Location Example Fw Sheltered City centre 0 02 Average Suburban 0 05 Exposed Rural 0 10 10 1 5 Edge insulation Installing insulation horizontally around the perimeter of the floor edge insulation will reduce thermal bridging at the perimeter and improve the floor s overall thermal performance Edge insulation can be e Horizontal insulation installed around the perimeter of the floor in the same plane as the floor e Vertical insulation installed at the perimeter of the floor at right angles to the plane of the floor Use the radio buttons to select the type of edge insulation present then enter the details of the insulation if there is no edge insulation leave the rest of this section blank e Internal and external surface resistances use the default values of 0 140 m K W and 0 040 m K W e Insulation thickness board thickness in mm e Insulation conductivity the lambda value in W mK e Insulation name e Insulation width or depth depending upon whether the insulation is laid horizon tally or vertically the board width in mm e Description optional desc
150. ts grounds can be included in the SAP calculation however where a turbine supplies electricity to more than one dwelling or is connected to a development by private wire the electricity can not be included in the SAP calculation see Appendix M of the SAP 2009 document for further details 130 CHAPTER 26 RENEWABLES 131 Figure 26 1 The Photovoltaics and Alternative Technology tab Dimensions Ventilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling PV amp Alt Tech Photovoltaics Peak kw Pitch Direction Overshading 1 0 45 30 degrees South Modest 20 60 sky blocked Mi 2 0 00 v X Heavy gt 80 sky blocked v Special features new energy saving technologies Appendix Q Description of new technology Energy saved kWh year 0 00 Type of fuel saved X Energy used kWh year 0 00 Type of fuel used X Other Appendix Q Technologies D New N Edt Delete Additional allowable electricity generation for box ZC6 kg r year 0 000 Hydro electric generation kwh year 0 00 Micro wind turbines on the building or within its curtilage So WWHRS Lookup Number of turbines 0 Rotor diameter m 0 000 Terrain type pinata FGHRS Lookup Height of turbine hub above ridge 0 000 FGHRS PV Module of roof m Peak kiw Pitch Direction Overshading ooo v Heavy gt 80 sky blocked x 26 2 Wind tu
151. ubsection 22 3 1 1 e additional items such as load or weather compensator boiler interlock recom mended and if the central heating pump is in a heated space affects internal gains 22 3 1 1 Boiler efficiency The efficiency of the boiler or other heat source can be entered in one of three ways To use the PCD 1 Select the Select from the boiler database radio button 2 Click the Select boiler button The BRE Boilers Database dialogue opens Figure 22 3 3 Select the Boiler manufacturer from the drop down The program then displays the list of available boilers 4 Scroll down the list and click on a boiler to select it You can scroll sideways to view the details of each boiler such as its efficiency and configuration The program only shows boilers which match the criteria you specified using the drop downs on the Primary heating tab As a manufacturer does not necessarily offer a boiler in every category the database may not display any boilers CHAPTER 22 PRIMARY HEATING 122 Figure 22 3 Using the Product Characteristics Database to set the boiler efficiency BRE Boilers Database Database date 29 10 2010 Database revision 302 Available boilers Baxi Potterton 8556 Baxi Potterton 8871 Baxi Potterton 8866 Baxi Potterton 9206 Baxi Potterton 8867 Baxi Potterton x Boiler manufacturer se gc9 X Ref Manufacturer Original Manufacturer Brand Inset 3 50 5 GC No 44 075 07 78 0 Baxi P
152. ulation can be a time consuming process JPA Designer has two tools to make the process quicker by enabling you to copying certain parts of the window data for one window to other windows in the dwelling or project The only data items copied to the windows are e Glazing e Double glazing air gap CHAPTER 20 OPENINGS 106 e Frame type e g window value To copy values between openings 1 Open one window in the Edit Doors Windows amp Rooflights dialogue Figure 20 3 2 Adjust the data for the window if necessary 3 Click one of two buttons e Copy these values to all this building s windows clicking this button sets the window data for all windows in the dwelling to that the currently viewed window e Copy these values to all the buildings in this project clicking this button sets the window data for all windows in all the dwellings in the JPA Designer project to that the currently viewed window 4 JPA Designer displays a confirmation dialogue Click Yes to carry out the changes or No to ignore them The operation cannot be un done automatically 21 Water heating SAP considers the amount of energy used to heat domestic hot water such as that used for bathing laundry and dishwashing The demand for hot water is based upon the floor area of the dwelling Data on domestic hot water is entered using the Water heating tab of the SAP Worksheet values dialogue The first step is to select the type of water heat
153. ulation results You can of course purchase additional modules at any time 1 2 Getting help This manual has been designed to provide easy reference to all the features of JPA De signer The manual uses the following conventions e lt angled brackets gt for keys on the computer keyboard e g the lt Enter gt key e the sign indicates you should hold down one key while pressing another e g lt Alt F gt means hold down the lt Alt gt key while pressing the lt F gt key e Bold type indicates parts of JPA Designer s screen displays e g the Ventilation rate dialogue e Menu gt option indicates the option in the menu on the program s menu bar e g Se lect Edit gt Primary heating system means select the Primary heating system option from the Edit menu This manual uses the following special terms e Dialogue dialogue box a small window which displays boxes or buttons for en tering data e Radio button a set of two or more related buttons you can only select one at a time CHAPTER 1 INTRODUCING JPA DESIGNER 4 e Tick box a box which shows whether or not a particular setting is on ticked or off not ticked e Text box an area on a dialogue in which you can type words or numbers e Drop down a box on a dialogue which can be expanded to show a number of pre set options usually by clicking an arrow on the right hand side of the box There are many functions of JPA Designer which can be accessed using
154. urer instead of relying on the default values in SAP 2009 The means of heating the hot water must be specified using the Hot water tank heater radio buttons e Single electric immersion heater a single coil electric immersion heater in the tank e Dual electric immersion heater a dual coil electric immersion heater in the tank this will usually be associated with an off peak tariff in which case tick Off peak electricity immersion heaters e Boiler feed this indicates a heat source which also provides space heating such as an oil or gas boiler or a default efficiency heat pump There are additional boxes to indicate the hot water is provided by the second main heating system a default efficiency heat pump is supplemented by an immersion heater in the summer CHAPTER 21 WATER HEATING 109 Figure 21 2 Entering an instantaneous hot water heater Source of domestic hot water Instantaneous water heating at point of use Fuel Electric Bulk LPG Mains gas Propane e Hot water only boiler a dedicated unit which supplies domestic hot water only Use the drop down to select the type of boiler then specify the Fuel Use the four lower boxes to indicate whether e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e the primary pipework between the boiler and tank is insulate
155. viding domestic hot water only This system represents hot water provision by a community heating scheme which does not provide the space heating The system can have several heat sources To specify such a system e Set the Source of domestic hot water to Community heating domestic hot water only Figure 21 7 e Set the Heat Sources for the system subsection 21 9 1 e Set the method of charging for the hot water supply using the drop down this will either be a flat rate charge for the heating or will be linked to hot water usage e Set the distribution method using the drop down e If there is a solar panel linked to the system enter its details section 21 10 e If there is a hot water tank or cylinder within the dwelling tick DHW cylinder within dwelling additional data boxes will be displayed for Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 CHAPTER 21 WATER HEATING 116 Figure 21 8 Setting a heat source for community heating hot water Community Heating Heat source Heat source Boilers x Fuel Heat from boilers mains gas v Heat fraction 1 Efficiency 90
156. w the rounded value For additional information on the rounding feature and instructions on how to turn it on or off see chapter 13 7 3 Thermal bridging Thermal bridges are formed where the material in a layer is interrupted by a second ma terial with different thermal conductivity for example the insulation in a timber framed wall is interrupted bridged by the timber studs In most cases thermal bridging increases heat loss through the bridged layer hence the commonly used term cold bridge The effect of thermal bridges which occur regularly throughout a layer repeating thermal bridges has to be included in U value calculations by added the details of the thermal bridge to each bridged layer using the Edit material dialogue Thermal bridging is either e one dimensional e g timbers running in one direction or e two dimensional e g mortar joints which run vertically and vertically The information required for setting thermal bridging includes e The thermal conductivity of the bridging material for common bridge materials this can be set along with the Bridge description CHAPTER 7 WORKING WITH MATERIALS 33 e The width of the bridging material Bridge width and horizontal distance between bridges Non bridge width For two dimensional bridging you will also need to know the vertical distances between bridges Non bridge height The software uses those values to determine the Proportion bridged However for some
157. will only be those appropriate for the Opening type For example if you have set the Opening type to Window the Opening within drop down will show only walls Similarly if you chose Rooflight then Opening within will show only roof elements e Glazing Use the drop down to select the type of glazing considering the number of leaves of glass the gas within the cavity or cavities and any low emissivity low E coating Even if you go on to enter a manufacturer s U value and or g window value you must still make a selection here to set the correct parameters for daylight e Double glazing air gap Use the radio buttons to select one of the default values or enter your own value If the gap is greater than 16 mm select Other and enter a width in the box CHAPTER 20 OPENINGS 104 Figure 20 3 The Edit Doors Windows amp Rooflights dialogue Edit Doors Windows amp Rooflights Opening type Window X Opening within Walls External walls X Glazing Double glazed air filled low E En 0 2 hard coat z Double glazing air gap Frame type 6mm Other Wood Metal 4mm thermal break Metal 20mm thermal break 12mm 12mm mm PYC u Metal 8mm thermal break Metal 32mm thermal break 16mm Metal no thermalbreak Metal 12mm thermal break Use user definedframe factor user definedframe factor 0 00 U val meK 1 7 Source of U value eee 170 Default g window value Light transmittance is determined by Area n 1 44 BM onuhecturer B
158. y the building will be facing then select Unspecified Make sure the Front elevation here is the same one you selected in the Building faces drop down in the Dimensions tab e Overhang Features such as balconies or brise soleil which overhang a window will reduce the amount of sunlight falling on it in summer and so reduce the risk of overheating If there is such an overhang enter its Width and Depth both in mm The depth is measured from the outer edge of the overhang to the external face of the glazing e Blinds curtains and external shutters These will also reduce the amount of solar gain and the risk of overheating in summer Use the drop down to select the type of shading and then set the Fraction of daylight hours closed Appendix P of the SAP documentation gives some guidance of reasonable assump tions for these occupant determined values e Overshading The extent to which the sky is obscured by trees and neighbouring buildings will determine the amount of sunlight and solar flux passing through the glazing Set the degree of overshading using the radio buttons Select Average or unknown if you cannot establish the amount of overshading The SAP guidance disallows the use of the Very little overshading category for new dwellings as it does not take account of conditions likely to apply over the whole life of the building 20 2 Editing multiple openings Changing the specification for openings once they have been added to a calc
159. y of recovering a deleted calculation To delete a calculation 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Delete selected item JPA Designer asks you to confirm the deletion 3 Click Yes to delete the calculation or No to abandon the deletion If you click Yes the calculation is removed from the project 3 10 Merging projects To help you re use SAP and U value calculations JPA Designer allows you to merge all the calculations in an existing project into the currently open project This can be useful if you have a number of standard calculations stored in different projects which you need to bring together for a particular job To merge calculations from one project into another 1 In Project Manager open or create the project you want to receive the calculations 2 From the menu bar select File gt Merge a project from disk into this Project The Open dialogue appears 3 Select the file which contains the calculations and click Open JPA Designer adds the calculations to the current project and lists them in the Project Manager win dow You can now edit them without affecting the original project CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 15 3 11 Importing and upgrading calculations JPA Designer can convert SAP calculations carried out under one version of SAP to a later version of SAP You may need to do this when the Building Regulations compliance
160. yers dUg section 8 2 The effect of rainwater cooling on inverted roofs dUr Brackets in rainscreen cladding systems section 8 4 e Insulation compression in built up metal roofing and cladding dUp section 9 2 The correction factors are calculated separately from thermal resistances of the layers and are then added to the raw U value however if the correction factors total less than 3 of the raw U value then they are ignored in calculating final U value The values for correction factors are displayed in the main U value window next to the final U value It is also possible to adjust the result of a U value calculation to account for the effect of having an unheated space to the cold side of the construction section 8 5 8 1 Mechanical fasteners Metal fasteners which penetrate layers of thermal insulation reduce the effectiveness of the insulation that effect has to be included in U value calculations using the correction factor dUf Common constructions which require the correction are e Cavity walls with partial or full fill cavity insulation e Warm pitched roofs where insulation is laid over the rafters and restrained by coun terbattens fixed back to the rafters Note that the calculation method for mechanical fasteners has changed from version 4 04b1 build 025 onwards and now uses the method in BS EN ISO 6946 2007 35 CHAPTER 8 CORRECTION FACTORS 36 Figure 8 1 Data entry boxes for the mechanical faste

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