Scope SCOPE & METHOD This spreadsheet specifies methods for calculating the design heat loss and the design heat load for basic cases at the design conditions. Basic cases comprise all buildings: - with a limited room height (not exceeding 5 m); - assumed to be heated to steady state conditions under the design conditions. Examples of such buildings are: residential buildings; office and administration buildings; schools; libraries; hospitals; recreational buildings; prisons; buildings used in the catering trade; department stores and other buildings used for business purposes; industrial buildings. Additional information is also given for dealing with the following special cases: - high ceiling buildings or large enclosure; - buildings where air temperature and mean radiant temperature differ significantly. This calculation uses the simplified methodology of BS EN 12831 and so this applies to new build properties with high quality seale For ordinary double glazed windows and doors, a full BS EN 12831 calculation is required. This can be achieved through the “pre-2 This calculation is not based on the information in the national annex of BS EN 12831. Where relevant, information is take As new build has bathroom temperatures as the rest of the house, use toilet temperature for internal bathroom temperature. Use external dimensions for the property i.e. measure to the far reach of external walls and the middle of internal walls. Also measure from the ground floor surface to the surface of the above floor Page 1 Scope Page 2 Scope d the design heat load for basic tion buildings; schools; ering trade; department his applies to new build properties with high quality sealed windows and doors. tion is required. This can be achieved through the “pre-2000” spreadsheet. of BS EN 12831. Where relevant, information is taken from CIBSE Guide A et temperature for internal bathroom temperature. xternal walls and the middle of internal walls. Page 3 Scope Page 4 Temperature and Ventilation Rates Internal Room Ventilation Temp * (°C) Change Rate Living room 21 0.5 Dining room 21 0.5 Bedsitting room 21 0.5 Bedroom 21 0.5 Hall and landing 21 0.5 Kitchen 21 1.5 Toilet/bathroom 21 1.5 Office room 21 1.0 Meeting room 21 2.0 Adjacent Room use factors N/A * Int design temps (°C) & vent change rates from BS EN 12831 (not from National Annex) Except 21 °C internal temp throughout (instead of 20 °C & 24 °C bathroom) Outside design temperatures for different locations in the UK External Location Alt (m) Temp ** (°C) *** & **** Belfast -1.2 68 Birmingham -3.4 96 Cardiff -1.6 67 Edinburgh -3.4 35 Glasgow -3.9 5 London -1.8 25 Manchester -2.2 75 Plymouth -0.2 27 ** Hourly dry-bulb temperature (°C) equal to or exceeded for 99% of the hours in a year *** Corrections can be applied to account for altitude and heat island effects. **** Absence more localised info: use closest location - 0.6 °C for every 100m above sea level Further information on data use is available in CIBSE Guide A: Environmental Design. Degree Day data from CIBSE Guide A (base temperature 15.5 °C) 1976-1995 & Mean Air Temp data (from MIS 3005 Appendix B) Degree Mean Air Day (K*day) Temp (°C) Thames Valley (Heathrow) 2033 11.3 South-eastern (Gatwick) 2255 10.2 Southern (Hurn) 2224 10.4 South-western (Plymouth) 1858 11.0 Severn Valley (Filton) Midland (Elmdon) W Pennines (Ringway) North-western (Carlisle) Borders (Boulmer) North-eastern (Lemming) E Pennines (Finningley) E Anglia (Honington) W Scotland (Abbotsinch) E Scotland (Leuchars) NE Scotland (Dyce) Wales (Aberporth) N Ireland (Aldergrove) NW Scotland (Stornoway) 1835 2425 2228 2388 2483 2370 2307 2254 2494 2577 2668 2161 2360 2671 10.6 9.8 10.0 9.4 9.0 9.4 10.0 10.1 9.1 8.8 8.5 9.9 9.4 8.6 Factors “piercing” building element = uninsulated thermal bridge “non piercing” building element = insulated thermal bridge Temperature correction factor, fk, for the simplified method fk Heat Loss: Comments directly to the exterior 1 if thermal bridges are insulated 1.4 if thermal bridges are not insulated 1 for windows, doors through unheated space 0.8 if thermal bridges are insulated 1.12 if thermal bridges are not insulated through the ground 0.3 if thermal bridges are insulated 0.42 if thermal bridges are not insulated through the roof space 0.9 if thermal bridges are insulated 1.26 if thermal bridges are not insulated suspended floor 0.9 if thermal bridges are insulated 1.26 if thermal bridges are not insulated to an adjacent building 0.5 if thermal bridges are insulated 0.7 if thermal bridges are not insulated to an adjacent building entity 0.3 if thermal bridges are insulated 0.42 if thermal bridges are not insulated Page 1 Factors Reheat factor, frh, for residential buildings, nightsetback maximum 8 hr frh, W/m2 frh, W/m2 frh, W/m2 Assumed internal temperature drop during setback * Reheat 1 °C 2 °C 3 °C time building mass building mass building mass hours high high high 1 11 22 45 2 6 11 22 3 4 9 16 4 2 7 13 Page 2 U-Values Conductivity of materials Material Description code 1 Light bricks 2 11 13 21 Concrete Gypsum Cement plastering Polystyrene λ W/m*K 0.8 1.75 0.35 1.15 0.043 0.042 0.037 0.023 0.041 0.7 0.23 0 0.15 0.12 Rsi or Rse M²*K/W 0.18 0.13 0.04 0.1 0.17 Building element code Codes Element Material Building element name Code Code … Code Code Total thickness and Uk 11” open cavity wall 61 11 1 41 1 62 Total thickness and Uk 11” filled cavity wall 61 11 1 41 1 62 Total thickness and Uk 15” filled cavity wall 61 11 1 41 1 62 Total thickness and Uk 23 Rock wool 24 Extruded polystyrene N/A PIR Foam (polyurethane) 25 Mineral fibre panel DIN 18165 31 Gravel 32 Bitumen 41 Unventilated air layer s=40 mm 51 Wood 53 Metal composite Surface resistances (between air and structures) Material Description code 41 Unventilated air layer s=40 mm 61 Int surface resistance (horizontal heat flow) 62 Ext surface resistance (horizontal heat flow) 63 Int surface resistance (heat flow upwards) 66 Int surface resistance (heat flow downwards) Table 6.1 Open Cav Brick 102 Brick 102 Plaster 13 1.37 Table 6.1 Filled Cav Brick 102 Brick 102 Plaster 13 0.56 Table 6.1 Filled Cav Brick 102 Brick 102 Plaster 13 0.56 Page 3 U-Values Description Building element name Internal laminar layer name Material name …. Material name d1 … dn λ1 … λn d m λ W/m*K R Uk m²*K/W W/m²*K Rsi R1= d1/λ1 … Rn = dn/λn Rse Σ R se 0.13 0.037 0.128 0.18 0.128 0.04 0.642 0.13 0.037 0.128 1.163 0.128 0.04 1.625 0.13 0.037 0.128 2.326 0.792 0.04 3.452 1/Σ R se External laminar layer name Total thickness and Uk Σ di 11” open cavity wall Int surface resistance (horizontal heat flow) Gypsum 0.013 0.35 Light Brick 0.102 0.8 Unventilated air layer 0.05 Light Brick 0.102 0.8 Ext surface resistance (horizontal heat flow) Total thickness and Uk 0.267 11” filled cavity wall Int surface resistance (horizontal heat flow) Gypsum 0.013 0.35 Light Brick 0.102 0.8 filled cavity wall 0.05 0.043 Light Brick 0.102 0.8 Ext surface resistance (horizontal heat flow) Total thickness and Uk 0.267 15” filled cavity wall Int surface resistance (horizontal heat flow) Gypsum 0.013 0.35 Light Brick 0.102 0.8 filled cavity wall 0.1 0.043 high performance aerated block 0.19 0.24 Ext surface resistance (horizontal heat flow) Total thickness and Uk 0.405 1.56 0.62 0.29 Page 4 ADDRESS Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Kitchen Diner FABRIC HEAT LOSS FLOOR 4.9 2.7 0.3 EXT WALL (gross area) 7.6 2.4 WINDOW GLAZING 1.1 1.05 1 1.6 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 2.1 1.75 1 1.6 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 0 0 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0 22.8 PARTY WALL 2.7 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 frh DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 4.9 2.7 11 13.23 TOTAL ROOM HEAT LOSS Kitch-Diner 1 House, A Street, Newtown County, SW1 1XX 21 Degree fk, Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length mWidth m Height m p.u. 1.5 4.9 2.7 2.4 JOB GEOG. Amount air heated per hour m3/hour 47.63 Area m2 13.23 18.24 1.16 0.00 3.68 13.41 0.00 0.00 0.00 0.00 6.48 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0.24 22.8 Page 1 Kitch-Diner 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 369 593 72 42 0 134 89 0 0 0 30 0 736 0 146 882 35 Table 6.9 (100 mm) 68 Table 6.8 (triple, low-E, argon) 0 215 Table 6.8 (triple, low-E, argon) 142 see U-values (15” filled cavity wall) 0 0 0 U-Value = Part L max 0 1053 0 1053 Page 2 Living A ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 2.76 4.45 2.4 JOB GEOG. Amount air heated per hour m3/hour 14.74 Area m2 12.28 6.62 2.10 0.00 0.00 4.52 0.00 0.00 0.00 0.00 10.68 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0.19 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Living Room A FABRIC HEAT LOSS FLOOR 2.76 4.45 0.3 EXT WALL (gross area) 2.76 2.4 WINDOW GLAZING 2 1.05 1 1.6 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 0 0 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0 22.8 PARTY WALL 4.45 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 2.76 4.45 11 12.28 TOTAL ROOM HEAT LOSS Page 1 Living A 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 114 184 53 77 0 0 30 0 0 0 49 0 323 0 135 458 26 Table 6.11 (100 mm) 123 Table 6.8 (triple, low-E, argon) 0 0 48 see U-values (15” filled cavity wall) 0 0 0 U-Value = Part L max 0 380 0 380 Page 2 Living B ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 0.9 2.72 2.4 JOB GEOG. Amount air heated per hour m3/hour 2.94 Area m2 2.45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0.15 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Living Room B FABRIC HEAT LOSS FLOOR 0.9 2.72 0.3 EXT WALL (gross area) 0 2.4 WINDOW GLAZING 0 0 1 0 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 0 0 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0 22.8 PARTY WALL 0 2.4 0.3 0 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 0.9 2.72 11 2.45 TOTAL ROOM HEAT LOSS Page 3 Living B 2 Bed End Terrace Power Energy Heat Loss Heat Loss Difference Watts kWh 23 37 8 0 0 0 0 0 0 0 0 0 31 0 27 58 U-Value Taken from & Notes BS EN 12831 4 Table 6.11 (100 mm); (used 7-10 m) 0 0 0 0 see U-values (15” filled cavity wall) 0 0 0 0 41 0 41 Page 4 Hall A ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 2.14 1.73 2.4 JOB GEOG. Amount air heated per hour m3/hour 4.44 Area m2 3.70 9.29 0.00 0.00 1.56 7.73 0.00 0.00 0.00 0.00 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0.26 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Hall A FABRIC HEAT LOSS FLOOR 2.14 1.73 0.3 EXT WALL (gross area) 3.87 2.4 WINDOW GLAZING 0 0 1 0 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0.8 1.95 1 1.6 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 0 0 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 2.14 1.73 11 3.70 TOTAL ROOM HEAT LOSS Page 5 Hall A 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 34 55 22 0 0 57 51 0 0 0 0 0 164 0 41 205 11 Table 6.9 (100 mm) 0 0 91 Table 6.8 (triple, low-E, argon) 82 see U-values (15” filled cavity wall) 0 0 0 0 239 0 239 Page 6 Hall B ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 1.24 2.72 2.4 JOB GEOG. Amount air heated per hour m3/hour 4.05 Area m2 3.37 6.53 0.00 0.00 0.00 6.53 0.00 0.00 0.00 0.00 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0.25 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Hall B FABRIC HEAT LOSS FLOOR 1.24 2.72 0.3 EXT WALL (gross area) 2.72 2.4 WINDOW GLAZING 0 0 1 0 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 0 0 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 1.24 2.72 11 3.37 TOTAL ROOM HEAT LOSS Page 7 Hall B 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 31 50 19 0 0 0 43 0 0 0 0 0 94 0 37 131 9 Table 6.11 (100 mm) 0 0 0 69 see U-values (15” filled cavity wall) 0 0 0 0 129 0 129 Page 8 ADDRESS Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Bedroom 1A FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 3.66 2.4 WINDOW GLAZING 1.1 1.05 1 0.16 22.8 WINDOW GLAZING 1.1 1.05 1 0.16 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 3.66 3.66 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 3.66 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 3.66 3.66 11 13.40 TOTAL ROOM HEAT LOSS Bed 1A 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length mWidth m Height m p.u. 0.5 3.66 3.66 2.4 JOB GEOG. Amount air heated per hour m3/hour 16.07 Area m2 0.00 8.78 1.16 1.16 0.00 6.47 13.40 0.00 0.00 13.40 8.78 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Page 9 Bed 1A 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 125 200 0 4 4 0 43 0 0 37 40 0 253 0 147 400 0 7 Table 6.8 (triple, low-E, argon) 7 Table 6.8 (triple, low-E, argon) 0 69 see U-values (15” filled cavity wall) 0 0 53 Table 6.7 (300 mm) U-Value = Part L max 0 335 0 335 Page 10 Bed 1B ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 1.24 1.73 2.4 JOB GEOG. Amount air heated per hour m3/hour 2.57 Area m2 0.00 7.13 0.00 0.00 0.00 7.13 2.15 0.00 0.00 2.15 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Bedroom 1B FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 2.97 2.4 WINDOW GLAZING 0 0 1 0 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 1.24 1.73 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 1.24 1.73 11 2.15 TOTAL ROOM HEAT LOSS Page 11 Bed 1B 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 20 32 0 0 0 0 47 0 0 6 0 0 73 0 24 97 0 0 0 0 76 see U-values (15” filled cavity wall) 0 0 8 Table 6.7 (300 mm) U-Value = Part L max 0 116 0 116 Page 12 Bed 2 ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 2.57 3.49 2.4 JOB GEOG. Amount air heated per hour m3/hour 10.76 Area m2 0.00 6.17 1.16 0.00 0.00 5.01 8.97 0.00 0.00 8.97 8.38 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Bedroom 2 FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 2.57 2.4 WINDOW GLAZING 1.1 1.05 1 0.16 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 2.57 3.49 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 3.49 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 2.57 3.49 11 8.97 TOTAL ROOM HEAT LOSS Page 1 Bed 2 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 83 134 0 4 0 0 33 0 0 25 38 0 184 0 99 282 0 7 Table 6.8 (triple, low-E, argon) 0 0 53 see U-values (15” filled cavity wall) 0 0 35 Table 6.7 (300 mm) U-Value = Part L max 0 230 0 230 Page 2 Bath ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 1.5 2.33 1.92 2.4 JOB GEOG. Amount air heated per hour m3/hour 16.10 Area m2 0.00 5.59 1.16 0.00 0.00 4.44 4.47 0.00 0.00 4.47 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Bedroom 1A FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 2.33 2.4 WINDOW GLAZING 1.1 1.05 1 0.16 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 2.33 1.92 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 2.33 1.92 11 4.47 TOTAL ROOM HEAT LOSS Page 3 Bath 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 125 201 0 4 0 0 29 0 0 12 0 0 171 0 49 220 0 7 Table 6.8 (triple, low-E, argon) 0 Table 6.8 (triple, low-E, argon) 0 47 see U-values (15” filled cavity wall) 0 0 18 Table 6.7 (300 mm) U-Value = Part L max 0 272 0 272 Page 4 Landing A ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 1.24 2.13 2.4 JOB GEOG. Amount air heated per hour m3/hour 3.17 Area m2 0.00 5.11 0.00 0.00 0.00 5.11 2.64 0.00 0.00 2.64 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Landing A FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 2.13 2.4 WINDOW GLAZING 0 0 1 0 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 1.24 2.13 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 1.24 2.13 11 2.64 TOTAL ROOM HEAT LOSS Page 5 Landing A 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 25 39 0 0 0 0 34 0 0 7 0 0 66 0 29 95 0 0 0 0 54 see U-values (15” filled cavity wall) 0 0 10 Table 6.7 (300 mm) U-Value = Part L max 0 104 0 104 Page 6 Landing B ADDRESS 1 House, A Street, Newtown County, SW1 1XX 21 Degree Temp -1.8 Days Correction 22.8 1526 Factor AC/hr Length m Width m Height m p.u. 0.5 2.33 1.57 2.4 JOB GEOG. Amount air heated per hour m3/hour 4.39 Area m2 0.00 3.77 0.20 0.00 0.00 3.57 3.66 0.00 0.00 3.66 0.00 0.00 2 Bed End Terrace London Air Design change Temp factor Difference W/m3K °C 0.34 22.8 U-Value 0 22.8 Design Room Temp Lower Design Temp Design Temp Diff VENT HEAT LOSS Bedroom 1A FABRIC HEAT LOSS FLOOR 0 0 0.3 EXT WALL (gross area) 1.57 2.4 WINDOW GLAZING Round Window 1 0.16 22.8 WINDOW GLAZING 0 0 1 0 22.8 DOOR 0 0 1 0 22.8 EXT WALL (net area) Subtract glazing & door from gross ext wall area 1 0.29 22.8 CEILING or ROOF (gross area) 2.33 1.57 ROOF GLAZING 0 0 1 0 22.8 ROOF GLAZING 0 0 1 0 22.8 CEILING or ROOF (net area) Subtract roof glazing from gross roof area 0.9 0.12 22.8 PARTY WALL 0 2.4 0.3 0.2 22.8 OTHER 0 2.4 0 0 22.8 DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements) EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSS INTERMITTENT HEAT 2.33 1.57 11 3.66 TOTAL ROOM HEAT LOSS Page 7 Landing B 2 Bed End Terrace Power Energy U-Value Heat Loss Heat Loss Taken from Difference & Notes Watts kWh 34 55 0 1 0 0 24 0 0 10 0 0 68 0 40 109 0 1 Table 6.8 (triple, low-E, argon) 0 0 38 see U-values (15” filled cavity wall) 0 0 14 Table 6.7 (300 mm) U-Value = Part L max 0 108 0 108 Page 8 ASHP Main Variables Table No of Bedrooms Flow temp in HW mode HP capacity in HW mode Flow temp in Space Heat mode HP capacity in Space Heat mode Marginal Electricity Cost Running mode for CH pump Power CH Pump Hot Water Energy Calculation No of occupants/bedroom Hot water / occupant η pipework loss HP to cyl Final HP secondary HW temperature HP SPF (at HW flow temp) HP HW electrical energy/day Immersion HW electrical energy/day Total HW electrical energy/day Estimated Running Costs Calculations SPF space heating FLEQ space heating FLEQ HW heating FLEQ total Electrical Energy HP space heating Electrical Energy HP HW heating Cost Space Heating Cost HW Heating from HP Cost HW heating from immersion Cost CH Pump Constants and Assumptions SHC Water J to kWh water mains input temp kg to litres water 35 Heating HW flow temp °C 40 Heating HW flow temp °C 45 Heating HW flow temp °C 50 Heating HW flow temp °C 55 Heating HW flow temp °C 60 Heating HW flow temp °C 65 Heating HW flow temp °C 2 50 4.24 45 4.38 12 FLEQ 105 rooms °C kW °C kW p/kWh (hrs) W Occupation level = No. bedrooms + 1 person from design choices from Manufacturer's data from design choices from Manufacturer's data electricity price without standing charge If not FLEQ, enter number of operational hours Default setting for speed 3 on 5m CH pump 1 45 70 45 2.7 2.91 2.36 5.26 persons litres/day % °C Increase this if house > 1 person/room (35 or 40 if steps taken to reduce HW consumption) eff of HW system. Set to 85% if tank-in-tank equals flow temp in HW mode – 5 °C kWh/day kWh/day kWh for HW/day 3 687 676 1363 1003 1061 £120.34 £127.35 £103.16 £17.17 hours hours hours kWh kWh 4187 3600000 10 1 3.6 3.4 3 2.7 2.4 2.1 1.8 J/kgK °C SPF SPF SPF SPF SPF SPF SPF Page 9 ASHP Results Tables Power Required Table Space Heat Loss Power required for HW heating Total power from HP Energy Consumption Table Space Heat Consumption HW Consumption HP Total Energy Consumption HP HW Consumption Immersion Total Energy Consumption l = No. bedrooms + 1 person 2.94 kW 0.60 kW 3.54 kW Design Power for HP without standing charge er number of operational hours or speed 3 on 5m CH pump ouse > 1 person/room s taken to reduce HW consumption) m. Set to 85% if tank-in-tank 3008 2865 5874 860 6734 kWh kWh kWh kWh kWh Table 3 data Information for Householder estimated costs for central heating provision Cost Space Heating £120.34 Cost HW Heating from HP £127.35 Cost HW heating from immersion £103.16 Cost CH Pump £17.17 Cyl & Pipework Part L * Yes see below Best practice for HW implemented** Yes see below Bacteria pasteurisation implemented Yes Total estimated CH running cost £368.02 Electrical System Performance 2924 kWh * Cylinder and pipework must be insulated to Domestic Building Services Compliance Guide. Change to Section 6 for Scotland & Part F for NI ** HW store size matched to property and use of instantaneous points of use matched to store size. *** Electrical system performance is section 4.3 Page 10 GSHP Main Variables Table No of Bedrooms Flow temp in HW mode HP capacity in HW mode Flow temp in Space Heat mode HP capacity in Space Heat mode Marginal Electricity Cost Running mode for CH pump Power CH Pump Power Ground HX pump Hot Water Energy Calculation No of occupants/bedroom Hot water / occupant η pipework loss HP to cyl Final HP secondary HW temperature HP SPF (at HW flow temp) HP HW electrical energy/day Immersion HW electrical energy/day Total HW electrical energy/day Estimated Running Costs Calculations SPF space heating FLEQ space heating FLEQ HW heating FLEQ total Electrical Energy HP space heating Electrical Energy HP HW heating Cost Space Heating Cost HW Heating from HP Cost HW heating from immersion Cost CH Pump Cost Ground HX pump Constants and Assumptions SHC Water J to kWh water mains input temp kg to litres water 35 Heating HW flow temp °C 40 Heating HW flow temp °C 45 Heating HW flow temp °C 50 Heating HW flow temp °C 55 Heating HW flow temp °C 60 Heating HW flow temp °C 65 Heating HW flow temp °C 2 50 4.75 45 4.8 12 FLEQ 105 120 rooms °C kW °C kW p/kWh (hrs) W W Occupation level = No. bedrooms + 1 person from design choices from Manufacturer's data from design choices from Manufacturer's data electricity price without standing charge If not FLEQ, enter number of operational hours Default setting for speed 3 on 5m CH pump 2.5% or lower of space heating power 1 45 70 45 3.4 2.31 2.36 4.66 persons litres/day % °C Increase this if house > 1 person/room (35 or 40 if steps taken to reduce HW consumption) eff of HW system. Set to 85% if tank-in-tank equals flow temp in HW mode – 5 °C kWh/day kWh/day kWh for HW/day 3.7 627 603 1230 813 843 £97.57 £101.13 £103.16 £15.50 £17.71 hours hours hours kWh kWh 4187 3600000 10 1 4.3 4.1 3.7 3.4 3.1 2.8 2.5 J/kgK °C SPF SPF SPF SPF SPF SPF SPF Page 11 GSHP Results Tables Power Required Table Space Heat Loss Power required for HW heating Total power from HP Energy Consumption Table Space Heat Consumption HW Consumption HP Total Energy Consumption HP HW Consumption Immersion Total Energy Consumption el = No. bedrooms + 1 person 2.94 kW 0.60 kW 3.54 kW Design Power for HP without standing charge er number of operational hours or speed 3 on 5m CH pump f space heating power 3008 2865 5874 860 6734 kWh kWh kWh kWh kWh Table 3 data house > 1 person/room s taken to reduce HW consumption) m. Set to 85% if tank-in-tank Information for Householder estimated costs for central heating provision Cost Space Heating £97.57 Cost HW Heating from HP £101.13 Cost HW heating from immersion £103.16 Cost CH Pump £15.50 Cyl & Pipework Part L * Yes see below Best practice for HW implemented** Yes see below Bacteria pasteurisation implemented Yes Antifreeze to -10 °C Yes Biocide to Spec in Antifreeze Yes Antifreeze checked 2 samples Yes Total estimated CH running cost £317.36 Electrical System Performance 2516 kWh * Cylinder and pipework must be insulated to Domestic Building Services Compliance Guide. Change to Section 6 for Scotland & Part F for NI ** HW store size matched to property and use of instantaneous points of use matched to store size. *** Electrical system performance is section 4.3 Page 12 12 14 15.5 Glasgow Jan Feb Mar 12 248 217 195 14 309 274 256 15.5 357 317 303 Apr May 142 73 198 118 242 159 June July Aug Sept Oct 32 11 15 39 96 64 30 35 75 148 97 54 61 108 192 Nov 172 230 276 Dec 236 297 342 1476 2034 2508 Heathrow 12 207 192 151 101 37 8 1 2 14 267 247 208 150 72 24 6 8 15.5 314 290 255 192 105 45 16 18 11 46 130 187 28 86 184 246 51 124 228 293 1073 1526 1931 Page 13 AMENDMENTS ISSUED SINCE PUBLICATION Document Number: 1 Amendment Details: Original draft version for comment. 1.1 Corrections to formula errors on ASHP and GSHP pages. Date: 4/1/2012 4/20/2012
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Report "New Build House Using BS en 12831 Simplified Method v 1 1"