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JPA Designer User Manual 6.02 - for U

1. e In the Uvalue Construction dialogue use the light stee frame radio buttons to define is as warm or cold hybrid 55 CHAPTER 9 ADVANCED CALCULATIONS 56 e For a Cold or Hybrid construction 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 e For cold and hybrid elements some of the layers will be bridged by steel see for guidance on entering bridged layers 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 e In warm elements the air space between the studs should be entered as a bridged cavity with steel as the bridging material 3 Enter corrections for any mechanical fasteners which penetrate the insulation by completing the Correction for mechanical fasteners section in the Uvalue Con struction dialogue section 8 1 Use the first drop box to indicate which layer is bridged by the 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 9 2 Twin skin metal cladding and roofing Built up metal rootweall cladding using rail amp bracket spacer SCI P312 Built up metal roof wall Rail spacing mm 1200 0 Insulation is compressed by inner or
2. CHAPTER 20 VENTILATION 110 3 Tick This dwelling has been pressure tested To enter as built air pressure test data for a dwelling which has not been tested itself 1 Enter the average air permeability for the dwelling type in the Design q50 box 2 Set the radio buttons to as built 3 Do not tick This dwelling has been pressure tested JPA Designer will increase the entered pressure test value in the SAP and DER calculations by two Small developments Pressure testing is not required for developments of one or two houses provided the DER calculation is carried out using an air permeability of 15 m hm 1 At Source of q50 value select Assumed value 2 Tick the Small development box which indicates the dwelling is part of a develop ment of one or two dwellings If you do not tick the box the dwelling will fail its compliance checks The Design q50 box is now fixed at 15 m hm Using a calculated air permeability rate Where a dwelling is not subject to the air pressure testing requirements of Part L an air permeability value can be estimated from basic details of the construction and configu ration of the dwelling This is suitable for calculations for existing dwellings to Approved Document L1B 1 At Source of q50 value select Calculated The tab shows additional text boxes 2 Specify e the Type of construction e whether there is a draught lobby e the floor construction e the number of storeys The
3. Identity Figure 12 1 Sections To Print dialogue gt Page 1 of 20 Figure 12 2 Print preview controls CHAPTER 12 CREATING REPORTS 74 Use the tick boxes to select whether to print an additional page showing the details of the bridging calculations tapered layers and for condensation risk analysis the ISO moisture table for condensation analysis If you are a member of the BBA TIMSA U value accreditation scheme you can add the scheme logo to your reports If you want to include a watermark over the calculation tick Print watermark text You can also modify the wording angle and font size of the default text If you have several user identities see ection 2 8 select the one you want to use in the Identities list Click OK The Print preview window opens Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 The program will then create a PDF file of the calculation The name of the PDF file will include the JPA Designer file name and the 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 have specified see section 3 5 Note as Windows does not allow certain characters to be used in file names you should ensure the calculation names in JPA Designer
4. 6 When you have found the product you want click Close to close the Search dia logue When you have finished working on the database click the Close button to return to the main U value window CHAPTER 13 EDITING THE PRODUCTS DATABASE 79 13 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 tion 6 1 You can also use short codes to determine the order in which products and materials are presented within categories to speed up data entry for common construc tions To sort the database by short codes you must first assign short codes to the materials use a numbering system which matches the order in which you want the materials to appear Once you have assigned short codes you should click on the Sort on short code tick box in the Products database dialogue Figure 6 2 Part II Condensation risk 80 14 The problem of interstitial Condensation Condensation occurring within building elements interstitial condensation can cause substantial damage to the building fabric and reduce the effectiveness of thermal insu lation By carrying out condensation risk analysis CRA you can identify constructions which are likely to be at risk of condensation and where necessary make modifications to the design JPA Designer assesses the risk of interstitial condensation using the steady state method
5. FO Window Double glazed air filled low E En 0 2 1 44 1 70 Back PC u 12mm hard coat west WS 5 1 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PC u 12mm hard coat E ast Wi Ha Window Double glazed air filled low E En 0 2 0 76 1 70 Front PC u 1 2ra hard coat E ast Wwe A Window Double glazed air filled low E En 0 2 0 76 1 70 Front PC u 12mm hard coat E ast ws F 4d Window Double glazed air filled low E En 0 2 1 44 1 70 Front PC u 12mm hard coat E ast Wwe 5 5 Window Double glazed air filled low E En 0 2 3 99 1 70 Back PC u 1 2mm hard coat Wrest W S 5 6 Window Double glazed air filled low E En 0 2 1 26 1 70 Right PW C u 12mm hard coat South WWE Aa Window Double glazed air filled low E En 0 2 1 44 1 70 Front PC u 1 2mm hard coat E ast Wwe Ao Window Double glazed air filled low E En 0 2 1 44 1 70 Front P C u 12mm hard coat E ast Wwe 5 9 Window Double glazed air filled low E En 0 2 1 44 1 70 Front PC u 1 2mm hard coat E ast Ww BA WWwomdcims Nonhle alazed air filled lamw F Fns 4 1 Ad 17n Fark Patti 12mm ee E Mew Edit Duplicate Ti Delete Figure 22 1 The Openings tab 1 Double click on the opening in the list in the Openings tab The Edit Doors Win dows and Rooflights dialogue opens alternatively you can select the opening then click the Edit button 2 Make your changes then click OK To dele
6. 0 00 Second foor C party oon o oo 0 00 Third floor party pop o oo 0 00 Fourth and 3 party 3842 250 36 05 Party floor storey G other floors Total floor area a0 42 Dwelling valume 36 05 Total floor area r which iz iwing area Le is accessible or enter a fraction from the living room without opening doors or using stairs Total fixed lighting outlets Fraction of low energy lighting Appendis L 1 000 Front of dwelling faces Morth Application date 22 05 2014 16 00 0 4164 between 0 and 1 Low energy fixed lighting outlets ka al Figure 19 1 The Dimensions tab 104 CHAPTER 19 DWELLING DIMENSIONS 105 19 1 Dwelling area and volume The area and volume of the dwelling each storey are used throughout the SAP calculation for example to determine hot water and lighting usage and the rate of heat loss through ventilation The calculation requires the floor area of each storey and the average storey height e Floor areas are measured to the internal surfaces of the walls bounding the dwelling and shouldinclude built in cupboards accessible from the occupied area of the dwelling and all porches and conservatories which are heated and form part of the habitable space Exclude porches and conservatories which are unheated and thermally separated from the living space e The average storey height for the lowest floor of a dwelling is measured from fin ished floor surface to ceiling surfac
7. 6 Overheating 27 w w Cooling Renewables and special feature 8 1 Photovoltaic panel rarer Compliance and report 9 1 Checking compliance 9 2 Outputting SAP result 0 Multiple dwelling 28 29 4 1 Dwellings with two main heating system 129 131 133 134 135 135 136 137 137 139 140 141 142 144 145 146 147 154 155 156 157 158 159 159 160 160 162 162 163 164 164 165 167 CONTENTS 3 Exporting from VE 3 2 Consolidation of element 3 3 The export procedure 4 Completing the calculation 4 1 Dwelling dimension 4 3 Walls roofs and floor 4 5 Building service 5 Exporting several dwellings at once 5 2 Building service 6 Checking compliance 7 Reporting result 3 1 SAP version 800808848 T L VI 173 173 173 174 176 176 176 176 177 179 180 180 180 182 183 Part JPA Designer basics 1 Introducing JPA Designer Welcome to JPA Designer the design and calculation program from JPA TL Ltd JPA Designer can e carry out SAP calculations to SAP versions 9 92 9 90 9 81 9 80 and 9 70 to demonstrate compliance with the energy efficiency requirements of Building Reg ulations and Building Standards and as part of Code for Sustainable Homes CSH assessments e lodge On construction Energy Performance Certificates EPCs for dwellings in Eng land and Wale
8. Beam conductivity i mE Insulation thickness mm Screed Insulation conductivity rok Screed depth mm AO Insulation width rrr Screed conductivity wm Description x Cancel Figure 10 1 The Ground Floor Details Dialogue 10 1 Ground floor details The Ground Floor Details dialogue contains the data which describes the ground and the floor structure Figure 10 1 and has five sections e Floor type section 10 1 1 The choice of floor type will determine how other parts of the dialogue appear e Floor dimensions section 10 1 2 The size of the floor e Deck section 10 143 The construction of a suspended floor deck e Suspended ground floor details section 10 1 4 Additional information for sus pended floors e Edge insulation section 10 1 5 Details of any separate perimeter insulation Floor type JPA Designer recognises 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 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 and proceed as usual CHAPTER 10 GROUND FLOOR U VALUES 65 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 bloc
9. CHAPTER 20 VENTILATION 115 4 Select a product by clicking on it 5 Specify the number of Wet rooms excluding kitchen 6 If the ductwork is insulated tick the Insulated duct box 7 For decentralised mechanical whole house extract ventilation instead of steps 5 and 6 enter the number of fans in kitchens and other wet rooms Figure 20 4 agains the appropriate fan type 8 Click the Use the selected system button The dialogue closes and the summary of the system is displayed next to the Database radio button Ducted systems MVHR Duct 28 Manufacturer Air Excellent x Database date 27 1 2015 Database revision 373 Table 341 441 Available Ref Manufacturer id Status Manufacturer Brand Model ist Year Made Final Year Made Duct type Air Excellent AE35 SSS Figure 20 6 The MVHR Duct dialogue The configuration of ductwork will affect the efficiency of ducted systems as rigid ducts are more efficient than flexible ducts this is reflected in the in use factors for ductwork Semi rigid duct should be treated as flexible ducts unless they have been demonstrated to work as well as rigid ducts and are listed in the PCDF To add a semi rigid duct to the calculation e Tick Duct from database Figure 20 2 e Click Lookup The MVHR Duct dialogue opens Figure 20 6 e Select the Manufacturer CHAPTER 20 VENTILATION 116 e Select a duct from the list shown for that manufacturer e Click Use the se
10. Click the Apply code button for the module The program copies the code into the Key code boxes for the module If you have bought several modules repeat the steps for each one 2 4 On line licence checking JPA Designer checks the validity of your licence for a module the first time you open a calculation after the the program has started It does this by contacting our on line licensing database and checking the expiry date for module The process only looks for the company name and checks the licence status and expiry date on the database CHAPTER 2 GETTING STARTED File Edit Insert Options EPC Help ma CC i Ei E amp Prit ga T Od 22h 2m 28s E A blank project Figure 2 1 The Project Manager window U value product details Tour company name Our Company name U value key code OO0U agog agag ano opo SAF product details Tour company name our Company name SAF kep code ogag aoga aga OO00 agad PY product details Tour company name our Company name PY key code agga aog ogad OO00 agad IF you have recewed your keycode by email you can copy and paste it into this box and press the Apply button 1245 8901 23456 7890 Apply U value key code Apply SAP key code Apply PY key code Call JPA on 440 0191 267 0031 to buy the software and obtain a Rey Code Figure 2 2 The User Registration dialogue CHAPTER 2 GETTING STARTED 8 e If the check is successful and the licence is va
11. Dwelling has two main heating systems Main heating system 1 Fraction 0 50 Main heating system 2 Main heating system Both systems heat whole house Group Central heating systems with radiators or underfloor heating 1 D L Figure 24 2 Configuring a dwelling with two main heating systems To specify two heating systems 1 Tick Dwelling has two main heating systems The program now displays a pair of radio buttons Main heating system 1 and Main heating system 2 Figure 24 2 2 With Main system 1 selected enter the proportion of the dwelling s space heating demand which is provided by that system in the Fraction box the fraction should be in the range 0 0 1 0 3 If both systems heat the whole house tick the box Both systems heat whole house This affects the treatment of the hot water system 4 If the systems share the same pump tick System 2 uses System 1 s pump This affects electricity use and heat gains for pumps 5 Specify the first system in the Primary heating tab 6 Click Main system 2 and specify the second system in the Primary heating tab You can always switch between the systems using the radio buttons the large number at the top right of the Primary heating tab indicates which of the two systems you are working on M Setting the second system for hot water only For large houses there may be a dedicated boiler or water heater for hot water This can be specified in SAP 2012 by setting
12. Figure 15 1 1 On the Edit menu click Environmental conditions CHAPTER 15 CONDENSATION RISK ANALYSIS IN JPA DESIGNER 85 2 Make sure the Use 2003 Condensation Method is ticked see for a de scription of the previous method 3 Select the location of the building from the Building location list The Ext T and Ext RH columns will be completed If you have site specific data you can type values directly into the table 4 For a naturally ventilated building e Tick Calculate internal conditions based on external conditions e Set the Climate to Maritime e Select the humidity class in the Internal humidity class list The Int RH column is completed e 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 e Set the Risk level from the list Selecting a return period will make the external conditions more onerous with longer periods being harsher than shorter ones 5 For a conditioned building e Tick Use design data for internal conditions e From the list select a set of internal conditions If you cannot find a suitable dataset in the list you may need to create the dataset before beginning analysis see bection 15 2 6 Click OK to accept the data and close the dialogue Table 15 1 Humidity classes Class Building type Relat
13. Figure 3 6 To insert a new U value calculation based on a template Category Standard eye ess J Standard Roof warm flat New U value from Template Figure 3 6 The template selection controls 1 In the Categories list select the type of template you want That may be a manufac turer s category one of the default categories or a template group you have created previously 2 In the Templates drop down list pick the template you wish to use 3 Click New U value from Template The Description dialogue opens 4 Edit the name of the template to suit your project or accept the default name Once you are ready click OK 5 A new U value calculation is added to the project 6 You can now open and edit the calculation by double clicking on its name in the Project Manager list Creating user defined templates You can create templates from your own U value calculations by saving them in JPA Designer template files which have the file extension JTF You can have several different template files which allows you to sort the calculations into groups you might have one If you are a manufacturers of construction materials you can add U value calculations which include your materials into the set of templates which is distributed with JPA Designer Offering U value cal culations with your materials makes it easier for designers to include them in U value calculations and specifications and helps to ensure the materials ar
14. Setting a heat source for community heating hot water Heat sources Community heating and hot water schemes can be fed by a variety of heat sources in cluding conventional boilers heat pumps combined heat and power systems and even geothermal The Heat sources box lists the sources for domestic hot water Figure 23 7 sources can be added and edited using the buttons next to the box e the New button which opens the Heat source dialogue ready for new data e the Edit button which opens the Heat source dialogue showing the selected heat source e the Delete button which removes the selected heat source The Heat Source dialogue Figure 23 8 requires the type of heat source selected from the Heat source drop down e the fuel selected from the Fuel drop down e the proportion of the total energy load provided by that source Enter a fraction between 0 and 1 in the Heat fraction box the efficiency of that heat source Enter as a percentage in the Efficiency box For most sources the efficiency will be less than 100 but for heat pumps the effi ciency may be considerably higher 23 10 Solar panels Solar panels use sunlight to pre heat water for the domestic hot water system Guidance on including solar panels in the calculation is given in Appendix H of the SAP documen tation Where possible data from the panel s test certificate should be used Where a dwelling has solar panels specify CHAPTER 23 WATER HEATI
15. any of the other settings 1 In the Openings tab click on the first opening you want to change Press and hold the lt Shift gt key then click the last opening to change Those two openings and all the ones between will be selected 2 Click Change U value of selected 3 In the Change Multiple U values dialogue Figure 22 4 enter a new U value and click OK The U values will be set to the new value 23 Water heating Dimensions Ventilation Walls roofs amp floors Openinga Water heating Primary heating Secondary heating Overheating amp Cooling PY amp Alt Tech Source of domestic hot water Hot water storage tank E Plate heat exchanger in Community Heating Hot water tank E Total water use of not more than 125 litres person day Storage tank insulation Thickness mm Yolurne I 300 0 Factory Declared loss factor if known kh da Solar panel details saarele e Aperture area of collector het rfl 3 56 Evacuated tube collector enclose collector efficiency Tp 0 78 Flat plate collector Collector heat loss coeffficient di 3 91 Unglazed 2nd order collector heat loss coef a 0 01200 Pitch Dedicated solar storage litres 300 00 C Horizontal 60 degrees 30 degrees C Vertical E Separate solar cylinder F Declared values 45 degrees W Solar powered pump Showers e Hot water tank heater Single immersion heater C From
16. defined in ISO 13788 2012 which uses mean monthly temperatures and relative hu midities to assess the risk of interstitial condensation over a twelve month period The method provides a general assessment of suitability of the construction but does not ad dress air movement within the construction nor does it take account of the effects of capillary moisture transfer 1 For further information on the causes and effects of condensation and guidance on reducing problems see BS 5250 2011 Code of practice for control of condensation in buildings ISO 13788 2012 Hygrothermal performance of building components and building elements Internal surface temperature to avoid critical surface humidity and interstitial condensation Calculation methods 81 15 Condensation risk analysis in JPA Designer Condensation risk analysis determines whether condensation is likely to occur at the interfaces between the layers of material which make up the construction Using the hygrothermal properties of the materials section 15 1 and the environmental conditions section 15 2 the program looks at each interface in the construction and calculates e the amount of condensate deposited or evaporated during each month of a year 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 You can then use the results to assess the suitability of the con
17. doors and rooflights the water heating system the primary and secondary heating systems details of any photovoltaic cells or other low carbon technology 18 3 Carrying out a SAP 2012 calculation Carrying out a SAP 2012 calculation using JPA Designer is straight forward The main SAP window shows the on going results of the calculation and the compliance status of the dwelling while you enter data in the SAP Worksheet Values dialogue Once you have finished entering data you can print off the results or make adjustments to the data The main steps are 1 2 Create a new SAP 2012 calculation section 3 7 Open the calculation in the SAP module section 3 9 3 Enter the Project Information section 18 5 V A Open the SAP Worksheet Values dialogue and enter the dwelling data section 18 6 Check the compliance status on the main SAP window section 18 4 and make any necessary changes Produce print outs or PDF files of the calculation reports section 29 2 Save your project section 3 5 18 4 The SAP window The SAP window lets you access the SAP menus and tool bar and displays the results of calculations Figure 18 1 The main features are The menu bar The SAP 2012 toolbar the buttons give direct access to key program functions and to the tabs on the SAP Worksheet Values dialogue The status indicators which show how much data you have entered for each section of the calculation see b
18. e The program calculates the Thermal resistance in m K W e Vapour resistance enter in MNs g Membranes Membranes such as vapour control layers or vapour open roofing underlays are treated as having no thermal resistance The only property they have is their vapour resistance Membranes require the following information e Type select Membrane e Description type a description of the layer this will appear on the report e Vapour resistance enter in MNs g amp Membranes with low emissivity surfaces Membranes have no direct effect on thermal calculations However a membrane which has one or two low emissivity faces may improve the thermal performance of a construction by increasing the resistance of adjacent cavities that is addressed in the calculation by changing the resistance of the cavities not the membrane Thermal insulation The European product standards for factory manufactured thermal insulation require the thermal resistance values of the applicable insulants be rounded down to the nearest 0 05 m2K WE 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 mate rial dialogue The original value for thermal resistance will appear in the Edit material dialogue e g 2 348 m K W while the U value window will show the rounded value e g 2 30 m K
19. means hold down the lt Alt gt key while pressing the lt F gt key Bold type indicates parts of JPA Designer s screen displays e g the Ventilation rate dialogue Menu gt option indicates an option in a menu on the program s menu bar e g Select Edit gt Primary heating system means click on the Edit menu and select Primary heating system from the list This manual uses the following special terms Dialogue dialogue box a small window which displays text boxes or buttons for entering data Radio button a set of two or more related buttons you can only select one at a time Tick box a box which lets you turn a setting on ticked or off not ticked Text box an area on a dialogue in which you can type words or numbers List a box on a dialogue which can be expanded to show a number of pre set options usually by clicking an arrow on the right hand side of the box Many functions of JPA Designer can be accessed using either the menus or the toolbars also some may also have keyboard shortcuts To avoid repetition this manual refers only to the menus 1 2 Getting help 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 for instructions and see if that resolves the problem e Check the forum and FAQ on our web site http forum techlit co uk to see if the problem is addressed there
20. 0 10 7 24 0 Oct 20 0 63 5 9 1 25 0 Hov 20 0 Bi 4 1 26 0 Dec 20 0 Be 2 2 5 o 0 x Cancel Figure 15 1 The Environmental conditions dialogue 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 For fully conditioned buildings it is appropriate to use design internal conditions rather than derive them from the external conditions and moisture load e Risk level As the available climate data is based on mean values averaged over thirty year periods there will be some years which have better conditions than the mean and some years which will have worse It is possible that constructions which are predicted to be free of condensation in average conditions will suffer condensation in colder and more humid years BS 5250 2011 gives a method for testing the likely effect of worse than average years by means of risk years with corrections to replicate the worst conditions likely over five ten twenty and fifty years The appropriate return period for a calculation will depend on the sensitivity of the project to condensation for example a computer data centre might require a fifty year return period while a house might only merit a five year return period The data is entered using the Environmental conditions dialogue
21. 21 WALLS ROOFS AND FLOORS 123 Calculate Htb amp a mo Junction type Accredited Achieved Detail length Linear thermal linear thermal linear thermal m transmittance x transmittance transmittance Detail length A Wim Wim WK E1 Steel lintel with perforated steel base plate D 0 000 E1 E10 Eaves insulation at ceiling level D 0 060 0 120 0 000 0 000 E10 E11 Eaves insulation at rafter level D 0 040 0 080 0 000 0 000 E11 E12 Gable insulation at ceiling level JO 0 240 0 480 0 000 0 000 E12 E13 Gable insulation at rafter lewel JO 0 040 0 060 0 000 0 000 E13 E14 Flat roof D 0 000 0 080 0 000 0 000 E14 E15 Flat roof with parapet D 0 000 0 560 0 000 0 000 E15 E16 Corner normal D 0 090 0 180 0 000 0 000 E16 E1 Corner inverted internal area greater than external area D 0 090 0 000 0 000 0 000 Elf Total 0 000 T from Table K1 A from approved source N calculated from non approved source D default E Junction with an external wall P Junction with a party wall R Junction within a roof or with a room in roof O Other type 1 For these junctions half the value of linear thermal transmittance is applied to each dwelling This is an externally supported balcony the slab is not a continuation of the floor slab where the wall insulation is continuous and not bridged by the balcony slab a Figure 21 3 The Calculate Htb dialogue e the accredited
22. 2nd main heating system Dual immersion heater From secondary heating system Boller feed Summer immersion heater ba Fuel z IM Cylinder in heated space IM Cylinder thermostat Override heat pump database values C DHW vessel within micra CHP J Separate timer for domestic hot water Primary insulation Uninsulated primare pipework A Direction Overshading South Heavy 280 sky blocked dia an Significant gt B0 80 sky blocked 0 Eastwrest i MENW O Modest 20 60 sky blocked gt North None or very little lt 20 sky blacked Md Required by the Building Regulations Figure 23 1 The Water heating tab showing settings for a hot water storage tank 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 Figure 23 1 The first step is to select the type of water heating system using the Source of domes tic hot water drop box Once you have made a selection the program will display the appropriate data entry fields The hot water sources are e Hot water storage tank e Instantaneous water heating at point of use e Combination boiler 133 CHAPTER 23 WATER HEATING 134 e Community heating scheme e Mul
23. Dual electric immersion heater WLBT g i A SORT NE i Boiler feed From 2nd main heating system Summer immersion heater Heat pump heat exchanger area 0 00 Hot water only boiler CPSU Thermal store in airing cupboard Yez No Fuel ka CPSU Winter operating temperature CPSU Cylinder size Thermal store or CPSU has seperate timer for heating store gF 90 C 9PC 2r litres S00 litres 330 litres 7 Cylinder in heated space Other C 85 Other litres 210 0 Cylinder thermostat Overide heat pump database values DHW vessel within micro CHF Insulated primary 4 Separate timer for domestic hot water Figure 23 6 Data entry for CPSU hot water supply 23 7 Combined primary storage unit CPSU A Combined Primary Storage Unit provides hot water by means of heat exchanger within the primary store Enter the following data for the tank e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 Use the radio buttons and drop downs to indicate e whether the CPSU is in an airing cupboard e the winter operating temperature of the CPSU e the size of the CPSU cylinder Use the lower boxes to indicat
24. Htb may obtained by using the simplified calculation method with a y factor of 0 15 this represents the use of details which are not accredited con struction details and will give a poor result To use this method select Not accredited construction details in the Thermal Bridging section No other data is required CHAPTER 21 WALLS ROOFS AND FLOORS 126 21 3 Thermal mass There are three methods for entering data on the thermal mass of the building fabric 1 Set the value for all exposed party and internal elements The program calcu lates the thermal mass parameter TMP from those values and the areas of those elements the result is displayed in the TMP box This is the most accurate and straightforward method 2 Enter a TMP value which has been calculated elsewhere Tick User defined Ther mal Mass Parameter then enter the value in the TMP box 3 Use one of the three default thermal mass parameters Tick User defined Thermal Mass Parameter then select a thermal mass category from the Thermal mass drop down see Table 1e of the SAP 2012 document for definitions of the categories 22 Openings Openings in walls and roofs windows doors and rooflights affect three aspects of the SAP calculation e Heat loss assessed through the U value e Solar gain assessed through the g window value e Daylighting assessed through the type of glazing Data on openings is entered using the Openings tab of the SAP Worksheet
25. Insulation e Flooring such as particle board Omit e Hardcore beneath a groundbearing slab e Groundbearing concrete slabs with density greater than 1800 kg m e Thin floor coverings such as vinyl or carpet Table 11 1 Thermal conductivity of the ground Category Description Thermal conductivity W mk 1 clay or silt 1 5 2 sand or gravel 2 0 3 homogeneous rock Gio 11 2 Basement walls To complete a basement wall U value calculation you will need to know e The floor s Perimeter Area ratio P A e The thickness of the basement walls w metres e The average depth from the external ground surface to the basement floor h me tres Details of the insulation in the basement floor e The thermal conductivity of the ground 4 in W mK see Table 11 1 and annex G of BS EN ISO 13370 To calculate a basement wall U value CHAPTER 11 BASEMENT U VALUES 71 Ground Floor Details x Basement floor dimensions Basement Details for 150 13370 Pza 0 40000 Calculate it V h m 24 w m 0 300 Ferimeter m au Area m 100 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 ISO 13370 suggests you include the masonry wall 300ram thick with a conductryity of 1 Aim FE Calculation of basement WALL U values requires details of the basement FLOQA including any insulation and the Perimeter
26. SAP regions in Table 10 of the SAP 2012 document Where the dwelling does not have a full post code perhaps because it has not been assigned yet you need only enter the first block e g BT25 for the Location look up to work Project type Figure 18 4 item 11 defines whether the calculation is for a new build existing dwelling or conversion e Related party disclosure Figure 18 4 item 12 overrides the default disclosure for EPCs for that calculation SAP calculation options The bottom of the Project Information dialogue contains several calculation options e Treat low e glass coating as soft Figure 18 4 item 13 this is a legacy setting which affected calculations in SAP 9 70 and 9 80 1 It has no effect on SAP 2012 calculations e Enter gross opaque element areas item 14 the SAP 2012 calculation uses the net areas of walls and roofs after the areas of openings doors windows and rooflights have been removed If you select this option you can enter the gross areas of walls and roofs and the program will determine the net areas by subtracting the areas of windows and rooflights as they are specified If you change the setting of this box the software then close the Project Informa tion the program asks if you want to use that setting as the default value for future calculations You can only change this setting before you have started to enter data in the SAP Worksheet dialogue Once you have en
27. Screed conductivity You can set the default thermal conductivity of the screed in a beam and block floor construction on the Other tab of the Options dialogue in Project Manager Suspended floor you can enter a resistance for the deck or select a material from the database Figure 10 3 by clicking the database button the procedure for select ing the material is the same as described in section 6 1 The deck in a suspended floor will typically be timber boards or particleboard insulation between joists should be entered as a separate layer bridged by timber ection 7 4 CHAPTER 10 GROUND FLOOR U VALUES 66 Deck Resistance mkA Description YZ beams with ABC blacks Black Width mm 440 Thickness rm 100 LConductrvity amk 0 52 Beam Web width mm 60 Beam conductivity Wi mk 1 130 Screed Screed depth mm An Screed conductivity Wim 1 150 Figure 10 2 Defining a beam and block deck Deck Resistance mi K W 0 000 al Description Figure 10 3 Set the deck resistance for a suspended floor Suspended Ground Floor Details tor SO 13370 E rer 0 0015 him 0 225 wm 0 300 Uw werk 1 700 fw 0 050 lambda 1 500 Wms 5 000 Defaut P Help Deck underside surface resistance nek 0 170 Subfloor ground surface resistance mik 0 170 Resistance of insulation on ground Ag mkA 0 000 Figure 10 4 Entering the details for a suspended ground floor CHAPTER 10 GROUND FLOOR U VALUES 67 Suspended
28. Table 5 1 Thermal resistances Heat flow Element Internal resistance Rsi External resistance Rse Horizontal Wall 0 13 0 04 Upwards Roof 0 10 0 04 Downwards Floor 0 17 0 04 5 3 Light steel frame construction type U values for light steel frame structures have to be calculated using a special method which allows for the high thermal conductivity of steel The Light steel frame Construc tion Type section indicates whether the structure has a light steel frame and if so whether it is of warm or cold construction For non steel frame structures ensure Not a light steel frame construction is selected For instructions for calculating U values of light steel frame structures see section 9 1 There are very few conditions where it is necessary to set the emissivity to low 6 Working with layers Each U value calculation is built up by inserting layers which correspond to the different materials in the construction For example a U value calculation for a cavity wall would have a layer to represent each of e the outside surface resistance e the outer leaf of brickwork e the cavity e the cavity insulation e the inner leaf of masonry e the plaster finish e the internal surface resistance m a Y n ee ee Yr at L e f 4 Breather membrane 555250 5 Plywood sheathing a Newlayer will be 20 0 F Folythene 500 gauge jl 2mm 855250 inserted above yy polyethylene and Plasterboard 655250 below plywood
29. Values dia logue Figure 22 1 The tab lists the dwelling s windows doors and rooflights grouping them according to the building element in they sit You can enter each opening individu ally or you can group the openings on each face of the building into one area provided they have the same frame and glazing type The buttons below the openings list allow you to create edit and delete openings For each opening the data is entered using the Doors Windows amp Rooflights dialogue tion 22 1 To define a new opening 1 In the Openings tab click the New button The New Doors Windows amp Rooflights dialogue opens 2 Enter the data for the opening and click OK To duplicate an opening Duplicating an opening creates a new copy of the original opening which can then be edited as most openings will share the same glazing and frame type using the duplicate facility can speed up data entry 1 In the Openings tab select the opening you want to duplicate 2 Click the Duplicate button A copy of the opening is created 3 Double click on the duplicated opening to edit it To edit an existing opening 127 CHAPTER 22 OPENINGS 128 Dimensions Ventilation Walls roofs amp floors Upenings Water heating Primary heating Secondary heating Overheating amp Co No Element type Area U value Orientation Frame Ai gap o 2 w eC Aa So eee ei ay eae E AOIR AE
30. W By default rounding is on this is indicated by red text in the status bar of the U value window However as there may be occasions when you need to carry out calculations without rounding the feature may be turned off and on The series runs from BS 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 The standards state the value of thermal resistance R90 90 shall be counded downwards to the nearest 0 05 m K W and declared as Rp in levels with steps of 0 05 m K W CHAPTER 7 WORKING WITH MATERIALS 39 Round down thermal resistance of Insulation products to the nearest 0 OBrr kA Set vapour resistance of layers above vented cavity to zero use this option with estreme caution see 655250 1969 pg 6 for explanations amp limitations Figure 7 2 Controls for rounding of thermal resistance 1 On the Project Manager menu bar select Options Click on the Other tab Figure 7 2 Untick Round down thermal resistance to turn rounding off BR Ww N 7 3 Types of cavity JPA Designer recognises five types of cavity e clear cavities cavities with limited air exchange with outside and no thermal bridg ing e bridged cavities cavities with limited air exchange with outside and which are thermally bridged we
31. Water heating tab section 23 10 CHAPTER 23 WATER HEATING 137 23 5 Multi point gas water heater or heat exchange built into a gas warm air system Source of domestic hok water Multi pomnt gas water heater or heat eschange built into a gas warm air system Hot water tank Storage tank imsulatior Volume I 210 0 Factory Thickness mm Declared loss factor it Jacket 90 00 known kM heday Heat pump heat exchanger area Figure 23 4 Data entry for gas water heaters or heat exchangers 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 select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 Use the three lower boxes to indicate whether e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e there is a separate timer for the domestic hot water Use the Primary insulation list t
32. a return On each line the different items of data are separated by the pipe character with no spaces before or after the pipe The final character on every line is also a pipe The data items are e Item 1 whether the set is for internal conditions O or external conditions 1 e Item 2 whether the set is system data O or user data 1 e Item 3 a text description of the data set This appears in the Building location or internal conditions lists which are sorted alphabetically using the text description This item can start with the tilde character which does not appear on lists but controls the way in which items 4 27 are interpreted e Items 4 27 these are the monthly temperature and relative humidity figures Tem peratures should be entered in degrees centigrade and relative humidity as a per centage The order of the data depends on whether item 3 starts with a tilde If item 3 has a tilde the mean monthly temperatures should be entered in a sequence starting with January followed by the relative humidity figures starting with January so Jan temp Feb temp December temp Jan rh Feb rh etc If item 3 has no tilde the temperature and relative humidity values for each month should follow each other so Jan temp Jan rh Feb temp Feb rh etc e Item 28 the country code UK 0 Republic of Ireland 1 Australia 2 New Zealand 3 Asia 4 Middle East 5 e Item 29 applies to external env
33. at the same time there are two buttons in JPA Designer which allow you to copy settings from one opening to e all the other openings in the same dwelling or e all the other openings in the same project The buttons are found at the bottom of the Doors windows and rooflights dialogue Figure 34 11 Edit Doors Windows amp Rooflights ox Double glazing alr gap C 6mm Other O Wood O Metal 4mm thermal break Metal 20mm thermal break 12mm 12mm Vn P C u O Metal 8mm thermal break Metal 32mm thermal break 16mm O Metal no thermalbreak O Metal 12mm thermal break Use user defined frame factor user defined frame factor 0 00 U value wneK 1 70 Source of U value ui S Default g window Yalue ight transmittance is determined by BFRC data 0 72 glazing type single double or triple so ei 2 Manufacturer make sure you select the correct glazing WE Overhang used for B90 Left front C E Ri i AE gt Right front overheating assessment Wwidth min Depth mm Blinds curtains amp extemal shutters hours closed Uvershading O Heavy L80 sky blocked O More than average 60 30 sky blocked Average or unknown 20 60 sky blocked D Yer little lt 20 sky blocked l Copy these values to all this buildings windows Copy these values to all the building s in this project Figure 34 2 Import status for the sections of the Doors windows and rooflights dialogue
34. carry out an initial calculation using the default values for x and n CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 53 8 5 Elements separating heated and unheated spaces The rate of heat loss through an element which separates a heated space from an unheated space will be lower than that through an identical element which separates a heated space from outside as the relatively warm air within an unheated space acts as a thermal buffer The combined method for calculating U values allows for this effect by assigning a ther mal resistance to the unheated space The resistance is based on e the surface areas of the elements which separate the heated space from the unheated space Ai measured in m e the surface areas and U values of the elements which separate the unheated space from outside Ae measured in m and Ue measured in W m K e The volume of the unheated space V measured in m e The ventilation rate n measured in air changes per hour ach When measuring Ai and Ae you should include walls and intermediate floors such as that over an integral garage but exclude ground floors Element Details Unheated Spaces print Report Notes Elements separating heated and small unheated spaces see 150 6946 sec 5 4 Total area of all elements between the internal environment and the unheated space Ai AAN m Ventilation rate of the unheated space n 0 00 air changes per hour Volume of
35. 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 Options dialogue go to the Other tab 2 Tick Set vapour resistance of layers above vented cavity to zero 3 Open the condensation risk calculation 4 Double click on the cavity layer 5 In the Edit material dialogue set the cavity type to vented cavity The program will set the vapour resistance of the layers outside the cavity to zero Part IV SAP 2012 94 18 The JPA Designer SAP 2012 module 18 1 Overview of the SAP 20012 module The JPA Designer SAP 2012 module enables you to carry out calculations to demonstrate a dwelling complies with the requirements of Part L 2013 England and Part L 2014 Wales 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 2012 module uses the SAP 9 92 methodology to e calculate the Target Fabric Energy Efficiency TFEE and Dwelling Fabric Energy Efficiency DFEE e calculate the Target Carbon Dioxide Emission Rate TER and the Dwelling Carbon Dioxide Emission Rate DER e check for compliance against a number of other criteria set out in Approved Docu ment L1A and in the Domestic Building Services Compliance Guide 2013 edition Whilst this section of the manual gives instructi
36. change the printer settings by selecting File gt Printer setup from the menu bar 30 Multiple dwellings E Project Manager E ri Available SAP Y98799 D welling Dwellings in this multiple dwelling Dwelling 1 in 2015 01 08 500 Ch Dwelling 3 in 2015 01 08 500 Ch Dwelling 2 in 2075 01 08 500 Ch Dwelling 4 in 2015 01 08 500 Ch Dwelling 5 in 2015 01 08 500 Ch Dwelling 6 in 2015 01 08 500 Ch Total floor area 227 00 m Average TER 30 79 Average DER 2 05 Compliance Fail Average TFEE 39 00 Average DFEE 201 75 Compliance Fail Figure 30 1 The SAP window for a multiple dwellings calculation The comparative compliance methods specified in Approved Document L1A can make it more difficult for mid floor flats and mid terrace houses to pass even with the same fabric and services standards as ground and top floor flats and detached houses The multiple dwelling calculation allows you to test the compliance on a whole block or terrace using average TFEE DFEE and TER DER values for the dwellings which comprise the block or terrace The multiple dwellings calculation enables end terrace houses or ground and top floor flats to compensate for mid floor flats or mid terrace houses JPA Designer includes a multiple dwelling feature to carry out the average TER and DER calculations The Multiple dwellings SAP window has two panes the left hand one labelled Available SAP V99 Dwellings lists all the SAP 9 92 dwellings within the
37. depend on the Group Sub group System and Fuel settings The SAP 2012 document contains descriptions of control options in section 9 4 Broadly speaking in JPA Designer the control options towards the bottom of the list will do better than those at the top of the list For dwellings with a floor area greater than 150 m the heating controls must include time and temperature zone controls amp New for SAP 2012 specifying heating controls In SAP 2012 it is theoretically possible to select the heating controls from the PCDF see Section 24 2 to give more accurate results This would be done by setting the Heating controls then using the select button to the right of the list to open the Heating Controls Database dialogue then selecting the Manufacturer and Model of controls At the time of writing 2015 01 07 there are no controls in the database to select The efficiency of some heating systems may be improved by load or weather compen sators These may be specified using the load weather or enhanced load compensator boxes amp New for SAP 2012 specifying compensators In SAP 2012 it is possible to select the load or weather compensator from the PCDF see Section 24 2 to give more accurate results using the Load weather compen sator select button then in the Heating Controls Database selecting the Manufac turer and Model of controls Central heating systems with radiators or underfloor heating This group covers
38. floors using the combined method BS EN ISO 6946 2007 and also calculates U values for ground floors to BS EN ISO 13370 2007 e U value 2014 Professional has the functionality of U value 2014 and also performs condensation risk analysis using the methods set out in BS EN ISO 13788 2012 U value calculations are carried out in the U value module by 1 Entering project information section 4 1 2 Entering key information about the building element such as the element type e g wall floor roof and any special construction types e g metal frame ter 5 3 Defining the different layers which make up the element chapter 7 4 Adding correction factors for factors such as mechanical fasteners and air gaps in insulation layers chapter 8 5 Printing calculation results or creating PDF files of the results for emailing chap ter 12 You can test the effect different materials have on the thermal performance of the element by using the variable layer feature section 9 4 4 1 U value project information JPA Designer can store client and project details for each calculation and then add them to calculation reports You can either the copy client and project details which you en tered in the Project Information dialogue in the Project Manager window or you can enter new data in the U value modules You can also save and re use client data see section 3 3 In either case you can select the Region for the calculatio
39. ground floor details In a suspended ground floor heat will be lost through the floor deck and ground it will also be lost through the walls of the sub floor void and as a result of ventilation of that void JPA Designer calculates those latter heat losses using the data in Suspended Ground Floor Details section Figure 10 4 The values required are e E the area of ventilation openings in the walls of the sub floor void measured in Square metres per metre m m e h the height of the upper surface of the floor above external ground level in metres The default value of 0 225 m represents three courses of brickwork e w the thickness of the walls at the floor perimeter in metres e Uw the U value of the walls of the sub floor void calculated according to BS EN ISO 6946 in W m K This value can be obtained from a separate calculation in JPA Designer e fw the wind shield factor see Table 10 1 This converts the average wind speed V into the wind speed at ground level e Lambda the conductivity of the type of ground use 1 5 W m K for clay or silt 2 0 W m K for sand or gravel and 3 5 W m K for homogeneous rock e V the average wind speed at 10m above ground level in m s BR 443 recom mends a default value of 5 m s for the UK 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 The surface re
40. later releases with characters coming earlier in the name being more important that later ones so 4 05a1 will be more recent than 4 04c2 and 4 05b1 more recent than 4 04a4 The three digit Build number indicates a minor change in a version shows the About dialogue for JPA Designer together with the version number on the web site in this case the software is up to date as both version numbers are the same The process for updating the software is identical to that of originally installing il see section 2 2 You can find details of the changes in each version on the announcements section of our A eb forumE 2 6 Opening and closing JPA Designer To open JPA Designer e Select Programs gt JPA Designer gt JPA Designer from the Windows Start menu CHAPTER 2 GETTING STARTED Download JPA Designer Version 4 04b1 build 017 JPA Designer Version 4 0461 Build 017 SAP Version 9 80 9 81 amp 9 90 Silverleaf Software Ltd JPA Designer Copyright JPA Technical Literature Figure 2 3 The About dialogue showing the version number What would you like to do Add a new SAP 2012 V9 92 calculation to the current project Add a new SAP 2009 V9 90 calculation to the current project Add a new U value calculation to the current project Create a new project Figure 2 4 The new splash screen for JPA Designer CHAPTER 2 GETTING STARTED 10 A splash screen Figure 2 4 appears when you open JPA Des
41. linear thermal transmittance which represents the q value for the corresponding accredited construction detail e the achieved linear thermal transmittance for the junction which is the w value used in the calculation e the length of the detail in metres e the rate of heat loss through the junction in W K When you first open the Calculate Htb dialogue the program adds one of each junction type in the junction list with the length at zero and the w value set to that of the corre sponding accredited detail The buttons at the bottom of the dialogue allow you to Add Edit and Delete junctions The Flush button can be removed unused junctions from the standard set To use the Calculate Htb dialogue 1 In the Thermal Bridging section select Enter HTB value manually 2 Click the Calculate it button The Calculate Htb dialogue opens 3 Edit the length of each junction which is found in the dwelling and adjust the w value if necessary CHAPTER 21 WALLS ROOFS AND FLOORS 124 Junction Junction type Sill i For these junctions half the value of linear thermal transmittance is applied to each dwelling 2 This is an externally supported balcony the balcony slab is not a continuation of the floor slab where the wall insulation is continuous and not bridged by the balcony slab 3 Value is applied to each dwelling Description stone sill Achieved linear thermal 9 080 Detail length m 10 105 transmittance W mK S
42. outer sheet Rail width mm 40 0 Layer bridged by rail Figure 9 2 Built up metal wall or roof cladding The additional heat loss resulting from thermal bridging in twin skin metal roofing and cladding systems formed with rails and brackets requires a modification to the standard combined method JPA Designer uses the method described in the Steel Construction Institute research paper SCI P312 which takes account of e The bridging effects of the rail and the air spaces around the rail e The point bridging produced by the brackets 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 or cladding CHAPTER 9 ADVANCED CALCULATIONS 57 10 12 13 Create and open a new U value calculation Enter any project information In the U value Construction dialogue select either wall or flat roof Do not tick the Built up metal roof wall box at this stage Click OK Enter the layers in the construction in the main U value window Enter the insulation in two layers the uppermost layer being the insulation which is bridged by the rails and the underneath 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 dis
43. rss Flat roof Emissivity High Low il eth a bi Inverted Outward 0 04 Internal Surface Emissivity High Low Surface Resistance m2K W Outward 0 10 Pitch roof horizontal ceiling Floor other than ground floor Light steel frame Construction Type BRE Digest 465 Solid ground floor Not a light steel frame Construction Pitch roof ceiling at rafter line Suspended ground floor Wam Frame i Wall C Basement Floor E Rainscreen dadding Basement Wal ainaani Element description Built up metal roof wall dadding using rail amp bracket spacer SCI P312 E Built up metal roof wall Layer bridged by mechanical fasteners r Mechanical fasteners T Edit New No perm 0 00 Fastener 9 9900 W mK Alpha oo m Cross gogog mm Recess 0 0 mm E Use point thermal transmittance a Geanee Figure 5 1 The U value Construction dialogue e Pitched roof with horizontal ceiling Typically a cold roof with the insulation applied between and over the ceiling joists You must enter the pitch angle of the roof measured from the horizontal This element type may also be used to model a roof with a horizontal ceiling but insulation at rafter line 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
44. section 8 4 e Floor other than ground floor A floor over an open space e g a parking bay or an unheated space e g an enclosed garage e Solid ground floor A floor which is contact with the ground across its whole area such as groundbearing concrete slab e Suspended ground floor A floor with a ventilated space below the floor deck such as a beam and block floor or timber joist floor e Basement floor e Basement wall CHAPTER 5 CONSTRUCTION DETAILS 30 You may also enter a description for the element in the Description box or select one from the drop down list The description does not affect the calculation 5 2 Internal and external surfaces U value calculations take account of the heat flow at the internal and external surfaces of an element by means of the internal and external 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 sets the surface resistances based on the element type section 5 1 and the emissivity of the surfaces using the values from BS EN ISO 6946 shown in ble 5 1 The default emissivity setting is high emissivity which suits the great majority of facing materials You can of course replace the default resistances with your own values in the very rare cases where that is necessary
45. software then calculates an air permeability rate based on the SAP defaults CHAPTER 20 VENTILATION 111 20 2 Ventilation openings In the Ventilation section enter details of the ventilation openings for the dwelling Use the boxes to enter the numbers of e Chimneys vertical ducts for combustion gases with diameter greater than 200 mm e Flues vertical ducts for combustion gases with diameter less than 200 mm Chimneys and flues should be assigned to the main or secondary heating systems or another appliance There is no need to enter room sealed and balanced flues to heating appliances as they do not affect air movement in the occupied space e Flueless gas fires 20 3 Sheltered sides The rate of air infiltration resulting from the wind is affected by the number of exposed sides of the dwelling SAP 2012 therefore adjusts infiltration according to the number of sheltered sides a dwelling has A sheltered side is e a party wall e aside which is sheltered by neighbouring buildings The exact conditions are de scribed in section 2 5 of the SAP 2012 document The number of sheltered sides is entered in the Sheltered sides box If the local conditions are unknown use a default value of two sheltered sides 20 4 Ventilation type There are two steps to defining the ventilation arrangements for the dwelling 1 Use the Ventilation Type radio buttons to specify the type of ventilation in the dwelling see section 2 6 o
46. system specify the number of mixer showers to which the system is linked in rooms with a bath and without a bath do not count instantaneous electric show ers in the number of mixer showers Click OK To specify storage WWHRS In the PV amp Alt Tech tab tick WWHRS and click the Lookup button The WWHR Database dialogue opens Figure 28 2 Use the Manufacturer drop down to select the manufacturer then highlight the specified product in the list and click Select as storage system In the Storage System 1 section enter the Total number of baths and showers the Number of baths and showers whose waste water Is routed through the WWHRRS the Dedicated WWHRS storage volume in litres Click OK CHAPTER 28 RENEWABLES AND SPECIAL FEATURES 162 FGHRS Database Manufacturer Alpha Database revision 302 Available Ref DE Entry Date Manufacturer id Manufacturer Brand Model Qualifier ist Year Made Fi 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS5 50 P V 1 2008 60021 2010 Apr 06 12 05 20029 Alpha Heating Innovation Ltd Alpha FlowSmart F5 50 PV1 2008 al 60020 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 PV1 2008 al 60019 2010 Apr 06 12 05 20029 Alpha Heating Innovation Ltd Alpha FlowSmart F5 25 PV1 2008 cl 60014 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 50 2008 a 60013 2010 Apr 06 12 05 20029 Alpha Heating Innovation
47. the default values are significantly worse than manufacturers data If the ventilation system consists of intermittent extract fans or passive vents in bathrooms and toilets enter the number of intermittent fans or passive vents Use defined performance data To enter user defined performance data 1 Select User defined at Source of mechanical ventilation parameters 2 Click Enter details 3 Complete the details required for the specified system in the User Defined Mechan ical Ventilation dialogue The parameters required for each ventilation type are e For balanced whole house mechanical ventilation Figure 20 3 Brand and model of system Duct type and whether or not the duct is insulated CHAPTER 20 VENTILATION 113 Brand Model Flexible Rigid SFP 0 000 Wetrooms exduding kitchen 0 Effidency of heat recovery 4 0 000 Figure 20 3 User defined data for balanced whole house mechanical ventilation ed mechanical whole house extract ventilation Kitchen Other wet rooms SPF Number off SPF Number off in room 0 000 0 S o 000 o in duct 0 000 0 ss 0 000 0 through wall 0 000 0 S 0 000 i Figure 20 4 User defined data for decentralised mechanical whole house extract venti lation Specific Fan Power SFP Number of wet rooms excluding the kitchen Efficiency of heat recovery e For positive input ventilation from outside The duct configuration e For positi
48. the default values offered in the Thermal mass list Tick User defined Thermal Mass Parameter Set the Thermal Mass to low medium or heavy Those categories are defined in Table 1e of the SAP 2012 document e Junction heat loss data this is currently not imported from VE It should be entered either using the default y value of 0 15 for the dwelling or by entering the length and psi value for all junctions in the dwelling using the Calculate Htb dialogue which is accessed from the Calculate it button 34 4 Openings D Top root el LoG Average or unknown 20 60 sky blocked Unspecified Very httle lt 20 4 sky blocked Copy these values to all this Buildings windows Copy these values to all the building s in this project Figure 34 1 The Copy buttons for openings The import process brings in much of the data about openings For each opening in the dwelling that includes e the element the opening belongs in e its area e its U value e the glazing type The remaining data which has to be entered in JPA Designer is the frame type the width of the air gap in double glazing e the g window value a measure of the transmission of solar energy through the glazing the over shading data on blinds curtains and internal shutters CHAPTER 34 COMPLETING THE CALCULATION 178 As setting these items can be time consuming particularly if you are working on several dwellings
49. 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 7 1 Basic characteristics The Material section contains the basic data about the layer including e Description the name of the material or a description which appears in the cal culation e Code and Category used with the database to sort or enter materials but not in general use Thickness the cross sectional thickness of the layer measured in mm e Thermal conductivity the rate of conduction heat transfer through 1m of the ma terial measured in W mK Usually referred to as the lambda value e Thermal resistance the resistance to heat transfer provided by the layer measured 2 in m K W e Vapour resistivity the rate of transfer of water vapour through 1 m of the material measured in MNs gm e Vapour resistance the resistance to water vapour provided by the layer measured in MNs g The following two values are only required for K value calculations Density the mass per cubic metre of the material measured in kg m e Specific heat capacity the amount of energy required to raise the temperature of one kilogram of the material by one Kelvin equivalent to 1 degree Celcius kJ kg The two directional heat flow settings are not used for calculations in the UK 7 2 Types of material Lay
50. the unheated space W 0 00 m a kis the element number Ae kis the area of element k between the unheated space and the external environment in m2 Ue k is the thermal transmittance of element k between the unheated space and the external environment in W m2 K Figure 8 8 Data entry for elements separating heated and unheated spaces To allow for unheated spaces 1 In the U value Construction dialogue click on the Unheated Spaces tab Figure 8 8 2 Enter e The area Ai e The ventilation rate n Use a ventilation rate of 3 ach if the actual ach is not known e The volume of the unheated space V CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 54 3 For each of the elements separating the unheated space from outside enter e The area Ae k e The U value Ue k Ue k can be calculated in a separate calculation in JPA Designer Use a value of 2 W m K if the details of the element is not known Using the pre 2007 method The 1997 edition of BS EN ISO 6946 included a different method to calculate the resis tance of an unheated space It is possible to use the older method in JPA Designer 1 In the Edit Construction dialogue select the Unheated spaces tab 2 Tick Use BS 6946 pre 2007 method 3 In the Ai box enter the total area of all elements separating the internal environment from the unheated space 4 In the Ae for BS 6946 Pre 2007 method box enter the total area of all elements separati
51. there is no need to inserting this data With the changes made click either Copy these values to all this building s windows or Copy these values to all the buildings in this project Click OK 34 5 Building services The parameters for building services are different in VE and SAP so you must enter build ing services data in JPA Designer following the guidance in the SAP section of this man ual Water heating chapter 23 Primary heating chapter 24 Secondary heating chapter 25 Overheating chapter 26 Cooling chapter 27 Renewables chapter 28 35 Exporting several dwellings at once One of the benefits of the VE import is the ability create SAP calculations for many dwellings at once However the services and other parameters have to be set in JPA Designer to complete the calculations To speed up that process JPA Designer includes a number of functions which can copy data between several dwellings 35 1 Openings As ection 34 4 explains incompatibilities between the definitions of openings in VE and JPA Designer means several of the items for openings have to be set in JPA Designer As each dwelling in a project will have six or more openings that could be a time consuming process but there are two buttons on the Edit Doors Windows and Rooflights which can speed up the process e Copy these values to all this buildings windows using this button copies the fol lowing items to all other other windows in
52. up two heating systems and assigning the hot water only system as system 2 The fraction for system 1 is then set to 1 00 Then in the Water heating tab set the Source of domestic hot water to Hot water storage tank In the Hot water tank heater section tick From 2nd main heating system This should not be confused with secondary heating appliances such as gas fires or wood burning stoves which are designed to provide additional heat for individual rooms CHAPTER 24 PRIMARY HEATING 146 24 2 Efficiency data for heating systems There are three possible sources of efficiency data for heating systems e default values given in Table 4 of the SAP 2012 document e data from the Product Characteristics Data File PCDF section 24 2 this gives the most accurate values for specific appliances e user entered efficiencies this can be useful at the design stage when no appliance has been specified For gas and oil boilers user entered efficiencies may not be used in as built SAP calculations and EPCs the values must be replaced by PCDF figures For some systems for example gas fired warm air systems only the default SAP 2012 efficiencies may be used whilst for others for example gas condensing boilers any of the three sources is acceptable Note that heat pumps can be specified either using the PCDF or by accepting the default efficiencies microCHP systems can only be specified by means of the PCDF The Product Characteri
53. use the method in BS EN ISO 6946 1997 by unpicking the Mechanical fasteners box on the Other tab of the Options dialogue but there is little reason to do so CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 49 Correcting using fastener data If the point thermal transmittance of the fastener is not known the additional heat loss resulting from the fasteners can be calculated Figure 8 1 1 On the Edit menu click Construction type 2 In the Layer bridged by mechanical fasteners list select the layer which the fasteners penetrate 3 Enter the number of fasteners per square metre 4 Enter the Fastener lambda that is the thermal conductivity of the fastener Typically this will be 17 W mK for stainless steel and 50 W mK for mild steel 5 Enter the alpha coefficient which is 0 8 for the standard case of a non recessed fastener 6 Enter the cross sectional area of the fastener typical double triangle ties have a cross sectional area of 11 3 mm based on 3 8 mm diameter Alternatively you can select a standard fastener configuration from the Mechanical fas teners list If the fastener does not penetrate the whole insulation layer for example because a mushroom cap is being used enter the depth of insulationwithout a fastener as the Recess Saving fastener configurations If you frequently use a configuration of fasteners which is not in the Mechanical fasteners you can add a new configuration to the list or edit an
54. which may be at different orientations or pitches For blocks of flats the benefits from PV are applied as follows e where the PV is connected to an individual flat the output contributes to CO emis sions calculations and ratings calculations e where the PV is connected to all dwellings usually by the landlord supply the benefit is applied CO emissions calculations but not to ratings calculations The total PV rating the Peak kW value should be divided between the dwellings in proportion to their total floor areas For each installation 1 Enter the Peak kW of the system obtain this value from the manufacturer or sup plier 2 Select the Pitch of the panels 3 Select the Direction which the panels face 4 Select the amount of Overshading which is likely to be less than that of any win dows facing in the same direction 5 If the PV array is connected directly to the electricity supply of the dwelling tick Connected to electricity meter 28 2 Wind turbines The electricity generated by a wind turbine attached to a building or on a mast within its curtilage grounds can included in the SAP calculation However where a turbine supplies electricity to more than one dwelling or is connected to a development by private wire the electricity can not be included in the SAP calculation see Appendix M3 of the SAP 2012 document for further details To specify a wind turbine 1 Enter the Number of turbines 2
55. 12 solar panels In SAP 212 the usage of solar hot water is now modified by the configuration of showers in the dwelling The best performance comes with non electric showers only while electric showers only will be worst SAP 2012 also revised the calcu lation of output from solar hot water panels and has introduced the second order heat loss coefficient az which improves the accuracy of results for panels with less insulation 24 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 24 1 Dimensions Ventilation Walls roots amp floors I Openings Wi aber heating Primary heating secondary heating Overheating amp Cooling Pit i Alt Tech MW Dwelling has two main heating systems Main heating system 1 Fraction 1 00 Main heating system 2 Main heating system V Both systems heat whole house System 2 uses System 1 s pump i Group Central heating systems with radiators or underfloor heating 1 Sub group Gas boilers including LPG 1998 or later System Condensing combi with automatic ignition 104 Fuel Gas mains Electricity tariff Default Heating contro
56. 12 5 o lnside surface resistance Figure 6 1 The new layer will be inserted above the selected layer You can add layers to the calculation by inserting materials from the program s extensive database which includes data for generic materials and cavities as well as branded products from a number of manufacturers For many common constructions it is possible to insert all the layers from the database If you cannot find a material in the database then you can insert a blank layer and edit the information yourself The program always adds a new layer directly above the currently selected layer so in the new layer would be inserted above the polyethylene and below the plywood sheathing 31 CHAPTER 6 WORKING WITH LAYERS 32 When you start a calculation you should select the lowest layer which will be the inside surface resistance for walls and roofs and the outside surface resistance for floors before beginning to add layers Because layers are of this it is quicker to work from outside to inside for wall and roof calculations and from inside to outside for floor calculations 6 1 Inserting layers from the Products database Products Database 5 LS Categories Products Renotherm Asbestos cement sheeting amp substitutes BS5250 Rockwool Chipboard a Decking Plywood n Fibreboard BS5250 Brickwork Foamed glass BSS 50 Cavities Hardboard 6855250 Composite boards i i Concrete n ai PWC rigid sheet Waferboar
57. 52 Room heater systems This group includes room heaters such as gas or solid fuel fires In most cases the only data required is that from the primary heating drop boxes However where the declared efficiency of the heater is known tick the box Use manufacturer s declared efficiency then complete the Make Model and Declared efficiency boxes and select the BS Test Method used to obtain the efficiency Other space and water heater systems Electric ceiling heating is currently the only system in this category The only data re quired is that from the primary heating drop boxes Community heating scheme Community heating schemes use central heat generators to heat water which is then cir culated through pipes to supply space heating and hot water to more than one dwelling The heat may be provided by a number of different systems and community heating schemes may often include Combined Heat and Power CHP systems which will pro vide heat and generate electricity Appendix C of the SAP 2009 document contains further information on the treatment of community heating schemes in SAP Group Community Heating Scheme an Electricity tariff Default Heating controls Charging system linked to use of community heating programmer and at least two room ther Select Load weather compensator Select Community heating Heat distribution system Calculated 1 08 Heat Source Boilers Fuel Heat from boilers
58. 600 mm centres Brid Stee studs 1 2 mm 400 mm centres 3 i Timber framed wall prefabricated panels default fraction BR 443 4 5 1 a Timber framed wall prefabricated panels lower fraction BR 443 4 5 1 Mortar joints 440 x 215 mm blocks internal leaf BR 443 4 2 Site formed timber framed wall default fraction BR 443 4 5 Site formed timber framed wall lower fraction BR 445 4 571 Figure 7 5 Using one of the default thermal bridging conditions To use a default thermal bridge 1 Set the Bridge type to 7 dimensional 2 From the Thermal bridge Type list select one of the default bridging conditions 4tbdefault 3 The program sets e The bridge material e The thermal conductivity of the bridge e The fractional area of the bridge referred to in JPA Designer as the Proportion bridged The default conditions are listed in Table 7 1 To set the bridging material and proportion directly Material Timber Angle o Proportion bridged 0 16 nja Specify proportion Figure 7 6 Setting the bridging proportion directly 1 Select the bridging Material which sets the thermal conductivity of the bridge 2 Tick the box Specify proportion Figure 7 6 CHAPTER 7 WORKING WITH MATERIALS Table 7 1 Default bridging fractions Construction Material Conductivity Fraction Mortar joints 440 x 215 mm blocks external Mortar 0 94 0 067 leaf BR 443 4 2 Mortar joints 440 x 215 mm blocks inter
59. E a7 Edit Database Categories Products Flooring Black Sheathing Fet 3 00mm Insulation loose Cement Partical Board 20 00mm Fibre Board 13mm 13 00mm Lath and render 19mm 19 00mm Membranes Onduline Sheet 3mm 3 00mm Metal Lined VB P C Rigid 5 00mm Metals and glass Perlite 15mm 15 00mm sand Binding screed 50 00mm sheet 3mm Insulation slab Miscellaneous Render and plaster Roofing Single Ply Membrane Soil Sand and Gravel stone Timber Woodfibre 2 0 023 EcoTherm UK LTD p pg Edit category Clone category Edit product Clone product search database T Delete category E New category Ti Delete product E New product F cose Figure 13 1 The Edit Database dialogue 2 Click the Clone category button The Clone category dialogue opens 3 Enter a name for the new category and click OK 4 A new category will be created containing copies of the original materials To delete a user defined category 1 Select the category to delete 2 Click the Delete category button An Information dialogue asks you to confirm the deletion 3 Click Yes to delete the category No to keep it To insert a new material in a user defined category 1 Select the category in which you want to create the new material 2 Click the New product button The Edit material dialogue opens 3 Complete the Edit material dialogue chapter 7 4 C
60. G Technologies D New Edit T Delete Additional allowable electricity generation for box C6 kgert year 0 000 Hydro electric generation kw h year 0 00 Micro wind turbines on the building or within its curtilage _ 3 O E wwHAS Lookup Humber of turbines WMH Dedicated storage volume I Rotor diameter m 0 000 ooo Terrain type jj FGHRS Lookup Height of turbine hub above ridge 9 900 FGHRS FAY Module at rar Peak kM Pitch Direction Overshading aoo Heavy gt 80 sky blocked Figure 28 1 The Photovoltaics and Alternative Technologies tab SAP 20012 takes account of the contribution of certain renewable sources of energy and some heat recovery technologies including photovoltaic panels section 28 1 wind turbines linked to one dwelling section 28 2 hydro electric generators section 28 3 waste water heat recovery units WWHRS section 28 4 flue gas heat recovery systems FGHRS section 28 5 158 CHAPTER 28 RENEWABLES AND SPECIAL FEATURES 159 The data for all those systems is entered in the Photovoltaics and Alternative Technologies tab abbreviated to PV amp Alt Tech Figure 28 1 That tab is also used for entering the amount of any additional energy generated by other means ection 28 6 28 1 Photovoltaic panels Photovoltaic panels PV generate electricity from sunlight JPA Designer enables you to include three different sets of panel
61. ING WITH MATERIALS 41 J Well Vented Cavity 150 6946 2007 Slightly Vented Cavity ISO 6946 2007 Y Slightly vented cavity opening area mm2jm 77 Cavity details Figure 7 3 Entering data for a slightly vented cavity Slightly vented cavities A slightly vented cavity has openings which are more than those of an unvented cavity but less than those of a well vented cavity 500 1500mm m As it is not possible to calculate the cavity resistance directly JPA Designer calculates the resistance of the construction with an unvented cavity and also with a well vented cavity then calculates a average resistance weighted according to the area of openings the procedure is described in ISO 6946 2007 section 5 3 3 Slightly vented cavities require the following information e Type select Slightly vented cavity e Description type a description of the layer this will appear on the report e Slightly vented cavity opening area mm m this is the area of openings in each linear metre of the cavity see Figure 7 3 e Cavity details if the cavity has one or more low emissivity surfaces or the width is less than ten times the thickness use the Cavity details button to open the Airspace Resistance Calculator see section 7 3 Vented cavities A vented cavity is a special cavity type used in condensation risk analysis When a cavity is defined as a vented cavity the vapour resistances of all layers to the outside of the cav
62. In order to carry out this calculation the number of dwellings above and below a flat or maisonette must be entered in the Non domestic premises in the same building are treated as one dwelling When the calculation region has been set to Scotland the Dimensionstab includes two addition boxes for the Number of dwellings above and Number of dwellings below boxes Figure 19 2 JPA Designer will check the values entered into the two boxes against the definition of the flat or maisonette in the Project Information dialogue It will warn you if the values are incompatible e g a top floor flat with one or more flats above or a mid floor flat with no flats above 20 Ventilation SAP determines the heat loss produced from air movement between the inside and out side of a dwelling by considering e air infiltration through the building fabric e details of the ventilation arrangements Data for air movement is entered using the Ventilation tab Figure 20 1 Dimensions Ventilation Walls roofs te floors Openings Water heating Primary heating secondary heating Overheating amp Cooling PY amp Alt Tech Source of q50 value Pressurigation Test Result Pressure Test Assumed Calculated not suitable for Building Design g50 re nf h 10 00 as built as designed Regulations compliance v This dwelling has been pressure tested Ventilation main secondary other heating heating Chimneys 0 0 5 0 S Open
63. Ltd Alpha FlowSmart FS 50 2008 a 60012 2010 Apr 06 12 06 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 2008 cl 50011 2010 Apr 06 12 04 20029 Alpha Heating Innovation Ltd Alpha FlowSmart FS 25 2008 aT q Cancel Figure 28 3 The flue gas heat recovery systems FGHRS database 28 5 Flue gas heat recovery systems Flue gas heat recovery systems FGHRS recover heat from the combustion products of condensing boilers to pre heat the domestic hot water supply To specify FGHRS 1 Tick FGHRS and click the Lookup button The FGHRS database dialogue opens ure 28 3 1 Select the Manufacturer 2 Select the type from the Available list 3 Click OK Where the FGHRS has a photovoltaic array feeding directly into a close coupled store the PeakkW Pitch Direction and Overshading of the PV array should be set in the FGHRS PV Module section 28 6 Other allowable generation There are some sources of electricity which cannot be included in the calculations for Building Regulations compliance but can be included for other calculations particularly those to demonstrate zero carbon homes status Code for Sustainable Homes level 6 and for the Northern Ireland low and zero carbon homes scheme Electricity from such sources should be entered in the box Additional allowable elec tricity generation for box ZC6 ZC6 is the box number on the zero carbon homes calculation see section 16 of the SAP 2009 document Electricity gener
64. NG 143 Solar panel details Solar collector type Direction Overshading oe M of ee net nF 0 00 Evacuated tube collector South Heavy 280 sky blocked eto loss collector efficiency Te 0 60 i D eet aia Significant gt 60 80 sky blocked Collector heat loss coeffficient ai 3 00 Unglazed Eastwest 2nd order collector heat loss coet gde 0 01 Pitch NE SMA al aa I Dedede sarda lines 0 00 Horizontal 60 degrees Morth None or wer little lt 20 sky blocked 30 degrees C Vertical o 4 Separate solar cylinder Declared values 45 degrees F Solar powered pump Showers Nonelectric showers only Figure 23 9 Data entry for solar panel water heating e The net Aperture area of solar collector in square metres e The Zero loss efficiency of the collector no e The heat loss coefficient of the collector a e The second order collector heat loss coefficient av e The volume of the dedicated solar storage See figure H2 of the SAP documentation for definitions e Whether there is a separate solar cylinder e The solar collector type using the radio buttons e The pitch of the panels measured from the horizontal and their orientation e The amount of overshading on the panels generally this will be less than the over shading of windows facing the same direction e Whether there is a solar powered pump This will reduce the amount of electricity used for pumping water e The configuration of Showers amp New in SAP 20
65. NO aN CONTENTS Il U value calculation The JPA Designer U value module 4 1 U value project information Construction detail iS 3 Light steel frame construction type 6 Working with layer 6 1 Inserting layers from the Products database 6 2 Inserting blank layers in a calculation 6 3 Managing layer Working with material 7 1 Basic characteristic 7 2 Types of material 7 4 Thermal bridging Correction factors and adjustment 8 1 Mechanical fastener 8 2 Air gap correction Advanced calculation 9 Twin skin metal cladding and roofing 10 Ground floor U value 10 1 Ground floor details 202 2 2 Basement U value 11 1 Basement floor 11 2 Basement wall 11 12 Creating report 12 1 Adding notes to report 12 2 Customising report 13 Editing the Products database 13 1 Short code 1 Element typa aoaaa a a a a a a 2 Internal and external surfaces 7 3 Typesofcavity 0 4 3 Rainwater cooling A Rainscreen cladding 5 Elements separating heated and unheated space 9 1 Light steel framed structure 25 26 26 28 28 30 30 31 32 33 34 35 36 36 39 43 47 47 50 51 52 53 55 55 56 58 59 60 63 64 69 69 70 72 74 75 76 79 CONTENTS Ill Condensation risk 14 The problem of interstitial condensation Cond
66. S ROOFS AND FLOORS 120 New Element aS Element Wat alls Curtain wall Construction Heat capacity kJ nfk Enter areas INcluding doors windows rooflights Area including glazing re U value Ww trFF Effective thermal resistance 0 7 Help Link to this U value calculation al Utes 28 dges AU Perimeter m Cost Err Description ons Figure 21 2 ElementDialogue You should therefore define the internal ceiling elements before you enter the internal floors e Heat capacity enter the heat capacity value for the element if you have se lected a Construction its default heat capacity will already be entered e Area Enter the area of the element If you have chosen to use gross areas the text above the Area box will read Enter areas INcluding doors windows rooflights If it reads EXcluding doors windows rooflights you must enter net areas e U value Enter the U value in the text box If you have already carried out the U value calculation in the same JPA Designer project you can select it using the Link to this U value calculation drop down that creates a permanent link between the element in the SAP calculation and the U value calculation the software will update the SAP calculation if the U value changes CHAPTER 21 WALLS ROOFS AND FLOORS 121 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 ef
67. SO 13370 As the calculations for a basement s walls and floor are linked with each calculation requiring data about the other element it is beset to calculate the basement floor U value first 11 1 Basement floors Basement floor dimensions Basement Details for 50 13370 FPA 0 00000 Calculate it him O225 w m 0 300 lambda 1 500 Default Figure 11 1 Entering data for basement floors To complete a basement 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 me tres e The thermal conductivity of the ground lambda A in W mK see Table 11 1 and annex G of BS EN ISO 13370 To calculate a basement floor U value 1 Create a new U value calculation in the Project Manager window and open it for editing 2 In the U value Construction dialogue set the Element Type to Basement Floor enter an Element description then click OK 3 In the Ground Floor Details dialogue Figure 11 1 enter e the Perimeter Area ratio P A or check the box labelled calculate it and enter the Perimeter and Area separately 69 CHAPTER 11 BASEMENT U VALUES 70 e the wall thickness w e the basement depth h and e the thermal conductivity of the ground 4 Enter the layers which make up the floor construction Include layers to represent e Screed e
68. Sections To Print dialogue for condensation risk reports The main differences are 1 Before starting to print or create a PDF tick the Condensation risk box on the status bar at the bottom of the main U value window 2 In the Sections To Print dialogue review whether you want to print the summer time condensation results and the ISO moisture table and tick the appropriate boxes 17 Using the BS 5250 1989 calculation method The BS 5250 1989 Appendix D method is based on the same underlying principles as the method set out in ISO 13788 but analyses condensation risk for a 60 period rather than the whole year and reports results in a different way The Appendix D method is no longer referred to by building regulations and standards but is still available within JPA Designer To use the BS 5250 1998 calculation method open the Environmental conditions dia logue and untick Use 2003 condensation method The dialogue box will now show the environmental data for the BS 5250 1989 method 17 1 External conditions The program sets standard values for external environmental conditions following BS 6229 1982 and BS 5250 1989 which are e summer temperature 18 C winter temperature 5 C e summer relative humidity 65 winter relative humidity 95 If you need to calculate condensation risk for other external environments you can change the standard values by typing new values into the text boxes To return to the default value
69. Sections in blue are imported from VE Sections in red need to be checked The section in green contains the Copy buttons Left back C O Right back i Top roof Unspecified To enter the additional data on openings 1 In the Openings tab double click on one of the listed openings The Doors Win dows and Rooflights dialogue opens Figure 34 2 2 The following items will already be completed Opening type Opening within Glazing U value Area Opening orientation There is no need to change the val ues CHAPTER 34 COMPLETING THE CALCULATION 179 Set the Double glazing air gap and the Frame type Check the g window value which is usually defined automatically from the Glaz ing If you have specific values for the project set the Source of U value to BFRC data and enter a g window value The Overshading which is the extent to which the sky is obscured by trees and neighbouring buildings may be left at Average or unknown you need only adjust this if the degree of overshading is greater You should never reduce the overshading to Very little for a new dwelling there is no way of telling this will be the case throughout the life of the dwelling The Blinds curtains and external shutters settings affect the amount solar flux reaching the inside of the dwelling Adjusting the settings can reduce the risk of solar gain However unless initial analysis indicates there is a significant risk of overheating
70. Specify the Rotor diameter in metres 3 Select the type of terrain which surrounds the dwelling 4 Enter the height of the hub of the turbine above the ridge of the roof in metres As part of the process of producing the improvement recommendations for an EPC JPA Designer must calculate the notional benefit gained from installing a wind turbine You must therefore specify the Terrain type even if there is no wind turbine on the dwelling CHAPTER 28 RENEWABLES AND SPECIAL FEATURES 160 28 3 Hydro electricity The electricity from hydro electric units can be included in the SAP calculation pro vided the total amount generated has been calculated and signed off by an appropriately qualified engineer The amount of electricity is entered in Hydro electric generation kWh year Where electricity is supplied to several dwellings it should be assigned in proportion to their floor areas See Appendix M4 of the SAP 2012 document for further details 28 4 Waste water heat recovery systems WWHR Database en E Manufacturer Database date 18 12 2014 Database revision 372 Table 353 453 Available Ref Manufacturer id Manufacturer Brand Model Qualifier ist Year Made Final Year Made Effidency Utilisation m Total rooms with shower and or bath Instantaneous System 1 Number of mixer showers in rooms with a bath l Number of mixer showers in rooms without a bath Instantaneous System 2 Number of mixer showers in roo
71. Summer Temperature Dewpoint Outside Rso 0 04 Internal External Inside 69 6 RH ae 0 RH Rsi 0 10 25 C 20 C 15 C 10 C AC C 5 C Figure 16 2 Dewpoint graph for a roof with condensation predicted at the interface between layers 4 and 5 16 3 The Results table The Results Table shows the headline results for each interface in the construction To view the Results table on the View menu click Results Table 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 g m The result n a means no condensation is predicted at that interface You can see more detailed results in the ISO Condensation table CHAPTER 16 VIEWING RESULTS 91 16 4 Producing reports The results of condensation risk analysis can be printed or produced as PDF files in the same way as the results of thermal calculations chapter 12 Sections To Print Sechons to print Summer time condensation resulta ISO moisture table Thermal mass T apered insulation Figure 16 3 The
72. THE JPA DESIGNER SAP 2012 MODULE 100 Project Information amp Options Client name amp address Project address Pd Briel Me bir A T Builder Ochre The Old ard Suedeshire Tawnywille 1 9 Suedeshire Post Code BN1245D 3 get UPRN PostCode BN1230R UFRN clear UFRN Fhone Far E m ll Add to clients Edit clients list Reference certificate Date 4 4 August 201 5 Plot drawing Pot 15 6 Building type Detached house U County England or Wales T EPL Language English T B Location Morth East England 9 Look up 10 Project type New dwelling as built i UL Related part Wo related party yi2 disclosure LE 2 14 le Treat low E glass coating as soft To Enter gross opaque element areas Inherit Pi OF M Cancel 15 Boller comes under the exception procedure allowed in Part L Figure 18 4 The Project Information dialogue CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 101 e EPC language Figure 18 4 item 8 sets the language in which the EPC is produced EPCs in England Scotland and Northern Ireland must be produced in English EPCs in Wales may be issued in in English or Welsh Location Figure 18 4 item 9 this is used to in the overheating assessment and in SAP calculations for dwellings with space cooling To set the Location enter the Post code Figure 18 4 item 3 then click Look up Figure 18 4 item 10 The program then sets the region There is a map of
73. VE model for SAP The VE model is defined in the normal way in ModellT with the geometry and construc tions A model may include one or more dwellings and may also include non domestic spaces for mixed use schemes Once the model has been constructed there are two additional settings required for the conversion procedure e assigning rooms to dwellings using the UK dwellings room groups e identifying the dwelling living area 32 1 Defining dwellings with room groups r ApacheSim compliance w E Part Le i2013 england Part L2 2010 England Wales Part F 2012 N Ireland Section 6 2010 Scotland t Part LI SAP 9 80 England Wales Part L2 2013 England UK Dwellings a a Figure 32 1 Setting the regulations to UK Dwellings for export Room Groups Figure 32 2 Adding room groups Prior to export the rooms in each dwelling have to be assigned to the appropriate dwelling in the UK Dwellings room grouping scheme To define dwellings 1 Save the project and switch to the VE Compliance UK amp Ireland module 2 On the toolbar set the Regs list to UK Dwellings see Figure 32 1 VE now adds a new room group scheme UK Dwellings 171 CHAPTER 32 PREPARING A VE MODEL FOR SAP 172 aa Model 4 a1 COA o a we ROOM Hg ROOM Figure 32 3 The assign button for assigning rooms to a room group 3 Click the Edit Room Groups button 4 In the Edit Room Groups dialogue cr
74. Where an accredited construction detailis used you can use the w value which has been calculated for that detail Table K 1 in the SAP 2012 document lists values for accredited construction details 2 Where a w value has been calculated for a specific construction detail by suitably qualified person you can use that psi value That might be a detail supplied by a manufacturer of a construction product featured in the detail 3 The default w value from the final column of table K 1 in the SAP 2012 document The defaults are worst case values which represent constructions where little atten tion has been paid to continuity of insulation or airtightness To calculate Htb requires the length and value of each junction in the dwelling The junction length should be obtained by measurement from the design drawings It is ac ceptable to sum the length of separate junctions of the same type for example adding together the lengths of all the window jambs The data for the Htb calculation is entered using the Calculate HTB dialogue Figure 21 3 which lists all the junction types assigned to the dwelling showing for each one This is heat loss additional to that which happens through the elements Accredited construction details for England and Wales are available on the Planning Portal http www planningportal gov uk Those for Scotland from the Scottish Government web site http Awww scotland gov uk Topics Built Environment CHAPTER
75. al 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 none horizontal or vertical then enter the details of any insulation if you have selected none leave the rest of this section blank e Insulation name e Insulation thickness board thickness in mm e Insulation conductivity the lambda value in W mK e Insulation width or depth depending upon whether the insulation is laid horizon tally 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 For suspended floors edge insulation refers only to insulation applied at the base of the subfloor void insulation around the edge of the deck should not be included as edge insulation gt Horizontal edge insulation was commonly used to reduce thermal bridging and cold spots on larger floors which did not require a complete layer of thermal insulation However the lower U values now required by Building Regulations usually require a full layer of insulation making the use of horizontal edge insulation unlikely 11 Basement U values JPA Designer calculates U values for basement walls and floors using the methods in in BS EN I
76. alue Construction dialogue Figure 5 1 which accepts details of e The type of element e g roof wall floor together with additional information for some elements Section 5 1 e The conditions at the internal and external surfaces see Section 5 2 e Details of any light steel frame construction see kection 9 1 e Details of twin skin metal roofing or cladding see ection 9 2 e Corrections factors for mechanical fasteners see chapter 8 e Adjustments for the effects of unheated spaces see kection 8 5 To enter data 1 From the menu bar select Edit gt Construction type The U value Construction dia logue opens 2 Enter your data and click OK For some constructions such as those with mechanical fasteners you may find it easier to enter some of the data in the construction dialogue after you have entered the layers of the element 5 1 Element type JPA Designer recognises several types of element which have to be treated differently in the calculation process Use the radio buttons in the Element type section to select the type of floor wall or roof Some elements have options for entering additional informa tion The available element types are e Flat roof A roof with a pitch typically less than 10 There is an option to enter data for an inverted roof section 9 3 28 CHAPTER 5 CONSTRUCTION DETAILS 29 U value Construction EJ ement Detals Unhested Spaces Element Type External Surface
77. and Area When calculating basement WALL U valuies add any basement FLOOR insulation in to the box on the right Insulation PA name ti Insulation thickness mm od Insulation conductivity mE 0 000 Description Figure 11 2 Entering data for a basement wall calculation 1 Create a new U value calculation in the Project Manager window and open it for editing 2 In the U value Construction dialogue set the Element Type to Basement Wall enter an Element description then click OK The Ground Floor Details dialogue opens Figure 11 2 3 Enter the Perimeter Area ratio P A 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 6 Add the layers of the construction in the main U value window 12 Creating reports You can print calculation reports 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 report includes e Project information e Details of the construction e The U value a
78. and has the additional Variable layer pane which accepts a number of different layers item 2 Each of those layers shows the results of the U value calculation as if that layer replaced the place holder layer in the main calculation item 3 To use a variable layer 1 In the main U value window click the layer below the position for the variable layer 2 On the Insert menu click Variable layer The program inserts a variable layer in the calculation and displays the Variable layer pane see Figure 9 4 3 Select the blank layer in the Variable layer pane and add layers from the database or by add and edit blank layers 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 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 Once you have identified a configuration which gives the result you require you can convert the variable layer calculation into a standard U value calculation 1 Click the layer in the variable layer pane which you want to use in the standard calculation 2 On the Edit menu click Move selected variable layer into construction 3 The variable layer is deleted and the selected layer is inserted as a standard layer CHAPTER 9 ADVANCED CALCULATIONS 60 Tapered Areas 28 scrinton Tapered Insulati Minimum tapered
79. apered layer should be divided into eight blocks with two a and e being rectangles sloping from the centre line to the perimeter and the remainder being triangles in each case sloping from the highest corner at the centre line to the lowest side at the perimeter b c d f g and h To enter a tapered layer in an existing U value calculation 1 Divide the roof into blocks and calculate the minimum thickness block areas and taper thicknesses 2 On the Insert menu click Tapered layer 3 Enter the data for the minimum thickness and the conductivity of the insulation 4 Enter the data for each block in turn making sure each block goes into the appro priate table You can use the Total area figure at the bottom right of the dialogue to check you have entered all the sections of the roof CHAPTER 9 ADVANCED CALCULATIONS 62 3 0m 6 0m 3 0m lt M H 8m 12m m Figure 9 6 A typical roof with tapered insulation 10 Ground floor U values The standard method of calculating U values has to be modified for ground floors and basements to take account of the thermal resistance of the ground using the method is set out in ISO 133702 This section describes the general procedure for calculating the ground floor U value whilst the following sections describe the individual parts of the calculation To calculate a ground floor U value 1 Create a new U value calculation in the Project Manager window and open it for editi
80. apour Condensation occurs when the temperature at a point with in the construction drops below dew point and the air cannot support all the water vapour resulting in some of the excess being deposited as liquid water The Dew point graph is a visualisation of the relationship between the predicted temper ature through an element and the dew point The orientation of the Dew point graph is determined by the building element walls are shown with layers running vertically and roofs with layers running horizontally The graph shows two lines e the temperature gradient through the construction calculated for each interface shown in red and e the dew point at each interface shown in blue The lines are plotted for the month with the worst condensation conditions Where the two lines do not touch the actual temperature is above dew point and no condensation is predicted at those interfaces Condensation is predicted at any interface where the two lines touch see Figure 16 2 Note that the actual temperature will never be lower than the dewpoint and the lines will never cross To open the Dewpoint graph e on the View menu select Dewpoint graph or e click the Dewpoint graph button on the tool bar To view the results for the month with the greatest evaporation click the Summer button in the Results to show section CHAPTER 16 VIEWING RESULTS 90 Dewpoint Graph od 7 SS Sa Drg Always on top io Winter
81. ar 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 on that category The Products box shows the material in that category 4 Click on a material to select it then click Add to construction alternatively you can double click on the material in the Products box The Thickness dialogue opens If the material has a set thickness the layer will be added without the Thickness dialogue opening 5 Enter the thickness of the layer then click OK The Construction box now shows the new layer 6 You can now add more layers from the database using the Construction box to control the position of the new layers 7 When you have finished adding layers click Close The main U value window now shows the calculation with the new layers added M Product database hints Product categories are sorted with branded materials first followed by generic and user categories sorted in alphabetical order If you are not sure which category a particular material belongs to you can click Search to find it You can use the Only show My database box to make the software only show categories which you have added 6 2 Inserting blank layers in a calculation To insert a new blank layer 1 Select the existing layer which will be below the new layer 2 From the menu bar select Insert gt Blank layer alternatively you can press lt Insert gt The ne
82. arting the export process IES Import Options SAP Version Consolidation options 9 90 2009 C Do not consolidate any elements Consolidate elements within rooms e aa Consolidate elements within dwelling EE Figure 33 2 The IES Import Options dialogue To export a dwelling or set of dwellings 1 In VE in the UK Dwellings Analysis tab click Compare Dwelling and Target Emis sion rates Figure 33 1 2 At the IES Import Options dialogue Figure 33 2 a Select the version of SAP which you want to be used to create the SAP calcu lation b Select the consolidation method c Click OK CHAPTER 33 EXPORTING FROM VE 175 3 The import is completed You may see a warning about the boiler database being out of date You can ignore the warning at this stage There are instructions for updating the boiler database at 4 JPA Designer displays the Description dialogue see Figure 3 5 Either accept the suggested name for the calculation which is derived from the VE file name or type your own and click OK see for more details about adding calculations to projects 5 A SAP calculation is created for each dwelling and is listed in the JPA Designer Project Manager window 34 Completing the calculation Because of the differences in data structure between VE and SAP the export process does not transfer all the information required for a SAP calculation the additional data has to be entered to comple
83. asured at the thickest point e The value of alpha 1 6 is the default setting for these constructions 17 Select the Layer bridged by brackets 9 3 Inverted roofs In inverted roofs often known as protected membrane roofs some or all of the thermal insulation is applied above the waterproof membrane and restrained by aggregate or other ballast Rainwater falling on the roof can percolate to the waterproofing membrane and increase the rate of heat loss To allow for that a rainwater cooling correction factor dUr has to be applied to inverted roof calculations the rainwater cooling factor is described in section 8 3 As the correction factor requires you to select the layers affected by rainwater cooling it is best to add the correction factor after you have defined the layers in the construction Element Type Flatroot ext insulation layers fx 9 040 p 3 000 F Inverted Paving slab ballast r XPS 70 mm HPS 120 mm VWistercnroanf membrana r Pitch roof horizontal ceiling Floor other than ground floor Figure 9 3 Inputting data for rainwater correction To enter an inverted root 1 From the file menu select Edit gt Construction type The U value Construction dia logue opens 2 In Element type select Flat roof Insert an Element description then click OK 3 Add the layers of the construction chapter 6 4 Open the U value construction dialogue again and in Element Type tick the In verted box The d
84. ated by wind turbines linked to a development by private wire may be entered here See Figure G1 in the SAP 2012 document for illustrations of these systems CHAPTER 28 RENEWABLES AND SPECIAL FEATURES 163 28 7 Special features SAP 2012 includes a procedure for including new technologies in calculations in the intervals between revisions of the SAP The Appendix Q procedure which is named after the appendix of the SAP document in which it is described may only be used for prod ucts which have been independently assessed and are listed on the Appendix Q web site at http Awww ncm pcdb org uk sap page jsp id 18 The web site has a calculation spreadsheet for the various product types and in some cases data sheets for individual products To incorporate a technology using the Appendix Q procedure 1 Carry out the SAP calculation as normal 2 Complete the the appropriate Appendix Q spreadsheet this may require informa tion on the product taken from a datasheet and may involve changes to the SAP calculation The Appendix Q spreadsheet will contain instructions specific to the calculation 3 Transfer the results from the spreadsheet to the Special features section of the Pho tovoltaics and Alternative Technologies tab Figure 28 1 entering 4 a brief Description of the technology 5 the Energy saved figure using the drop down to select the Type of fuel saved 6 the Energy used figure using the drop down to select the Type
85. be twice the rail thickness Leave the emisivity values at 0 9 Enter the air gap correction dU for both insulation layers section 8 2 use the value 0 01 Click OK From the menu bar select Edit gt Construction Type In the U value Construction dialogue tick Built up metal roof wall In the Built up metal roof wall cladding section enter the Rail spacing and Rail width Figure 9 2 Use the drop down to select the Layer bridged by rail 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 CHAPTER 9 ADVANCED CALCULATIONS 58 15 Enter the Sheet profile width Sheet profile depth and Sheet profile centres in mm In the drop box select the layer of insulation which is not bridged by the rails If the liner profile is deeper than 25 mm ignore the check box and change the thickness of the insulation layer by subtracting the profile depth from the original thickness e g for a 30 mm profile with 130 mm actual depth of insulation use a value of 100 mm 16 Enter the details for the brackets in the Correction for mechanical fasteners section Enter e The thermal conductivity of the brackets usually 50 00 W mK for mild steel e The number of brackets per square metre calculated by dividing the total number of brackets by the total element area e The cross sectional area of the brackets me
86. beside the thermal resistance see square 1 in Figure 7 4 2 Click the button The Airspace Resistance Calculator is displayed Figure 7 4 3 Set e Air space thickness d in mm This is measured in the direction of heat flow e Airspace width b in mm This is the width measured at right angles to the heat flow For a wide cavity such as that in a cavity wall enter a value at least ten times greater than the thickness CHAPTER 7 WORKING WITH MATERIALS 43 Thickness mm Thermal Thermal Vapour Vapour p conductivity resistance resistivity resistance W mK m w MNs gm MNs g 0 0 nja ooo Ile nia 0 000 Density kg m 0 0 _ Airspace Resistance Calculator Airspace thickness in direction of 35 Heat Flow Direction heatflow d mm Horizontal Airspace width b mm 500 gt Upwards Black bedy radiative coefficient hro 5 100 D Downwards Emissivity of previous surface E1 0 900 Emissivity of next surface E2 0 900 Unvented Airspace resistance 2 m K W Figure 7 4 The Airspace Resistance Calculator 1 shows the button on the Edit material dialogue 2 shows the calculated resistance e Black body radiative coefficient hr0 in W m K Take the value from the table on the right for the mean temperature For the UK a mean temperature of 10 C is usually appropriate e The emissivities of the two surfaces of the cavity Most materials have an emis sivity around 0 90 but foil facings to insulation and metal
87. biomass Heat fraction 0 8000 Efficiency 89 0000 SOMICES Source Boilers Fuel Heat from boilers mains gas Heat fraction 0 2000 Efficiency 93 00003 N Edt T Delete Figure 24 5 Data entry for a community heating scheme with two heat sources To specify a community heating scheme in JPA Designer e set Group to Community heating scheme JPA Designer displays the Community heating section of the Primary heating tab Figure 24 5 e set the heat sources e set the heating controls e set the heat distribution system To set the heat sources 3Some of the options will not be appropriate for new build but are included for compatibility with the Reduced data SAP RdSAP used for EPCs for existing dwellings CHAPTER 24 PRIMARY HEATING 153 Community Heating Heat source es Heat source CHP Fuel Heat from boilers biomass Spedal fuel name Spedal fuel emission factor Special fuel primary factor Heat fraction Effidency CHP heat to power ratio Figure 24 6 Setting a heat source for community heating e Click the New button the Heat source dialogue opens Figure 24 6 e Select the type of heat source from the Heat source drop down e Select the Fuel from the drop down When specifying a fuel which is not listed use the Special fuel name emission factor and primary energy factor to enter its details e Set the proportion of the total heat load provided by that source enter a fraction between 0 an
88. ce for the specific configuration of the material this will usually be supplied by the manufacturer of the product The same principle applies to the vapour resistance A composite material requires the following information e Type select Composite e Description type a description of the layer this will appear on the report e Thickness enter in millimetres mm 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 Fixed vapour resistance materials Some materials such as glass and metals have vapour resistances which are effectively infinite even if they are used in very thin layers The fixed vapour resistance material type allows the thermal performance of these materials to behave in the same way as normal materials changing according to the thickness but allows their vapour resistances to be set as very high fixed values typically 100 000 MNs g As materials with fixed vapour resistances behave the same way as normal materials in thermal calculations you need only use the type in condensation risk calculations A fixed vapour resistance material requires the following information CHAPTER 7 WORKING WITH MATERIALS 38 o Type select Fixed vapour resistance e Description type a description of the layer this will appear on the report e Thickness enter in millimetres mm e Thermal conductivity enter in W mK
89. ck the Remove button You can print the results of multiple dwelling calculations and produce PDFs by following the procedures in Section 29 2 Part V Importing dwelling data from IES Virtual Environment 169 31 Overview of VE import The IES Virtual Environment software VE can be used to demonstrate Part L compliance for non domestic buildings according to Approved Document L2A but does not directly address compliance for dwellings Instead VE processes the data for dwellings into a format which the JPA Designer SAP module can import JPA Designer then creates a SAP calculation for each of the dwellings which can then be used to demonstrate compliance with Part L There are three stages to the import process 1 Creating the model in VE While this for most part follows the standard methods for modelling in VE there are several additional points which are explained in chapter 32 2 Sending the data from VE to JPA Designer see chapter 33 3 Finalising calculations in JPA Designer and checking compliance This step is re quired because the data formats for building services differ between VE and the SAP methodology describes the additional data required in JPA Designer The import process is particularly useful for apartment blocks including schemes where part of a block falls under Approved Document L2A and part under L1A Note that the procedure does not make any changes to the VE model 170 32 Preparing a
90. ck way of building a set of U value templates see ection 3 8 3 12 Converting between SAP versions JPA Designer can convert SAP calculations carried out under one version of SAP to a later version of SAP You may need to do this when the Building Regulations compliance calculation is based on a previous version of SAP but the EPC has to be issued using the current version of SAP The program takes a copy of the data from the original calculation and converts the copy to the required version leaving the original calculation untouched You can convert e SAP 2009 V9 90 to SAP 2012 V9 92 e SAP 2005 V9 81 to SAP 2009 V9 90 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 22 e SAP 2001 V9 70 to SAP 2005 V9 80 9 81 e SAP 2009 V9 90 to SAP 2005 V9 81 Once you have carried out the conversion you should check the new calculation Where building services information has been taken from the boiler database SAP 2001 and SAP 2005 or the Product Characteristics Data File SAP 2009 and SAP 2012 you should re select the systems in the converted calculation To convert a SAP 2009 V9 90 calculation to SAP 2012 V9 92 1 In the Project Manager window select the SAP 2009 calculation 2 From the menu bar select Edit gt Copy selected SAP V9 90 2009 dwelling to a V9 92 2012 dwelling 3 JPA Designer creates a copy of the original calculation as a SAP 2012 calculation The copy has the same name as the original but append
91. d Insulation loose 3 Woodwool slabs A Thickness Insulation slab Membranes Enter the product thickness in mm Only show My database Sort on short 12 5 ok Cancel Short Code Next Search Add to constuction E Edit database Construction Outside surface resistance Brick outer leaf BRE Cavity gt 25mm wall CIBS Polisocyanurate BS5250 Blockwork medium Exposed 1400kq nF 440 x 215mm Plaster Dabs Cavi Plasterboard AS5250 Inside surface resistance Figure 6 2 The Products Database window The Products database contains a wide range of materials and cavities for use in U value calculations and is accessed using the Products Database window Figure 6 2 The window has three main parts e The Categories box which is used to select the type of material you want to use Categories of branded materials are shown in bold categories of generic materials in normal text and user categories in italics see Chapter 13 for information on adding your own materials e The Products box which you use to select a material from a particular category CHAPTER 6 WORKING WITH LAYERS 33 e The Construction box which shows the order of layers in the construction To insert layers using the Products Database 1 In the layers list select the existing layer which will be below the new layer see Figure 6 1 2 On the Insert menu click Layer from database or click the Database button on the toolb
92. d 1 in the Heat fraction box The total heat fraction from all the heat sources must total 1 00 e Enter the percentage Efficiency of the heat source Note the efficiency should be entered as a percentage e For a CHP system enter the heat to power ratio which will typically be in a range of 1 25 1 5 e Click OK to close the dialogue e Repeat the procedure for multiple heat sources use the Edit and Delete buttons to adjust or remove heat sources To set the controls e Set the Heating controls and the Electricity tartff Systems which rely on flat rate charging will usually be less efficient than those where charging is linked to use The heat distribution setting is used to determine the distribution losses for the system You can either e Use a default value based on the type of pipes used to circulate hot water select the pipe configuration from the Heat distribution system list e Use a calculated distribution loss factor which is specific to the project there is guidance on calculating such a loss factor in Appendix C of the SAP 2012 docu ment select calculated from the Heat distribution system list then enter the loss factor in the neighbouring box CHAPTER 24 PRIMARY HEATING 154 Electric underfloor heating This option reqpresents underfloor heating systems based on electric cables in the floor slab or integrated into flooring The only data required is that from the primary heating drop boxes 24 4 Ad
93. d surfaces If you have chosen to use gross areas for opaque elements there is no need to subtract the areas of openings from wall or roof areas When adding internal walls the areas of both sides of the wall should be measured U value the rate of heat transfer through the element U values should be calcu lated to BR 443 Conventions for U value calculations The JPA Designer U value module may be used for this The requirements for U values for different elements are summarised in Table 21 2 Note that for party walls between dwellings the U values must be taken from Table 21 1 K Values kappa values this is the heat capacity of the element which expresses the amount of energy required to raise its temperature Table 1e of the SAP docu ment contains additional information about K values 117 CHAPTER 21 WALLS ROOFS AND FLOORS 118 Dimensions ventilation Walls roots amp floors Openings Wi ater heating Primary heating Secondary heating Overheating amp Cooling F Thermal Bridging O Enter Htb value manually Hib 0 0000 Calculate it Enter y value manually V Imported SAP 9 8179 90 for EPC issue only 0 0s00 Calc Ref Not accredited construction details TMP T hermal mass User defined Thermal Mass Parameter 0 00 Total heat capacity 24174 00 Element type U value Factored UA kappa walue A s E fis a a trey lr RIA Pitched roots in
94. dialogue Figure 7 1 The dialogue enables you to set e the basic characteristics of the material ection 7 1 e the type of material ection 7 2 e details of thermal bridging section 7 4 e any air gap correction ection 8 2 Edit Material Material Description Product X Code Category Thickness mm Thermal Thermal Vapour Vapour conductivity resistance resistivity resistance W mK mAN MNs gm MNs q 100 0 025 4 000 10 000 1 000 Density kg m 0 0 2 directional heat flow product Resistance decrease per K above 23 C Specific heat capacity J kg K 0 0 Thermal resistance In 9 000 0 000 D D 43 Thermal resistance Out 9 999 Requisite ID 0 Normal 0 Membrane D Well Vented Cavity ISO 6946 2007 None 7 Help Composite Clear Cavity Slightly Vented Cavity 150 6946 2007 l l Fixed Vapour Resistance Bridged Cavity oes Is thermal insulation Vented Cavity 2 dimensional Thermal bridge Bridge description Timber Angle o Proportion bridged 0 12500 Bridge width mm 50 Xi Non bridge width mm 350 x2 Non bridge height mm n a Bridge thermal conductivity W mK 0 13 Bridge thermal resistance m K W 0 76923 Bridge thickness Z Follows material thickness 100mm E Fixed at 3 0 mm Second bridge Air gap correction deltau 0 00 Wim Help Figure 7 1 The Edit Material dialogue To edit the properties of a layer 35 CHAPTER 7 WORKING WITH MATERIALS 36 1 Click on
95. dit gt Copy selected SAP V9 90 2009 dwelling to a V9 81 2005 dwelling 3 JPA Designer creates a copy of the original calculation as a SAP 2005 V9 81 calcu lation The copy has the same name as the original but appended with SAP version 9 817 4 Open and check the calculation particularly the services section Finally it is also possible to import SAP 1998 9 60 calculations from JPA SAP v2 and convert them to SAP 9 70 1 From the menu bar select Import JPA SAP file into this Project 2 In the Open dialogue select the JPA SAP file you wish to import 3 JPA Designer creates a copy of the original calculation as a SAP 2001 V9 70 cal culation 3 13 Renaming calculations To change the name of a calculation 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Rename selected item The Name dialogue opens 3 Enter a new name for the calculation and click OK The Project Manager window shows the new name When naming a calculation avoid using the Windows restricted characters lt gt otherwise you will have problems creating PDFs of calculation reports see hapter 12 for a more detailed explanation 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 calculatio
96. ditional data There are two items of additional data which the software collects for producing the EPC which appear on the Primary heating tab e Separated conservatory with fixed heater Tick this box if the dwelling has a ther mally separated conservatory see SAP guidance section 3 3 3 for the definition of thermally separated which has a fixed heater within it e Dwelling in smoke control area This box is only relevant if solid fuel is set as the fuel for the primary or secondary heating If the dwelling is within a smoke control zone the use of house coal and dual fuel is not permitted and wood is permitted for an exempted appliance only For further information on smoke control areas see http smokecontrol defra gov uk index php Tick the box if the dwelling is within a smoke control area There does not appear to be a central source on smoke control areas the only means of finding out is to contact the local authority 25 Secondary heating A secondary heating system is an additional space heating system for the dwelling com mon examples are gas fires or wood burning stoves Where a secondary system is pro vided it should be included in the calculation guidance on when to include a system is given in Approved Document L1A paragraph 2 14 The fraction of space heating pro vided by the secondary system is defined in table 11 of the SAP 20012 document Data on secondary heating is specified using the Secondary heating tab F
97. do not contain those charac ters otherwise PDF creation will fail The restricted characters are lt gt You can change the printer settings by selecting File gt Printer setup from the menu bar It is also possible to produce PDF reports of all the U value calculations at once In the Project Manager window on the File menu click Print all U value calculations in this project to PDFs The program will then offer the Sections to Print dialogue before creating the PDFs 12 1 Adding notes to reports U value Construction Element Details Unheated Spaces Print Report Notes Any notes which you wish to add to a calculation report can be entered here They appear on the report between the layer list and the final result Figure 12 3 The Print Report Notes tab in the U value Construction dialogue You can add notes to the report of a calculation which can be used to explain particular features of the calculation or to highlight assumptions made within it To add notes open the U value construction dialogue and click on the Print Report Notes tab You can then enter your wording Figure 12 3 The notes text will appear between the layers list and the final result CHAPTER 12 CREATING REPORTS 75 12 2 Customising reports You can control many aspects of the appearance of JPA Designer s calculation reports e Selecting the printer In the U value module select Fil
98. dulating User defined Energy Efficiency Ratio EER 0 00 Figure 27 1 Settings for air conditioning systems The energy used for space cooling must be included in the SAP 2009 calculation when ever space cooling is present The data for the system is entered in the Overheating amp cooling tab Figure 27 1 The Cooled fraction the proportion of the dwelling which is served by the cooling system This can be determined by dividing the floor area of the cooled part by the total floor area The efficiency of the system can either be set to default values by setting e System type The system can be Split or multi split or Packaged e Compressor control This can be set to On off or Modulating e Energy label class Select A to G with ND for no data Where the Energy Efficiency Rating EER is known tick the User defined Energy Effi ciency Ratio and enter the value in the EER box 157 28 Renewables and special features Photovoltaics Peak kv Pitch Direction Overshading 1 0 00 ha Modest 20 60 sky blacked z Connected to electricity meter 2 0 00 ha hl Heavy p80 sky blocked iM Connected to electricity meter 3 0 00 al al Heavy 280 sky blocked h iM Connected to electricity meter Special features new energy saving technologies Appendis 0 Description of new technology Energy saved kihvear 0 00 Type of fuel sawed Energy used kMhyear 0 00 Type of fuel used Other Appendis
99. e For every other storey the height is measured from the ceiling of the floor below to its own ceiling 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 For each storey enter the floor area in m and the average room height in m against the appropriate row in the list 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 Note that e Values must be entered against the appropriate storey This is particularly important for flats do not use ground floor unless it actually is a ground floor flat Assigning floor area to the wrong floor will not affect the results of the SAP calculation but incompatibilities between storey and party floor values will prevent lodgement of the EPC Enter data for storeys on the fourth floor and higher on the final line e Where a floor has a different occupancy beneath it such as another flat maisonette or retail unit tick the party box on that row e For party storeys on the fourth floor or higher enter the floor number in Party floor storey The storey number is the floor number plus one for example the second floor has a storey number of three e The two lines for Ground floors allow for dwellings which have a double height lounge e The Exposed floor line may be used for
100. e Compliance zone or on the View menu click Compliance checklist You can use the tabs at the bottom of the Compliance Checklist to view all the calculation worksheets and reports JPA Designer checks 1 The TFEE and TER status for England and TER status for Wales 2 Backstop values for fabric and services including e maximum permissible fabric U values e maximum permissible air leakage rates e design limits for fixed building services 3 Summer overheating 164 CHAPTER 29 COMPLIANCE AND REPORTS 165 Sections To Print a Sections to print Printer options Ei SAF Worksheet C Summer Overheating ee SAF Worksheet improved dwelling Summary Certificate Sa Ww TER Worksheet Printer margins DER Worksheet on BEE areias Energy Performance Certificate Printer Fort Standard Case TER FEE Heat Demand EPC Costs Predicted Energy Assessment Assessment of Zero Carbon Home Input Data C Code for Sustainable Homes Regulations Checklist C Htb values x Cancel Figure 29 1 The Sections To Print dialogue for SAP 2012 29 2 Outputting SAP results You can print the results of SAP calculations or produce a PDF file which is ideal for emailing The results can include e SAP worksheet the worksheet for the SAP calculation e SAP worksheet for improved dwelling the SAP calculation with EPC recommen dations implemented e TER worksheet the worksheet for the TER calcula
101. e If the problem persists email details of the problem to support techlit co uk Please include details of your computer system and attach sample files or PDF outputs where possible We will respond as soon as we can If you have difficulty using the program for example you are uncertain how to enter a layer in a condensation risk calculation please follow these steps CHAPTER 1 INTRODUCING JPA DESIGNER 4 e Consult the program manual or on line help system e Check the forum and FAQ on our web site http forum techlit co uk to see if the query is addressed there If you are new to condensation risk calculations we offer distance learning and on line training training courses which provide a thorough introduction to the software and its use You can find more details at http www techlit co uk training 2 Getting started This section of the manual describes how to install JPA Designer on your PC and explains how the user registration and on line licence checking systems work It also includes instructions on adding your company details and logo to reports 2 1 System requirements JPA Designer runs on Windows XP Vista 7 and 8 see Technical Note 2012 04 Apple Macintosh users can run JPA Designer on a Windows virtual machine under Parallels Desktop or VMWare Fusion or on a Windows installation using Boot Camp we do not offer technical support for installing JPA Designer on such systems Whatever computer you are us
102. e gt Printer setup You can select the printer and paper source It is possible to set the page orientation to landscape rather than portrait but the reports are not designed for landscape format e Changing the font used in reports In the U value module select File gt Font Then in the Font dialogue set the typeface style and size The default is Arial regular 10 pt Larger sizes may cause problems on the page with columns overflowing Note also that some fonts are wider than others even at the same point size so it worth testing font settings e Page margins These are set in the General tab of the Options menu There are two Top settings one for the first page and one for the second page This is to allow you to print calculations onto headed paper with printing on the first sheet starting lower down the page e Adding your logo and address You can add your logo and contact details to cal culation reports see section 2 8 e Adding a disclaimer to be shown at the bottom of calculation reports Enter the disclaimer text in the U value disclaimer box on the Options dialogue General tab e Including the total construction thickness in the calculation report In the Other tab of the Options dialogue tick Print total thickness on U value report The total thickness will then appear on calculation reports below the layer list 13 Editing the Products database To make U value calculations easier all JPA Designer U value modules inc
103. e 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 user data folder on Windows 7 usually c ProgramData JPATL JPA Designer 981 You can specify a different default folder by specifying the startup folder using the Options dialogue Startup folder Documented FA SottwaresSaP queness SAP queres 2013 1 User data folder C ProgramD atas FANPA Designer Open folder Check for programme updates 2 Use Progy Server Proxy server Proxy Username Proxy pot p Proxy password x Cancel Figure 3 4 Startup folder controls in the Options dialogue To specify the startup folder 1 From the menu bar select Options 2 On the General tab click the Select button for the Startup folder item 1 in ure 3 4 3 In the Browse For Folder dialogue select a folder and click OK 4 The folder will now be the default location for saving JPA Designer files and PDF files of calculation reports We recommend you have a regular back up schedule for your data 3 6 Opening projects To open an existing project 1 From the menu bar select File gt Open project The Open dialogue opens 2 Select the file you want to wor
104. e included in calculations correctly Please contact JPA TL Ltd for information and current pricing CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 19 for wall calculations and one for floor calculations alternatively you might divide them into masonry or timber framed calculations The simplest way to create a template file is to use the Import U value feature to collect all the existing U value calculations you want available into one project then save the project as a template file To import an existing U value calculation to a project 1 Start a new project in JPA Designer on the File menu click New 2 On the File menu click Import U value from another JPA Designer project 3 In the Open window select the file which contains the calculation 4 At the Import U value from Project dialogue Figure 3 7 select the U value calcu lation from the list and click OK U1 The U value calculation is added to the open project 6 Repeat the process to import all calculations you want into the project Import U value from Project Select a U value to import Example 1 Cavity wall Example 2 pitched roof with horizontal ceiling Example 3 timber framed wall Example 4 external wall insulation Figure 3 7 The Import U value dialogue You can of course create new calculations for the template if you want to The name which appears in the Categories list is taken from the project name in the Project Manager windo
105. e whether e the CPSU as a separate timer for the heating store e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e there is a separate timer for the domestic hot water If the dwelling has solar panels complete the Solar panel details section of the Water heating tab Section 23 10 CHAPTER 23 WATER HEATING 140 23 8 MicroCHP or heat pump Use this option for systems in which the hot water is provided either by a domestic sized combined heat and power microCHP system or by a heat pump with efficiency data from the Product Characteristics Database Gection 242 If the heat pump has been entered using the default efficiency figures in SAP and not the Product Characteristics Database then you should select Hot water storage tank as the source of domestic hot water For a microCHP system the only options are whether there is e a summer time immersion heater for hot water e a hot water vessel within the microCHP system e a separate timer for domestic hot water For heat pump the standard method is to accept the database values in which case it is only necessary to specify whether there is e a summer time immersion heater for hot water e a hot water vessel within the microCHP system e a separate timer for domestic hot water However it is possible to override the values by ticking Override heat pum
106. eate a room group for each of the dwellings in the model in the UK Dwellings scheme Click the plus button to add room group and assign it a name Figure 32 2 5 Select the rooms which comprise the first dwelling 6 Click the Assign button Figure 32 3 7 In the Assign Room Group dialogue make sure the Room Grouping Scheme is set to UK Dwellings then select the group dwelling Click OK 8 Repeat the previous three steps to assign rooms to other dwellings Once you have assigned all the rooms you intend to export which may well only be a fraction of the rooms in the model you can review the assignments by setting the Room group list to UK Dwellings 32 2 Identifying the dwelling living area Heated space Unheated space with pitched roof and insulation between rafters Unheated space with pitched roof and insulation between joists Room n the oof as material alteration Glazing cavity Buffer space unheated or with low level lt 25W m2 of heating UK Dwellings Anahysis LAUSE iia i Unheated separated dwelling conservatory Room settings Dwelling conservatory lt 30m Scotland P Internal void or warm roof Room type Heatedapace Figure 32 4 Defining the living area For SAP calculations one part of the dwelling is defined as the living area see tion 19 2 which is heated to a slightly higher temperature than the rest of the dwelling Before export you must identify the room or rooms w
107. ective each low emissivity surface must face a cavity at least 25 mm wide Although the U value calculation methods implemented in JPA Designer cannot directly assess the effect of reducing radiation heat loss it is possible to account for the effect of such materials by adjusting the thermal resistance of a cavity which has a low emissivity material to one or more faces The thermal resistance value for a low emissivity cavity must be obtained by a valid test method which considers only the effect of the material upon the overall conduction heat losses through an element Values should have third party certification such as in BBA Agr ment certificates If you are not supplied with certified values use the default value for a low emissivity cavity of 0 44 m K W for walls 0 34 m K W for roofs and 0 50 m K W for floors see BR 443 paragraph 4 8 2 If you know the emissivity of the facing mate rial you can also use the Airspace Resistance Calculator ection 7 3 to calculate the resistance Calculating cavity resistances The default resistances for cavities are not valid for cavities with one or more low emissiv ity surfaces or those with a width which is less than ten times the thickness You should therefore use the Airspace Resistance Calculator to calculate the correct resistance To calculate an airspace resistance 1 Set the Type of layer to Clear Cavity or Bridged Cavity The Airspace Resistance Calculator button appears
108. ed with SAP version 9 92 4 Open and check the calculation particularly the services section To convert a SAP 2005 V9 81 9 80 calculation to SAP 2009 V9 90 1 In the Project Manager window select the SAP 2005 calculation 2 From the menu bar select Edit gt Copy selected SAP V9 8x 2005 dwelling to a V9 90 2009 dwelling 3 JPA Designer creates a copy of the original calculation as a SAP 2009 calculation The copy has the same name as the original but appended with SAP version 9 90 4 Open and check the calculation particularly the services section To convert a SAP 2001 V9 70 calculation to SAP 2005 V9 80 1 In the Project Manager window select the SAP 2001 calculation 2 From the menu bar select Edit gt Copy selected SAP V9 70 2001 dwelling to SAP 9 80 2005 dwelling 3 JPA Designer creates a copy of the original calculation as a SAP 9 80 calculation The copy has the same name as the original but appended with SAP version 9 80 The 9 80 calculation can then updated to 9 81 by ticking the SAP version 9 81 box in the Project Information dialogue in the SAP module see 1 When you open the 9 80 calculation you will be prompted to add additional details which were not required by the earlier version of SAP To convert a SAP 2009 V9 90 calculation to SAP 2005 V9 81 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 23 1 In the Project Manager window select the SAP 2009 calculation 2 From the menu bar select E
109. edicted 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 on the View menu select ISO Condensation Tabler 150 Condensation Table E 5A Click on an interface to view the build up figures Aluminium Rockwool Cladding Roll Rockwool Cladding Fall Bitustick Bitustick Rockwool Cladding Fall 1743 4 2005 52 3735 18 4424 80 4746 52 4604 46 4040 51 326r FF edfd 22 2214 83 Print forrn FL Close Figure 16 1 ISO 13788 Condensation table The upper part of the window Figure 16 1 shows the interfaces within the construction When you select an interface by clicking on it the lower half of the table shows the 88 CHAPTER 16 VIEWING RESULTS 89 amount of condensation predicted at that interface It shows the amount of condensate deposited or evaporated each month gc and the accumulated condensate at the end of each month Ma both measured in g m A negative amount of condensate indicates the amount of moisture predicted to evaporate in that month The results always start with the first month in which condensation is predicted if no con densation is predicted in any month results start with January Guidance on interpreting results is given in ISO 13788 and BS 5250 16 2 The Dewpoint graph In condensation risk analysis the dew point is the temperature at which air would be saturated with v
110. elling 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 18 2 Click on the compliance zone to open the Compliance Checklist which lists the status of the dwelling against each of the criteria defined in Approved Document L1A This 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 Changes to the building services can be carried out within JPA Designer Changes to the building geometry should be made in VE and then re importing the dwelling into JPA Designer On exporting the dwelling a second time JPA Designer will give you an option to either re import the data into the selected dwelling or create a new dwelling 182 3 7 Reporting 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 183
111. elow for a more detailed description CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE JPA Designer psf Home Documents Writelines JPA File Edit View Help 2 E Project Manager tLe ee ae F B T i P 3O O O O ee Conservation of Fuel amp Power in Dwellings SAP 9 92 4 Detached house basic SAFP 2012 Version 9 92 5 DFEE TFEE TER DER s558 538 17 76 20 69 Achieved U value armik Opaque elements worst area weighted Pitched roots insulated between joists B 01270120 Pitched roots insulated between rafters Pitched roots with integrated insulation Flat roofs Sloping walls skilling cambcells O 00 0120 Wi alls 0278 0280 Party Walls Floors Ground floors 0217 0210 Windows doors amp rooflights Average U value 1 80 7 1 635 pf floor area 13 642 20 7 ar Overheating risk 8 Not significant 10 Total carbon dioside emissions 3144 9 kgevear SAF 6 83 62 55 El value 80 32 Average HLF 1 32 Figure 18 1 The main SAP window 1 Menu bar 2 Toolbar 3 Status indicators 4 SAP version 5 Calculation name 6 Fabric Energy Efficiency results 7 Dwelling emissions results 8 Fabric U values 9 Overheating assessment 10 SAP rating 11 Compliance status CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 98 The SAP version in this case SAP 9 92 SAP 2012 The calculation name as ente
112. ensation risk analysis in JPA Designe 15 1 Defining the construction 15 2 Environmental condition Viewing result 16 1 ISO Condensation Table 16 2 The Dewpoint graph 16 3 The Results table 16 4 Producing report 16 Using the BS 5250 1989 calculation method 17 1 External condition 17 2 Internal conditions 02 2 17 3 BS 5250 1989 result 17 4 Calculation option IV SAP 2012 The JPA Designer SAP 2012 module 18 1 Overview of the SAP 20012 module te ee ee Dwelling dimensions 19 1 Dwelling area and volume 19 3 Low energy lighting ee 0 2 0 2 Ventilation opening 0 3 Sheltered side 0 4 Ventilation type Walls roofs and floor 1 1 Defining building element 1 2 Linear thermal bridging 1 3 Thermal mas 22 Opening 0 1 Airinfiltration oaa ee 30 81 82 82 83 88 88 89 90 91 92 92 92 93 93 94 95 95 95 96 96 99 104 105 106 106 106 107 108 109 111 111 111 117 117 122 126 127 CONTENTS 23 Water heating 3 6 Boiler with thermal store 3 7 Combined primary storage unit CPSU 3 8 MicroCHP or heat pump 3 9 Community heating scheme providing domestic hot water only 3 10 Solar panel Primary heating 24 4 2 Efficiency data for heating system 4 3 The main primary heating system 4 4 Additional data 5 Secondary heating
113. ent name Figure 3 3 If you need to edit the details held for clients click Edit clients list then make the changes in the Edit Clients dialogue Client name amp address Hawkemoore Contracts Mr A T Builder 0 Gibbons Esq T aire Figure 3 3 The client name and address list 3 4 Setting the calculation region JPA Designer is designed to carry out the thermal calculations required in different regions of the world Some regions require U value calculations while others require R value calculations some regions only consider one way heat flow while others require two directional heat flow see Table 3 11 The region settings also determine the climate data available for condensation risk analysis Table 3 1 Regional calculation settings Region Calculation type Heat flow Asia U value Heat out Australia R value Heat in heat out lreland U value Heat out Middle East U value Heat in heat out New Zealand R value Heat in heat out UK U value Heat out The calculation region can be set in the Project Address dialogue see Figure 3 2 1 Select the Region in the list 2 Click Set as default 3 All new calculations will use that region You can override the region setting for individual calculations in the Project Information amp Options dialogue CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 16 3 5 Saving projects JPA Designer project are saved in the same way as any other file 1 From the menu bar select Fil
114. ers within building elements have different combinations of thermal and hygrothermal properties which have to be address in U value and condensation risk calculations JPA Designer use four types of solid material and three types of cavity see bection 7 3 In addition the program distinguishes between materials which are thermal insulation and those which are not The rest of this section describes those types of layer and cavity and the data required for each one CHAPTER 7 WORKING WITH MATERIALS 37 Normal Normal materials have the same composition all the way through so the thermal resis tance of a normal layer is calculated from the material s conductivity and thickness and the vapour resistance is calculated from the thickness and vapour resistivity A normal material requires the following information e Type select Normal e Description type a description of the layer this will appear on the report e Thickness enter in millimetres mm e Thermal conductivity enter in W mK e The program calculates the Thermal resistance in m K W e Vapour resistivity only required if you will be carrying out condensation risk anal ysis enter in MNs gm e The program calculates the Vapour resistance in MNs g 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 thermal resistan
115. evises the calculation taking account of any changes you have made to the data and closes the dialogue CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 103 e Cancel Closes the dialogue but ignores any changes you have made to the calcu lation e Apply Revises the calculation taking account of any changes you have made to the data but leaves the dialogue open With a monitor set to 1024 by 800 pixels or higher it is possible to see the main SAP window and the SAP 9 92 2012 Worksheet Values 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 e Next Takes you to the next tab 19 Dwelling dimensions The Dimensions tab Figure 19 1 is used to enter data on the e living area of the dwelling e low energy lighting e dwelling orientation area and volume of the dwelling position of a flat or maisonette in a block Scotland only Dimensions Ventilation Walls roots amp floors Openings Water heating Primary heating Secondary heating f Overheating bs Cooling PY amp Alt Tech Area Ay Shorey Volurnie rf height m r Basement floor 0 00 o oo 0 00 Ground floor C party o oo o oo 0 00 Ground floor 2 0 00 o oo 0 00 Exposed floor 0 00 ooo 0 00 First floor paty pop o oo
116. existing one New Mechanical Fastener Corre 28 Enter a description HJ 25 at 6 per metre Figure 8 3 Naming a new mechanical fasteners configuration To create a new configuration 1 In the U value construction dialogue click New 2 In the New Mechanical Fastener Correction dialogue enter a description of the con figuration Figure 8 3 This is the description which will appear in the Mechanical fasteners list CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 50 Correction for mechanical fasteners Description HJ 25 at 6 per metre Fasteners per off Recess mm i Alpha 0 8 m square metre Fastener lambda Fasteners cross mim 2 sectional area Use point thermal transmittance Ca ae Figure 8 4 Defining a new default configuration for mechanical fasteners 3 In the Correction for mechanical fasteners dialogue Figure 8 4 enter e Fasteners per square metre e Any recess figure e Fastener lambda the thermal conductivity of the fastener e The Fastener cross sectional area e Alpha should be 0 8 except for cold or hybrid light steel framed constructions when it should be 1 6 4 If you are using a point thermal transmittance tick the box then enter the transmit tance and number of fasteners per square metre You can also edit an existing configuration 1 In the U value construction dialogue select an item in the Mechanical fasteners list 2 Click Edit 3 In the Correction for mechanical fastene
117. f the SAP document for details of the different ventilation systems 2 Specify the details of the system For all ventilation systems leave the box 100 draught stripping ticked The additional performance data for systems that require it can be set in three different ways e Use the Default performance values built into the SAP specification Although this is a valid option for calculation the defaults values will give signifi cantly poorer results than the other options Although the gas fires themselves are flueless regulations require specific ventilation provision for each appliance which will result in heat loss through air exchange CHAPTER 20 VENTILATION 112 Approved installation scheme Source of mechanical ventilation parameters Default User defined Enter details Database Lookup MEY or WHA ts part of exhaust air heat pump Duct from database Arow Developments Lid YFS 7563 Figure 20 2 Setting the source of mechanical ventilation data e User defined allows you to enter your own performance values such as those supplied by product manufacturers e Database performance values from the Product Characteristics Data File PCDF maintained by BRE The PCDF values should be used wherever possible as they will be most accurate Default performance values To use default values select Default at Source of mechanical ventilation parameters This will give a poor result for the dwelling as
118. f 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 overhanging balconies or brise soleil will reduce the amount of sunlight falling on an opening in summer and so reduce the solar gain Where there is 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 reduce the amount of solar gain and the risk of overheating in summer Use the drop down to select the type of shading and then set the Fraction of daylight hours closed Appendix P of the SAP documentation gives some guidance of reasonable assump tions for these occupant determined values Overshading The extent to which the sky is obscured by trees and neighbouring buildings will determine the amount of sunlight and solar flux passing through the glazing Set the degree of overshading using the radio buttons Select Average or unknown if you cannot establish the amount of overshading The SAP guidance disallows the use of the Very little overshading category for new dwellings as it does not take account of conditions likely to apply over the who
119. fect of an enclosed but unheated space to its exterior The commonest unheated spaces are integral garages in houses and access corridors to apartment blocks some parts of room in the roof constructions are also treated as unheated spaces Click Select Ru to open the Effective Thermal Resistance dialogue then pick the garage configuration in the dialogue Further values for are given in section 3 3 of the SAP documentation e Description An optional text description of the element can be entered in the Description text box A description makes it easier to distinguish between several elements of the same type when editing a calculation e Perimeter and Cost Ignore these boxes Managing building elements To add a new element 1 Click the New button the New Element dialogue opens 2 Enter the data for the element then click OK JPA Designer shows the summary data new element in the element list To edit an element 1 Click the element to edit then click the Edit button The Edit Element dialogue opens 2 Make the changes to the element then click OK To duplicate an element 1 Select the element to duplicate by clicking on it once 2 Click the Duplicate button A copy of the element is created 3 Select the new element and click Edit to make changes To delete an element 1 Select the element to delete by clicking on it once 2 Click the Delete button A confirm dialogue appears 3 Click Yes to delete the element o
120. floors of apartments which are over garages parking bays or walkways CHAPTER 19 DWELLING DIMENSIONS 106 19 2 Living area The SAP 2012 calculation divides a dwelling into two parts e the living area which is the part of the dwelling presumed to be used most frequently and e the rest of the dwelling The living area is defined as the the room marked on the plan as the lounge or living room or the largest public room The area of other rooms which are not separated from the living room by doors should also be included However the living area cannot extend over more than one storey Enter the living area in m in Total floor area which is living area JPA Designer will calculate the living area fraction 19 3 Low energy lighting The proportion of low energy lighting is used in the calculation of electricity consumption for lighting with a higher proportion of low energy lighting resulting in lower electricity use and a lower DER The proportion of low energy lighting is also used to test compli ance with the minimum efficiency standards for fixed building services which currently require at least 3 out of 4 light fittings a fraction 0 75 to be low energy Enter e the total number of lighting units in Total fixed lighting outlets e the number of lighting units which count as low energy lighting in Low energy lighting units JPA Designer displays the Fraction of low energy lighting At the design stage when it i
121. flues l Fs 0 5 1 S el Flueless gas fires O S Sheltered sides 2 0 Ventilation Type Natural ventilation with intermittent extract fans Natural ventilation with passive stack ventilators Balanced whole house mechanical ventilation without heat recovery Balanced whole house mechanical ventilation with heat recovery Positive input ventilation from outside Positive input ventilation from loft Mechanical whole house extract ventilation Decentralized mechanical whole house extract ventilation Approved installation scheme Source of mechanical ventilation parameters Default User defined Enter details Z of windows amp doors draught stripped 100 0 Database Lookup Dantherm Air Handling 4 5 Dantherm Air Enter 100 for new dwellings which are to Handling 45 HCH 5 500292 comply with the Building Regulations MEY or MHA iz part of exhaust air heat pump Duct from database Lookup Figure 20 1 The Ventilation tab 108 CHAPTER 20 VENTILATION 109 20 1 Air infiltration Air infiltration represents unplanned air movement It is expressed as the volume of air which passes in one hour through a square metre of the surface of the building envelope m hm The value is is often referred to as the g50 value after the calculation result in BS EN 13829 There are three methods to enter the air infiltration data into the software e Using the results of pressure testing e On developments of one or two ho
122. he project file JPA Designer organises and saves calculations in project files which have the extension JDP You can save multiple calculations in the same file Calculations are created saved and managed in the JPA Designer Project Manager win dow Figure 2 1 which lists all the calculations in the current project 3 2 Starting a new project Whenever you start JPA Designer the program creates a new blank project which you can use straight away You can also create a new project at any time by selecting File gt New Project from the main menu or clicking the New Project button on the toolbar You can change the default project name A blank project to something more useful 1 Click once on the project name and select Edit gt Rename selected item The Project name dialogue opens Figure 3 1 2 Enter the new name for your project then click OK 3 The project is renamed The project name does not affect the calculations in any way 3 3 Adding project address details You can enter client address and site details for a project which you can then copy to all the individual calculations within that project You can enter and edit that informa tion using the Project Address dialogue Figure 32 You can also store client address information to reuse in other projects To add client and project details 13 CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 14 Project Name Enter a name for this Project Brownfield Mews F
123. ialogue shows three data boxes Figure 9 3 5 Enter the values for f x and p and in the box select the layers of insulation above the waterproof membrane Click OK CHAPTER 9 ADVANCED CALCULATIONS 59 9 4 Using variable layers The variable layer feature of JPA Designer helps you compare the performance of different materials in a construction or of different thicknesses of the same material Uvalue Element 1 Flat root Layer Thickness Thermal Thermal VWanour Vapour Pitch Bridge Link Conductivity Resistance Resistivity Resistance Details brg mm Mmk mkA MN s gm IMNs g 7 1 Outside surface resistance 0 040 2 Concrete medium weight B55250 150 0 0 590 0 254 150 00 22 50 3 Roofing felt laid in bitumen BS 5250 3 0 0 300 0 027 1000 00 A Variable layer j i j i 5 Blank layer double click to edit in UU OU WO OL 6 Inside surface resistance u 0 100 Variable layers 4 5 Wrap text Layer Thickness Thermal U value dU Bridge Conductivity Proportional Combined Details mrn Wmi Aes Method Metroa 1 Extruded polystyrene 655250 150 0 O02 0 167 0 16 0 000 j Rock fibre 855250 150 0 0 040 0 240 0 000 Polwisocyanurate BS 5250 150 0 0 030 0 184 0 000 j Polyurethane B55250 150 0 0 030 0 1 a4 0 000 Figure 9 4 U value calculation with a variable layer A calculation with a variable layer has a place holder layer in the main window item 1 in
124. ic ties Layer bridged by mechanical fasteners Recticel Eurothane GP Mechanical fasteners Wall with cavity fil SS double triangle ties 900 x 450 ors walls upto 15m with gt 90mm leaves Edit New No perm 2 5 Fastener 47 Wink Alpha og mit Cross 125 mm Recess mm Pie Help wad lambda ia Hh section Pte Use point thermal transmittance Figure 8 1 Data entry boxes for the mechanical fasteners correction There are two methods for calculating the effect of mechanical fasteners e using a point thermal transmittance value e calculating the correction based on the fastener dimension and materials Correcting using a point thermal transmittance The point thermal transmittance is a measure of the additional heat loss resulting from a fixing or bracket A value quoted for a particular fixing is valid only for that fixing Layer bridged by mechanical fasteners Mechanical fasteners Mo b per m 2 5 Point thermal Oo 003 Wi K transmittance V Use point thermal transmittance Figure 8 2 Entering details of the point thermal transmittance To use a point thermal transmittance 1 On the Edit menu click Construction type 2 Click Use point thermal transmittance Figure 8 2 3 Enter the Number of fasteners per m 4 Enter the Point thermal transmittance AIl versions of JPA Designer from 4 0461 build 025 onward use the method in BS EN ISO 6946 2007 It is possible to
125. igner This allows you to add new calculations to a blank project or to open an existing project There is an option not to display the screen when the program starts up To close JPA Designer e Select File gt Exit from the JPA Designer menu bar The program will prompt you to close any files which have not been saved 2 7 Uninstalling JPA Designer To uninstall JPA Designer 1 Open the Windows Add Remove programs control panel to access Control Panels select Settings gt Control Panels from the Start menu 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 Uninstalling the program will not remove any JPA Designer project files 2 8 Adding your company details to reports Most of the reports produced by JPA Designer can be customised to include your company name address and logo The details are added using Options dialogue from the main Project Manager window see kection 18 5 The logo must be a 256 colour BMP format fil It is also possible to set up details for several different companies within JPA Designer these sets of address details and logos are referred to as identities see kection 2 8 You can switch between identities to produce calculation reports with different addresses and logos Setting up address details To set up your company details and logo for reports 1 In the Project Manager window select Op
126. igure 25 1 Dimensions Yentilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating amp Cooling FY amp Alt Tech Subgroup Solidtuel y O System Closed room heater 633 7 Fuel ji Solid fuel room heater i HETAS approved Use manufacturer s declared efficiency Make Woro Model Badger Declared efficiency 62 BS Test Method BS EN 13229 Figure 25 1 The Secondary heating tab To specify secondary heating 1 Set the Group drop down to Room heater systems 2 Select the Sub group 3 Select the System 4 Select the secondary heating Fuel If the solid fuel room heater has been approved by HETAS tick the box The calculation will then use a higher default efficiency for the heater Where the actual efficiency for a solid fuel heater is known tick the Use manufacturer s declared efficiency box then enter the Make Model and Declared efficiency The BS Test Method used to obtain the efficiency value should also be entered 1 Heating Equipment Testing and Approval Scheme 155 26 Overheating Location in country Undefined Effective air change rate Enter value Building Window opening 0 0 ach m 7 Night ventilation Cross ventilation can be assumed only if the at least half of the storeys in the dwelling have windows on opposite sides and there is a route for the A ventilation air MHormally bungalows and two storey houses can be cross venti
127. igure 3 1 Changing the name of a project Project Address Client name amp address Project address Mr A T Builder The new House Mr A T Builder Windy Lane The Old ard Townton Towntor Blankshire Blankshire Post Code ABT Dy Post Code ABI ACD Phone 00119910 Fas S9edede4 Region ene 7 Emal bobtertbuilder com dd to clients Edit clients list Reference certificate Date 2 December 2 Figure 3 2 The Project Address dialogue 1 From the menu bar select Edit gt Project Address The Project Address dialogue opens 2 Enter the data by typing it into the appropriate boxes Use the lt Tab gt key to move between boxes Do not try to enter data in the top left hand box this box is used for retrieving details you have previously stored 3 If you want to store the client details to re use later click Add to clients 4 Click OK when you have entered all the data you need To copy the project address details to all the calculations in a project 1 Enter the address details in the Project Address dialogue 2 Click Pass down CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 15 3 Click Yes at the confirmation dialogue 4 Once the copying is done click OK You can also copy project address details to individual calculations once you have opened the calculations see section 4 1 To re use existing client data simply click on the list at the top of the Project information dialogue and select a cli
128. ing fabric chapter 21 Openings heat loss solar gain and daylighting information for windows doors and rooflights chapter 22 Water heating the source of domestic hot water its efficiency and fuel type in cluding details of any solar panels chapter 23 Primary heating the main heating system controls and fuel chapter 24 Secondary heating any additional heating system chapter 25 Overheating and cooling details for summer overheating and any fixed cooling systems chapter 26 and chapter 27 PV amp Alt Tech Photo voltaic panels wind turbines and new renewable technolo gies chapter 28 To open the dialogue at the start of a calculation click on the Dwelling dimensions button on the toolbar or on the Edit menu click Dwelling dimensions The tabs are listed at the top of the dialogue in the same order as they appear in the Edit menu Figure 18 5 To move between sections simply click on the tabs We recommend you work from left to right starting with Dwelling Dimensions and finishing with PV amp Alt Tech Dimensions Yentilation Walls roofs amp floors Openings Water heating Primary heating Secondary heating Overheating PY amp Alt Teach Figure 18 5 Tabs on the SAP 9 92 2012 Worksheet Values dialogue Uk Cancel Apply Help Mest 3 Figure 18 6 The buttons on the SAP Worksheet Values dialogue At the bottom of the dialogue are a series of buttons Figure 18 6 OK R
129. ing it will require an internet connection to check the validity of the licence to update the BRE Product Characteristics Database for the SAP 2012 module and to issue EPCs 2 2 Installation To install JPA Designer on your PC 1 Go to our web site at www techlit co uk and right click on the link labelled down load JPA Designer select Save link as or Save target as the exact wording will depend on which the browser you are using 2 Save the installer file jsetup990 exe to your PC we recommend downloading the file to the Desktop The download is about 13 MB 3 When the download is complete double click on the file Jsetup990 exe The In stallShield Wizard configures itself and after a few moments opens You may see a security warning that the publisher of the file could not be identified If you do click Run to continue the installation process 4 Click Next to continue with installation The installer displays the Licence Agree ment To continue with the installation click accept the terms of the licence agree ment then click Next CHAPTER 2 GETTING STARTED 6 5 At the Customer information screen enter your name and company name and using the radio buttons select whether you want JPA Designer to be available to all user accounts on the computer or just one We recommend you select all Click Next 6 At the Choose Destination Location screen we recommend you accept the default settings and install JPA Designer
130. into the folder c program files jpatl jpa designer 981 Click Next The installer will now copy the JPA Designer files onto your computer 7 When installation has finished the Setup Complete screen is displayed Tick the box labelled Launch the program and click Finish The installer will close and JPA Designer will open showing you the Project Manager window 2 3 User registration In order to use JPA Designer you must enter valid user registration details and the program must be able to check the status of your licence against our licensing database We supply the user name and key code when you buy a licence for a module If you do not enter your details JPA Designer runs in demonstration mode and will not display the results of calculations To enter license details for a module 1 At the Project Manager window Figure 2 1 select Edit gt User and Security Codes from the menu bar The User Registration dialogue opens section 2 3 2 In the section for the module e g the U value module enter the company name exactly as supplied in the registration email in the box Your company name The company name is case sensitive and should be entered exactly as shown in the email so if for example you enter Limited when the company name with the key code contained Ltd the program will not accept the key code 3 Copy the key code from the registration email and paste it into the bottom box on the User Registration dialogue 4
131. ion 3 8 Using U value calculation templates JPA Designer offers a range of standard U value calculations which you can use to speed up the calculation process and minimise repetitive work We refer these standard calcu lations as U value templates Each template contains the same information as a normal U value calculation including element definitions layers with bridging details and cor rection factors You can either use the template as is without modifying it or use it as a starting point to produce your own calculation but whichever route you chose the calculation process will be quicker There are three types of U value template CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 18 e standard templates for roofs walls and floors These are generic calculations which can be adapted by changing materials and thicknesses They are supplied with the program e manufacturers templates A number of construction product manufacturers have supplied U value templates for typical constructions featuring their products The templates are supplied with the program e user defined templates These are calculations which you have previously per formed and then saved as a template enabling you to build up a library of com monly used calculations See for instructions Inserting a U value calculation from a template The controls for inserting U value calculations based on templates are at the bottom of the Project Manager window
132. ion type a description of the layer this will appear on the report e Thickness enter in millimetres mm e Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 00 MNs g You will also need to enter the bridging details Section 7 4 If the width of the cavity is less than ten times its thickness you should use the Airspace Resistance Calculator to determine its thermal resistance see section 7 3 Well vented cavities A well vented cavity has large ventilation openings between the cavity and the outside air resulting in the conditions within the cavity being virtually the same as outside A cavity is considered well vented if it has ventilation openings greater than 1500 mm m BS EN ISO6946 typically the cavity behind rain screen cladding will be well vented When well vented cavity is included in a calculation 1 The thermal resistance of the cavity is set to zero 2 The thermal resistances of all layers to the outside of the cavity are also set to zero 3 The external surface resistance is set to match the internal surface resistance This allows for the inner face of the cavity which is effectively now the external face of the construction being sheltering from the wind l Well vented cavities require the following information e Type select Well vented cavity e Description type a description of the layer this will appear on the report CHAPTER 7 WORK
133. ironmental sets and indicates whether internal con ditions should be calculated on the basis of continental conditions 1 or maritime conditions any other value This item is used only when internal conditions are to be derived from the external conditions it is not used if fixed internal conditions are specified CHAPTER 15 CONDENSATION RISK ANALYSIS IN JPA DESIGNER 87 As an example 1 1 Newcastle Airport 3 4 92 4 2 89 0 0 This shows External data 1 User data 1 Location with no tilde Paired monthly values for temperature 3 4 and 4 2 and relative humidity 92 and 89 UK 0 Maritime climate 0 Once the environmental conditions have been entered and saved in Env_user txt and JPA Designer started the new data sets will show up in the Internal conditions list Note that the conditions will only show if their region matches the region selected for analysis If there are several users of JPA Designer within the same organisation the Env_user txt file can be set up on one PC then copied to the others ensuring everyone is using the same data sets 16 Viewing results You can view the results of condensation risk analysis in three formats e As month by month data in the ISO Condensation Table ection 16 1 e As a graph in the Dewpoint graph section 16 2 e In summary form in the Results table section 16 3 16 1 ISO Condensation Table The ISO Condensation Table shows the amount of condensate pr
134. is is determined by the external relative humidity and moisture load generated by the activities taking place within the building ISO 13788 defines five occupancy types with different humidity characteristics BS 5250 2011 suggests relative humidity ranges for those types see Table 15 1 The UK data is taken from Meteorological data 1961 1990 published by the World Meteorological Office while the data for the Republic of Ireland comes from the Met Eireann Map courtesy of Andrzej Niedzielski CHAPTER 15 CONDENSATION RISK ANALYSIS IN JPA DESIGNER 84 a Sea a Environmental Conditions S J Use 2003 Condensation Method Internal amp External Conditions Building locati UE Eskdalemuir View locati Google Maps Thanks to Andrzej Niedzielski Greenspan System salt elo Lea ee Sales Ireland Ltd Ballyhahill Co Limerick Ireland F Calculate internal conditions based on external conditions Use design data for internal conditions Climate Maritime Continental or tropical i Internal humidity class 4 Dwellings with high occupancy sport halls kitchens canteens buildings heated with unflued gas heaters Internal temperature C 20 0 Risk level Average Int T Int AH Ext T Ext AH Jan Be 2 1 8 26 5 Feb 20 0 67 3 1 8 23 5 Mar 20 0 BE 2 3 5 21 5 Apr 20 0 65 2 any 73 0 May 20 0 65 3 oF ff Jun 20 0 67 8 11 7 7o55 Jul 20 0 70 8 13 2 20 5 Aug 20 0 Ti f 12 9 22 5 Sep 20 0 70
135. isclaimer boxes 6 Click the Logo amp Signature tab 7 In the Logo position section enter the location of the Top and Left sides of the logo relative to the page and enter the Width of the logo All dimensions should be in millimetres t will probably take some experimentation to get the logo position and size correct 8 Enter the name of the Logo file including the bmp extension then click OK to close the dialogue 9 Copy or move the logo file to the folder containing the user data On Windows 7 this will be c ProgramData JPA JPA Designer Note The Certificate signature position and associated settings are no longer in use If you are a competent person under the TIMSA BBA U value competency scheme you can configure JPA Designer to add the scheme logo to your calculations 1 Click the Logo amp Signature tab 2 In the TIMSA logo position section enter the location of the Top and Left sides of the logo relative to the page and enter the Width of the logo All dimensions should be in millimetres It will probably take some experimentation to get the logo position and size correct 3 Enter the name of the Logo file including the bmp extension then click OK to close the dialogue CHAPTER 2 GETTING STARTED 12 4 Copy or move the logo file to the folder containing the user data On Windows 7 this will be c ProgramData JPA JPA Designer 5 If you want the TIMSA logo to be used by default tick Default to prin
136. ised membranes have much lower emissivities typically 0 03 0 05 e The heat flow direction 4 The program now displays the resistance for the airspace see square 2 in Figure 7 4 5 Click OK The calculated resistance is transferred to the Thermal resistance box of the Edit Material dialogue 7 4 Thermal bridging Thermal bridges are formed where the material in a layer is interrupted by a second ma terial with different thermal conductivity for example insulation in a timber framed wall being interrupted bridged by the timber studs In most cases thermal bridging increases heat loss through the bridged layer The effect of thermal bridges which occur regu larly throughout a layer repeating thermal bridges is included in U value calculations by added the details of the thermal bridge to each bridged layer using the Edit material dialogue JPA Designer offers three different methods of entering thermal bridging e Using one of the built in defaults to set the bridging fraction and material Hence the commonly used term cold bridge However mortar in stone walls will usually reduce the rate of heat loss CHAPTER 7 WORKING WITH MATERIALS 44 e Setting the bridging fraction and bridging material directly e Entering the bridging dimensions and material TYPE Mortar joints 440 x 215 mm blocks exte Material Mortar Mortar joints 440 x 215 mm blocks external leaf BR 443 4 2 A rick Steel studs 1 2 mm
137. items 1 2 and 3 in Figure 18 4 Use the lt Tab gt key to move between fields You can also use the Inherit button to use the address details for the project in the current calculation see for instructions The Pass down button can be used to copy the address details to all other calculations in the project You can add plot numbers and drawing references to link the calculation to a set of drawings or a naming scheme Note the Date Figure 18 4 item 3 is used in an EPC lodgement as the survey date It is essential to enter a post code for the dwelling as the EPC recommendations are based on local climate conditions set by post code Where the dwelling does not have a full post code perhaps because it has not been assigned yet you need only enter the first block e g BT25 However the UPRN box and the get UPRN and clear UPRN buttons are only used when preparing to issue an EPC Dwelling details Project Information contains general information about the dwelling e Building type Figure 18 4 item 7 this is used in the Energy Performance Certificate Select the closest matching value from the drop down It is particularly important to select the correct option for flats e Country the regional authorities in the UK have implemented SAP in slightly dif ferent ways You must use the Country drop down to select the correct location to ensure the dwelling is tested against the appropriate regulations CHAPTER 18
138. ithin each dwelling which will be treated as the living area in JPA Designer by changing the Room type from Heated space the standard setting for rooms in a dwelling to Dwelling living area For each dwelling 1 Select the room s which will form the living area 2 In the Room settings section set the Room type to Dwelling living area Figure 32 4 33 Exporting from VE In the export process VE creates a several files containing the geometry data for the se lected dwellings and passes them to JPA Designer which then imports the data and cre ates a SAP calculation for each dwelling During import stage JPA Designer offers two options which affect the import format e the SAP version and e how individual elements of the VE model are treated 33 1 SAP version Currently there are two different versions of SAP in use across the UK e SAP V9 90 2009 this version is valid for Scotland until October 2015 and for Northern Ireland e SAP V9 92 2012 valid for England to Part L 2013 and for Wales to Part L 2014 SAP V9 92 will be used in Scotland from October 2015 although it may be used for preliminary calculations prior to that date 33 2 Consolidation of elements VE defines each bounding surface of a room as a separate element potentially producing a large number of elements in the JPA Designer Walls roofs and floors tab JPA Designer can reduce the number of elements by consolidating elements of the same type into o
139. ity are set to zero This is intended to model the effect of ventilation removing moisture from the cavity for further information seesection 1 7 AA Vented cavities require the following information e Type select Vented cavity e Description type a description of the layer this will appear on the report e Thickness enter in millimetres mm e Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 00 MNs g gt If the inner face of the cavity is a low emissivity surface you will need to adjust the resistance to take account of that The methodology was described in BS 5250 1989 but is not included in later versions of the standard the vented cavity type is included mainly for backward compatibility CHAPTER 7 WORKING WITH MATERIALS 42 Low emissivity cavities A cavity which has one or more faces lined with a material with low surface emissivity will have a lower rate of heat transfer by radiation than a cavity with conventional high emissivity faces Including such a low emissivity cavity within a construction will reduce the overall rate of heat loss through the construction in some cases by as much as 10 There are several types of material with low emissivity surfaces e insulation boards with reflective surfaces such polyisocyanurate boards e plastic films with aluminium foil facing e membranes with metalised faces e multi foil insulants To be eff
140. ive humidity 15 C 20 C 25 C 1 Storage areas lt 50 lt 35 lt 25 2 Offices shops 50 65 35 50 25 35 3 Dwellings with low occupancy 65 80 50 60 35 45 4 Dwellings with high occupancy sports halls 80 95 60 70 45 55 5 Special buildings e g laundry swimming gt 95 gt 70 gt 55 pool Creating new data sets You can build up and save sets of internal and external environmental conditions to use in condensation risk analysis This is particularly useful when examining air conditioned buildings which have design values for temperature and humidity User data is stored in a file Env_user txt which is kept with the other user data files in c ProgramData JPA JPA Designer file location correct for Windows 7 see Technical CHAPTER 15 CONDENSATION RISK ANALYSIS IN JPA DESIGNER 86 note 2012 01 for other versions of Windows Currently the only way to add data sets is to edit Env_user txt in a text editor such as Notepad Figure 15 2 Before editing Env_user txt make sure JPA Designer is not running al Env_user tet Notepad File Edit Format View Help 0 O Internal 25 50 25 50 25 50 25 50 25 50 25 50 1 O External 25 50 25 50 25 50 25 50 25 50 25 50 O 1 Internal 30 90 30 90 30 90 30 90 30 90 30 90 1 1 External 30 90 30 90 30 90 30 90 30 90 30 90 Figure 15 2 Editing the Env_user txt file Within Env_user txt the data for an external location or an internal design condition is on one line with each line separated by
141. k with then click Open The project opens in the Project Manager window CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 17 3 7 Adding calculations to a project You can add new calculations to a project in the Project Manager window To add a new U value calculation to a project 1 From the menu bar select Insert gt U value calculation The Description dialogue opens Figure 3 5 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 Description Enter a description for the dwelling Mid terrace type 1 OK Cancel Figure 3 5 The Description dialogue To add a new SAP calculation to a project 1 From the menu bar select Insert gt Dwelling SAP v9 92 2012 calculation gt Single dwelling The Description dialogue opens Figure 3 5 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 90 9 81 9 80 and 9 70 of SAP as well as SAP calculations for multiple dwellings Follow the same basic procedure to add PV assessment and Psi value assistant calculations to a project When naming U value and SAP calculations avoid using the Windows restricted char acters lt gt otherwise you will have problems creating PDFs of calculation reports see for a more detailed explanat
142. ks 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 If you have selected solid ground floor in the U value Construction dialogue the Floor Type buttons will be greyed out If you have selected suspended ground floor you will be able to chose between Suspended block and beam and Suspended Floor dimensions The thermal resistance of the ground for a particular floor is affected by the ratio of its perimeter and area The perimeter length expressed in metres is measured along the finished internal surfaces of exposed and semi exposed 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 To enter the Floor dimensions e If you have calculated the Perimeter Area ratio you can enter it directly in the P A box e Alternatively tick the Calculate it box and enter the Perimeter and Area dimen sions Deck The data required for this section depends upon the type of construction specified in the Floor Type section e Solid floor no deck data required e Suspended block and beam floor Figure 10 2 the program calculates the resis tance using the following data The block Width Thickness and Conductivity The beam Web width and Beam conductivity The Screed depth and
143. l resistances of the layers The correction factors are added to the raw U value unless their total is less than 3 of the raw U value in which case they are ignored The values for correction factors are displayed in the main U value window next to the final U value U value calculations should also be adjusted for e The effect of having an unheated space to the cold side of the construction tion 8 5 e Brackets in rainscreen cladding systems section 8 4 8 1 Mechanical fasteners Metal fasteners which penetrate layers of thermal insulation reduce the effectiveness of the insulation that effect has to be included in U value calculations using the correction factor dUf Common constructions which require the correction are e Cavity walls with partial or full fill cavity insulation e Warm pitched roofs where insulation is laid over the rafters and restrained by coun terbattens fixed back to the rafters e Warm flat roofs where the insulation and or the waterproof membrane is mechan ically fixed to the deck 47 CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 48 There is no need to apply a correction e to constructions without fasteners e g solid masonry walls e for fasteners with both ends in contact with metal sheets e for wall ties across an empty cavity e for wall ties between a masonry leaf and timber studs e where the thermal conductivity of the fastener or part of it is less than 1W mK such as plast
144. lated because internal doors can be left open Three storey houses or other situations with two connected storeys of which one is more than 4 5 m above ground level often have floors which have fire doors on to stairs that prevent cross ventilation m Slightly open refers to windows that can be securely locked with a gap of about 50 mm Often this option will not give sufficient ventilation Figure 26 1 Overheating data on the Overheating and cooling tab Dwellings must not have an excessive risk of high internal temperatures in summer as a result of solar gain The test for overheating risk is set out in Appendix P of the SAP doc ument overheating risk depends on the predicted amount of solar gain and the thermal mass of the dwelling The result of the overheating assessment is shown in the main SAP window a dwelling with a high risk of overheating will not comply with regulations Most of the data for the calculation is entered elsewhere in the SAP calculation from data so the only information required is the Effective air change rate You can either tick the Enter value box and enter a design air change rate in air changes per hour ach or use the Building and Window opening drop downs to set default values 156 2 Cooling Dwelling has feed air conditioning system Cooling System type Compressor control Cooled fraction enter 0 if there is no cooling 0 0000 aitor muis Onati Energy label class A Packaged 0 Mo
145. layer sg lambda 9 932 idle thidmess dO mm w m K Description optional Deptht mm Area m dO mm lambda W m K Back end 120 120 50 0 032 Description optional Deptht mm Area m dO mm lambda W m K Front end 140 50 50 0 032 Description optional Depth t mm Area m dO mm lambda W m K l t a Triangular area thinnest at apex ft Description optional Thickness mm Area m lambda W m K i Pa Flat boards Z Calculations apply to roof pitches not exceeding 5 Cancel Total area 170 00m2 Figure 9 5 The Tapered Areas dialogue 9 5 Tapered layers Tapered insulation layers are commonly found on flat roofs to create drainage falls on an otherwise flat deck Because the thickness of the insulation varies across the roof the average U value of the roof has to be calculated using the method in Annex C of BS EN ISO 6946 2007 4 The method requires the roof to be divided into a series of blocks which will be of e rectangular plan with their greatest thickness on one side and least at the other other e triangular plan which have their thickest part at the one corner and slope down to the other corners e triangular plan which have their thickest part along one side and slope down to the other corner Each block in the calculation has a minimum thickness of insulation dO and a taper height t Depending on its size a roof may have several blocks of each type each with diffe
146. le life of the building 22 2 Editing multiple openings Changing the specification for openings once they have been added to a calculation can be a time consuming process JPA Designer has two tools to make the process quicker by enabling you to copying certain parts of the window data for one window to other windows in the dwelling or project The only data items copied to the windows are CHAPTER 22 OPENINGS 132 e Glazing e Double glazing air gap e Frame type e g window value To copy values between openings 1 Open one window in the Edit Doors Windows amp Rooflights dialogue Figure 22 3 2 Adjust the data for the window if necessary 3 Click one of two buttons e Copy these values to all this building s windows clicking this button sets the window data for all windows in the dwelling to that the currently viewed win dow e Copy these values to all the buildings in this project clicking this button sets the window data for all windows in all the dwellings in the JPA Designer project to that the currently viewed window 4 JPA Designer displays a confirmation dialogue Click Yes to carry out the changes or No to ignore them The operation cannot be un done automatically Change Multipe U values Cox Enter a new U value for all the selected items x cm Figure 22 4 The Change Multiple U values dialogue You can also change the U values of several openings at the same time without adjusting
147. lected duct e The duct is now shown in the Ventilation tab Approved installation schemes Theoretically a ventilation system fitted under an approved installation scheme will be more efficient than one fitted without quality control Therefore ticking Approved instal lation scheme improves the efficiency of a whole house ventilation system However at the time of writing 2015 02 11 there is no such scheme in place and there is no reason to tick the box 21 Walls roofs and floors The data on the opaque building fabric walls roofs and floors is used to calculate the rate of fabric heat loss for the dwelling through building elements the rate of heat loss through junctions between elements the thermal mass of the dwelling The data is entered using the Walls roofs amp floors tab of the SAP Worksheet values dialogue Figure 21 1 21 1 Defining building elements SAP 2012 requires data for all elements of the building fabric including Exposed elements which separate the building interior from outside or from an unheated space or from an adjacent occupancy with a different heating pattern Party elements which separate the dwelling from another space with a similar heat ing pattern Internal walls and floors The data required for each element depends on its function the principle items being Area the surface area of the element in m which should be measured to the boundaries of internal finishe
148. lick OK The new product is added to the category To edit an existing user defined material CHAPTER 13 EDITING THE PRODUCTS DATABASE 78 1 Select the product you wish to edit Click the Edit product button The Edit material dialogue opens 2 3 Make the changes in the Edit material dialogue chapter 7 4 Click OK The product information is updated To clone an existing product in a user defined category 1 Select the product and click the Clone product button A copy of the product will be inserted in the category 2 Click on the clone to edit it To delete a product from a user defined category 1 Select the product you wish to delete 2 Click the Delete product button The product is deleted r Search Database SEs Search for Direction Forward Back 4 Ignore case Find next fl Llose Figure 13 2 The Search Database dialogue You can search the database to find specific products 1 Click the Search button The Search Database dialogue opens Figure 13 2 2 In the Search Database dialogue enter the text you want to search for and the di rection the program should search through the database forwards or backwards 3 Tick the Ignore case box if you want the search to ignore capitals and lower case letters 4 Click Find first to start the search The program will display the first matching product in the Products pane 5 Click Find next to go on to the next matching product
149. lid the module will open The pro gram will record the date and time of that successful check e If the program is unable to connect with the database for example because you are using your lap top away from your office it will look at the date of the last successful check if that is less than seven days ago then the module will open If the program is unable to connect with the database and the last successful check is more than seven days ago then it will not open the module e If the check is successful and the licence is not valid the calculation will not open If you often use JPA Designer away from the office there are two features you can use to prevent problems with the licence check e The Project Manager tool bar displays the length of time since the last successful licence check provided the values shown are green the module will open e The Check licence on line button on the tool bar will force a licence check and re set the time since the last check to zero You should force a check if you expect not to have an internet connection for a few days 2 5 Updates JPA Designer is continually being developed to introduce new features to get the best from the program it is worth making sure you are using the latest version You can find the version number by selecting Help gt About from the menu bar in JPA Designer and compare that with the version number shown on our www techlit co uk Higher numbers and letters indicate
150. ll vented cavities cavities with substantial air exchange with outside e slightly vented cavities cavities with some air exchange with outside e vented cavities a type of well vented cavity originally intended for use with con densation risk analysis Not widely used Although the thermal resistance of a cavity can be calculated in JPA Designer see fion 7 3 it is usually entered as a default value appropriate for the direction of heat flow and the thickness range The Product Database contains standard resistance values taken from BS EN ISO 6946 Clear cavities A clear cavity is an unvented cavity which has openings to outside of less than 500 mm m For example a cavity in a cavity wall will be classified as an unvented cavity because the openings provided by the weep holes will be less than 500 mm m limit Clear cavities require the following information e Type select Clear cavity e Description type a description of the layer this will appear on the report e Thickness enter in millimetres mm e Thermal resistance enter in m K W e Vapour resistance cavities have a vapour resistance of 0 00 MNs g CHAPTER 7 WORKING WITH MATERIALS 40 Bridged cavities Bridged cavities such as those in some timber framed constructions are treated the same as unvented clear cavities but with bridging details added section 7 4 Bridged cavities require the following information e Type select Bridged cavity e Descript
151. ls Delayed start programmer at least 2 room thermostats Select Load weather compensator Select Heat emmiters Source of Efficiency Radiators Select from the product database Underfloor pipes in concrete slab Underfloor pipes in insulated timber floor Underfloor pipes in screed above insulation Fan coll urit Use manufacturer s declared SEDBUF value Make Model Underfloor heating also has radiators SEDBUE Central heating pump in heated space mee TERTE 0 00 5005 2009 Condensing Central heating pump 20173 or later Modulating Keep hot Facility Keep hot fuel Boiler has load or weather compensator Hone Timed Un timed Main fuel Elec C Enhanced load compensator F Boiler Interlock Use default value Flue Draught Range Cooker o4 ooz Urn known Un known Hcaze ki 0 0000 Open Room sealed Natural water kw 10 0000 da Water Separated conservatory with fed heater F Earned flue 5 Fanned Design flow temp unknown Dwelling in smoke control area No Yes Don t know Figure 24 1 The primary heating tab showing two main heating systems 144 CHAPTER 24 PRIMARY HEATING 145 24 1 Dwellings with two main heating systems SAP 2012 can account for the uncommon case of a dwelling having two main heat ing systems which are designed to heat the house together The two systems may be configured to heat the all the dwelling together or to heat parts of it separately v
152. lude the Prod ucts database which provides key data on generic construction materials and cavities as well as data on 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 Whilst you can create edit and delete user defined categories and materials you can not edit or delete branded or generic categories or materials However you can clone a generic or branded material and make changes to the cone leaving the original un touched To make changes to the Products database you must first open the Edit database dialogue Figure 13 1 by selecting Edit gt Database from the main menu To add a user defined category 1 Click the New category button 2 Enter the name of the category in the New category dialogue 3 Click OK The new category is created To rename an existing user defined category 1 Select a category by clicking on it 2 Click the Edit category button The Edit category dialogue opens 3 Enter a new name then click OK The category is renamed To clone a category 1 Select the category to clone by clicking on it 76 CHAPTER 13 EDITING THE PRODUCTS DATABAS
153. ms with a bath Number of mixer showers in rooms without a bath Total number of baths and showers any type 0 Number of baths and showers whose waste water is routed through the WWHRS 0 Dedicated WWHRS storage volume litres 0 00 Figure 28 2 Entering data on WWRR systems CHAPTER 28 RENEWABLES AND SPECIAL FEATURES 161 Waste water heat recovery systems WWHRS use heat exchangers to recover heat from the heated water passing out of the wastes of showers and baths WWHRS are either Instantaneous recovering heat from waste water from mixer showers as it is dis charged in one of three waysll System A output of the heat exchanger is fed to both the shower and the combi boiler or hot water system System B output of the heat exchanger is fed to the shower only System C output of the heat exchanger is fed to the combi boiler or hot water system but not to the shower Storage recovering heat from multiple appliances to a store which then pre heats cold water to combi boiler or hot water system To specify instantaneous WWHRS In the PV amp Alt Tech tab tick WWHRS and click the Lookup button The WWHR Database dialogue opens Figure 28 2 Use the Manufacturer drop down to select the manufacturer then highlight the specified product in the list and click Select as system 1 Repeat this process if there is a second system but click Select as system 2 Enter the total rooms with shower and or bath For each
154. n 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Delete selected ttem JPA Designer asks you to confirm the deletion 3 Click Yes to delete the calculation or No to abandon the deletion If you click Yes the calculation is removed from the project 3JPA SAP v2 was the precursor of the JPA Designer SAP module CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 24 3 15 Merging projects Using the Merge projects function you can copy 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 Merging does not change the project you are copying from To merge calculations from one project into another 1 In Project Manager open or create the project you want to receive the calculations 2 From the menu bar select File gt Merge a project from disk into this Project The Open dialogue appears 3 Select the file which contains the calculations and click Open JPA Designer adds the calculations to the current project and lists them in the Project Manager win dow You can now edit them without affecting the original project Part Il U value calculations 25 4 The JPA Designer U value modules JPA Designer offers two U value modules e U value 2014 calculates U values for walls roofs and intermediate
155. n see for an explanation of how region settings affect calculations To copy project details from Project Manager 26 CHAPTER 4 THE JPA DESIGNER U VALUE MODULES 27 1 In the U value module select Edit gt Project Information from the menu bar The Project Information dialogue opens 2 Click the Inherit button 3 At the prompt choose whether you want the calculation to inherit the region settings for the project or not 4 Any information you entered in Project Manager is copied to the Project Informa tion dialogue here 5 Click OK To enter new project details 1 In the U value 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 3 If you need to use a region other than the default select the new Region in the list 4 Click OK when you have entered all the data you need To copy project details from the current calculation to all other calculations in project 1 Enter the address details in the Project Information and Options dialogue 2 Click Pass down 3 At the Information dialogue click Yes In most cases you will want to inherit the project region settings 5 Construction details The thermal performance of building element will be affected by the type of element and its position within a building These conditions are set in the U v
156. n Baxi Potterton Baxi Combi 130 HE GC No 47 590 04 89 6 Baxi Potterton Baxi Potterton Potterton Promax 24 HE GC No 41 590 62 90 53 Baxi Potterton Baxi Potterton Potterton Promax System HE GC No 41 590 69 90 6 Baxi Potterton Baxi Potterton Potterton Promax 15 HE GC No 41 590 58 90 4 Delete selected storage heater Figure 24 4 Using the Product Characteristics Database to set the boiler efficiency To use the PCDF 1 Select the Select from the boiler database radio button 2 Click the Select boiler button The BRE Boilers Database dialogue opens lure 24 4 3 Select the Boiler manufacturer from the drop down The program then displays the list of available boilers 4 Scroll down the list and click on a boiler to select it You can scroll sideways to view the details of each boiler such as its efficiency and configuration CHAPTER 24 PRIMARY HEATING 150 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 Primary heating tab shows the summary details for the chosen boiler There is no need to enter flue draught or keep hot details as all that information is present in the database entry for the boiler To enter a SEDBUK value directly 1 In the Boile
157. nal Mortar 0 88 0 067 leaf BR 443 4 2 Steel studs 1 2 mm 600 mm centres Steel 50 0 002 Steel studs 1 2 mm 400 mm centres Steel 50 0 003 Timber framed wall prefabricated panels Prefab panels 0 12 0 150 default fraction BR 443 4 5 1 Timber framed wall prefabricated panels Prefab panels 0 12 0 125 lower fraction BR 443 4 5 1 Site formed timber framed wall default Softwood 0 13 0 150 fraction BR 443 4 5 1 Site formed timber framed wall lower fraction Softwood 0 13 0 125 BR 443 4 5 1 Ceiling trussed rafters 35 mm 600 mm cc Softwood 0 13 0 068 1 other timbers BR 443 4 6 1 Ceiling 50 mm joists 400 mm cc 1 other Softwood 0 13 0 135 timbers BR 443 4 6 1 Ceiling default 48 mm 600 mm cc 1 Softwood 0 13 0 090 other timbers BR 443 4 6 1 Timber floor default 38 mm 400 mm cc Softwood 0 13 0 110 1 other timbers BR 443 4 6 2 Plasterboard battens 47 mm 600 mm cc Softwood 0 13 0 118 rails BR 443 4 7 2 l beam flanges 38 mm wide default fraction Softwood 0 13 0 150 BR 443 4 5 2 l beam flanges 38 mm wide lower fraction Softwood 0 13 0 125 BR 443 4 5 2 l beam flanges 48 mm wide default fraction Softwood 0 13 0 170 BR 443 4 5 2 l beam flanges 48 mm wide lower fraction Softwood 0 13 0 145 BR 443 4 5 2 l beam web 4 to 8 mm BR 443 4 5 2 OSB 0 13 0 040 Thermal bridge Type Material Hardwood 700kg m3 Angle 0 Proportion bridged o 10000 Bridge width mm 50 1 Non bridge width mm 450 2 N
158. nd any correction factors To print results 1 On the File menu click Print or click the Print button on the tool bar The Sections To Print dialogue opens Figure 12 1 2 If you have several user identities see ection 2 8 select the one you want to use in the Identities list 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 mois ture table for condensation analysis and whether the calculation should show the logo of the BBA TIMSA U value accreditation scheme 4 If you want to include a watermark over the calculation tick Print watermark text You can also modify the wording angle and font size of the default text 5 Click OK The Print preview window opens 6 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 To create a PDF calculation report 1 On the File menu bar select Create PDF or click the PDF button on the toolbar A dialogue asks if you want to open the PDF when it is created 2 Select Yes or No The Sections To Print dialogue opens Figure 12 1 72 CHAPTER 12 CREATING REPORTS 73 Sections To Print x Sechons to print 11150 moisture table L Thermal mass C Tapered insulation Options Print TIMSA logo C Print watermark text Test DRAFT Angle degrees 45 Font size points 80
159. ne element with an area equal to the total area of the originals There are three ways of importing elements e Each element in VE becomes an element in JPA Designer This one to one corre lation produces a large number of elements in the Walls roofs and floors tab but allows individual elements to be tracked between the two programs All the VE fabric elements of the same type within a room are consolidated into one element in JPA Designer For example if a room is bounded by two internal partition elements of the same construction with areas of 10 and 15 m then in JPA Designer there will be one internal wall element with an area of 25 m This option reduces the number of elements in JPA Designer while allowing bounding elements of rooms to be distinguished 173 CHAPTER 33 EXPORTING FROM VE 174 e All the VE fabric elements of the same type within a dwelling are consolidated into one element in JPA Designer For example all the internal partition elements of the same construction within all rooms of the dwelling will be consolidated This minimises the number of elements produced in JPA Designer making it easier to see the overall picture and to adjust the U values of elements when required However no matter which consolidation option is chosen JPA Designer does not con solidate wall elements which contain openings 33 3 The export procedure SAP Analysis Compare Dwelling and Target emission rates Figure 33 1 St
160. ng section 3 7 2 Enter any project information in the Project Information dialogue 3 In the U value Construction dialogue select Solid ground floor or Suspended ground floor enter a description for the construction then click OK The Ground Floor Details dialogue opens 4 Enter the data for the ground section 10 1 Click OK 5 Add the remaining layers of the floor construction Include layers to represent e Screed e Insulation e Flooring such as particle board Omit 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 63 CHAPTER 10 GROUND FLOOR U VALUES 64 Ground Floor Details a eel Solid Pas O 00000 Caleulate it W E r m 0 0015 him 0 225 Suspended block amp beam Perimeter mj 294 o Uw pnek 1 700 fw 0 050 lambda 1 500 W m s 5 000 Default P Help Floor type Floor dimensions Suspended Ground Floor Details for 150 13370 i w m 0 300 4 Suspended Area r 0 00 Deck underside surface resistance mrk 0 170 Subfloor ground surface resistance mK 0 170 Resistance mik Description Block Width mm 440 Thickness mm 100 Conductivity W mK 0 000 Horizontal Vertical 5 Beam Web width rom Bo Resistance of insulation on ground Ag rm kzw 0 000 Insulation name
161. ng the unheated space from outside 9 Advanced calculations 9 1 Light steel framed structure The high thermal conductivity of steel means the combined method must be modified for elements where some or all of the insulation is bridged by light steel framing JPA Designer uses the modified calculation method which was published in BRE Digest 465 U values for light steel frame construction There are three different forms of light steel framed structures e Warm frame constructions all the insulation is outside the steel framing e Hybrid constructions some insulation is fitted between the steel studs and ad ditional insulation placed on the outside of the studs to reduce thermal bridging through the steel e Cold frame constructions all of the insulation is included within the thickness of the steel components and is bridged by it Light stee frame Construction Type BRE Digest 465 Not a light stee frame Construction Warm Frame Stud depth d mm 150 0 Flange width not exceeding 50mm ee not exceeding 80mm Cold Hybrid Stud spacing s mm 400 0 Element description Steel framed wall Figure 9 1 Setting the type and details of light steel frame construction The procedure for calculating the U value of a light steel framed element using JPA De signer is the same as for any other element but with the following modifications 1 Identify the element as light steel framed and enter the framing details Figure 9 1
162. nts to note when adding junctions e there is a distinction between junctions to exposed walls and junctions to party walls the latter commonly have lower values e if the dwelling has curtain walling there is no need to include the lengths of the window surrounds as the thermal bridging heat losses will have been included in the overall U value for the curtain wall system User calculated y factor An approximate value for Htb can be obtained by multiplying the total area of the exposed elements floors walls and roofs by a factor y However with the introduction of Part L 2013 England and Part L 2014 Wales the method is not valid for building regulations compliance for new dwellings The method may be used for dwellings where the original SAP 9 81 or 9 90 calculation has been upgraded to SAP 9 92 in order to lodge an EPC To use a user defined y value This procedure may be used where y has been calculated for that type and configuration of dwelling To use a calculated value for y 1 In the Thermal Bridging section select Enter y value manually 2 Tick Imported SAP 9 81 9 90 for EPC issue only 3 Enter the value for y in the box 4 Enter a reference for the calculated value of y in the Calc ref box The reference must refer to the calculation used to obtain the stated value If you choose this option the program will not display the TER worksheet nor the Com pliance report Default y factor An approximate value for
163. o specify the extent of insulation to the primary pipework the pipework between the heat source and the hot water storage vessel If the dwelling has solar panels complete the Solar panel details section of the Water heating tab Section 23 10 23 6 Boiler with thermal store Use this option for thermal stores containing water heated by a separate boiler with domestic hot water provided by means of heat exchanger within the store Enter the following data for the store CHAPTER 23 WATER HEATING Source of domestic hot water Boiler with a thermal store Hot water tank Volume I 210 0 Declared loss factor if known EW heday Heat pump heat exchanger area 0 00 CPSU Thermal store in airing cupboard Yez No Storage tank insulation S Factory Thickness mm Jacket FO 00 Thermal store type Hot water only Integrated lz the Thermal Store close coupled Yes No Hot water tank heater Single electric immersion heater Dual electric immersion heater Boiler feed From 2nd main heating system Summer immersion heater Hot water only boiler Fuel g Thermal store or CPSU has seperate timer for heating store Cylinder in heated space Cylinder thermostat Override heat pump database values DH vessel within micro CHP 4 Insulated primary Separate timer for domestic hot water Figure 23 5 Data entry for a thermal store hot water system e Hot water tank volume select one of the default values
164. of fuel used Where there is more than one Appendix Q technology use the New and Edit buttons to add those technologies to the calculation Note that all the technologies which required Appendix Q with SAP 9 81 can all be entered directly in JPA Designer in SAP 2012 There are separate spreadsheets for different versions of SAP make sure you use the appropriate version 29 Compliance and reports Once you have entered all the data for the dwelling you can check its compliance status and produce worksheets and compliance reports as PDFs or in hard copy 29 1 Checking compliance Once the program has enough data to complete a SAP calculation it will show the cal culation results including the TER and DER and 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 18 2 You can see a more detailed report on the compliance status on the Compliance Checklist which lists the main criteria the SAP module tests and shows the status of the dwelling against each one The compliance check window is particularly useful when the dwelling has failed on one of the secondary criteria such as the efficiency of heating controls or excessive losses from the hot water cylinder To open the compliance checklist double click on th
165. on tains the opening The software uses this information to calculate the net areas of the elements The elements offered in the drop down will only be those appropriate for the Opening type For example if you have set the Opening type to Window the Opening within drop down will show only walls Similarly if you chose Rooflight then Opening within will show only roof elements e Glazing Use the drop down to select the type of glazing considering the number of leaves of glass the gas within the cavity or cavities and any low emissivity low E coating Even if you go on to enter a manufacturer s U value and or g window value you must still make a selection here to set the correct parameters for daylight e Double glazing air gap Use the radio buttons to select one of the default values or enter your own value If the gap is greater than 16 mm select Other and enter a width in the box CHAPTER 22 OPENINGS 130 Edit Doors Windows amp Rooflights Opening type window Opening within alls External walls Glazing Double glazed air filled low E En 0 2 hard coat ka Double glazing air gap Frame type Emm Other wood Hetal 4mm thermal break Hetal 20mm thermal break 12mm 12mm G o PY C u Hetal 6mm thermal break Metal 32mm thermal break 16mm Metal no thermalbreak Hetal 12mm thermal break Use user definedframe factor user definedframe factor 0 00 U value Mart 1 70 Source of U value 7 en Default g window val
166. on bridge height mm 0 0 Specify proportion Bridge thermal conductivity W mK 0 18 Bridge thermal resistance m K W 0 72222 e ee a En Figure 7 7 Entering thermal bridging using dimensions CHAPTER 7 WORKING WITH MATERIALS 46 3 Enter the Proportion bridged To enter thermal bridging details using dimensions 1 DO Oo A Use the Bridge type radio buttons to determine whether the bridging is 1 dimen sional or 2 dimensional e one dimensional e g timbers running in one direction or e two dimensional e g mortar joints which run vertically and vertically 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 In the Thermal bridge section of the dialogue Figure 7 7 select the bridging ma terial from the Material drop down The program sets the Bridge thermal conduc tivity 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 Enter the Non bridge width in mm For two dimensional bridging enter the Non bridge height in mm 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 en
167. ons If you want to carry out a calculation which is very similar to an existing calculation in a project you can duplicate the calculation and then change the copy leaving the original calculation untouched To duplicate a calculation 1 In the Project Manager window click once on the calculation to select it 2 From the menu bar select Edit gt Duplicate item The Description dialogue opens 3 Type a name for the duplicate calculation and click OK A copy of the original calculation is added to the project When naming a calculation avoid using the Windows restricted characters lt gt otherwise you will have problems creating PDFs of calculation reports see for a more detailed explanation You can now work with the duplicate calculation in the usual way 3 11 Importing U value calculations When you need to re use an existing U value calculation in a new project you can import a copy of the calculation from its original project into a new one To import a calculation into the current project 1 On the Program Manager File menu select Import U value from another JPA De signer project 2 In the Open dialogue select the project containing the original U value calculation Click OK 3 In the Import U value from Project dialogue click on the calculation to select it then click OK The U value calculation is copied into the current project Importing existing U value calculations into a new project is a qui
168. ons on how to enter data into the program it does not offer authoritative guidance upon SAP 9 92 nor the Building Regulations We suggest you use this manual in conjunction with the government s guide to SAP available from the BRE web site www bre co uk sap2012 Approved Document L1A and the Domestic Building Services Compliance Guide both available as PDFs from the Planning Portal www planningportal gov uk 18 2 Preparing to carry out a SAP 2012 calculation Before starting a SAP calculation you should ensure you have all the input data including e dwelling floor area e the ventilation strategy For section 6 of the Scottish Building Standards 2010 Scotland and for Northern Ireland you should continue to use SAP 2009 V9 90 which is described in the JPA Designer 5 01 user manual 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 95 CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 96 the design or achieved air permeability U values values kappa values and areas of external and party walls roofs and floors you can carry out the U value and value calculations using one of the JPA Designer U value modules Vvalues and areas of internal walls and floors w values psi values for junctions and the lengths of junctions U values areas orientation and glazing details of windows
169. or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 The hot water tank heater will always be Boiler feed Use the radio buttons and tick boxes to indicate whether The thermal store is in an airing cupboard The thermal store is close coupled The thermal store is integrated or hot water only Close coupled means the store is either within the same casing as the boiler or separated from the boiler by no more than 1 5 m of insulated pipework There is a separate timer to the thermal store for the heating store Use the three lower tick boxes to indicate whether e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e there is a separate timer for the domestic hot water If the dwelling has solar panels complete the Solar panel section of the Water heating tab see section 23 10 CHAPTER 23 WATER HEATING 139 Source of domestic hot water Combined primary storage unit CPSU Hot water tank Storage tank insulation Hot water tank heater i Single electric immersion heater Volume I 210 0 amp Fact Thickness mm Ing tric ae 50 00
170. orm best followed by having all accessible pipework insulated the first 1m of pipework insulated while uninsulated pipework has the worst per formance If the dwelling has solar panels complete the Solar panel details section of the Water heating tab Section 23 10 23 2 Instantaneous water heating at point of use For a system which heats the water on demand at the point of use you need only select the Fuel using the radio buttons Source of domestic hot water Instantaneous water heating at point of use Fuel Electric Bulk LPG Mains gas Propane Figure 23 2 Entering an instantaneous hot water heater 23 3 Combination boiler Combination boilers provide heating and hot water they may be instantaneous with up to 15 litres storage or they may contain small primary or secondary storage tanks see Appendix B of the SAP 2012 document for definitions 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 23 WATER HEATING 136 Source of domestic hot water Combination boiler Hot water tank Storage tank insulation Combination boiler type Volume fl 210 0 x Factory Thickness mm Instantaneous Declared loss factor if Jacket 20 00 Storage with a primary store known kW h day Storage with secondary store Figure 23 3 Hot water o
171. ource of value Table K1 Accredited detail Cancel Not accredited detail Default il pee arte hoes lee mai h m Pe So SS os Sees tis m mi h m Flam r m lm hr Figure 21 4 The Junction dialogue 4 Click Flush to remove all unused junctions To add a junction 1 Click Add The Junction dialogue opens 2 Select the Junction type from the drop down 3 Enter a Description this is optional but adding a description will make it easier to manage the calculation 4 Enter the Achieved linear thermal transmittance this is the value The program will offer standard values based on the junction type 5 Enter the Detail length the total length of the junction in metres 6 Set the Source of value which will be one of e Table K1 the value for an accredited detail from Table K1 of the SAP 2012 document The value is based on the junction type and cannot be edited e Accredited detail An accredited detail from a source other than Table K1 This can be used for a detail accredited by a third party scheme e Not accredited detail use this for a calculated w value e Default the value for the non accredited detail in Table K1 The value is based on the junction type and cannot be edited CHAPTER 21 WALLS ROOFS AND FLOORS 125 7 Click OK The junction is added to the Calculate Htb dialogue A report listing the junction data can be included in the calculation outputs seesection 29 2 There are two additional poi
172. p database values The tab now shows the Hot water tank data boxes e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2009 e Heat pump heat exchanger area Enter the area of the heat exchanger plates in m If the dwelling has solar panels complete the Solar panel section of the Water heating tab section 23 10 CHAPTER 23 WATER HEATING 141 Source of domestic hot water Community heating scheme domestic hot water only Hot water tank heater Single electric immersion heater Dual electric immersion heater Boiler feed From 2nd main heating system Summer immersion heater Hot water only boiler Hot water only community heating a Heat Source Boilers Fuel Heat from boilers mains gas He Dy New Fuel 7 SOUICES Sy Edit it pai Calina in heated pace l S Cylinder thermostat 4 Override heat pump database values DH cylinder within dwelling Charging Charging linked to uze ka DHW vessel within micro CHF Distribution Piping gt 1991 pre insulated medium temp variable flowy ka Figure 23 7 Settings for a community heating scheme which supplies only dome
173. project which are eligible for inclusion in the multiple dwellings calculation The right hand pane labelled 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 com pliance status In order to pass the Average DFFE and Average DER must be equal to or less than the Average TFEE and Average TER respectively 167 CHAPTER 30 MULTIPLE DWELLINGS 168 To carry out a multiple dwelling calculation 1 Carry out normal SAP calculations for a the units in the block 2 In Project Manager on the Insert menu click Dwelling gt SAP v9 92 2012 calculation gt Multiple dwelling 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 30 1 5 Click on a dwelling in the Available SAP v99 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 cli
174. ptions for combination boilers e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 If the dwelling has solar panels complete the Solar panel details section of the Water heating tab see bection 23 10 23 4 Community heating scheme The hot water for dwellings heated by community heating schemes can provided by im mersion heaters or by a heat exchanger fed from the scheme In all cases specify the hot water tank heater There may be additional data required depending on the configuration of the system e Where there is neither a hot water tank nor a heat exchange in the dwelling no further data is required e If there is a hot water tank within the dwelling tick DHW cylinder within dwelling enter the tank details Section 23 1 tick DHW cylinder within dwelling e If there is no tank and the hot water is provided by a heat exchanger tick Plate heat exchanger in Community Heating tick DHW cylinder within dwelling enter the volume of the heat exchanger enter the insulation type and thickness If the dwelling has solar panels complete the Solar panel details section of the
175. r No to cancel the deletion The summary data on all the elements defined for a dwelling can be exported to an Excel spreadsheet by clicking Send to Excel CHAPTER 21 WALLS ROOFS AND FLOORS 122 21 2 Linear thermal bridging SAP calculates the heat loss from thermal bridging at junctions between elements which is usually referred to as Htb heat loss by thermal bridging There are three methods of calculating Htb for a dwelling 1 Calculating the total heat loss from the length and linear thermal transmittance value for each junction type ection 21 2 2 Use a simplified method based on a calculated y factor section 21 2 This method is not valid for compliance calculations for new dwellings 3 Use a simplified method based on a default y factor section 21 2 Further information on the treatment of linear thermal bridging can be found in Appendix K of the SAP document amp New in SAP 2012 Thermal bridging at junctions With SAP 2012 as implemented in Part L 2013 England Part L 2014 Wales and Section 6 2015 Scotland user defined y values are no longer permitted The Htb calculation The linear thermal transmittance or w value pronounced psi value for a junction is the rate of heat loss through a one metre length of the junction measured in units of W mK Junctions are categorised as junctions between walls and other elements or components e g windows W values can be obtained from three sources 1
176. r efficiency section select the Use manufacturer s declared SEDBUK value radio button 2 Enter the Make and Model of boiler 3 Use the radio buttons to specify whether a SEDBUK 2005 or 2009 value is being used and enter the Declared SEDBUK value 4 Specify the type and fuel of any Keep hot facility 5 Set the Flue and Draught type 6 For range cookers you must also enter the values for case and dwater amp New for SAP 2012 boiler efficiency It is no longer permissible to use a directly entered SEDBUK value for final as built calculations for Building Regulations approval A directly entered value must be replaced by a boiler selected from the PCDF for the as built calculation To use the default value 1 In the Boiler efficiency section select the Use default value radio button The soft ware shows the default value for that boiler type 2 Use the radio buttons to enter the details of the Flue and Draught type 3 For range cookers you must also enter the values for case and dwater Note that the default values are generally too poor to comply with the standards in the Domestic Building Services Compliance Guide CHAPTER 24 PRIMARY HEATING 151 Storage radiator systems Storage radiator systems are heated with off peak electricity during the night and release that heat throughout the day For most configurations the only data required is that from the primary heating drop boxes amp New for SAP 2012 high hea
177. red in the Project Manager window The TFEE and DFEE results The TER and DER results CO N DB U B amp B Fabric U values for opaque elements floors walls roofs and for openings In each line the first number shows the worst highest U value and the second the area weighted average 9 Overheating risk assessment 10 Carbon dioxide emission and SAP results including the average Heat Loss Param eter HLP 11 Compliance zone This shows green for a pass and red for a fail If the dwelling does not comply you can hold your mouse cursor over this zone to show a tool tip identifying the primary cause of failure Figure 18 2 Double clicking on the zone will open the Compliance Checklist Average wall U value too high Figure 18 2 Tool tip showing the primary cause of failure Bhlaxt H aa f 1 28 GoGgeeuurs Conservation of Fuel amp Power in Dwellings SAP 9 92 Figure 18 3 The SAP toolbar 1 Return to Project Manager 2 Print 3 Exit JPA Designer 4 Project information ection 18 5 5 Dimensions tab chapter 19 6 Ventilation tab chapter 20 7 Walls roofs and floors tab chapter 21 8 Openings tab chapter 22 9 Hot water tab chapter 23 10 Primary heating tab chapter 24 chapter 25 11 Secondary heating tab 12 Overheating tab Photovoltaic and alternative technologies tab chapter 28 The toolbar buttons are shown in the majority of them open
178. rent areas and in some cases different minimum thicknesses In JPA Designer a tapered layer calculation is entered in two parts Note that simply calculating the U value based on the average thickness of insulation will substantially over estimate the thermal performance of the roof CHAPTER 9 ADVANCED CALCULATIONS 61 e all layers except the taper are added to the calculation e the individual blocks of the tapered layer are defined in the Tapered Areas dialogue Figure 9 5 The Tapered Areas dialogue requires three items of general information e a description of the layer you can use the name or type of insulation e the minimum tapered layer thickness that is the minimum depth of the insulation layer which is continuous across all parts of the roof measured in mm e the conductivity of the insulation lambda this is entered in W mK The data on the different roof blocks is entered in the three tables with each block having its own entry in the appropriate section with the following data e an optional Description which is useful for identifying sections of the roof e the taper depth t in mm e the area of the block in m If a block has a different minimum depth compared to the rest of the roof or has insulation with a different thermal conductivity you can insert a different value for d0 and lambda shows a roof with tapered insulation laid with falls towards the perimeter To calculate the U value the t
179. rs dialogue edit the values to match your requirements 8 2 Air gap correction Air movement through and around an insulation layer will reduce its thermal perfor mance The effect of that reduction is included in the U value calculation by a correction factor dUg which is derived from the relative thermal resistances of the insulation layer and the construction as a whole and from a coefficient dU which represents the size of gaps in the insulation layer Values for dU are e Where no air gaps penetrate the insulation layer and no air circulation is possible on its warm side dU 0 00 W m K e Where some air gaps penetrate the insulation layer and no air circulation is possible on its warm side dU 0 01 W m K e Where some air gaps penetrate the insulation layer and some air circulation is pos sible on its warm side dU 0 04 W m K CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 51 Alr gap corrector delta u 0 00 were F Hep Figure 8 5 Correcting for air gaps in insulation layers A value for dU must be set for every insulation layer To correct for air gaps 1 In the main U value window double click on the insulation layer The Edit material dialogue opens 2 Enter the appropriate value for dU in the dU box see Figure 8 5 then click OK Click the Help button to view the standard values for dU In many cases the default value of zero is appropriate 8 3 Rainwater cooling Inve
180. rted roofs or protected membrane roofs have some or all of the thermal insulation installed over the top of the waterproof membrane where it is restrained by aggregate or other ballast Rainwater falling on inverted roofs can percolate between insulation boards to the waterproofing membrane where it will increase the rate of heat loss The reduction in performance is represented within a U value calculation by the rainwater cooling correction factor dUr which is calculated from e The average rate of rainfall during the heating season p mm day e A drainage factor f which represents the fraction of p which reaches the water proofing membrane e A factor for increased heat loss caused by rainwater flowing on the membrane x Wday m Kmm Element Type Flatroof Eyt insulation layers xX 9 040 p 3 000 W Inverted Inver Fij Extruded polystyrene 555250 Concrete medium weight 855250 Roofing felt laid in bitumen BS5250 Alank lawer rimihle dick tea erlit Figure 8 6 Setting the rainwater cooling correction for an inverted roof In JPA Designer the data is entered using the U value Construction dialogue Figure 8 6 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 CHAPTER 8 CORRECTION FACTORS AND ADJUSTMENTS 52 1 From the menu bar select Edit gt Construction T
181. s Scotland and Northern Ireland e assess PV and wind turbine output calculations for feed in tariff installations e calculate U values for building elements e carry out condensation risk analysis to BS EN ISO 13788 JPA Designer includes many features to make the calculation process easier e Project based file system enables you to keep all the calculations for one develop ment in same project file e U value templates to speed up calculations e Links between U value and SAP calculations so that SAP calculations are automat ically updated when U value calculations change e Calculation results can be produced as PDF files for emailing e A database of common materials to speed U value calculations 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 In order to lodge and issue EPCs you will need to be a member of an accreditation scheme England and Wales Northern Ireland or protocol organisation Scotland You can find details of our partner schemes at www techlit co uk training accreditation CHAPTER 1 INTRODUCING JPA DESIGNER 3 1 1 Conventions for the manual The manual uses the following conventions lt angled brackets gt for keys on the computer keyboard e g the lt Enter gt key the sign indicates you should hold down one key while pressing another e g lt Alt F gt
182. s for external environmental conditions click the Default button Build up of condensate is assessed over a standard 60 day winter period that value can be changed using the Condensation build up period box 17 2 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 Building Use which are taken from BS 5250 and BS 6229 Table 7 92 CHAPTER 17 USING THE BS 5250 1989 CALCULATION METHOD 93 17 3 BS 5250 1989 results Once you have set the environmental conditions you can view the calculation results using the Results table section 16 3 and the Dewpoint graph section 16 2 On the results table the important columns are e Winter buildup which shows the build up of condensate over the 60 day winter period and e Annual buildup the amount of condensate carried over into the next year A nega tive figure indicates there is no condensation carried forward Both figures are given in g m 17 4 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
183. s 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 other wise leave the default value CHAPTER 22 OPENINGS 131 e Area You can enter the opening area directly into the Area box or you can select a size from the Window size drop down or you can enter the Width and Height of the opening Note the Area is entered in metres square but the values for Width and Height are entered in millimetres mm Where there is an overhang above the window you should use the Width and Height boxes to ensure the software correctly takes account of the overshading in the summer overheating calculation e Description The Description box allows you to enter a text description for the element The description does not affect the outcome of the calculation If you have set the source of U value to manufacturer or BFRC you must enter a description We strongly recommend you use the description box to enter a short description for every opening such as its number on the window and door schedule it is much easier to keep track of openings in the calculation when you have a description e Opening orientation The direction in which the opening faces determines how much light it will receive and will therefore affect how much solar flux will pass through the opening The orientation of an opening is set relative to the front eleva tion o
184. s space heating such as an oil or gas boiler or a default efficiency heat pump There are additional boxes to indicate the hot water is provided by the second main heating system the hot water is provided by the secondary heating system which might be a solid fuel room heater with a back boiler a default efficiency heat pump is supplemented by an immersion heater in the summer e Hot water only boiler a dedicated unit which supplies domestic hot water only Use the drop down to select the type of boiler then specify the Fuel CHAPTER 23 WATER HEATING 135 Use the three lower boxes to indicate whether e the hot water tank cylinder is in the heated space e there is a thermostat in the hot water tank cylinder required by Domestic Building Services Compliance Guide e the primary pipework between the boiler and tank is insulated tick box only dis played if boiler feed is selected required by Domestic Building Services Compli ance Guide Use the Primary insulation list to specify the extent of insulation to the primary pipework the pipework between the heat source and the hot water storage vessel amp New in SAP 2012 insulating pipework The calculation of heat losses from pipework between the heat source and water storage tank or cylinder has been revised You must now specify the extent of the insulation to that pipework referred to as the primary pipework Fully insulated pipework will perf
185. s unlikely that the exact number of lighting units will be known the simplest strategy is to set the total number of units to 10 or 20 then set the number of low energy units to give the correct proportion 15 out of 20 will give a proportion of 0 75 An accurate value is required for the EPC submission 19 4 Orientation The orientation of the dwelling is used with the data on openings for solar gain and overheating calculations To set the orientation select a direction in the Front of dwelling faces list e For a house it is usually easiest to treat the elevation containing the front door as the front face e For an block of flats it may be better to treat the front of the block as the front face for all flats rather than setting different front orientations for each flat The Application date is used in the EPC submission as the date on which the final EPC assessment was performed Clicking the down arrow will open a calendar CHAPTER 19 DWELLING DIMENSIONS 107 Front of dwelling faces Portti ha Application date 09022015 Ei Number of dwellings above 0 Number of dwellings below 2 Figure 19 2 Entering position in block for Scotland 19 5 Position in block The TER calculation for section 6 in Scotland calculates the output of solar panels on the notional dwelling from the roof area of the actual dwelling For flats and maisonettes that notional output is divided by the total number of dwellings beneath the roof area
186. sistances of the underside of the suspended deck and of the ground surface of the sub floor void are included in the calculation These are entered in Deck underside surface resistance and Subfloor ground surface resistance In most cases a value of 0 17 m K W is suitable however if the underside of the deck has a low emissivity surface for example the foil facing of an insulation board then a higher resistance may be used The resistance of any thermal insulation on the ground surface of the sub floor void Rg should be entered at Resistance of insulation on ground This insulation should not be entered as a normal layer in the calculation amp Details for solid ground floors The U value calculation for solid ground floors requires three pieces of data from the Suspended ground floor details section the height of the floor surface above the ground h the width of the walls w and the conductivity of the ground Lambda CHAPTER 10 GROUND FLOOR U VALUES 68 Table 10 1 Windshield factor Location Example Fw Sheltered City centre 0 02 Average Suburban 0 05 Exposed Rural 0 10 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 Vertic
187. stance The vapour resistance of a cavity is always zero Enter the thickness to ensure the the appearance of the Dewpoint graph The data for each type of material and cavity is described in more detail in chapter 7 If you have already carried out thermal calculations on the same construction you need only check that the vapour resistivity or resistance figures are correct Units of vapour resistance and resistivity JPA Designer uses the vapour resistivity with units of MNs gm and vapour resistance with units of MNs g If material data is quoted as u or sy values multiply by five to obtain the resistivity or resistance respectively You can find guidance on converting from European units and from permeability and permeance figures in Annexes E 7 and E 8 of BS 5250 2011 15 2 Environmental conditions The condensation risk calculation requires mean monthly data for e External Temperature Ext T and External Relative Humidity Ext RH the external conditions depend upon the building s location JPA Designer includes external temperature and humidity data for a number of weather stations around the UK and Ireland allowing you to select the nearest location to the project site Pick the nearest weather station to your site To view a map of locations click View location of Google Maps l For a worst case scenario select Eskdalemuir e Internal relative humidity Int RH for buildings which are heated and naturally ventilated th
188. stic hot water 23 9 Community heating scheme providing domestic hot water only Use this option for a community heating scheme which provides domestic hot water but does not provide the space heating Typically such system are found in flats or sheltered housing To specify a system e Set the Source of domestic hot water to Community heating domestic hot water only Figure 23 7 e Set the Heat Sources for the system ection 23 9 e Set the method of charging for the hot water supply using the drop down this will either be a flat rate charge for the heating or will be linked to hot water usage e Set the distribution method using the drop down e If there is a solar panel linked to the system enter its details section 23 10 e If there is a hot water tank or cylinder within the dwelling tick DHW cylinder within dwelling additional data boxes will be displayed for e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 CHAPTER 23 WATER HEATING 142 Community Heating Heat source Heat source Boilers Fue Heat from boilers mains gas Heat fraction 1 Effidency 30 Cancel Figure 23 8
189. stics Data File The Products Characteristics Database PCD contains performance data for gas oil and solid fuel boilers heat pumps mechanical ventilation systems and some renewable tech nologies section 28 4 The database is maintained by the BRE and 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 a month old the software prompts you to download the latest version You can prompt a check of the PCDF on the File menu click Download and re load Product Characteristics Data File Product Characteristics Data File Download e http www boilers org uk data i pcdf20 12 dat C ProgramData JPA VPA Designer pcdf20 12 dat Start update I ean Open destination folder Go to boiler database website Figure 24 3 Updating the PCDF The procedure for updating the PCDF is the same for automatic or manual checks CHAPTER 24 PRIMARY HEATING 147 1 In the Product Characteristics Data File Download dialogue click Start update JPA Designer downloads the latest data files for SAP 9 90 and SAP 9 92 and displays an Update complete message 2 Click OK 3 At the information dialogue which asks Would you like to load the new database click Yes JPA Designer loads the new data file 4 Click Close to finish the process The data in
190. struction for that environ ment To carry out condensation risk analysis 1 Define the element in the same way as you would for a thermal calculation tion 15 1 2 Set the environmental conditions section 15 2 3 View the results chapter 16 15 1 Defining the construction To carry out condensation risk analysis you must set the thermal resistance and vapour resistance of each layer which makes up the element using the appropriate methods for each type of layer e Normal materials Enter the thickness thermal conductivity and vapour resistivity JPA Designer will calculate the thermal resistance and the vapour resistance The module can not carry out condensation risk analysis for ground floors basements nor construc tions containing variable layers neither will it calculate the risk of surface condensation 82 CHAPTER 15 CONDENSATION RISK ANALYSIS IN JPA DESIGNER 83 e Composite materials Enter the thermal resistance and vapour resistance Although the thickness is not required for the calculation setting the thickness ensures the Dewpoint graph Figure 16 2 looks right e Fixed vapour resistance materials These are designed to be used in condensation risk analysis to represent materials such as metals which have very high resistances even when used in thin layers Enter the thickness thermal conductivity and the vapour resistance e Membranes Enter the vapour resistance e Cavities Enter the thermal resi
191. sulated between joists 56 000 0 130 T 20 T 20 walls 156 000 0 150 29 640 29 640 135 00 21060 00 2 Ground floors 50 000 0 160 8 000 6 000 20 00 1000 00 3 Party wall 23 000 0 000 0 000 0 000 O 00 1610 00 Figure 21 1 The Walls Roofs and Floors tab Table 21 1 U values for party walls Party wall construction U value W m kK Solid 0 0 Unfilled cavity with no effective edge sealing 0 5 Unfilled cavity with effective edge sealing 0 2 A fully filled cavity with effective sealing 0 0 CHAPTER 21 WALLS ROOFS AND FLOORS 119 Table 21 2 U values for building elements Element Exposed element Semi exposed U value Notes As calculated As calculated Ru adjustment to U value Party wall between dwellings From Party wall similar heating pattern 0 00 W m K Party wall different heating pattern Half calculated value Party floor similar heating pattern 0 00 W m K Party floor different heating pattern Half calculated value Party ceiling similar heating pattern 0 00 W m K Party ceiling different heating pattern Half calculated value Internal wall N A Take area of both sides Internal floor N A Internal ceiling N A The Element dialogue The Element Dialogue is used to enter data on each of the dwelling s opaque elements see Figure 21 2 it takes the following data e Element Use the drop down to set the type of element from the list The element type is used for checking average U val
192. t TIMSA logo You can always override the default setting in the Sections To Print dialogue Setting up identities The procedure for setting up identities is similar to that for setting address details 1 Enter the details for the first company as described in bection 18 5 2 Re open the Options dialogue 3 In the Identity list select the first blank identity usually labelled Blank 1 The Company name amp address and disclaimer information will be cleared 4 Enter the details for the second company including the data in Logo and signature tab Click OK to close the dialogue and save the data 5 Repeat steps 2 4 for any further identities As you add identities they will be added to the Identities list using the Name of the company in the list If you need to edit the data for any one of the identities select it from the Identities list make the changes and click OK When you come to create a PDF of a report or to print it you will be able to select one of the identities to use the associated details in the header Note that whichever identity you select when producing a report the report footer will always show the name of the company or individual holding the licence 3 Managing projects and calculations This chapter explains how JPA Designer stores calculations and describes how to work with project files and calculations It describes how to use calculation templates to speed up the calculation process 3 1 T
193. t retention storage heaters SAP 2012 has introduced a new category of high heat retention storage heaters which can be specified using the PCDF To specify high retention storage heaters 1 Set e Group to Storage radiator systems e Sub group to Off peak tariff e System to High heat retention storage heaters e Fuel to the appropriate tariff e Heating controls to Controls for high heat retention storage heaters 2 At Source of efficiency click Se ect from the product database 3 Click Select product The BRE Boilers Database dialogue opens 4 Select the manufacturer from the Brand list 5 Click on the model then click Add storage heater to list 6 In the quantity dialogue enter the number of that model of storage heaters 7 If there is another model of storage heater in the dwelling repeat steps 4 6 Note there cannot be more than five storage heaters in the dwelling 8 Click OK If you need to remove a storage heater from the calculation select it in the Selected storage heaters list then click Delete selected storage heater Warm air systems The heat for warm air systems is provided by gas oil electricity or heat pumps For most systems the only data required is that from the primary heating drop boxes If you are specifying a warm air system powered by a condensing gas heater or a heat pump it is possible to use efficiency data from the PCDF see for guidance on the procedure CHAPTER 24 PRIMARY HEATING 1
194. te 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 To change multiple U values This function enables you to revise the U values of several openings at once 1 Select the first of the openings by clicking on it once 2 Hold down the lt Shift gt key and click the last of the openings That opening and all the openings between the first and last are now selected CHAPTER 22 OPENINGS 129 Change Multipe U values Enter a new U value for all the selected Items Cancel Figure 22 2 Changing the U values of several openings at the same time 3 Click the Change U value of selected openings button The Change Multiple U values dialogue opens Figure 22 2 4 Enter the new U value then click OK The U values are changed You can also export the summary data for all openings to an Excel spreadsheet by clicking Send to Excel 22 1 Adding and editing openings The Doors Windows amp Rooflights dialogue Figure 22 3 is used to enter the data about the openings within the dwelling 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 e Opening within Use the drop down to select the element wall roof which c
195. te the calculation This section identifies the additional data required 34 1 Dwelling dimensions For England and for Wales the only additional data required in the Dimensions tab is the fraction of low energy lighting Enter the total number of lamps and the number of low energy lamps Lighting conventions are described in section 19 3 In addition for Scotland the number of dwellings above and below a flat or maisonette are also required These values are entered in the Number of dwellings above and Num ber of dwellings below boxes see section 19 5 34 2 Ventilation Most of the data in the Ventilation tab has to be entered in JPA Designer including e Pressure testing details e Ventilation strategy and where relevant e Ventilation efficiency data Ventilation data is described in chapter 20l 34 3 Walls roofs and floors There are three sets of data for the building fabric which are entered in the Walls roofs and floors tab e Flement areas and U values These are imported from VE The only time further data will be required is if the U value of an element has to be adjusted to take account of the effect of an adjoining unheated space This can be done using the procedure described in Eection 21 11 176 CHAPTER 34 COMPLETING THE CALCULATION 177 e Thermal mass data This is currently not exported from VE so has to be entered in JPA Designer The simplest method is to set the Thermal Mass Parameter to one of
196. ter details of a second bridge 1 A oy 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 1 Enter the Bridge width in mm The software uses the Non bridge width for the first bridge to calculate the Proportion bridged Non bridge width centre to centre distance bridge 1 bridge 2 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 and adjustments The rate of heat loss through an element can be affected by number of other conditions which can be addressed in the U value calculation by applying correction factors There are correction factors for e Mechanical fasteners which penetrate insulation dUf ection 8 1 e Air gaps in insulation layers dUg section 8 2 e The effect of rainwater cooling on inverted roofs dUr e Insulation compression in built up metal roofing and cladding dUp ection 9 2 The correction factors are calculated separately from therma
197. tered data the tick box will be greyed out and inaccessible This is to prevent the setting being changed halfway through a calculation and so avoid errors e Boiler comes under the exception procedure allowed in Part L item 12 The Domestic Building Services Compliance guide requires new or replace ment gas or oil boilers to have efficiency levels which can only be achieved by con densing appliances A non condensing boiler may be be permitted if the situation meets the conditions in the government s Condensing boiler installation assessment procedure for dwelling You may therefore only tick this box if the conditions of the assessment procedure are satisfied Once you have entered all the necessary data click OK gt Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings DCLG 2005 http www planningportal gov uk uploads br BR_PDF_PTL_CONDBOILER pdf CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 102 18 6 Entering information about the dwelling The data for the SAP calculation is entered using the SAP 9 92 2012 Worksheet Values dialogue The dialogue has a series of tabs each covering one part of the SAP input data Dwelling dimensions the basic configuration of the dwelling including the pro portion of low energy lighting chapter 19 Ventilation air infiltration rates ventilation strategy and system efficiency chap ter 20 Walls roofs and floors heat loss and thermal mass of the opaque build
198. the PCDF can be viewed at http www ncm pcdb org uk sap SEDBUK efficiencies One measure of boiler efficiency used in SAP is the SEDBUK rating Seasonal Efficiency of Domestic Boilers in the UK There was a change in the calculation method for SEDBUK efficiency ratings with the introduction of SAP 2009 which resulted in a general lowering of efficiencies Whilst JPA Designer allows you to enter either 2005 or 2009 SEDBUK ratings you should be ensure you do not enter a value compatible with the 2005 rating if you have selected the 2009 rating you may find you have entered a value which cannot be achieved by any boiler in the database 24 3 The main primary heating systems There are seven main groups of primary heating system the following sections describe how to enter data for the each group In all cases except community heating schemes start by using the drop boxes to set the e Group e Sub group e System e Fuel e Heating controls Always work from Group downwards as the options in the lower drop boxes change according to the selections made higher up Once you have set all the drop boxes you should enter any other requirements for that group then enter any additional data Note that none is not an acceptable heating option for a new dwelling CHAPTER 24 PRIMARY HEATING 148 Heating controls The heating controls for the primary heating system is set using the Heating controls list The control options listed will
199. the SAP 9 92 2012 Worksheet Values dialogue at different tabs The coloured status indicators below many of the toolbar buttons indicate the status of the data you have supplied for that part of the calculation e Red There is none or very little data in that section CHAPTER 18 THE JPA DESIGNER SAP 2012 MODULE 99 e Orange Most of the data is there but one or two items in that section are still missing e Green All the data necessary for completing the SAP calculation has been entered The indicators provide a quick way of seeing how far you have come in a calculation However you must remember the indicators refer only to the extent of data you have entered and have nothing to do with whether a dwelling will comply with regulations 18 5 Project information in SAP A SAP 2012 calculation requires general information about the project such as the name and address of the client the project address and basic information about the dwelling itself All this information is entered in the Project Information dialogue Figure 18 4 which is opened by selecting Edit gt Project Information from the menu bar Address details The client and project address details are shown on calculation worksheets and reports The location of the dwelling which affects some parts of the SAP calculation is set using the project address details The client name and address and the dwelling address should be typing into the appro priate fields
200. the dwelling Double glazing air gap Frame type BFRC g window value Overshading It does not change the Glazing U value or Orientation e Copy these values to all the buildings in this project using this button copies the same items to all other windows in all other dwellings in a project That allows you to define those items once but have the setting applied to multiple dwellings Also if you need to adjust the U values of several openings you can select the openings use the lt Shift gt key to make a multiple selection then click Change U value of selected openings to re set the U values 35 2 Building services Once you have set up the building services hot water primary and secondary heating for one dwelling you can return to the Project Manager window and copy those values to all the other dwellings 180 CHAPTER 35 EXPORTING SEVERAL DWELLINGS AT ONCE 181 1 In the Project Manager window click once on the dwelling which has its services configured 2 On the Edit menu click Copy non geometry details to all other 9 90 dwellings 3 At the confirm dialogue click OK 4 The building services data for that dwelling will be copied to all the other dwellings 36 Checking compliance Once you have entered all the data for the dwelling you can check its compliance status The program will display pass green or fail red in the compliance zone at the bottom right corner of the main SAP window If the dw
201. ti point gas water heater or heat exchange built into a gas warm air system e Boiler with thermal store e Combined primary storage unit CPSU e MicroCHP or Heat pump Use this option for heat pump with data taken from the Product Characteristics Database section 24 2 For all other heat pumps use Hot water storage tank e Community heating scheme providing domestic hot water only 23 1 Hot water storage tank Select this system for the hot water which is heated by the central heating boiler or immer sion coil then stored in a tank or cylinder ready for use Figure 23 1 Enter the following data for the tank e Hot water tank volume select one of the default values or enter the actual volume in the Volume drop down e Storage tank insulation use the radio buttons to select the type of insulation then enter its Thickness in mm e Declared loss factor Use the box to enter a heat loss factor supplied by the tank manufacturer instead of relying on the default values in SAP 2012 The means of heating the hot water must be specified using the Hot water tank heater radio buttons e Single electric immersion heater a single coil electric immersion heater in the tank e Dual electric immersion heater a dual coil electric immersion heater in the tank this will usually be associated with an off peak tariff in which case tick Off peak electricity immersion heaters e Boiler feed this indicates a heat source which also provide
202. tinctive names Enter the bridging details for the layer of insulation bridged by the rails for details In the Edit Materials dialogue select one dimensional bridging to show the thermal bridging details Enter the details of the rails bridge material steel studs bridge width non bridge width The software sets the bridge thermal con ductivity The program will show the proportion bridged and the thermal resistance of the bridge For L shaped sections the bridge width will usually be the thickness of the steel but for C and U sections where the rail penetrates the insulation layer twice use double the thickness of the steel as the bridge width Enter the bridge details for the air spaces caused by the rail Tick the Second bridge box The Optional second bridge section is displayed Enter the bridge material air and bridge width in mm use twice the rail width to allow for the compression of the insulation around the rails The program calculates the proportion bridged using the data from the first bridge so the non bridged width Centre to centre distance of rails bridge thickness 1 bridge thickness 2 To calculate the thermal resistance of the air space click the Small airspace resis tance button The Airspace Resistance Calculator dialogue opens see Figure 7 4 Enter the thickness and width of the air space The thickness will be the same as the rail depth The width should
203. tion for the notional dwelling e DER worksheet the worksheet for the DER calculation for the actual dwelling e FEE worksheet the worksheet for the FFE calculation for the dwelling e Standard case the SAP worksheet for the CSH Ene7 standard case e TER FEE the worksheet for the notional dwelling fabric energy efficiency e Heat demand worksheet for the calculation of space and water heating energy demand e EPC costs worksheet for the calculation of EPC costs emissions and primary en ergy e Input data a reflection of the information you have entered into the software e Regulations checklist shows the compliance status of the dwelling in a checklist which follows the criteria in AD L1A e Summer overheating results of the overheating assessment e Energy performance certificate EPC a draft energy performance certificate CHAPTER 29 COMPLIANCE AND REPORTS 166 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 for off plan sales e Assessment of Zero Carbon Home a calculation of the total emissions from a dwelling including emissions associated with appliances e Code for Sustainable Homes a calculation of items Enel Ene2 and Ene7 e Htb values calculation of linear thermal bridging for the dwelling To create a PDF file of the results 1 From the men
204. tions from the menu bar The Options dialogue opens 2 In the General tab enter your company name address phone and email details in the Company name amp address section see Figure 2 5 www techlit co uk gt If you are using a version earlier than 5 02a3 you will have to uninstall the program using the Windows Add remove prog rams or Uninstall programs control panel ali zi have the company logo ina different format such as a jpeg tiff or png you can use the free Paint program which comes with most versions of MS Windows to convert it to the right format and to set the correct colour depth CHAPTER 2 GETTING STARTED 11 Options Sa Identity First company name T General Logo amp Signature Email Other Printer margins mrm Eompant naime address Top page 1 30 Left 15 Name First company name Top page 2 Right E Address Bright Street Bottom Happy Town Options AB 2CD Print Logo Address m Print in colour Piee Print U value watermark Print SAF watermark Fax Print U value disclaimer Print SAP disclaimer emal Figure 2 5 The Options dialogue General tab 3 Tick the Print Logo amp Address box 4 Enter the wording of any disclaimers which you want to appear at the bottom of U value and SAP reports in the U value disclaimer and SAP boxes 5 If you have entered wording for the U value and or SAP disclaimers tick the Print U value disclaimer and or the Print SAP d
205. u bar select File gt Create PDF A dialogue asks if you want to open the PDF when it is created 2 Select Yes or No The Sections To Print dialogue opens Figure 29 1 3 Use the tick boxes to select the outputs you want to produce 4 Click OK The Print preview window opens 5 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 The program will then create a PDF file of the calculation The name of the PDF file will include the JPA Designer file name and the calcu lation name so the calculation Plot 28 in a project The Meadows will be called The Meadows JDPtile hung wall Plot 28 PDF The file will be saved into the JPA Designer program folder or in the start up folder you have specitied 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 char acters otherwise PDF creation will fail The restricted characters are gt To print the results 1 Select File gt Print from the menu bar or click the Print button on the tool bar The Sections To Print dialogue opens Figure 29 1 2 Use the tick boxes to select the outputs you want to produce 3 Click OK The Print preview window opens 4 Use the buttons on the tool bar to view successive pages of the print out then click the Print button to print the pages Figure 12 2 You can
206. ua i cot insert View Options nep EF DaT Lai ELERT a i condensation risk Normal wall wal sd i fe Layer p hemal Thermal f ae Seale aes a 0 040 T I i FF T ac m E S li k X 4 Blockwork medium 1 5 Plaster lightweic AA KX JPA Designer SAP 9 92 module U value modules amp Condensation Risk Version 6 02a1 and above T ISSUE FEBRUARY 2015 E AR D JPA TL Ltd ns S t Newcastle Business Village TR he 33 Bellingham Drive PEN Ki North Tyneside Ind Est wa ge ap T Newcastle upon Tyne veces ee 4 wots gf ff x T0191 270 5138 Se N co uk W www t chlit co uk a 4 cai said mi WA a j b st pA N E y sA ev AJ 4 u 2 REE amp v n i 7 A y i wR mi i Contents JPA Designer basic 1 Introducing JPA Designe 1 1 Conventions for the manual 1 2 Getting help Getting started 1 System requirement 2 JpPsaNaAON 6 oa ae oe ee Be RBA eee ee Ge eo ee 3 User registration seo 6s eee oe ewe en Oh ee ee A On line licence checking 6 Opening and closing JPA Designe 7 _ Uninstalling JPA Designen 2 2 ee ee 8 Adding your company details to report bb bbb bbb bbe nes ee bbb bes a L eres ee U W N O O WA DD UI UI gi No oi ONN DD UW W W Ww NO RO RO KR RO Go UW wat
207. ue Light transmittance is determined by Area ri 1 44 BFRC data 0 72 glazing type single double or triple so Manufacturer make sure you select the corect glazing Description w13 Opening Onentation OUTER sea width mm 1200 Height mm 1200 Front Left front Overhang used for Sse Right front overheating assessment Wwdth mm 1200 Depth mm U Blinds curtains amp external shutters Left Right mrm Fraction of daylight 0 00 tr cled Overshading Leftback Right back Heavy gt 30 sky blocked More than average 60 80 sky blocked NorthWest a Back Average or unknown 20 60 sky blocked Unepecitied Very httle lt 20 4 sky blocked x Cancel Figure 22 3 The Edit Doors Windows amp Rooflights dialogue e Frame type Use the radio buttons to select the frame material and for metal frames the depth of the thermal break e Source of U value there are three configurations for the U value and g window values Default the software will use the built in values for the U value and solar transmittance based on the glazing double glazing air gap and frame type selection Manufacturer you should enter a U value for the opening but the solar trans mittance will be based on the glazing and frame type BFRC data you should enter a U value and solar factor g window value The g window value must be certified by the British Fenestration Rating Council e U value If source of U value i
208. ues so it is important to set the right element type e Curtain wall Tick this box if the wall element consists of curtain walling Curtain walling has to be treated differently from normal walls in order to obtain the correct values for heat loss and solar gains The area of wall should be entered as normal but the U value set to that of the whole curtain wall system The window area should also be that of the whole facade with the same U value e Construction the drop down lists a number of common constructions for the spec ified element type and offers a quick way of setting the heat capacity for the ele ment Alternatively you can leave the construction blank and enter the heat ca pacity directly e Party wall type this drop down is only displayed if the Element is a party wall For a party wall between two dwellings select the appropriate construction that will also set the U value For a party wall between a dwelling and an occupancy which is not a dwelling ignore this box e Storey this box is only displayed if the Element is a party floor or internal floor Set the storey number relative to the building not just the dwelling The storey number is the floor number plus one for example first floor is storey 2 e When Element is set to internal floors the program displays the Ceiling below drop down select the internal ceiling which forms the other part of the internal floor construction CHAPTER 21 WALL
209. uses using an assumed value e Allow the software to calculate the infiltration rate from the construction type and building size This final method is not valid for demonstrating compliance under building regula tions Pressure test data Where air infiltration is being measured by pressure testing the initial SAP calculation uses a design air permeability value which is replaced by a final assessed permeability value once the dwelling has been completed To enter design stage air permeability 1 At Source of q50 value select Pressure test 2 Enter the air permeability in the Design q50 box 3 Set the radio buttons to as designed 4 Tick This dwelling has been pressure tested The pressure testing regime set out in Approved Document L1A requires a proportion of dwellings on any site to be pressure tested The assessed air permeability used in the as built SAP calculation depends on whether or not the dwelling in question has been tested itself e dwellings which have been tested the assessed air permeability is the result from testing e dwellings which have not been tested the assessed air permeability is the average results for that dwelling type increased by two To enter as built air pressure test data for a tested dwelling 1 Enter the measured air permeability in the Design q50 box 2 Set the radio buttons to as designed There are similar but not identical requirements in place for Wales and for Scotland
210. ve input ventilation from the loft No additional data e For centralised mechanical extract ventilation MEV The Specific Fan Power SFP whether the ducting is rigid or flexible CHAPTER 20 VENTILATION 114 e For decentralised mechanical whole house extract ventilation Figure 20 4 The Specific Fan Power SFP and number of fans differentiating between fans in the kitchen and other wet rooms and between in room in duct and through wall fans Using the Product Characteristics Data File Mechanical Ventilation Databe Manufacturer Greenwood Greenwood Air Management Ltd Greenwood House Brookside Avenue Database date 29 10 2010 Rustington Database revision 302 West Sussex ah l 3LH Available iri Ref Manufacturer id Manufacturer 500138 20004 Greenwood Air Ltd Greenwood Fusion HRV2 2009 current 500052 20004 Greenwood Air Management Ltd Greenwood HRV95 2007 current 500005 20004 Greenwood Air Management Greenwood MVHR SOR current 4 C Insulated duct Balanced or mechanical whole house ventilation Wet rooms excluding kitchen J Use the selected system Cancel eee E E O Figure 20 5 The Mechanical Ventilation Database dialogue To select value from the database 1 Select Database at Source of mechanical ventilation parameters 2 Click Lookup 3 In the Mechanical Ventilation Database dialogue Figure 20 5 select the Manufac turer The list of available products appears
211. w So before you save a template file you should change the project name to something which will help you identify the calculations from the list Figure 3 3 8 To set the project name The default A Blank Project will be no help at all a few weeks after you have created the template CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 20 Figure 3 8 Changing the project name 1 In the Project Manager window double click on the project name the default value is A blank project 2 In the Project Name dialogue type a new name for the project The template file must be saved in the same folder as the other JPA Designer user data files and in the JTF format To save a project as a template 1 On the File menu click Save Project as Template 2 Enter a File name 3 Set the folder to the user data folder in Windows 7 c ProgramData JPA JPA Designer 4 Make sure Save as type is set to PA Designer U value Template JTF and click OK 5 Your template project is now included in the Categories list 3 9 Opening and closing calculations To open a calculation from the Project Manager window either e double click on the calculation name or e click once on the calculation name then from the menu bar select Edit gt Selected item To close a calculation and return to the Project manager window click the Project man ager button on the tool bar CHAPTER 3 MANAGING PROJECTS AND CALCULATIONS 21 3 10 Duplicating calculati
212. w blank layer is added to the calculation above the existing layer 3 Double click on the layer to open it for editing CHAPTER 6 WORKING WITH LAYERS 34 6 3 Managing layers Once you have added layers to your calculation you change their order cut copy and paste them or delete them e Moving a layer Click and hold the right hand mouse button on the layer number at the left hand side of the window Drag the layer to a new position Release the mouse button e Cutting a layer removes a layer from the calculation but keeps it available on the clipboard Click on the layer to select it Click the Cut button on the toolbar The layer is deleted from the calculation but remains on the clipboard for pasting e Copying a layer puts a copy of the layer on the clipboard Click on the layer to select it Click the Copy button on the toolbar The layer remains in place but is copied to the clipboard e Pasting a layer places the layer on the clipboard into the calculation Click on the layer which you want to be below the pasted layer Click the Paste button on the tool bar The layer on the clipboard is placed in the calculation above the selected layer e Deleting a layer removes a layer permanently from the calculation Click on the layer to select it Click lt Delete gt Working with materials The properties of layers are entered and edited in the Edit Material
213. wet central heating systems with radiators underfloor pipes or fan coil units with the heat can be provided by gas oil solid fuel or electric boilers heat pumps or microCHP units To specify such systems set e the Group Sub group System Fuel Heating controls and Electricity tariff e the Heat emitters To combine underfloor heating on the ground floor with radiators on the first floor set the Heat emitters to one of the underfloor options and tick Underfloor heating also has radiators the efficiency of the boiler section 24 3 additional items such as heating controls see section 24 3 and is the central heating pump in a heated space is the central heating pump manufactured in 2013 or later Always tick the box for a new dwelling for an oil fired boiler is the oil pump in the heated space is there a boiler interlock That is the system is installed so the boiler will not fire when there is no demand for heat CHAPTER 24 PRIMARY HEATING 149 Boiler efficiency The efficiency of the boiler or other heat source can be entered in one of three ways BRE Boilers Database ssa S a ii a lem Brand Database date 18 12 2014 Database revision 372 Table 105 210 Available boilers heat pumps Ref Manufacturer id Manufacturer Brand Baxi Potterton Baxi Potterton Baxi Bermuda Inset 3 50 5 GC No 444075 07 3 Baxi Potterton Baxi Potterton Baxi Bermuda Inset 2 50 4E 4075 03 73 4 Baxi Potterto
214. ype 2 In the Element type section select Flat roof 3 Tick the Inverted roof box 4 In the External insulation layers box tick the layer s is affected by the rainwater cooling Where a low U value is required there may be more than one insulation layer affected 1 Enter values for f x and p Click OK If you do not have project specific values you can use the default values for f x and p 8 4 Rainscreen cladding When calculating U values for walls which include rainscreen cladding the results have to be adjusted to account for the effect of fixing brackets which support the cladding and in doing so 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 Vall Basement Flo J Rainscreen cladding Basement We x 0 020 n 2 770 Figure 8 7 Data for rainscreen cladding correction To correct for brackets in rainscreen cladding 1 From the menu bar select Edit gt Construction Type 2 In Element type select Wall 3 Tick the Rainscreen cladding box 4 Enter values for x and n see Figure 8 7 If you do not have project specific values you can

JPA Designer User Manual 6.02 - for U

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