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JPA Designer User Manual v6 - for U

1. i i 1 a Floors Ground Floats Windows doors amp rooflights Average U value 22 0 of floor area 16 35 22 69m Overheating risk Not significant 0 Total carbon dioxide emissions 2514 0 kgryear SAF B 81 80 59 El value 81 67 HLP 1 42 Figure 6 2 Primary cause of failure shown at the Compliance zone Total carbon dioside emissions 2697 5 kgryear SAP C 80 79 53 El value 80 33 HLF 1 42 Figure 6 3 Buttons on the SAP toolbar Era Designer C Documents and Settings Huw Evans My Do l ioj xi File Edit view Help T Project Manager E iU E afa gi Ere 23 456 78 91011 12 Pe CHAPTER 6 SAP 2005 MODULE 60 7 Compliance zone This shows green for a pass and red for a fail If the dwelling is failing to comply hovering your mouse over this zone will bring up a tool tip giving the primary cause of failure see Figure 6 2 Double clicking on the zone will open the Compliance Checklist The tool bar buttons are Figure 6 3 a A WwW 10 11 12 6 7 Return to project manager window Print results Return to project manager window Enter project information opens the SAP Project Information dialogue Dwelling dimensions opens the Dwelling dimensions tab of the SAP Worksheet Values dialogue Ventilation information opens the Ventilation information tab of the SAP Wor
2. Note the Area is entered in metres square but the values for Width and Height are entered in millimetres mm 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 elevation 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 way 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 over CHAPTER 6 SAP 2005 MODULE 73 heating 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 assumptions for these occupant determined values e Overshading The extent to which the
3. Built up metal roof vall Correction for mechanical fasteners Hep Alpha foo mt Thermal conductivity o go Vink Fasteners per 0 00 off Fasteners cross 0 000 mm of fasteners square metre sectional area Elements separating heated and small unheated spaces see ISO 6946 sec 5 4 Area of all components between bo m p z bpe coma 0 00 m inside amp unheated space Ai 4 2 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 Construction details dialogue Figure 4 1 which accepts details of e Element type see fubsection 4 2 1 Internal and externals surfaces see subsection 4 2 2 Light steel frame construction see Subsection 4 7 1 Built up roofing or cladding see Subsection 4 7 2 Corrections factors for fasteners and unheated spaces see Subsection 4 5 5 To enter data 1 From the menu bar select Edit gt Construction type The Construction details dialogue 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 CHAPTER 4 U VALUE CALCULATIONS 17 4 2 1 Element type JPA Designer recognises several types of element which have to be treated differently in the calculati
4. lv Insulated primary fv Cylinder thermostat i Separate timer for domestic hot water Required by the Building Regulations e Use the four lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e the primary pipework between the boiler and tank is insulated e there is a thermostat in the hot water tank e there is a separate timer for the domestic hot water Those features indicated by asterisks are required by Building Regulations the dwelling will fail if they are not present If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O 0p 6 12 8 MicroCHP This represents hot water provided by a domestic combined heat and power microCHP sys tem Enter the following data e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 e Indicate whether there is a summer immersion heater using the tick box If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O O CHAPTER 6 SAP 2005 MODULE 80 Figure 6 21 Hot water settings for
5. 0 00 Wek i 1 From the menu bar select Edit gt Construction type The U value Construction dialogue opens 2 In the Correction for mechanical fasteners section either use the drop down to select one of the standard fastener types see or enter the individual items of data for the fasteners To view the default values click the Help button 3 If the calculation is for a light steel frame construction you must indicated which layer is bridged by the fasteners using the drop down box which is displayed if you select steel frame construction 4 5 2 Air gap correction Air movement through and around an insulation layer can reduce its thermal performance To allow for that the U value calculation should include a correction factor dUg which is calculated by the software on the basis of the amount of air movement possible as represented by the coefficient 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 possible on its warm side dU 0 04 W m K A value for dU must be set for every insulation layer To correct for air gaps CHAPTER 4 U VALUE CALCULATIONS 30 1 In the main U value window double click on the insulation layer The Edit
6. To enable the vapour resistance to be represented properly in the calculation you should select the fixed vapour resistance category for such materials 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 nor mal materials you should only need to use material with fixed vapour resistances in conden sation risk calculations A fixed vapour resistance material requires the following information e Type select Fixed vapour resistance Description type a description of the layer this will appear on the print out Thickness enter in millimetres Thermal conductivity enter in W mk The program calculates the Thermal resistance in m K W Vapour resistance enter in M Ns qg 4 4 2 4 Membranes Membranes such as vapour control layers or breather membranes are treated as having no thermal resistance and have no effect on U value calculations they only affect 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 M Ns g 4 4 2 5 Clear cavities The thermal resistance of a cavity is not calculated from its thickness although it is affected by the direct
7. 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 The Dwelling dimensions tab requires the following data CHAPTER 6 SAP 2005 MODULE 64 Figure 6 7 The Dimensions tab Area Av Room Volume rr height rn inr Easement floor ooo 0 00 Ground floor 1 40 04 x 2400 96 10 Ground floor 2 00 ooo 0 00 Exposed floor ooo ooo 0 00 First floor 4004 x 2750 110 11 Second floor ooo o oo 0 00 Third and other floors oo x joo 0 00 Total floor area 80 08 Dwelling volume 206 21 Total floor area m which iz ving area ie is accessible ieee or enter 4 fraction from the living room without opening doors or using stairs 16 82 between 0 and 1 0 21 Fraction of low energy lighting Appendix L enter 0 if there is no low energy lighting 0 300 Building faces South Application date 31 03 2007 e The floor area in m and the average room height for each storey 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 It is helpful to enter the values against the appropriate line of the table but not essential 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 are over
8. 10 U value calculation with a variable layer Layer Thickness Thermal Thermal Vapour Vapour Pitch Bridge Conductivity Resistance Resistivity Resistance Details mm W mK m K AW MNs gm MNs g Brick outer leaf E 103 0 0 770 0 134 50 00 mala 17 3 M Cavity gt 25mm rc 0 160 0 00 4 Extruded polystyre 50 0 0 027 1 850 1000 00 50 00 5 Breather membran 0 50 E Variable layer 500 00 Polythene 1000 g 8 Plasterboard BS5 ea 0 170 0 074 60 00 0 75 gt Variable layers 5 Wrap text Insulation resistance rounded down Layer Thickness Thermal U value dU Bridge Conductivity Combined Details ram WmK Method Mel JPY BW Rock fibre 855250 50 0 0 27 Glass fibre BS5250 50 0 0 040 0 275 0 000 Polyisocyanurate BS5250 50 0 0 030 0 248 0 000 Extruded polystyrene BS5250 50 0 0 027 0 236 0 000 5 Expanded polystyrene BS5250 50 0 0 035 0 264 0 000 4 6 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
9. 3 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 see Figure 4 2 The Products Database window has three main parts CHAPTER 4 U VALUE CALCULATIONS 19 Figure 4 2 The Products Database window Products Database d x Categories Products Recticel xtra 2000 al Asbestos cement sheeting amp substitutes 055250 Renotherm oe P ecking Plyywoo BOEreM OD Fibreboard 535250 Thermalite Foamed glass BS5250 Blockyyork Hardboard 5655250 Brickwork Medium Density Fibreboard 825250 Plasterboard 855250 PYT rigid sheet VWaterboard Woodwaoaol slabs AS55250 Cavities Composite boards Concrete Flooring Insulation loose Only show My database Sort on short code Edit databaze Short Code Next Search Add to constuction Construction Outside surface resistance Inside surface resistance HL Clase e The Categories box which you use to select the broad category of material you want to use Categories of branded materials are shown in bold categories of generic materials in normal text and user categories in italics see fection 4 12 for information on adding your own materials 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 constructi
10. Cancel 6 20 Outputting SAP results You can print the results of SAP calculations 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 For both print and PDF you can select which parts of the results you want to include in your output SAP worksheet the results of the SAP calculation TER worksheet the results of the TER calculation for the notional dwelling DER worksheet the results of the DER calculation for the actual dwelling Input data a reflection of the information you have entered into the software Regulations checklist shows the compliance status of the dwelling in a checklist which follows the format in AD L1A Summer overheating results of the overheating assessment Summary certificate one page showing the SAP rating for the dwelling This option is not available greyed out if the dwelling does not comply with regulations Energy 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 Predicted Energy Assessment PEA the energy assessment required at the design stage In order to produce a PEA tick both Energy Performance Certificate and Predicted En ergy Assessment To print the results 1 Select File gt Print from the menu bar or click the Print bu
11. Dwelling failed first pressure test Second measured 50 rrym h noo Number of flueless gas fires 0 Second pressure test date fe Humber of sheltered sides 20 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 fram loft Mechanical whole house extract ventilation Decentralised mechanical whole house extract ventilation oe e o Tie 88 Source of mechanical ventilation parameters f Default 2 of windows amp doors draught stripped i 00 0 Enter 100 for new dwellings which are to f User defined _ Enter details comply with the Building Regulations f Database Lookup Johnzon Staley CE180 Premier 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 m hr e Allow the software to calculate the infiltration rate from the construction type and build ing size This method is not valid for demonstrating compliance under building regula tions To use pressure test data 1 In the Source of q50 value section select Pressure test 2 Enter the design pressure test value in the Design q50 box the value should not exceed 10 3 For design stage calculations set the
12. EN 13162 2001 Thermal insulation products 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 CHAPTER 4 U VALUE CALCULATIONS 46 Figure 4 20 Calculation Options dialogue Calculation Options X Sek vapour resistance of layers above vented cavity to zero use this option with extreme caution see 655250 1989 pg 76 for explanations amp ces 4 12 Editing the Products database To make U value calculations easier all JPA Designer U value modules include the Products database providing you with 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 must work on a duplicate clone of the c
13. Professional module calculates the risk of interstitial condensation forming at the interfaces of layers within an element The module which follows the recommendations 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 Becton 920 this manual The likelihood of condensation forming within a building element depends upon the hy grothermal properties of the materials thermal conductivity or resistance and vapour resis tivities or resistance and the environmental conditions internal and external temperatures 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 information required is the vapour resistivity resistance data for materials 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 Uvalue calculation 2 Ensure vapour resistance properties have been defined for each layer use the Edit
14. SAP 9 70 To convert a SAP 9 70 calculations 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 7 2001 to SAP 9 80 2005 3 JPA Designer converts the calculation and adds it to the project with SAP version 9 80 appended to the calculation name The 9 80 calculation can then updated to 9 81 by ticking the SAP version 9 81 box in the Project Information dialogue in the SAP module see When you open the 9 80 version of the calculation you will be prompted to add some addi tional pieces of information e g whether or not the dwelling has been designed with accred ited construction details 3 11 Merging projects 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 window 3 12 Duplicating calculations If you want to prepare a calculation which
15. Solar panel section of the Water heating tab see 1 SUD O ON 6 12 5 Multi point gas water heater or heat exchange built into a gas 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 e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box CHAPTER 6 SAP 2005 MODULE 77 Figure 6 19 Data entry for a thermal store hot water system Source of domestic hot water gt Hot water tank volume 7 gt Storage tank insulation J pee Water tank heater C 110 litres Other volume l i Foam Thickness mm Single electric immersion heater 160 lites p7 fe lace 50 o0 Cual electic immersion heater 210 litres i Hof Boiler feed E Summer immersion heater gt Thermal store type J Manutacturer s declared loss factor i Hot water only Declared loss factor if f Integrated known kw hda Mle the Thermal Store close coupled ie Yez tf No CPSUT hermal store in airing cupboard i Yes i No Thermal store or CPSU has seperate timer for heating store e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Manufacturer s declared loss factor Use the box to enter a
16. Type select Vented cavity Description type a description of the layer this will appear on the print out Thickness enter in millimetres e Thermal resistance enter in m K W Vapour resistance cavities have a vapour resistance of 0 M N s g 4 4 2 8 Thermal insulation In order to comply with the requirements of European product standards for factory manufac tured 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 resistance will appear in the Edit material dialogue box while the U value window will show the rounded value For additional information on the rounding feature and instructions on how to turn it on or off see section Subsection 6 7 3 CHAPTER 4 U VALUE CALCULATIONS 26 4 4 3 Thermal bridging Thermal bridges are formed where the material in a layer is interrupted by a second material 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 occurring regularly throughout a layer repeating thermal
17. a module by entering the supplied user name and key code The user name appears on all print outs from the software To enter the key code for a SAP module 1 Start JPA Designer by selecting the program from the Start button Start gt Programs gt JPA Designer gt JPA Designer JPA Designer opens with the Project manager window From the menu bar select Insert gt SAP 9 81 calculation JPA Designer shows the De scription dialogue Click OK to accept the default description and close the Description dialogue JPA Designer shows the new SAP calculation in the Project manager window Double click on the new SAP calculation The SAP module opens with a warning pop up about demonstration mode Click OK to dismiss the pop up warning The User Registration dialogue appears see igure 2 2 Enter the user name and the key code for the SAP module exactly as given then click OK Please note O zero You will need to overwrite both the default user name and the key code You can now start entering data for the SAP calculation If you see an incorrect key code error message you should re enter the user name and key code To enter the key code for a U value module CHAPTER 2 PROGRAM BASICS 7 fa Start JPA Designer by selecting the program from the Start button Start gt Programs gt JPA Designer gt JPA Designer JPA Designer opens with the Project manager window From the menu bar select Insert gt U
18. and power CHP component tick the is CHP box and set the CHP heat to power ratio value e f the hot water cylinder is within the dwelling tick the box e Use the drop down to select the Heat distribution system If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O O 6 12 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 documentation 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 e 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 overshading 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 CHAPTER 6 SAP 2005 MODULE 82 Figure 6 24 The primary heating tab Group Central
19. at any interface where the two lines touch see Figure 5 2 The orientation of the Dewpoint graph is determined 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 The dewpoint temperature is the temperature at which saturation vapour pressure would occur Any lower temperature would result in condensation CHAPTER 5 CONDENSATION RISK ANALYSIS 54 5 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 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 highest 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 Yo
20. 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 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 constructions you will 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 virtually all 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 7 dimensional or 2 dimensional The Edit material dialogue now shows the Thermal bridge section
21. click OK 4 Anew category will be created containing copies of the original materials To delete a 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 only in user categories 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 see fection 4 4 4 Click OK The new product is added to the category CHAPTER 4 U VALUE CALCULATIONS 48 Figure 4 22 The Search Database dialogue xi Search for Direction Forward Back i Ignore case Find nert FL Close To edit an existing user defined material 1 Select the product you wish to edit Click the Edit product button The Edit material dialogue opens a 3 Make the changes in the Edit material dialogue see Section 4 4 4 Click OK The product information is updated To clone an existing product 1 Select the product and click the Clone product button A copy of the product will be inserted in the category 2 Click on the clone to edit it To delete a product only in user categories 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 Searc
22. declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 e Use the four lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e the primary pipework between the boiler and tank is insulated tick box only displayed if boiler feed is selected e there is a thermostat in the hot water tank e there is a separate timer for the domestic hot water Those features indicated by asterisks are required by Building Regulations the dwelling will fail if they are not present If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O 6 12 6 Boiler with thermal store This system represents a thermal store which contains water heated by a separate boiler Do mestic hot water is provided by means of heat exchanger within the store Enter the following data e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Hot water tank heater use the radio buttons to select the heat source If you select an immersion heater an additional tick box is displayed for selecting off peak electricity CHAPTER 6 SAP 2005 MODULE 78 e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor su
23. for the first bridge to calculate the Proportion bridged Enter the Non bridge width in mm 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 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 Mechanical fasteners which penetrate insulation dUf see Subsection 4 5 1 Air gaps in insulation layers dUg see fubsection 4 5 2 The effect of rainwater cooling on inverted roofs dUr see Brackets in rainscreen cladding systems dUxx see Subsection 4 5 4 Insulation compression in built up metal roofing and cladding dUp see fubsection 4 7 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 the calculation 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 calculati
24. garages parking bays or walkways 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 not heated and are clearly divided from the living space The average room 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 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 CHAPTER 6 SAP 2005 MODULE 65 Figure 6 8 The Walls Roofs and Floors tab Enter Htb value manually Hth Deta
25. 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 calcu lation Once you have finished entering data you can print off the results or make adjustments to the data 6 4 Preparing to carry out a SAP calculation Before starting a SAP calculation you should ensure you have all the input data including e dwelling floor area e U values and areas of external elements you can carry out the U value calculations using one of the JPA Designer U value modules e whether or not approved construction details have been used or have data on linear thermal bridging e U values areas and orientation of windows doors and roof lights CHAPTER 6 SAP 2005 MODULE 58 the proposed water heating system the proposed primary and secondary heating systems the ventilation strategy the design or achieved air permeability details of any photovoltaic cells or other low carbon technology 6 5 Carrying out a SAP calculation Once you have gathered all the necessary data about the dwelling you can carry out the SAP calculation The main steps are Create a new SAP calculation see section 3 6 Open the calculation in the SAP module see Section 3 7 Enter the Project Information see fection 6 7 Open the SAP Worksheet Values dialogue and enter the dwelling data see fection 6 9 Check the compliance status on the main SA
26. has five sections e Floor type The choice of floor type will determine how other parts of the dialogue appear Floor dimensions e Deck Suspended ground floor details Edge insulation CHAPTER 4 U VALUE CALCULATIONS 38 Figure 4 14 The Ground Floor Details Dialogue Ground Floor Details xi Floor type Floor dimensions Suspended Ground Floor Details for SO 13370 Solid Pa O 00000 Calculate A E r m 0 0015 him 0 300 w m 0 300 f Suspended block amp beam Perimeter im o oo Ley Prk i r00 fu 0 050 C Suspended Area n 0 00 lambda 11 500 VF rts 5 000 Default P Help Edge insulation f None f Horizontal oes Internal surace resistance PK 0 140 External surface resistance mek Ay 0 040 Insulation al name Insulation thickness mm oo o Insulation conductivity Mamk 0000 Insulation width mm o Description PO X Cancel 4 8 1 1 Floor type There are three types of ground floor 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 Fl
27. heating systems with radiators or underfloor heating z Sub group Gas boilers including LPG 1998 or later ki system Condensing including combis with automatic ignition E Boiler 1 fuel Gas maing z Heating controls Delayed start thermostat programmer g Heat emmiters Boiler efficiency c Radiators f Select from the boiler database C Underfloor pipes in concrete slab Baxi Potterton Combi 80 HE Plus GC No 41 075 16 Efficiency f Underfloor pipes in insulated timber floor 90 80 f Underfloor pipes in screed above insulation Use only for 1998 or later boilers Make Model Pump in heated space Declared SEDBUK value 0 00 Boiler has load or weather compensator Keep hot facility Keep hot fuel Boiler Interlack f None Timed Un timed t Marn fuel Elec f Use default value Flue Draught reer fe Unknown f Unknown Separated conservatory with feed heater M Onen Dwelling has fixed air conditioning system m rata f Natural Dwelling is in smoke control area f Fanned Fanned flue 6 13 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 is usually not based on individual room heaters Data on the primary heating system is entered using the Primary heating tab Figure 6 24 6 13 1 The main primary heating systems There are seven main groups of primary heating system the following secti
28. is very similar to an existing calculation in a project you can duplicate the calculation and then make your changes to the duplicate To duplicate a calculation 1 In the Project Manager window select the calculation by clicking on it once 2 From the menu bar select Edit gt Duplicate ttem The Description dialogue opens 3 Type a name for the duplicate calculation and click OK A copy of the original calcula tion is added to the project You can now work with the duplicated calculation in the usual way CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 13 3 13 Renaming calculations To change the name of a calculation 1 In the Project Manager window select the calculation by clicking on it once Its name will be highlighted 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 cal culation 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 14 Deleting calculations Calculations can be deleted from JPA Designer projects Warning there is no way of recovering a deleted calculation To delete a calculation 1 In the Project Manager window select the calculation by clicking on it once 2 From the menu bar select Edit gt Delete selected item JPA Designer as
29. openings dialogue New Doors Windows amp Rooflights f l xX Opening type SA Opening within Bs Glazing bl Double glazing air gap Frame type C Emm f Wood C Metal 4mm thermal break Metal 20mm thermal break f 12mm f PyC u f Metal 8mm thermal break f Metal 32mm thermal break Other mm 1 mm f Metal no thermalbreak f Metal 12mm thermal break U value sme Source of U value ara E Light transmittance i determined by glazing type Area m Daah W lawie f BFAC data single double or triple so make sure you selec the corect glazing type Description p Opening Orientation mR window size o i i idh Heit ron Overh df Left front Right front T ee widthimm Depth mm Blinds curtains amp external shutters Let C cem Ne o i O e Overshading Leftback C Right back f Heavy 80 2 sky blocked f More than average 60 80 sky blocked Back f Average or unknown 20 60 sky blocked f Top roof f Wer lithe 20 sky blocked xX Cancel f Unepecified 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 value Only enter a g window value in here if it is BFRC certified e Area You can enter the 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
30. sky is obscured by trees and neighbouring build ings 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 6 12 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 heating system using the Source of domestic 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 e Community heating scheme providing domestic hot water only 6 12 1 Hot water storage tank This represents hot water which is heated by the central heating boiler or immersion coil then stored in a tank ready for use Enter the following data e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volu
31. the element can be entered in the Descrip tion 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 6 10 2 Linear thermal bridging SAP 2005 takes account of the increased rate of heat loss at the junctions between elements by calculated the total rate of heat loss from linear thermal bridges HTB There are two ways of entering the necessary data both of which are found on the Walls Roofs amp Floors tab Further information on the treatment of linear thermal bridging can be found in Appendix K of the SAP documentation 6 10 2 1 The simplified method JPA Designer can calculate an approximate value for HTB by multiplying the total area of the exposed elements floors walls and roofs by a factor y Where the dwelling is designed using accredited construction details y 0 08 otherwise y 0 15 in the TER calculation y 0 11 This simplified method will give higher rate of heat loss compared to the full calculation method To use the simplified method in JPA Designer e From the Detailing radio buttons select either New dwelling details are accredited con struction details or Details are not accredited construction details 6 10 2 2 The full calculation method The rate of heat loss through one metre of linear thermal bridge is described by its psi value Y The heat flow rate for a bridge is determined b
32. 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 CHAPTER 4 U VALUE CALCULATIONS 41 Figure 4 16 Entering data for basement floors Basement floor dimensions Basement Detalls for 150 13370 Pv 0 00000 Calculate it Iv him 0 300 w m 0 300 Perimeter m 0 00 Area me 0 00 lambda 1 500 Default e Insulation conductivity the lambda value in W mK e Insulation name e Insulation width or depth depending upon whether the insulation is laid horizontally or vertically the board width in mm e Description optional description 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 4 9 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 requiring 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 4 9 1 Basement floors To complete a bas
33. 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 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 CHAPTER 5 CONDENSATION RISK ANALYSIS 53 Figure 5 2 Dewpoint graph for a roof with condensation predicted at the interface between layers 5 and 6 FB Dewpoint Graph Results to show fe Winter of Summer Always on top Temperature Dewpoint Outside Pe i Scale 1 4 4 s A Internal External Inside 2 0 RH 86 5 5R H Rsi 0 10 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 5 2 2 The Dewpoint graph The Dewpoint graph plots the predicted temperature through the construction with dewpoint temperature for the worst month Condensation is predicted
34. 6 in W m you can do this as a separate calculation using JPA Designer e Fw the wind shield factor see fable 4 2 e V the average wind speed at 10m above ground level in m s e Lambda the conductivity factor 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 Table 4 2 Windshield factor Location Example Fw Sheltered City centre 0 02 Average Suburban 0 05 Exposed Rural 0 10 4 8 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 Horizontal edge insulation was commonly used to reduce
35. 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 section Subsection 4 7 1 4 2 4 Built up metal roofing and cladding systems U values for built up metal roofing and cladding systems have to be calculated by a special method which takes account of the thermal bridging effects of the rails and brackets If the calculation is for a built up wall or roof tick the Built up metal roof wall box and see section for instructions on completing the calculation Otherwise leave the box blank 4 3 Working with layers A U value calculation is built up by inserting layers which correspond to the layers of material in the proposed construction For example a calculation for a cavity wall would have a layer to represent the thermal performance of the outer leaf of brick another to represent the cavity another for the cavity insulation and so on There will also be layers for the surface resistances see section Subsection 4 2 72 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 some 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 4
36. Heating Compliance guide applies Only tick this box if the boiler is exempt e SAP 9 81 post April 1st 2008 after April 2008 SAP calculations must be carried out using the SAP 9 81 methodology so this box must be ticked Dwellings which received building control approval before April 2008 should still be assessed using SAP 9 80 However to produce an EPC for such a building you will have to convert it from 9 80 to 9 81 by ticking the box 6 8 Entering project data The data for the SAP calculation is entered using the SAP Worksheet Values dialogue To open the SAP Worksheet Values dialogue at the start of a calculation click on the Dwelling dimensions button on the toolbar or select Edit gt Dwelling dimensions The dialogue is organised by a series of tabs each covering one part of the SAP input data The tabs are listed at the top of the dialogue in the same order as they appear in the Edit menu CHAPTER 6 SAP 2005 MODULE 63 Figure 6 5 The Tabs on the SAP Worksheet Values dialogue SAP Worksheet Yalues l Dimensions Walls roofs floors Openings Water heating Primary heating Secondary heating Ventilation Overheating PY amp Alt Tach Figure 6 6 The buttons on the SAP Worksheet Values dialogue OF Cancel Apply Help 531 Next gt gt see Figure 6 5 If your screen is not wide enough to display all the tabs you can use the arrow keys to scroll left or right along the list To move between sect
37. 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 CHAPTER 4 U VALUE CALCULATIONS 27 For two dimensional bridging enter the Non bridge height in mm If necessary change the Proportion bridged value to a standard value The software adjusts the Bridge width accordingly Set the bridge thickness by selecting Follows material thickness or selecting Fixed at then entering thickness in mm In 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 2 3 4 5 Enter the details for the first bridge Click the Second bridge box The Optional second bridge section is displayed 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 Enter the Bridge width in mm The software uses the Non bridge width
38. JPA Designer manual JPA Technical Literature Contents Rue Gna ues ee adeoeeeaaus peed aess 2 P rogram Dasic eee ee ee eee eee eee ee 2 MSANIUON ocx 2 4 oe a wae ew ow EG ee eee Zs Jpaaung JEAIWCSIONGN ww is a a ae SS te Gr we we 6 ow Be ee eS Z4 JMiNsStANNE JPA DESIBNEI e 2 p oe soets oe wR Pee ee eS PRARBR SES PE GSH RRS Se 2 0 Unlocking modules with key codeg ooa Serr rr res eee eee eee ee ee ee ee ee eee ee ee ee ee ee oh vee eee oe EE oe ee oe eee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee D530 Adding calculations to a project 2 ee ee ee eee ee ee ee ee ee ee ke ds hw Bh Ge Be oe OE we ae ee WO me D S mporting existing calculations into a project aaa ee Cre onverting SAF 9 Calculations to SAF 9 0 Calculationg Lone eae ee ew Mw ee ee ee oe ey ee we ee ee ee ee ee ee ee ee Renaming Calculationg 2 2 0 ee ee ee T4 Deleting calculationg 0202 eee ee ee Sou GG eye nee eae eee pe eeooteaus 4 J value calculations 4 Jvalue DIOjeCUIMONMAUNOM 24 66 6haae4 itsa tereded 4 onstruction VDetall 2 2 ee 4 VVOFRITIG WHY AV OTS oi ot a ee wt ee we RS Se Re Ge a ew 4 4 Working with materialg 8 84a bw ow ae ee eee ee N N O AUUAUVU W 15 15 16 18 21 CONTENTS NS orrection tactor O Using variable layer omplex Calculation round tloor U value i pasement U value 1Q Outputting result alculation option diting the Froducts da
39. Northern Ireland e Start up 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 fection 2 3 Logo and signature The Logo and signature tab lets you set the following options 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 print outs 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 Email tab 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 t
40. P window see and make any necessary changes Produce print outs or PDF files of the calculation results see Section 6 20 Save your project see fection 3 4 We also recommend you have a daily back schedule for your data 6 6 The SAP window The SAP window lets you access the SAP menus and tool bar and displays the results of calculations see Figure 6 1 The main features of the window are 1 2 The menu bar The SA toolbar the buttons give direct access to key program features and to the tabs on the SAP Worksheet Values dialogue 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 The CSH level is only a guide for the carbon emissions component of the Code it is not a full evaluation against the Code Fabric U values limits and averages Overheating risk assessment Carbon dioxide emission and SAP results CHAPTER 6 SAP 2005 MODULE 59 Figure 6 1 The JPA Designer SAP window Fle Edit view a E Project Manager ie Conservation of Fuel amp Power in Dwellings SAP 9 61 Detached house O TER DER Achieved U value fwierek worst area weighted Opaque elements Pitched roofs insulated between joists Pitched roots insulated between rafters Pitched roofs with integrated insulatiog a A Fat moi eee Sloping walls skilling cambcels
41. U value calculation as if that layer replaced the place holder layer in the main calculation To use a variable layer 1 In the main U value window click the layer below the position for the variable layer 2 From the menu bar select Insert gt Variable layer The program inserts a variable layer in the calculation and displays the Variable layer pane see Figure 4 10 3 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 variable layer materials no U value appears in the status bar You can only have one variable layer in a calculation CHAPTER 4 U VALUE CALCULATIONS 33 4 7 Complex calculations 4 7 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 additional 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 combin
42. Uvalue Construction dialogue see BUbsection 4 5 1 Use the first drop box to indicate which layer is bridged by the mechanical fasteners then enter the fasteners dimensions and spacing The alpha coefficient is 0 8 for warm constructions and 1 6 for cold hybrid constructions CHAPTER 4 U VALUE CALCULATIONS Figure 4 11 Built up metal wall or roof cladding Buit up metal rooteall cladding using rail amp bracket spacer SCl P31 2 W Built up metal rootiwall Rail spacing mm 1 200 0 W Insulation is compressed by inner or outer sheet Rail width ail width mm 40 0 Sheet profile width mm 90 0 Sheet profile centres mm 600 0 Layer bridged by rail Second insulation layer j ytrudegd polystyrene 055250 Rock fibre D55250 z sheet profile depth mm 20 0 E truded polystyrene D55250 Figure 4 12 The Small Airspace Resistance Calculator Small Airspace Resistance C x See EN 150 6946 annex 6 For more details Airspace thickness in 400 direction of heatFlows d Airspace width b rnin 100 Airspace resistance im KiW 0 233 4 7 2 Twin skin metal cladding and roofing 34 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 P312 that method takes account of e The bridging effects of the rail and the air spaces ar
43. a microCHP system Source of domestic hot wate Storage tank insulation Oop Thickness mm f Jacket 50 00 Hot water tank volume C110 litres Other volume I 160 litres f 60 0 f 210 litres Manufacturer s declared loss facto Declared loss Factor if known kM hdan Micro CHP summer immersion heater Figure 6 22 Settings for a community heating scheme which supplies only domestic hot water Source of domestic hot wate Community heating scheme domestic hot water only Hot water tank heate Single electric immersion heater Dual electric immersion heater Boiler feed P Summer immersion heater Storage tank insulation oH Erem Thickness mm Jacket 50 00 Hot water tank volume C110 litres Other volume il 160 litres f 60 0 f 210 litres Manufacturer s declared loss Facto Declared loss factor if known kW Heday Hot water only community heatin Fuel used by community scheme alaa Sed te Me Ue eae l a EE Efficiency of community boiler jo 000 is CHP CHF heat to power ratio 0 000 heat pump or CHP 2 Hot water cylinder in within dwelling Heat distribution system Maing piping system installed before 1991 not pre insulated medium high temp distribution 120 1740 C full flow syste 6 12 9 Community heating scheme providing domestic hot water only This system represents hot water provision by a community heating scheme which does not pro
44. ab The Other tab lets you set the default thermal conductivity of the screed in a beam and block floor construction and define where the preview window opens on screen 4 U value calculations JPA Designer offers three U value modules e Uvalue Standard calculates U values for walls roofs and intermediate floors using the combined method BS EN ISO 6946 e Uvalue Enhanced has all the functionality of Uvalue Standard and also calculates U values for ground floors BS EN ISO 13370 e Uvalue Professional has the functionality of Uvalue Enhanced and also performs con densation risk analysis using the methods set out in BS EN ISO 13788 2002 and BS 5250 1989 Appendix D Uvalue calculations are carried out in the Uvalue window by e 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 e Defining the materials which make up the element e Adding any correction factors see fection 4 5 You can test the effect different materials have on the thermal performance of the element by using the variable layer feature see fection 4 6 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 modules You ca
45. ails 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 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 30 mm profile with 130 mm actual depth of insulation use a value of 130 30 100 mm CHAPTER 4 U VALUE CALCULATIONS 36 Figure 4 13 Inputting data for rainwater correction Element Type P pe LOOl PS Layer tx 0 040 p 3 000 I inverted a eee 15 Enter the details for the brackets in the Correction for mechanical fasteners section Enter the thermal conductivity of the brackets usually 60 W mK for 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 4 7 3 Inverted roofs In inverted roofs often known as protected membrane roofs some or all of the thermal insu lation is applie
46. allation file from the internet 1 Using your web browser e g Firefox or Internet Explorer go to our web site at www techlit co uk and go to the downloads page 2 Right click on the link labelled download JPA Designer and select Save link as for Fire fox or Save target as for Internet Explorer 3 Use the Save As dialogue to choose the folder in which to save jsetup981 exe and click OK we recommend downloading the file to the Desktop The download is about 9 0 MB 4 Once the download is complete follow the instructions in section Bubsection 2 2 3 2 2 2 Finding the installation software on the JPA Designer CD ROM 1 Insert the JPA Designer CD ROM into your computer s CD drive 2 Within Microsoft Windows open My Computer and view the contents of the CD ROM 3 The installation file jsetup981 exe is in the main folder of the CD ROM 4 Once you have found the file follow the instructions in the next section of this manual 3 CHAPTER 2 PROGRAM BASICS 4 2 2 3 Running the installation program To install JPA Designer 1 Double click on the file jsetup981 exe The WinZip Self Extractor opens 2 Click Setup 3 After a few moments the Set up program will open The screen tell you which version of JPA Designer is being installed Click Next to continue with installation 4 The Choose Destination Location screen lets you select the folder into which JPA De signer will be installed We recommend you accept the default f
47. and Terrace NEWCASTLE UPON TYME get UPARAN clear IPR Fost Code Phone Fax E mall Add to clients Edit clients list Reference certificate Date 23 Feb 2008 Plotedrawing Building type Detached house 1 County England or Wales Location iateamettalgecman W Treat low E glass coating as soft Me Enter gross opaque element areas Boller comes under the exception procedure allowed in Part L i SAP 9 81 post April 1st 2008 Inher wf OF M Cancel 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 project details 1 In the SAP 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 You can also add plot numbers and drawing references to link the calculation to a particular dwelling on site 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 our guide to issuing EPCs CHAPTER 6 SAP 2005 MODULE 62 6 7 2 Dwelling details The Project Information dialogue also contains general information about the dwelling in cluding the type of building the co
48. as a ratio between 0 00 and 1 00 For all other schemes leave this at 0 00 12 Use the Heat distribution system drop box to specify the type of pipes used to circulate the hot water 6 13 1 7 Electric underfloor heating This section is for 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 6 13 2 Additional data There are some items of additional data which the software collects for producing the EPC Three items can appear on the Primary heating tab e Separated conservatory with fixed heater Tick this box if the dwelling has a thermally separated conservatory see SAP guidance section 3 3 3 for the definition of thermally separated which has a fixed heater within it e Dwelling has fixed air conditioning system Tick the box if there is a fixed air condi tioning system in the dwelling 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 only permit ted for an exempted appliance For further information on smoke control areas see www smokecontrolareas co uk Tick the box if the dwelling is within a smoke control area 6 13 3 The Boiler Efficiency Database The Boiler Efficiency and Products Characteristics Database contains
49. as solar panels complete the Solar panel section of the Water heating tab see SUD O UD 6 12 2 Instantaneous water heating at point of use For a system which heats the water at the point of use as it is required you need only select the Fuel using the radio buttons 6 12 3 Combination boiler Combination boilers provide heating and hot water they may be instantaneous with no stor age at all or they may contain small primary or secondary storage tanks Use the Combination boiler type radio buttons to select the type If you have selected nstantaneous there is no further data to enter For a boiler with a primary or secondary store enter the following data CHAPTER 6 SAP 2005 MODULE 75 Figure 6 15 Data for an instantaneous water heater M Source of domestic hot water Instantaneous water heating at point of use Fuel Electic Bulk LPG Maing gat Propane Figure 6 16 Hot water options for combination boilers Source of domestic hok waker Combination boiler z Hot water tank volume Storage tank insulation q Combination boiler type 110 ites Other volume l Foam Thickness mm Instantaneous f 160 litres j e Jacket 50 00 Storage with a primary store 210 Jacket a ee A U eed ee ree fe 210 litres Storage with secondary store gt Manufacturer s declared loss factor Declared loss Factor if known kM hdan e Hot water tank volume use the radio but
50. ategory 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 4 21 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 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 CHAPTER 4 U VALUE CALCULATIONS 47 Figure 4 21 The Edit Database dialogue Edit Database l Categories Brickwork Plaster gypsum 855250 Cavities Plaster lightweight 055250 Render 555250 Composite boards Concrete Flooring Insulation loose Insulation slab Membranes Metals and glass Miscellaneous My category Render and plaster Roofing Sail Sand and Gravel Stone Timber Edit category Clone category Ti Delete category BG Mew category EA Edit product Clone product a Search database Ti Delete product b Mew product FL Close To clone a category 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
51. ating system which provides space and water heating and can heat at least 30 of the dwelling should be treated as the primary heating system If there is no system which provides space and water heating the primary heating system should be that which can heat the greatest part of the dwelling If there is still doubt select the system which supplies useful heat to the dwelling at lowest cost Where there are two central heating systems the SAP calculation should be carried out using data on the system which heats the largest part of the property See SAP 2005 Appendix A for further guidance on the treatment of primary and secondary heating systems 6 14 Secondary heating A secondary heating system provides additional heating for the dwelling Compliance calcu lations presume a proportion of the space heating demand is provided by a secondary heating system the proportion is defined in table 11 of the SAP 2005 documentation Data on secondary heating is specified using the Secondary heating tab Figure 6 26 The choice of secondary heating system can have a significant effect on the DER Approved Doc ument L1A paragraph 28 contains guidance on secondary heating in DER calculations To enter secondary heating data 1 Set the Group drop down to Room heater systems If you select None the software will presume electric panel heaters 2 Select the Sub group 3 Select the System 4 Select the secondary heating Fuel If the solid fuel roo
52. ave 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 characters 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 4 11 Calculation options The European standards for factory produced thermal insulation products set out the require ments 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 rounding 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 see Figure 4 20 1 Tick the Round down thermal resistance box to toggle rounding on or off 2 Click OK to accept the change gt The series runs from BS
53. block is in two identical halves it may be enough to consider only one half 2 In Project Manager select Insert gt Dwelling SAP v9 81 2005 calculation gt Multiple dwelling The Description dialogue opens Figure 3 3 3 Type a name for the calculation in the Description dialogue e g Block B all flats and click OK The new calculation is added to the project 4 In Project Manager double click on the new calculation The Multiple dwellings SAP window opens Figure 7 1 5 Click on a dwelling in the Available SAP v98 Dwellings pane to select it then click the Add button The dwelling is transferred to the Dwellings in this multiple dwelling pane 6 Repeat the previous step until you have all the dwellings you need in the right hand pane If you need to remove a dwelling from the multiple dwelling calculation simply select it and click the Remove button You can print the results of multiple dwelling calculations and produce PDFs by following the procedures in fection 6 20 7 3 Extensions to existing dwellings The energy efficiency of extensions and conversions is addressed in Approved Document L1B where the primary compliance method is an elemental approach JPA Designer can be used to carry out the required U value calculations CHAPTER 7 OTHER SAP CALCULATIONS 99 In some circumstances where it is not possible to achieve the required U values you can use two SAP calculations to demonstrate compliance The first cal
54. correction factor dUf is calculated from e The alpha coefficient which represents the direction of heat flow Standard values are 6 for wall ties between masonry leaves 5 for roof fixings and 1 6 for steel framed walls e The thermal conductivity of the fastener typically 17 W mK for stainless steel and 50 W m K for mild steel e The number of fasteners per square metre e The cross sectional area of the fastener typical double triangle ties have a cross sec tional area of 11 3 mm 2 based on 3 8 mm diameter To enter data for mechanical fasteners CHAPTER 4 U VALUE CALCULATIONS 29 Figure 4 6 Selecting values for common configurations Layer bridged by mechanical fasteners in Light steel frame construction or aoa brackets in built up metal roof yall cladding Correction for mechanical fasteners z Help Vall with cavity fill SS double triangle ties 900 x 450 cntrs walls upto 15m with 90mm leaves Vall with cavity fill SS vertical twist ties 900 x 450 centrs walls upto 15m with 90mm leaves Vall with cavity fill mild steel double triangle ties 900 x 450 cntrs walls upto 15m with 90mm leaves Vall with cavity fill mild steel twist ties 900 x 450 critrs walls upto 15m with 90mm leaves Warm pitched roof insulation over rafters Conventional warm flat roof roof membrane secured with mechanical fasteners Fi Figure 4 7 Correcting for air gaps in insulation layers Ajr gap correction delta U
55. culation should be for the dwelling with an extension which complies with the elemental U value standards whilst the second shows the dwelling with the proposed extension If the proposed calculation has a lower DER than the compliant then the extension will have a lower heat loss rate than that required by the regulations As this methodology is not explicitly described in the approved document you should consult the Building Control body to agree its acceptability
56. cy 6 13 1 5 Other space and water heater systems There is currently only one heating system in this category electric ceiling heating The only data required is that from the primary heating drop boxes CHAPTER 6 SAP 2005 MODULE 85 Figure 6 25 Data entry for community heating schemes Group Community Heating Scheme hi Community heating Heat from boilers gas h Boiler 1 fuel Gas mains Boiler 2 fuel Gas mains Heating controls hanging system linked to community heating use programmer E Community heating Community heating boiler 1 efficiency 72 30 00 Fraction of heat from CHP unit 0 00 Electrical efficiency of CHP Boiler 1 heat fraction 0 750 Tyre R 0 0000 Community heating boiler 2 efficiency 2 96 00 Heat efficiency of CHP unit ray OLS 0 0000 Heat distribution system Mains piping system installed before 1991 not pre insulated medium high temp distribution 120 740 C full flow syste 6 13 1 6 Community heating scheme Community heating schemes use central heat generators usually boilers to heat water which is then circulated through pipes to supply space heating and hot water to individual dwellings Heat may also be provided by Combined Heat and Power CHP systems which will also generate electricity In rare cases a community heating scheme may provide hot water but not space heating We recommend you consult Appendix C of the SAP documentation before specifying a c
57. d 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 tion 4 5 3 Because you have to indicate which layer is affected by the 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 dialogue opens 2 In Element type select Flat roof Insert an Element description then click OK 3 Add the layers of the construction see fection 4 3 4 Open the U value construction dialogue again and in Element Type tick the Inverted box The dialogue shows three data boxes see Figure 4 73 5 Enter the values for f x and p and in the drop down select the layer of extruded polystyrene insulation XPS Click OK XPS is virtually the only insulation material suitable for inverted roofs 4 8 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 desc
58. d floor timbersteel frame walls plasterboard on timber steel stud internal partitions Solid floor masonry external walls intemal insulation masonry separating walle with plasterboard on dabs plasterboard on timber steel stud internal partitions Solid floor masonry external walls cavity fill or external insulation with plasterboard on dabs masonry separating walls with plasterboard on dabs plasterboard on timber steel stud internal partitions Solid floor masonry external walls cavity fill or external insulation with plasterboard on dabs masonry separating walls dense plaster plasterboard on timber steel stud internal partitions Solid floor masonry external walls cavity fill or external insulation with dense plaster masonry separating walls with plasterboard on dabs plasterboard on timber steel stud internal partitions a Thermal Mass Parameter E 000 Dwelling incorporated fixed air conditioning 6 16 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 document overheating risk depends on the predicted amount of solar gain and the thermal mass of the dwelling Because JPA Designer takes most of the information for the calculation from the SAP data there are only three items to enter in the Overheating tab see Figure 6 29 e Building region selecting the region from the
59. dard 60 day winter period that value can be changed using the Condensation build up period box Internal conditions The internal temperature and relative humidity values will be determined 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 and the Dewpoint graph see fection 5 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 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
60. des the official SAP guidance JPA Designer is a modular program the current modules are SAP 2010 calculates SAP ratings to the SAP 2005 specification and tests new dwellings for compliance with the requirements of Part L 2006 Uvalue Standard no longer supported Uvalue 2010 adds ground floor U value calculations to ISO 13770 to the range of Uvalue Standard Uvalue Professional 2010 analyses the risk of interstitial condensation to ISO 13788 and carries out elemental U value calculations to ISO 6946 and ISO 13770 The following modules are still included in the program but have limited validity e SAP calculations to the SAP 9 70 2001 specification which was valid for use on dwellings begun before April 2006 in England and Wales before November 2006 in Northern Ireland or before May 2007 in Scotland e SAP RI includes three compliance methods for the Republic of Ireland Elemental Overall Heat Loss and Heat Energy Rating which were valid until December 2006 1 CHAPTER 1 INTRODUCTION 2 e Nondwell tests buildings other than dwellings for compliance against the Elemental standards of Part L 2002 no longer valid For instructions on using those modules please consult version 4 of the JPA Designer manual which is available from our web site www techlit co uk downloads htm The key code s you receive when you purchase the program will unlock the modules you have bought Other modules on the program will be
61. drop down sets the mean summer tem perature with higher mean temperatures more likely to result in overheating e Effective air change rate a higher air change rate will reduce the risk of overheating 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 e Thermal mass parameter this represents the amount of heat which the building fabric can absorb Dwellings with higher thermal mass absorb more heat and are less likely to overheat than those with lower thermal mass You can either use the list to select the construction which best matches that of the dwelling or enter a calculated value in the Thermal Mass Parameter box 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 If appropriate tick the Dwelling incorporated fixed air conditioning This does not affect the SAP calculation but will appear on the Energy Performance Certificate CHAPTER 6 SAP 2005 MODULE 93 Figure 6 30 The Photovoltaics and Alternative Technology tab Photovoltaics Photovoltaics peak ky 0 00 Pitch Direction Overshading f Horizontal f South C Heavy 280 2 sky blocked 30 degrees C SESW Significant 60 80 sky blocked f 45 degrees C East West E Modest 20 80 sku blocked BO Scopes C NENW pace Sp Lele ened C Nort
62. e 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 tip will show the primary cause of failure see Figure 6 2 Click on the compliance zone to open the Compliance Checklist which lists the main cri teria the 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 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 There are separate spreadsheets for SAP 9 80 and SAP 9 81 make sure you use the appropriate version CHAPTER 6 SAP 2005 MODULE 95 Figure 6 31 SAP Sections To Print dialogue Sections To Print x Sections to print Printer options SAP Worksheet Summer Overheating Printer setup I C TER Worksheet M Summary Certificate DER Worksheet Printer margins C Input Data W Energy Performance Certificate Printer Font Regulations Checklist We Predicted Energy Assessment a
63. e facility can save time on 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 1 Double click on the opening in the list in the Openings tab The Edit Doors Windows and Rooflights dialogue opens Alternatively you can select the opening then click the Edit button 2 Make your changes then click OK To delete an opening 1 Select the opening in the list in the Openings tab 2 Click the Delete button A confirmation dialogue appears 3 Click Yes to delete the opening or No to retain it CHAPTER 6 SAP 2005 MODULE 71 Figure 6 12 Changing the U values of several openings at the same time Change Multipe U values x Enter a new U value For all the selected items Cancel To change multiple U values This function enables you to revise the U values of several openings at once 1 d Select the first of the openings by clicking on it once Hold down the lt Shift gt key and click the last of the openings Click the Change U value of selected openings button The Change Multiple U values dialogue opens see Figure 6 12 Enter the new U value then click OK The U values are changed 6 11 1 The Windows Doors and Rooflights dialogue The Windows Doors and Rooflights dialogue is used to enter the data about the openi
64. ed 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 Designer is the same as for any other element but with the following modifications 1 Identify the element as light steel framed and enter the framing details 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 see for guidance 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 com pleting the Correction for mechanical fasteners section in the
65. element from the list The element type is used to for checking permissible U values and for setting openings The available types are Pitched roofs insulated between joists Walls Ground floors Floors floors other than ground floors such an exposed floor over a parking area Sloping walls skillings cambceils used for room in the roof constructions Flat roofs Pitched roofs with integrated insulation e g SIPS Pitched roofs insulated between rafters warm roofs Vehicle doors Basement floors CHAPTER 6 SAP 2005 MODULE 67 Figure 6 9 The Element dialogue la Enter areas INcluding doors windows rooflights Area including glazing rr U value pank Effective thermal resistance fo Heb Link to this U value calculation att uri eaben 3586 Fe Ferimeter im Cost E r Description X Cancel Basement walls 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 Area enter the area of the element in m2 which should be measured to the boundaries of internal finished surfaces If y
66. ement floor 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 e The average depth from the external ground surface to the basement floor h metres e The thermal conductivity of the ground lambda W mK see and annex G of BS EN ISO 13370 To calculate a basement floor U value 1 Create a new U value calculation in the Project Manager window and open it for edit ing CHAPTER 4 U VALUE CALCULATIONS 42 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 see igure 4 16 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 4 3 Thermal conductivity of the ground Category Description Thermal conductivity W mK 1 clay or silt 1 5 2 sand or gravel 2 0 3 homogeneous rock 3 5 4 9 2 Basemen
67. er from the calculation removes the layer but keeps the details on the clipboard 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 Ctr1 xX gt The layer is removed 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 Ctr1 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 want 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 Ctr1 v gt The layer is inserted into the calculation above the selected layer 4 3 4 Deleting layers To delete a layer 1 Click on the layer you wish to delete 2 Press lt Del gt 4 4 Working with materials The properties of layers are entered and edited in the Edit Material dialogue see Figure 4 4 The dialogue enables you to set e Basic characteristics of the material see Subsection 4 4 1 e The type of material see Subsection 4 4 2 e Thermal bridging see Subsection 4 4 3 e The air gap correcti
68. esistance 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 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 analysis enter in MN s gm e The program calculates the Vapour resistance in M N s g 4 4 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 ther mal resistance which is supplied 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 e Type select Composite e Description type a description of the layer this will appear on the print out e Thickness enter in millimetres e 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 CHAPTER 4 U VALUE CALCULATIONS 24 4 4 2 3 Fixed vapour resistance materials Some materials such as glass or metals have very high vapour resistances even when used in thin layers
69. f you have site specific data you can type values directly into the table Click OK to accept the data and close the dialogue 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 e In summary form in the Results table e As a graph in the Dewpoint graph The data is taken from Meteorological data 1961 1990 published by the World Meteorological Office CHAPTER 5 CONDENSATION RISK ANALYSIS 52 Table 5 1 Internal relative humidity classes Relative humidity Class Building type 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 80 95 60 70 45 55 5 Special buildings e g laundries breweries gt 95 gt 70 gt 55 Figure 5 1 ISO 13788 Condensation table 3 150 Condensation Table O x Click on an interface to view the build up figures Airspace between ties and roofing felt ine resistance lt W Vapour open membrane Cavity gt 25mm roof CIBS Cavity gt 25mm roof CIES 4 Membrane Membrane Cavity gt 25rmm root CIES Cavity gt 25mm roof CIBS 7 Insulation Insulation Plasterboard BS 5250 Malan 35 17 Tard 99 55 114 47 118 93 113 53 122 69 134 16 155 42 189 57 230 72 274 06 Print form Close 5 2
70. g calculations To close a calculation and return to the Project manager window click the Project manager button on the tool bar 3 9 Importing existing calculations into a project JPA Uvalue and JPA SAP were the precursors to the JPA Designer Uvalue and SAP modules You can import calculations carried out in those older programs into JPA Designer To import a JPA Uvalue calculation into JPA Designer 1 From the menu bar select File gt Import JPA Uvalue file into this project The Open dialogue opens 2 Select the file you want to import and click Open The Description dialogue opens 3 Enter a description for the calculation and click OK 4 The calculation will be added to the list in the Project Manager window You can now open the imported calculation by double clicking on it To import a JPA SAP v2 calculation 1 From the menu bar select File gt Import JPA SAP file into this project The Open dialogue opens 2 Select the file you want to import and click Open The Description dialogue opens 3 Enter a description for the calculation and click OK 4 The calculation will be added to the list in the Project Manager window You can now work on the imported calculation by double clicking on it CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 12 3 10 Converting SAP 9 7 calculations to SAP 9 8 calculations There may be occasions when you need to carry out a SAP 9 80 or SAP 9 81 assessment on a dwelling originally assessed under
71. h button The Search Database dialogue opens see Figure 4 22 2 In the Search Database dialogue enter the text you want to search for and the direction 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 dialogue When you have finished working on the database click the Close button to return to the main U value window CHAPTER 4 U VALUE CALCULATIONS 49 4 12 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 see Subsection 4 3 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 constructions To sort the database by short codes you must first assign 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 see Figure 4 2 5 Condensation risk analysis The Uvalue
72. h f None or very litte lt 20 sky blocked Special features new energy saving technologies 4ppendix O Description of new technology Energy saved kw h year 0 00 Type of fuel sawed Energy used kw h year 0 00 Type of fuel used Micro wind turbines on the building or within its curtilage Humber of turbines ooo Rotor diameter m 0 000 Terrain type Low rise urban suburbar Height of turbine ooo hub above ridge of root rm 6 17 Photovoltaics and micro wind turbines SAP 2005 takes account of the contribution of Photovoltaic panels and wind turbines to the energy consumption of the dwelling and the resultant C Og emissions Wind turbines can either be fitted to the roof of the dwelling or on a mast within the curtilage of the dwelling Use the Photovoltaics and Alternative Technologies tab abbreviated to PV amp Alt Tech to enter data see figure Figure 650 To include data on Photovoltaic cells 1 Enter the peak kW of the system obtain this value from the manufacturer or supplier 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 To include wind turbines 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 met
73. he EPC Request Management dialogue to extract the EPCs in PDF format and save them to a secure backed up location 2 4 Uninstalling JPA Designer To uninstall JPA Designer 1 Open the Windows Add Remove programs control panel to access Control Panels se lect 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 2 5 Opening and closing JPA Designer To start JPA Designer e Select Start gt Programs gt JPA Designer gt JPA Designer from the Windows Start button To close JPA Designer e Select File gt Exit from the JPA Designer menu bar CHAPTER 2 PROGRAM BASICS 6 2 6 Figure 2 2 User Registration dialogue User Registration X Company Name Trumpton Builders Limited Key Code C167 6751 8011 0E51 C735 Call JRA on 0191 281 8393 to buy the software and obtain a Rey Code M Cancel Unlocking modules with key codes The licensing for JPA Designer is managed by key codes which we supply when you buy a licence for the program When you first install JPA Designer the modules are locked in demonstration mode in order to carry out calculations you must unlock the modules by entering the key codes Modules for which you have not purchased a licence remain in demonstration mode although you can purchase a licence and unlock them at any time You unlock
74. hich appears in the calculation e Short code used with the database to sort or enter materials not in general use e Category not in general use e Thickness cross sectional thickness of the layer measured in mm e Thermal conductivity the rate of conduction heat transfer through 1m of the material measured in W mK Sometimes referred to as the lambda value or k value e Thermal resistance the resistance to heat transfer provided by the layer measured in 2 m K W e Vapour resistivity the rate of transfer of water vapour through 1 m of the material measured in M Ns gm e Vapour resistance the resistance to water vapour provided by the layer measured in M Ns qg CHAPTER 4 U VALUE CALCULATIONS 23 e Density the mass per cubic metre of the material not required for calculation e Specific 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 4 4 2 Types of materials and cavities Layers within building elements have different combinations of properties JPA Designer recog nises 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 4 4 2 1 Normal Normal materials have the same composition all the way through so thermal r
75. iciency section select the Use default value radio button The software shows the default value for that boiler type 2 Use the radio buttons to enter the details of the Flue and Draught type For range cookers you must also enter the values for case and water Now specify the type of Heat emitters using the radio buttons and use the tick boxes to indicate whether e the boiler pump is in the heated space e the boiler has load or weather compensator e the boiler has an interlock 6 13 1 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 6 13 1 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 6 13 1 4 Room heater systems This group includes room heaters such as gas or solid fuel fires Some of the options will not be appropriate for new build but are included for compatibility with RdSAP Reduced data SAP used for EPCs for existing dwellings The only data required is that from the primary heating drop boxes However if you do know the declared efficiency of the heater you should 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 efficien
76. iling New dwelling details are Accredited Construction Details f Details are NOT Accredited Construction Details walle Partial fill cavity wall r952 0 25 13 88 13 86 2 Ground floors Solid ground floor 40 04 0 21 2 4 2 4 i Duplicate Delete room by doors should also be included However the living area cannot extend over more than one storey e Fraction of low energy lighting enter the fraction of fixed outlets which will accept only low energy lamps a figure of 25 is entered as 0 25 Approved Document L1A requires 1 outlet in 4 or 1 outlet per 25m of floor area to be low energy The SAP calculation will use the fraction you enter but the DER calculation is capped at a maximum 30 of fixed outlets being low energy e Building faces Select the orientation of the front face of the dwelling from the list The value is used in conjunction with the window orientation data to determine solar gain 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 6 10 Walls roofs and floors The data on walls roofs and floors the opaque building fabric is used to calculate the rate of transmission heat loss for the dwelling The data is entered using Walls roofs amp floors tab of the SAP Worksheet values dialogue Figure 6 8 You must enter data for each element which separates the building interi
77. ion 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 Type select Clear cavity Description type a description of the layer this will appear on the print out Thickness enter in millimetres e Thermal resistance enter in m K W Vapour resistance cavities have a vapour resistance of 0 M N s g CHAPTER 4 U VALUE CALCULATIONS 25 4 4 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 see fubsection 4 4 3 Bridged cavities require the following information e Type select Bridged cavity e Description type a description of the layer this will appear on the print out Thickness enter in millimetres Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 M Ns g You will also need to enter the bridging details see Bubsection 4 4 3 4 4 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 section Subsection 6 7 3 Vented cavities require the following information e
78. ions 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 6 6 e OK Revises the calculation taking account of any changes you have made to the data and closes the SAP Worksheet Values dialogue e Cancel Closes the SAP Worksheet Values dialogue but ignores any changes you have made to the calculation e Apply Revises the calculation taking account of any changes you have made to the data but leaves the SAP Worksheet Values 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 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 CAUTION When you enter data for the first time in any calculation you must enter all the data required for the calculation before the software can save it If you leave the SAP Worksheet Values dialogue before entering enough data then the data you have entered will not be saved 6 9 Dwelling dimensions The area and average room height for each storey are used throughout the SAP calculation
79. iption then click OK The Ground Floor Details dialogue opens see igure 4 17 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 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 4 10 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 CHAPTER 4 U VALUE CALCULATIONS 44 Figure 4 18 Sections To Print dialogue Sections To Print xX Sections to print Print bridge details 180 Moisture Table Print admittance M Cancel Figure 4 19 Print preview controls e gt Page 1 of 2 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 Secti
80. ished 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 according 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 If the material does not have a set thickness the program will prompt you to enter a thickness For more information on short 4 3 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 see Figure 4 3 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 cal culations CHAPTER 4 U VALUE CALCULATIONS 21 4 3 3 Cutting copying and pasting layers Cutting a lay
81. ks 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 15 Program options There are many ways in which you can customise the performance and outputs of JPA De signer 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 The General tab lets you set these options 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 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 14 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 calculations currently the choices are England and Wales Scotland or
82. ksheet Values dialogue Walls floors and roofs opens the Walls floors and roofs tab of the SAP Worksheet Values dialogue Water heating opens the Water heating tab of the SAP Worksheet Values dialogue Openings opens the Openings tab of the SAP Worksheet Values dialogue Primary heating opens the Primary heating tab of the SAP Worksheet Values dialogue Secondary heating opens the Secondary heating tab of the SAP Worksheet Values di alogue EPC preview button shows a draft EPC for the dwelling Project information in SAP The SAP 2005 module stores general information about the dwelling in the Project Informa tion dialogue Figure 6 4 This includes address information dwelling details and calculation options 6 7 1 Address details You can either copy client and project address details which you entered in the Project Infor mation dialogue in the Project Manager window or you can enter new data in the SAP 2005 module You can also save and re use client data ection 3 3 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 CHAPTER 6 SAP 2005 MODULE 61 Figure 6 4 The Project Information dialogue for the SAP 2005 module Project Information i Client name amp address Project address M A Builder Mr A Builder The Yard John Potter Architect 10 Portl
83. lculation the software attempts to connect to our on line database to check the validity of your licence e If your licence is current the SAP 9 81 calculation will open The software will warn you when your licence has less than 30 days to run you should then contact JPA TL to renew your licence e If your licence is not valid the software will tell you but will not open the calculation You should contact JPA TL to renew your licence e If the software is unable to connect to the database because your PC does not have an internet connection the software will display an error message and the SAP 9 81 calculation will not open 3 Managing projects and calculations 3 1 Overview JPA Designer organises and stores calculations in project files enabling you to save multiple SAP and U value calculations in the same file JPA Designer project files have the extension JDP All work with creating and saving projects and calculations is carried out in the Project Man ager window The Project Manager window lists all calculations within the project The status bar at the bottom of the window displays summary data for the currently selected calculation When JPA Designer opens it displays the Project Manager window To return to the Project Manager window from the Uvalue or SAP modules click the Project Manager button on the tool bar 3 2 Starting a new project To create a new project 1 Select File gt New Project from the main menu
84. lt gt You can change the printer settings by selecting File gt Printer setup from the menu bar Other SAP calculations 7 1 Converting 9 80 calculations to 9 81 Calculations carried out in JPA Designer to SAP 2005 version 9 80 can be converted to 9 81 calculations This is particularly useful where the original compliance calculations were to 9 80 and a 9 81 calculation is required in order to issue an EPC To convert a 9 80 calculation to 9 81 1 In Project Manager make a duplicate of the original calculation see fection 3 12 2 Double click on the duplicate calculation to open it 3 From the menu bar select Edit gt Project information The Project Information dialogue opens see section 6 7 4 Tick the box SAP 9 81 and select the Building type and Location then click OK You will need to review the input data for the calculation to ensure you have addressed the new items in version 9 81 7 2 Multiple dwellings Because SAP ignores heat loss through party walls and separating floors it can be extremely difficult to demonstrate the necessary reduction in carbon dioxide emissions for mid block apartments and terraced houses even with standards of fabric and building services which would easily allow a detached house to pass Approved Document L1A allows you to using average TER and DER values for apartments and terraced houses so higher performing units those on the end of terraces or ground and top floors of apartmen
85. m heater has been approved by HETAS tick the box This will improve the default efficiency used for the heater If you know the actual efficiency for a solid fuel heater you should tick the Use manufacturer s declared efficiency box then enter the Make Model and Declared efficiency You must also select the BS Test Method used to obtain the efficiency value Heating Equipment Testing and Approval Scheme CHAPTER 6 SAP 2005 MODULE 88 Figure 6 26 The Secondary heating tab Group Room heater systems Sub group Solid fuel system Cloged room heater Fuel wood logs bd J Solid fuel room heater i HE TAS approved Me Use manufacturer s declared efficiency Make Morso Model 3142 Declared efficiency iat 00 BS Test Method BS EN 13240 6 15 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 which has sections for air infiltra tion and ventilation strategy see Figure 6 27 6 15 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 cubic metres of air moving through a square metre of exposed building surface each hour m m7hr the measure is often referred t
86. ma terials dialogue to make any changes 3 Set the environmental conditions see Section 5 1 4 View the results see Section 5 2 Please note the module can not carry out condensation risk analysis for ground floors base ments 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 2BS 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 50 CHAPTER 5 CONDENSATION RISK ANALYSIS 51 5 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 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 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
87. material dialogue opens 2 Enter the appropriate value for dU in the dU box see Figure 4 7 then click OK Click the Help button to view the standard values for dU In many cases the default value of zero is appropriate 4 5 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 perfor mance 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 waterproofing membrane e A factor x W day m K mm for increased heat loss caused by rainwater flowing on the membrane In JPA Designer that data is entered using the U value Construction dialogue As you have to indicate which layer is affected by the 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 bo
88. me in the Other volume box CHAPTER 6 SAP 2005 MODULE 74 Figure 6 14 Data fields for a hot water storage tank Source af domestic hot water Hot water storage tank k Hot water tank volume Storage tank insulation Hot water tank heater C110 litres Other volume I G Foam Thickness mm Single electric immersion heater c 160 litres Woe 50 oo f Dual electric immersion heater 160 0 acket f 2170 litres f Boller feed Manufacturers declared loss factor Declared loss Factor if known kaihda e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Hot water tank heater use the radio buttons to select the heat source If you select an immersion heater an additional tick box is displayed for selecting off peak electricity e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP e Use the four lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e the primary pipework between the boiler and tank is insulated tick box only displayed if boiler feed is selected e there is a thermostat in the hot water tank e there is a separate timer for the domestic hot water Those features indicated by asterisks are required by Building Regulations the dwelling will fail if they are not present If the dwelling h
89. n also save and re use client data see ection 3 3 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 project 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 15 CHAPTER 4 U VALUE CALCULATIONS 16 Figure 4 1 The Construction details dialogue U value Construction j x Element Type Internal Surface C Flat roof High Emissivity Low Emissivity Surface Resistance mK 0 3 External Surface High Emissivity Low Emissivity Surface Resistance m K 0 04 Pitch roof horizontal ceiling Floor other than ground floor _ C Solid ground floor Light steel frame Construction Type BRE Digest 465 Pitch roof ceiling at rafter line C Suspended ground floor Not a light steel frame Construction Aall C Basement Floor fag ee Rainscreen cladding Basement Wall Cold Hybrid Element description Built up metal roof yall cladding using rail amp bracket spacer SCI P312
90. n 200 mm e Flues vertical ducts for combustion gases with diameter less than 200 mm e Extract fans and passive vents intermittent extract fans in bathrooms and toilets and passive vent systems Flueless gas fires e Number of Sheltered sides to the dwelling Sheltered sides reduce the rate of air infil tration resulting from exposure to wind forces See sections 2 1 and 2 2 of the SAP 2005 documentation for further guidance In the Ventilation type section use the radio buttons to select the ventilation strategy for the dwelling If you are specifying whole house ventilation or extract systems you should consider using data for a specific system rather than relying upon the default values within SAP which will give a poor result You can enter data on the system yourself or use the BRE mechanical ventilation database which holds performance data on a wide range of mechanical ventilation and extract systems The BRE database is built in to JPA Designer To enter user defined data for ventilation or extract systems CHAPTER 6 SAP 2005 MODULE 91 1 Figure 6 28 The BRE Ventilation Database dialogue Mechanical Yentilation Database l Manufacturer EUa Available 1st Year Made Final Year Made Configurations tested Greenwood Fusion Rigid 3 Greenwood HAYSS 2007 current 3 Rigid 7 Greenwood MYHR GOR current 3 Rigid 4 Muaire MRESBOKI0DS 2008 current 3 Rigid 5 Wet rooms excluding kitchen 2 Insulated d
91. ngs within the dwelling see Figure 6 13 the dialogue is headed either New Doors Windows amp Rooflights or Edit Doors Windows amp Rooflights The dialogue requires the following data Opening Type Use the drop down to select whether it is a window rooflight or door Opening within Use the drop down to select which element floor wall roof which contains the opening The software uses this information to calculate the net areas of the elements Glazing Use the drop down to select the type of glazing considering the number of leaves of glass the gas between them 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 Double glazing air gap Use the radio buttons to select one of the default values or enter your own value Frame type Use the radio buttons to select the best match 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 CHAPTER 6 SAP 2005 MODULE 72 Figure 6 13 The
92. nity heating scheme gt Hot water tank volume Storage tank insulation Hot water tank heater 110 litres Other volume I Foam Thickness mm Single electric immersion heater of 160 lites p C 50 00 Dual electric immersion heater 210 f Jacket ha 210 litres Boiler feed f Summer immersion heater l Manufacturer s declared loss factor Declared lass factor t al i W Off peak electricity immersion heaters Figure 6 18 Data entry for gas water heaters or heat exchangers Source of domestic hat water gaz water heater or heat exchange built into a gas warm air system Hot water tank volume C 110 lites Other volume ll Foam Thickness mm 160ltes p Jacket 50 00 210 litres j P tank insulation Manufacturer s declared loss factor Declared loss factor it known EM h day e Use the four lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e the primary pipework between the boiler and tank is insulated tick box only displayed if boiler feed is selected e there is a thermostat in the hot water tank e there is a separate timer for the domestic hot water Those features indicated by asterisks are required by Building Regulations the dwelling will fail if they are not present If the dwelling has solar panels complete the
93. o 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 m hr for all dwellings which will be checked by pressure testing Design stage calculations have to be revised 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 15 m m hr 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 Pressure testing is not required in Scotland if the DER is calculated using an air permeability value of 10 for dwellings with accredited construction details and 15 for dwellings without accredited construction details CHAPTER 6 SAP 2005 MODULE 89 Figure 6 27 The Ventilation tab Source of q50 value Pressurization Test Result m mi not suitable for Building F ara Pressure Test Assumed Calculated PE e Design g50 reer hj az built as designed Small development no pressure testing carried out Construction stage Ventilation First measured g50 rere hooo Number of chimneys 0 First pressure test date PO Number of flues o
94. 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 see 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 default thermal resistance for the deck of 0 2 m K W for the deck This represents a 18 mm softwood deck Insulation between joists should be entered as a separate layer bridged by timber in one dimension see Subsection 4 4 3 4 8 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 CHAPTER 4 U VALUE CALCULATIONS 40 e F the area of ventilation openings per perimeter length of under floor space in m m e H the height of the upper surface of the floor above external ground level in m e Uw the Uvalue of the walls of the under floor space above ground level calculated according to ISO 694
95. older c program files jpatl jpa designer 981 and click Next 5 The Select Program Folder screen lets you choose where to create the shortcut for JPA Designer Again unless you have good reason accept the default value a new program group named JPA Designer and click Next 6 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 Yes launch the program file then click Finish The installer will close and JPA Designer will open 2 3 Updating JPA Designer JPA Designer is often updated with improvements and new features You can take advantage of those developments by downloading the latest version of the software from our web site www techlit co uk downloads htm To find out whether you have the latest version you should compare the version number on the web site with that of the software you are using select Help gt About from the menu bar and note the version number The format will be JPA Designer 4 00x Build 000 where x may include letters and numbers You can configure the software to check for updates automatically To turn on checking for updates 1 In Program Manager select Options from the menu bar The Options dialogue opens 2 On the first tab of the Options dialogue tick the Check for programme updates box Figure 2 1I If you connect to the internet using a proxy server you must tick the Use pro
96. om munity heating scheme To specify a community heating scheme 1 Set Group to Community heating scheme JPA Designer displays the Community heat ing section of the tab see Figure 6 25 2 In Community heating set the main heat source This is important for community heating schemes which have a CHP component including heat from waste combustion If there is no CHP component you should set the Community heating to gas 3 Set the Boiler 1 fuel For a system with CHP this is the fuel for the back up boiler For a non CHP system this is the main heating fuel 4 If there is a second boiler using a different fuel to the first one set the Boiler 2 fuel 5 Set the Heating controls 6 Set the efficiency of Community heating boiler 1 this is the efficiency of Boiler 1 7 Set the Boiler 1 heat fraction this is the proportion of heat provided by Boiler 1 and will be between 0 00 and 1 00 If there is only one boiler leave the value as 1 00 8 Set the efficiency of Community heating boiler 2 this is the efficiency of Boiler 2 If there is no second boiler leave this at 0 00 CHAPTER 6 SAP 2005 MODULE 86 9 If the scheme has CHP or waste combustion set the Fraction of heat from CHP unit For all other schemes leave this at 0 00 10 If there is CHP set the Electrical efficiency of the CHP unit as a ratio between 0 00 and 1 00 For all other schemes leave this at 0 00 11 If there is CHP set the Heat efficiency of the CHP unit
97. om the drop down list The description does not affect the calculation 4 2 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 resistances are affected by the direction of heat flow through the construction and the emissivity of the exposed 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 see and the emissivity of the surfaces using the values from BS EN ISO 6946 shown in lable 4 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 CHAPTER 4 U VALUE CALCULATIONS 18 Table 4 1 Thermal resistances Heat flow Element Internal resistance Rsi External resistance Rse Horizontal Wall window 0 13 0 04 Upwards Roof 0 10 0 04 Downwards Floor 0 17 0 04 4 2 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 Construction Type section indicates whether the structure has a light steel frame and if so whether it is of warm or cold construction
98. on 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 alternatively click the Database button on the toolbar The Products Database 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 alternatively you can double click on the material in the Products box The Thickness dialogue opens CHAPTER 4 U VALUE CALCULATIONS 20 Figure 4 3 Inserting a new blank layer spa Designer File Edit Insert view Options Help ohare Laver From database os Variable layer Blank layer Layer Layer list Conductivity Flesista mr rik Pitch Bo Bridge Details Vapour Vapour Resistivity Resistance MNs gml MNs f1 Outside 2i Inside sL 5 Enter the thickness of the layer then click OK The Construction box now shows the new layer is added to the calculation and is shown in If the material has a set thickness the layer will be added without the Thickness dialogue opening 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 fin
99. on see Subsection 4 5 2 To edit the properties of a layer 1 Click on the layer to select 2 From the menu bar select Edit gt Layer alternatively double click the layer or press lt Enter gt The Edit Material dialogue opens 3 Amend the data for the layer and click OK CHAPTER 4 U VALUE CALCULATIONS 22 Figure 4 4 The Edit Material dialogue Edit Material l x Material Description Short code Category Blank layer double click to edit Thermal Thermal Vapour Vapour conductivity resistance resistivity resistance Pairk mek MM s gmn MMs o o 0 000 ooo poo foo Density kg n 0 0 Specific heat capacity J kg K 0 0 Thickness Imm Type Bridge type f Normal Fixed Vapour Resistance Clear Cavity None 9 Help Composite Membrane Bridged Cavity 1 dimensional Is thermal insulation f Vented Cavity 2 dimensional Thermal bridge Bridge description Froportion bridged f 00000 Bridge width mm 0 0 sl Non bridge width mm 0 0 se Sor bridge height mm n a Y Bridge thermal conductyvity Mamk 0 00000 Bridge thermal resistance mikn 0 00000 Bridge thickness lt amp Follows material thickness 0 0mm Fixed at 0 0 mm Air gap correction deta u 0 00 wenk 7 Help X cova 4 4 1 Basic characteristics The Material section contains the basic data about the layer including e Description the name of the material or a description w
100. on process Use the radio buttons in the 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 see section Subsection 4 7 3 e Pitched roof with horizontal ceiling Typically a cold roof with the insulation applied between and over the ceiling joists although it is feasible to have a horizontal ceiling and the insulation in the plane of the rafters 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 see Subsection 4 5 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 You may also enter a description for the element in the Description box or select one fr
101. on to account for the effect of having an unheated space to the cold side of the construction see fubsection 4 5 5 CHAPTER 4 U VALUE CALCULATIONS 28 Figure 4 5 Data entry boxes for the mechanical fasteners correction Layer bridged by mechanical fasteners in Light steel frame construction or a brackets in built up metal roofAwall cladding Correction for mechanical fasteners vi Alpha m Thermal conductivity o oo Wink Fasteners per 0 00 off Fasteners cross 0 000 mm of fasteners square metre sectional area 4 5 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 counter battens fixed back to the rafters e Warm flat roofs where the insulation and or the waterproof membrane is mechanically fixed to the deck There is no need to apply a correction e 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 e 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 mkK The
102. ons To Print dialogue opens see Figure 4 18 2 Use the tick boxes to select whether to print an additional page showing the details of the bridging calculations you can also choose whether to include the ISO moisture table for condensation analysis 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 see Figure 4 T9 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 see Figure 4 18 3 Use the tick boxes to select whether to print an additional page showing the details of the bridging calculations you can also choose whether to include the ISO moisture table for condensation analysis CHAPTER 4 U VALUE CALCULATIONS 45 4 Click OK The Print preview window opens see Figure 4 19 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 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 calculation 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 h
103. ons describe how to enter data for the each group In each case start by using the drop boxes to set the e Group e Sub group e System e Fuel e Heating controls Note the software will test for the suitability of the selected heating controls against criteria from the Domestic Heating Compliance Guide Inappropriate heating controls can cause a dwelling to fail its compliance check Always work from Group downwards as the options in the lower drop boxes change accord ing 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 CHAPTER 6 SAP 2005 MODULE 83 6 13 1 1 Central heating systems with radiators or underfloor heating This group covers wet central heating systems with radiators or pipes embedded in the floor the systems can be heated by boilers or heat pumps For most heat sources you must specify the efficiency of the boiler the exceptions are electric boilers and heat pumps There are three sources of boiler efficiency data e The Boiler Efficiency Database see Subsection 6 13 3 The database should be used for calculations towards the end of the design process and beyond once a specific boiler has been chosen e A user entered SEDBUK value Enter a SEDBUK percentage at the first stages of the design process e A default value for the type of boiler This is not recommended as the default efficiencies are
104. oor Type radio buttons to select the type of floor construction 4 8 1 2 Floor dimensions The thermal resistance of the ground is determined from the ratio of the floor s perimeter and area The perimeter expressed in metres is measured along the finished internal 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 CHAPTER 4 U VALUE CALCULATIONS 39 Figure 4 15 Calculating the resistance of a beam and block deck Deck Resistance mek M Calculate if Description Block width mm aan Thickness mm 100 Conductivity irk 0 000 Beam web width mm e0 Beam conductivity ar mE i 1320 Screed Screed depth mm 50 Screed conductivity wrk i 150 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 4 8 1 3 Deck The data required for this section depends upon the type of construction specified in the Floor Type section
105. oportion 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 To calculate the thermal resistance of the air space click the Small airspace resistance button The Small Airspace Resistance Calculator dialogue opens see Figure 4 T2 Enter the thickness and width of the air space The thickness will be the 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 see Bubsection 4 5 2 use the value 0 01 Click OK From the menu bar select Edit gt Construction Type The Uvalue Construction dialogue opens In the Built up metal roof wall cladding section enter the Rail spacing and Rail width see Figure 4 11 Use the drop down to indicate which layer is bridged by the rail liner det
106. or click the New Project button on the toolbar JPA Designer creates a new blank project 2 Click on the name Blank project then select Edit gt Edit selected item from the menu bar The Description dialogue opens 3 Type a new name for the project and click OK JPA Designer updates the project name The project name does not affect the calculations in any way You can now start adding calculations to the project CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 9 Figure 3 1 The Project Information dialogue Project Information x Client name amp address Project address pee ou ee i Oooo ee ee Oooo ee pW BostCode fits Post Code PO Phone Fax mai Po to clients Edit clients list Reference certificate Date 25 June 2008 3 3 Adding project information JPA Designer can store client details and project location for each project which can then be copied into all calculations within that project You can enter and edit that information using the Project Information dialogue Figure 3 1 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 Information The Project information 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 box this box is used for retrieving details yo
107. or from outside or from an unheated space Elements which separate two heated spaces party walls and separat ing floors are ignored at this point You must also take account of heat losses through thermal bridging at the junctions between elements see Subsection 6 10 2 Data for elements is en tered using the Element dialogue see Figure 6 9 whilst data for linear thermal bridging is entered on the Walls roofs amp floors tab To define a new element CHAPTER 6 SAP 2005 MODULE 66 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 Click Yes to delete the element or No to cancel the deletion 6 10 1 Building elements The Element Dialogue is used to enter data on each of the dwelling s opaque elements see Figure 6 9 it takes the following data e Element Use the drop down to set the type of
108. ou have chosen to use gross areas for opaque elements there is no need to subtract the areas of openings from wall or roof areas 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 U values for walls and roofs should be calculated using the method described in ISO 6946 U values for ground floors should be calculated using the method described in ISO 13370 e Effective thermal resistance of unheated space Ru The Ru coefficient is used to adjust the U value of an element to allow for the beneficial effect of an enclosed but unheated CHAPTER 6 SAP 2005 MODULE 68 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
109. ound the rail e The point bridging produced by the brackets 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 1 Create and open a new U value calculation 2 Enter any project information 3 In the U value Construction dialogue select either wall or flat roof and tick the Built up metal roof wall box the program will display several new data entry boxes Do not complete them at this stage Click OK CHAPTER 4 U VALUE CALCULATIONS 35 4 5 10 11 12 13 14 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 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 see 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 conduc tivity The program will show the pr
110. pects 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 dialogue The Openings tab lists the dwelling s windows doors and rooflights grouped by building element The buttons below the list allow you to create edit and delete openings You can enter each opening individually or you can group the openings on each face of the building into one area as long as they have the same specification For each opening the data is entered using the Doors Windows amp Rooflights dialogue 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 CHAPTER 6 SAP 2005 MODULE 70 Figure 6 11 The Openings tab a e inte ot abo OA ot Ceuta Heath Aina cae sat anol e azed air filled low E En 0 1 210 ack lmm 2 10 Back FYC u 2 10 Front PY C u 12mm 2 10 Back FYC u 12mm 2 10 Front PY C u 12mm Back FY C u 12mm fid D Mew Edit Duplicate Tf Delete Change U value of selected 4 To duplicate an opening Duplicating an opening creates a new copy of the original opening which can then be edited as most openings will have the same parameters using the duplicat
111. performance data for most central heating boilers available in the UK as well as data on mechanical ventilation sys tems The database is maintained by the BRE and is available for download at www boilers org uk A new version of the database 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 two months old the software prompts you to download the latest version You can also download the database yourself To download the database CHAPTER 6 SAP 2005 MODULE 87 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 2005 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 bedf2005 dat 5 At the warning bedf2005 dat already exists Do you want to replace it click Yes 6 At the Download complete dialogue click Close The database is now updated 6 13 4 Identifying the primary heating system In some cases usually existing dwellings it may be difficult to identify the primary heating system In such cases any central he
112. poor and make it difficult to obtain a pass To use the boiler database 1 In the Boiler efficiency section select the Select from the boiler database radio button 2 Click the Select boiler button The Boiler Efficiency Database window opens The issue date of the database is shown in the bottom left of the dialogue 3 Select the Boiler manufacturer The list of that manufacturer s boilers is displayed along with the manufacturer s address 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 5 Click the Use selected boiler button The Boiler database window closes and the Pri mary heating tab shows the summary details for the chosen boiler To enter a manufacturer s SEDBUK value 1 In the Boiler efficiency section select the Use manufacturer s declared SEDBUK value radio button 2 Enter the Make and Model of boiler and the Declared SEDBUK value You will also need to indicate the type and fuel of any Keep hot facility and details of the Flue and Draught type To use the default value Seasonal Efficiency of Domestic Boilers in the UK CHAPTER 6 SAP 2005 MODULE 84 1 In the Boiler eff
113. pplied by the tank manufacturer instead of relying on the default values in SAP 2005 e Use the radio buttons and tick boxes to indicate whether The thermal store is integrated or hot water only The thermal store is in an airing cupboard The thermal store is close coupled 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 e Use the four lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e the primary pipework between the boiler and tank is insulated tick box only displayed if boiler feed is selected e there is a thermostat in the hot water tank e there is a separate timer for the domestic hot water Those features indicated by asterisks are required by Building Regulations the dwelling will fail if they are not present If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O O 6 12 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 e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation enter its Thickness in mm Regulations re
114. quire foam insulation e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 e Specify whether the CPSU is in an airing cupboard using the radio buttons e Specify the winter operating temperature of the CPSU use the radio buttons to set one of the default values alternatively enter your own e Specify the size of the CPSU cylinder use the radio buttons to set one of the default values alternatively enter your own e Specify whether the CPSU as a separate timer for the heating store CHAPTER 6 SAP 2005 MODULE 79 Figure 6 20 Data entry for CPSU hot water supply Source of domestic hot water Combined sto Hot water tank volume storage tank insulation jj Hot water tank heater 2 110 litres Other volume I Foam Thickness mm 0 Single electric immersion heate f 160 litres p s Ta derka 50 00 o Duallelectic n heater 160 0 Pe eet ree AANA ve 210 litres f Bolerfeed F Summer immersion heater gt Manufacturer s declared loss factor Declared lose factor if known EW hidan CPSU T ermal store ating cupboard tf Mo CPSU Winter operating temperature CPSU Cylinder size F ECC ac SBC 270 litres C 200 litres 230 litres Thermal store or CPSU has seperate timer for heating store i i e E Other C e5 Other litres 60 0 I Cylinder in heated space
115. radio buttons to as designed No further data is required 4 For post completion calculations set the radio buttons to as built The tab shows the Construction stage section 5 Enter the First measured q50 and the First pressure test date 6 If the dwelling failed the first pressure test and a second was required tick Dwelling failed first pressure test and enter the Second measured q50 and the Second pressure test date CHAPTER 6 SAP 2005 MODULE 90 To use an assumed value for air pressure 1 In the Source of q50 value section select Assumed value The Design q50 box is set to 15 m m hr this value cannot be changed 2 Tick the Small development box which indicates the dwelling is part of a development of one or two dwellings If you do not tick the box the dwelling will fail its compliance checks To use a Calculated value 1 In the Source of q50 value section select Calculation 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 rates based on the SAP defaults In all cases leave the box 100 draught stripping ticked 6 15 2 Ventilation strategy 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 tha
116. res As part of the process of producing an EPC the software must calculate the likely benefit from installing a wind turbine You should therefore specify the Terrain type even if there is no wind turbine on the dwelling CHAPTER 6 SAP 2005 MODULE 94 6 18 Special features SAP 2005 includes a method for including the effects of new technologies which are not included in the original methodology The method which is described in SAP 2005 Ap pendix Q may only be used for products which are independently assessed and listed on the Appendix Q web site at http www sap appendixq org uk The web site has a calculation spreadsheet for the various product types and data sheets for individual products To use the appendix Q method you first complete the appropriate calculation spreadsheet this requires information on the product taken from its datasheet and may involve changes to the SAP calculation Then you transfer the results from the spreadsheet to the Special features section of the Photovoltaics and Alternative Technologies tab To enter Appendix Q results 1 Enter a brief Description of the technology e g flue gas heat recovery or whole house ventilation 2 Enter the Energy saved figure from the spreadsheet and use the drop down to select the Type of fuel saved 3 Enter the Energy used figure from the spreadsheet and use the drop down to select the Type of fuel used 6 19 Checking compliance Once you have entered all th
117. ribes 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 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 4 U VALUE CALCULATIONS 37 1 Create a new U value calculation in the Project Manager window and open it for editing see Section 3 6 2 Enter any project information in the Project Information dialogue 3 In the U value Construction dialogue select Solid ground floor orSuspended ground floor enter a description for the construction then click OK The Ground Floor Details dialogue opens 4 Enter the data for the ground see bubsection 4 8 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 4 8 1 Ground floor details The Ground Floor Details dialogue contains the data which describes the ground and the floor structure see Figure 4 14 It
118. ry out an initial calculation using the default values for x and n 4 5 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 For further information see ISO 6946 section 5 4 To allow for unheated spaces 1 From the menu bar select Edit gt Construction type The U value Construction dialogue opens 2 Enter the two areas in the Ai and Ae boxes see Figure 4 9 3 Click OK CHAPTER 4 U VALUE CALCULATIONS 32 Figure 4 9 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 Area of all components between inside amp unheated space Ai a m unheated space amp outside Ae an m emee Figure 4
119. t blocks can compensate for the poorer performance of units in the middle or blocks or terraces JPA Designer includes a multiple dwelling feature to carry out the average TER and DER cal culations The Multiple dwellings SAP window has two panes the left hand one labelled Available SAP V98 Dwellings lists all the SAP 9 81 dwellings within the project which are eligible for inclusion in the multiple dwellings calculation The right hand pane la belled Dwellings in this multiple dwelling lists all the dwellings which are currently included in the multiple dwellings calculation The Add and Remove buttons transfer selected dwellings between the panes The results of the multiple dwellings calculation are shown below the panes together with the compliance status In order to pass the Average DER must be equal to or less than the Average TER To carry out a multiple dwelling calculation 97 CHAPTER 7 OTHER SAP CALCULATIONS 98 Figure 7 1 The SAP window for a multiple dwellings calculation Available SAP 98 Dwellings Dwellings in this multiple dwelling Detached house Add gt gt Detached house Appendis O Detached house photovoltaics Penne Standard house type B458 Total floor area 148 80 rr Average TER 29 20 Average DER 29 82 Compliance Fail 1 Carry out normal SAP calculations for all the units in the block You may need to duplicate some calculations to ensure you have one for each flat Note that if a
120. t 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 e The average depth from the external ground surface to the basement floor h metres Details of the insulation in the basement floor e The thermal conductivity of the ground lambda W mK see Table 4 3 and annex G of BS EN ISO 13370 CHAPTER 4 U VALUE CALCULATIONS 43 Figure 4 17 Entering data for basement walls x Basement floor dimensions Basement Details for ISO 13370 Pad 0 00000 Calculate it h m 2 500 w m 0 300 lambda 1 500 Default Basement floor insulation When calculating basement WALL U values add the basement walls and any insulation in to the main window as layers 50 13370 suggests you include the masonry Wall 300mm thick with a conductrity of 1 7m E 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 bos on the right Insulation al name Insulation thickness mm 0 0 Insulation conductrity pink 0 000 Description To calculate a basement wall U value 1 Create a new U value calculation in the Project Manager window and open it for edit ing 2 In the U value Construction dialogue set the Element Type to Basement Wall enter an Element descr
121. tabase N N N N ee NS NS Cy onaensation Frisk analysis nvironmental conditions Viewing results Using the previous calculation method A Uutputting calculation resu ag gt w lt gt lt C ar Determining compliancg Overview of the sAF Z005 module a rreparing to Carry out a SAF 2005 Calculation arrying Out a SAP 2005 calculation e SAF windo Project information in SAF O ntering project date J Dwelling dimension VValls roots and tloor Opening VVater heating Primary heating 4 econdary heating Ventilation 12 Pnotovoltaics and micro wind turbine O pecial teature ecking compliance 20 Outputting SAF resu er SAF Calculations onverting 9 o0 calculations to 9 0 Multiple dwellings xtensions to existing dwelling Introduction Welcome to JPA Designer version 4 xx the thermal calculation program from JPA TL for car rying out SAP and U value calculations and assessing the risk of interstitial condensation JPA Designer includes many features to make the calculation process easier Project based file system enables you to keep Uvalue and SAP 2005 calculations in same project file U values can be linked to SAPcalculations SAP calculations are automati cally updated when U values are changed Calculation results can be produced as PDF files for emailing Includes a database of common materials to speed U value calculations On screen help inclu
122. tons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 If the dwelling has solar panels complete the Solar panel section of the Water heating tab see SUD O O 6 12 4 Community heating scheme hot water The hot water for dwellings heated by community heating schemes can provided by immersion heaters or by a heat exchanger fed from the scheme Enter the following data e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Hot water tank heater use the radio buttons to select the heat source If you select an immersion heater an additional tick box is displayed for selecting off peak electricity e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 CHAPTER 6 SAP 2005 MODULE 76 Figure 6 17 Hot water options for community heating schemes Source af domestic hot water a ca cna Commu
123. tton on the tool bar The Sections To Print dialogue opens see Figure 6 37 CHAPTER 6 SAP 2005 MODULE 2 Use the tick boxes to select the outputs you want to produce 3 Click OK The Print preview window opens see Figure 4 19 96 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 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 Select Yes or No The Sections To Print dialogue opens see Figure 6 37 Use the tick boxes to select the outputs you want to produce Click OK The Print preview window opens see Figure 4 T9 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages 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 calculation name so the calculation Plot 28 in a project The Meadows will be called The Mead ows 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 characters otherwise PDF creation will fail The restricted characters are
124. u 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 summer 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 number in the annual buildup column indicates summer evaporation will be greater than winter deposition 5 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 conditions following BS 6229 and BS 5250 which are e summer temperature 18 C e winter temperature 5 C e summer relative humidity 65 e winter relative humidity 95 CHAPTER 5 CONDENSATION RISK ANALYSIS 55 If you need to calculate condensation risk for other 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 stan
125. u 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 dia logue and select a client from the list see Figure 3 2 If you need to edit the stored details click Edit clients list then make the changes in the Edit Clients dialogue 3 4 Saving projects JPA Designer project are saved in the same way as any other file To save a project CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 10 Figure 3 2 Project Information dialogue client drop down Project Information M Chent name amp address Mr A T Builder Mr R T Builder Trumpton Builders Ltd Thane Aodse 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 Options dialogue see fon 3 15 3 5 Opening projects To open an existing project 1 From the menu bar select File gt Open project The Open dialog
126. uct Database date 29 8 2008 Use the selected system Cancel From the Source of mechanical ventilation parameters select User defined 2 Click the Enter details button The User defined ventilation parameters dialogue opens and you can now enter the data To use ventilation data from the BRE ventilation database D u p From the Source of mechanical ventilation parameters select Database Click the Lookup button The Mechanical Ventilation Database dialogue opens see Igure 6 20 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 Click the Use the selected system button The dialogue closes and the summary of the system is displayed next to the Database radio button CHAPTER 6 SAP 2005 MODULE 92 Figure 6 29 The Overheating tab Building region Thames valley gt gt Effective air change rate Enter value 5c Building Aino pening Two storey dwelling windows open upstairs and downstairs Cross ventilation not possit windows fully open Select an item that best describes the type of construction used in the dwelling User defined Thermal Mass Parameter Suspended timber floor timbersteel frame walls plasterboard on timber steel stud internal partitions Soli
127. ue opens 2 Select the file you want to work with then click Open The project opens in the Project Manager window 3 6 Adding calculations to a project You can add new U value and SAP 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 33 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 3 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 80 and 9 70 of SAP as well as SAP calculations for multiple dwellings CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 11 Figure 3 3 The Description dialogue x Enter a description For the divelling 3 7 Opening calculations To open a U value or SAP calculation 1 In the Project Manager window click once on the calculation name to select it 2 From the menu bar select Edit gt Selected item The calculation opens You can also open a calculation by double click on it in the Project manager window 3 8 Closin
128. uggest you use this manual in conjunction with the government s guide to SAP available from the BRE web site www bre co uk sap2005 Approved Document L1A and the Domestic Heating Compliance Guide both available from the Planning Portal www planningportal gov uk 6 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 1 Meeting the TER The Dwelling CO2 Emission Rate measured as the amount of CO2 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 CO2 Emis sion Rate is based on the emissions from a notional dwelling of the same dimensions as the proposed dwelling but reduced by an improvement factor of 20 The SAP module calculates the TER using the data you enter about the proposed dwelling and the default conditions specified in Appendix R of the SAP specification In order to issue an EPC you will need to be a member of a government approved 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 and Northern Ireland 56 CHAPTER 6 SAP 2005 MODULE 57 2 Limits on design flexibility To ensure long term performance and to prevent excessive trade offs between fabric and plant Approved Doc
129. ument 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 e minimum proportions of low energy lighting The SAP 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 the SAP 9 81 document contains a method for testing levels of solar gain The SAP module implements that method to test for compliance 4 Quality of construction The performance of the dwelling as built must be consistent 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 measured air permeability must be lower than 10 m m hr 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 16 requires an energy rating to be prepared using SAP 2005 and fixed to a conspicuous place in a new dwelling The outputs from the SAP 2005 module can be used to meet that requirement 6 3 Overview of the SAP module Carrying out a SAP calculation using JPA Designer is straight forward The main SAP win dow shows the on
130. untry 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 2005 in slightly different ways You must use the Country drop down to select the correct location to ensure the dwelling is tested against the appropriate regulations e Location this is used in the Energy Performance Certificate Select the closest matching value from the drop down 6 7 3 Calculation options The bottom of the Project Information dialogue contains several calculation options e Treat low e glass coating as soft soft coatings allow more solar flux through glass and will increase solar gain Tick the box to apply this option to all low E glass in the calculation e Enter gross opaque element areas the SAP 2005 calculation is based on the areas of walls and roofs net of windows If you select this option you only have to enter the gross areas of walls and roofs and the program will use the window and roof light areas to calculate the net areas If you change the setting of this box the software then close the Project Information 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 from 1 April 2005 new or replacement gas boilers should be condensing boilers unless the exemption proce dure in the Domestic
131. upport 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 Check the FAQ on the web site to see if the query is addressed there Consult the SAP specification and associated documents 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 2 Program basics 2 1 System requirements JPA Designer requires a PC with CD ROM drive running MS Windows 2000 or later The PC will require an internet connection if you intend to update the boiler database for the SAP 2005 module from the BRE web site or wish to issue Energy Performance Certificates JPA Designer can run on Apple Macintosh computers using PC emulation software but we do not guarantee the software will run and do not offer technical support for running JPA Designer on such systems 2 2 Installation You can install JPA Designer from the CD you received when you purchased the program or you can download the installation file from our web site www techlit co uk The version available on the web site will always be the most up to date one 2 2 1 Downloading the inst
132. value calculation JPA Designer shows the Descrip tion dialogue Click OK to accept the default description and close the Description dialogue JPA Designer shows the new U value calculation in the Project manager window Double click on the new U value calculation The U value module opens with a warn ing pop up about demonstration mode Click OK to dismiss the pop up warning The User Registration dialogue appears see igure 2 2 Enter the user name and the key code for the U value module exactly as given then click OK Please note 0 zero You will need to overwrite both the default user name and the key code You can now start entering data for the U value calculation If you see an incorrect key code error message you should re enter the user name and key code If you need to change the user name because for example the company name has changed you should contact us for a new key code To enter a different key code for a module you have previously unlocked 1 2 7 In Program Manager open a SAP or U value calculation depending on which module you are dealing with From the menu bar select Edit gt User amp Security codes The User Registration dialogue appears Enter the user name and the key code exactly as you have been given them Click OK Licence management The licence for the SAP 9 81 module has to be renewed on an annual basis Whenever you create or open a SAP 9 81 ca
133. vide the space heating Enter the following data e Hot water tank volume use the radio buttons to select one of the default values or enter the actual volume in the Other volume box e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Hot water tank heater use the radio buttons to select Boiler feed as the heat source e Manufacturer s declared loss factor Use the box to enter a declared heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2005 e Select the Fuel used by the community scheme using the drop down CHAPTER 6 SAP 2005 MODULE 81 Figure 6 23 Data entry for solar water heating Solar panel details Solar collector type Direction Overshading Aperture area of collector net rr 0 00 f Evacuated tube collector C South C Heavy 80 sky blocked ero loss collector efficiency 0 00 C Flat plate collector C SESW Significant 60 80 sky blocked C Unglazed gt Collector heat loss coeffficient 0 00 fee 5 ee i Modest 20 60 sky blocked Pitch NEJM Dedicated solar storage litres 0 00 Horizontal 60 degrees C North None or very litte lt 20 sky blocked Separate solar cylinder f 30 degrees C Vertical f 45 degrees Solar powered pump e Set the Efficiency of the community boiler heat pump or CHP the figure should be a percentage e If the community heating scheme has a combined heat
134. visible but will only work in demonstration mode and will not display calculation results You can of course purchase additional modules at any time We hope you find JPA Designer a useful calculation tool We are always happy to receive comments suggestions for improvements or proposals for enhancements to suit your specific needs 1 1 Getting help This manual has been designed to provide easy reference to all the features of JPA Designer 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 Select Edit gt Primary heating system means select the Primary heating system option from the Edit menu 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 see section Subsection 2 2 T for instructions and see if that resolves the problem as we may already have resolved it e Check the FAQ on the web site to see if the problem is addressed there e If the problem persists email details of the problem to s
135. with different humidity characteristics BS 5250 2002 suggests relative humidity ranges for those types see lable 5 1 The internal relative humidity is affected by the external conditions External Temperature Ext T and External Relative Humidity Ext RH the external conditions depend upon the building s location JPA Designer includes external tem perature and humidity data from 20 sites around the UK allowing you to select the nearest location to the project site 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 fection 5 3 To set the environmental conditions 1 5 2 From the menu bar select Edit gt Environmental conditions The Environmental condi tions dialogue opens Select the humidity class using the Internal humidity class dropdown The Int RH col umn is completed Enter the internal design temperature in the Internal temperature box The Int 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 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 I
136. xes appear 4 Use the XPS layer drop down to indicate which layer is affected by the rainwater cooling 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 CHAPTER 4 U VALUE CALCULATIONS 31 Figure 4 8 Data for rainscreen cladding correction HPA i A PA Pn 0 Pitch roof ceiling at rafter line SUapended ground floor Vall i Basement Floor MW Rainecreen cladding Basement Yall 4 5 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 dialogue opens 2 In the Element type section select Wall 3 Tick the Rainscreen cladding box New data entry boxes appear see Figure 4 8 4 Enter values for x and n Click OK If you do not have project specific values you can car
137. xy server box and enter the details for the proxy server 3 Click OK From now on the software will check for updates every time you run it and will prompt you to download a later version when it becomes available CHAPTER 2 PROGRAM BASICS 5 Figure 2 1 The Check for programme updates options Check for programme updates Use Proxy Server Proxy server Proxy username Proxy port fo Proxy password If you have turned the checking facility on but do not have an active internet connection when you start JPA Designer you will see an error message Socket errors If that happens simply click OK to dismiss the warning and carry on working as normal Once you have downloaded the new installation file from the web site you should install the new version of JPA Designer in exactly the same way as you installed the original version using the file jsetup981 exe If you have added materials to the user database see we recommend you take a backup copy of the files usercats txt and usermats txt before installing the new version of the software You should find both those files in the JPA Designer folder If you have issued EPCS we recommend you take a back up of the EPC database before in stalling an update You can find the location of the database by selecting EPC gt Database from the menu bar The new installation should preserve your existing database The database is only designed as a temporary store for the EPC you should use t
138. y multiplying the bridge psi value by its length The heat flow rate for the dwelling HTB is the sum of those heat losses for every bridge in the dwelling perimeter This full calculation method gives a more accurate result than the simplified method To use the full calculation method in JPA Designer 1 Tick the box Enter HTB value manually 2 Click the Calculate it button The Calculate HTB dialogue opens see Figure 6 10 3 For each type of bridge enter the Achieved linear thermal transmittance the Psi value and the Detail length The initial values in the Achieved linear thermal transmittance column are those of the accredited construction details 4 Click OK The dialogue closes and the HTB value is shown in the Htb box of the Walls Roofs amp Floors tab CHAPTER 6 SAP 2005 MODULE 69 Figure 6 10 The Calculate Htb dialogue Calculate Htb x Junction type Accredited linear Achieved linear Detail length m Linear thermal thermal thermal transmittance x transmittance transmittance Detail length CTR CTR DATKI 0 04 0 04 0 00 0 00 1 For these junctions half the value of linear thermal transmittance is applied to each dwelling Total 0 00 This i an externally supported balcony the balcony slab iz not a continuation of the floor slak where the wall insulation if continuous and not bridged by the balcony slab Cancel 6 11 Openings Openings windows and doors affect three as
139. zero 5 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 see Section 4 10 The main differences are 1 Before starting to print or create a PDF tick the Condensation risk box on U value mod ule status bar 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 6 SAP 2005 module 6 1 SAP The JPA Designer SAP module enables you to carry out calculations to demonstrate a dwelling complies with the requirements of Part L 2006 England and Wales section 6 of Technical Standards 2007 Scotland and Part L 2006 Northern Ireland The module also lets you issue energy performance certificates EPCs for new dwellings whilst the results of calculations may be used as part of assessments under the Code for Sustainable Homes The SAP module uses the SAP version 9 81 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 Heating 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 81 nor the Building Regulations We s

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