new build house using bs en 12831 simplified method v 1 1

Scope

SCOPE & METHOD

This spreadsheet specifies methods for calculating the design heat loss and the design heat load for basiccases 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; departmentstores 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 sealed windows and doors.For ordinary double glazed windows and doors, a full BS EN 12831 calculation is required. This can be achieved through the “pre-2000” spreadsheet.This calculation is not based on the information in the national annex of BS EN 12831. Where relevant, information is taken from CIBSE Guide A

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

Scope

This spreadsheet specifies methods for calculating the design heat loss and the design heat load for basic

Examples of such buildings are: residential buildings; office and administration buildings; schools;libraries; hospitals; recreational buildings; prisons; buildings used in the catering trade; department

This calculation uses the simplified methodology of BS EN 12831 and so this applies to new build properties with high quality sealed windows and doors.For ordinary double glazed windows and doors, a full BS EN 12831 calculation is required. This can be achieved through the “pre-2000” spreadsheet.This calculation is not based on the information in the national annex of BS EN 12831. Where relevant, information is taken from CIBSE Guide A

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.

Temperature and Ventilation Rates

Room Internal VentilationTemp * (°C) Change Rate

Living room 21 0.5Dining room 21 0.5Bedsitting room 21 0.5Bedroom 21 0.5Hall and landing 21 0.5Kitchen 21 1.5Toilet/bathroom 21 1.5Office room 21 1.0Meeting room 21 2.0Adjacent 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

Location External Alt (m)Temp ** (°C) *** & ****

Belfast -1.2 68Birmingham -3.4 96Cardiff -1.6 67Edinburgh -3.4 35Glasgow -3.9 5London -1.8 25Manchester -2.2 75Plymouth -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 levelFurther information on data use is available in CIBSE Guide A: Environmental Design.

Degree Mean Air Day (K*day) Temp (°C)

Thames Valley (Heathrow) 2033 11.3South-eastern (Gatwick) 2255 10.2Southern (Hurn) 2224 10.4South-western (Plymouth) 1858 11.0

Severn Valley (Filton) 1835 10.6Midland (Elmdon) 2425 9.8W Pennines (Ringway) 2228 10.0North-western (Carlisle) 2388 9.4

Borders (Boulmer) 2483 9.0North-eastern (Lemming) 2370 9.4E Pennines (Finningley) 2307 10.0E Anglia (Honington) 2254 10.1

W Scotland (Abbotsinch) 2494 9.1E Scotland (Leuchars) 2577 8.8NE Scotland (Dyce) 2668 8.5Wales (Aberporth) 2161 9.9

N Ireland (Aldergrove) 2360 9.4NW Scotland (Stornoway) 2671 8.6

Degree Day data from CIBSE Guide A (base temperature 15.5 °C) 1976-1995& Mean Air Temp data (from MIS 3005 Appendix B)

Factors

Page 1

“piercing” building element = uninsulated thermal bridge“non piercing” building element = insulated thermal bridge

Heat Loss: Commentsdirectly to the exterior 1 if thermal bridges are insulated

1.4 if thermal bridges are not insulated1 for windows, doors

through unheated space 0.8 if thermal bridges are insulated1.12 if thermal bridges are not insulated

through the ground 0.3 if thermal bridges are insulated0.42 if thermal bridges are not insulated

through the roof space 0.9 if thermal bridges are insulated1.26 if thermal bridges are not insulated

suspended floor 0.9 if thermal bridges are insulated1.26 if thermal bridges are not insulated

to an adjacent building 0.5 if thermal bridges are insulated0.7 if thermal bridges are not insulated

to an adjacent building entity 0.3 if thermal bridges are insulated0.42 if thermal bridges are not insulated

Temperature correction factor, fk, for the simplified methodfk

Factors

Page 2

Assumed internal temperature drop during setback *Reheat 1 °C 2 °C 3 °Ctime building mass building mass building masshours high high high

1 11 22 452 6 11 223 4 9 164 2 7 13

Reheat factor, frh, for residential buildings, nightsetback maximum 8 hrfrh, W/m2 frh, W/m2 frh, W/m2

U-Values

Page 3

Conductivity of materials CodesMaterial Description λ Element Material

code W/m*K Building element name

1 Light bricks 0.8 Code

2 Concrete 1.75 Building Code 11 Gypsum 0.35 element …

13 Cement plastering 1.15 code Code

21 Polystyrene 0.043 Code

23 Rock wool 0.04224 Extruded polystyrene 0.037 11” open cavity wallN/A PIR Foam (polyurethane) 0.023 Table 6.1 6125 Mineral fibre panel DIN 18165 0.041 Open Cav 1131 Gravel 0.7 Brick 102 132 Bitumen 0.23 Brick 102 4141 Unventilated air layer s=40 mm 0 Plaster 13 151 Wood 0.15 62

53 Metal composite 0.12 1.37Surface resistances (between air and structures) 11” filled cavity wall

Material Description Table 6.1 61code M²*K/W Filled Cav 11

41 Unventilated air layer s=40 mm 0.18 Brick 102 161 Int surface resistance (horizontal heat flow) 0.13 Brick 102 4162 Ext surface resistance (horizontal heat flow) 0.04 Plaster 13 163 Int surface resistance (heat flow upwards) 0.1 62

66 Int surface resistance (heat flow downwards) 0.17 0.5615” filled cavity wall

Table 6.1 61Filled Cav 11Brick 102 1Brick 102 41Plaster 13 1

62

0.56

Total thickness and Uk


Rsi or Rse



U-Values

Page 4

Description d λ Rm W/m*K m²*K/W W/m²*K

Building element name

Internal laminar layer name

Material name…. … … …

Material name

External laminar layer name

11” open cavity wallInt surface resistance (horizontal heat flow) 0.13Gypsum 0.013 0.35 0.037Light Brick 0.102 0.8 0.128Unventilated air layer 0.05 0.18Light Brick 0.102 0.8 0.128Ext surface resistance (horizontal heat flow) 0.04

0.267 0.642 1.5611” filled cavity wall

Int surface resistance (horizontal heat flow) 0.13Gypsum 0.013 0.35 0.037Light Brick 0.102 0.8 0.128filled cavity wall 0.05 0.043 1.163Light Brick 0.102 0.8 0.128Ext surface resistance (horizontal heat flow) 0.04

0.267 1.625 0.6215” filled cavity wall

Int surface resistance (horizontal heat flow) 0.13Gypsum 0.013 0.35 0.037Light Brick 0.102 0.8 0.128filled cavity wall 0.1 0.043 2.326high performance aerated bloc 0.19 0.24 0.792Ext surface resistance (horizontal heat flow) 0.04

0.405 3.452 0.29

Uk

Rsi

d1 λ1 R1= d1/λ1

dn λn Rn = dn/λn

Rse

Total thickness and Uk Σ di Σ Rse 1/Σ Rse




Kitch-Diner

Page 1

ADDRESS 1 House, A Street, Newtown JOB 2 Bed End TerraceCounty, SW1 1XX GEOG. London

Design Room Temp 21 Degree Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CKitchen Diner 1.5 4.9 2.7 2.4 47.63 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 4.9 2.7 0.3 13.23 0.24 22.8EXT WALL (gross area) 7.6 2.4 18.24WINDOW GLAZING 1.1 1.05 1 1.16 1.6 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 2.1 1.75 1 3.68 1.6 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 13.41 0.29 22.8CEILING or ROOF (gross area) 0 0 0.00ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 0.00 0 22.8PARTY WALL 2.7 2.4 0.3 6.48 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elemeEXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 4.9 2.7 11 13.23TOTAL ROOM HEAT LOSS

fk, Temp

frh

Kitch-Diner

Page 2

2 Bed End Terrace

Power Energy U-ValueHeat Loss Heat Loss Taken from

Difference & NotesWatts kWh

369 593

72 35 Table 6.9 (100 mm)

42 68 Table 6.8 (triple, low-E, argon)0 0

134 215 Table 6.8 (triple, low-E, argon)89 142 see U-values (15” filled cavity wall)

0 00 00 030 U-Value = Part L max0 0

736 10530 0

146882 1053

Living A

Page 1


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CLiving Room A 0.5 2.76 4.45 2.4 14.74 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 2.76 4.45 0.3 12.28 0.19 22.8EXT WALL (gross area) 2.76 2.4 6.62WINDOW GLAZING 2 1.05 1 2.10 1.6 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 4.52 0.29 22.8CEILING or ROOF (gross area) 0 0 0.00ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 0.00 0 22.8PARTY WALL 4.45 2.4 0.3 10.68 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 2.76 4.45 11 12.28TOTAL ROOM HEAT LOSS

Living A

Page 2

2 Bed End Terrace



114 184

53 26 Table 6.11 (100 mm)

77 123 Table 6.8 (triple, low-E, argon)0 0 0 030 48 see U-values (15” filled cavity wall)

0 00 00 049 U-Value = Part L max0 0

323 3800 0

135458 380

Living B

Page 3


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CLiving Room B 0.5 0.9 2.72 2.4 2.94 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0.9 2.72 0.3 2.45 0.15 22.8EXT WALL (gross area) 0 2.4 0.00WINDOW GLAZING 0 0 1 0.00 0 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 0.00 0.29 22.8CEILING or ROOF (gross area) 0 0 0.00ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 0.00 0 22.8PARTY WALL 0 2.4 0.3 0.00 0 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 0.9 2.72 11 2.45TOTAL ROOM HEAT LOSS

Living B

Page 4

2 Bed End Terrace



23 37 BS EN 12831

8 4 Table 6.11 (100 mm); (used 7-10 m)

0 00 00 00 0 see U-values (15” filled cavity wall)

0 00 00 000 0

31 410 02758 41

Hall A

Page 5


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CHall A 0.5 2.14 1.73 2.4 4.44 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 2.14 1.73 0.3 3.70 0.26 22.8EXT WALL (gross area) 3.87 2.4 9.29WINDOW GLAZING 0 0 1 0.00 0 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0.8 1.95 1 1.56 1.6 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 7.73 0.29 22.8CEILING or ROOF (gross area) 0 0 0.00ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 0.00 0 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 2.14 1.73 11 3.70TOTAL ROOM HEAT LOSS

Hall A

Page 6

2 Bed End Terrace



34 55

22 11 Table 6.9 (100 mm)

0 00 0 57 91 Table 6.8 (triple, low-E, argon)51 82 see U-values (15” filled cavity wall)

0 00 00 000 0

164 2390 041

205 239

Hall B

Page 7


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CHall B 0.5 1.24 2.72 2.4 4.05 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 1.24 2.72 0.3 3.37 0.25 22.8EXT WALL (gross area) 2.72 2.4 6.53WINDOW GLAZING 0 0 1 0.00 0 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 6.53 0.29 22.8CEILING or ROOF (gross area) 0 0 0.00ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 0.00 0 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 1.24 2.72 11 3.37TOTAL ROOM HEAT LOSS

Hall B

Page 8

2 Bed End Terrace



31 50

19 9 Table 6.11 (100 mm)

0 00 0 0 043 69 see U-values (15” filled cavity wall)

0 00 00 000 0

94 1290 037

131 129

Bed 1A

Page 9


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CBedroom 1A 0.5 3.66 3.66 2.4 16.07 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 3.66 2.4 8.78WINDOW GLAZING 1.1 1.05 1 1.16 0.16 22.8WINDOW GLAZING 1.1 1.05 1 1.16 0.16 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 6.47 0.29 22.8CEILING or ROOF (gross area) 3.66 3.66 13.40ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 13.40 0.12 22.8PARTY WALL 3.66 2.4 0.3 8.78 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 3.66 3.66 11 13.40TOTAL ROOM HEAT LOSS

Bed 1A

Page 10

2 Bed End Terrace



125 200

0 0

4 7 Table 6.8 (triple, low-E, argon)4 7 Table 6.8 (triple, low-E, argon)0 043 69 see U-values (15” filled cavity wall)

0 00 037 53 Table 6.7 (300 mm)40 U-Value = Part L max0 0

253 3350 0

147400 335

Bed 1B

Page 11


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CBedroom 1B 0.5 1.24 1.73 2.4 2.57 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 2.97 2.4 7.13WINDOW GLAZING 0 0 1 0.00 0 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 7.13 0.29 22.8CEILING or ROOF (gross area) 1.24 1.73 2.15ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 2.15 0.12 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 1.24 1.73 11 2.15TOTAL ROOM HEAT LOSS

Bed 1B

Page 12

2 Bed End Terrace



20 32

0 0

0 00 0 0 047 76 see U-values (15” filled cavity wall)


73 1160 02497 116

Bed 2

Page 1


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CBedroom 2 0.5 2.57 3.49 2.4 10.76 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 2.57 2.4 6.17WINDOW GLAZING 1.1 1.05 1 1.16 0.16 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 5.01 0.29 22.8CEILING or ROOF (gross area) 2.57 3.49 8.97ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 8.97 0.12 22.8PARTY WALL 3.49 2.4 0.3 8.38 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 2.57 3.49 11 8.97TOTAL ROOM HEAT LOSS

Bed 2

Page 2

2 Bed End Terrace



83 134

0 0

4 7 Table 6.8 (triple, low-E, argon)0 00 033 53 see U-values (15” filled cavity wall)


184 2300 099

282 230

Bath

Page 3


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CBedroom 1A 1.5 2.33 1.92 2.4 16.10 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 2.33 2.4 5.59WINDOW GLAZING 1.1 1.05 1 1.16 0.16 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 4.44 0.29 22.8CEILING or ROOF (gross area) 2.33 1.92 4.47ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 4.47 0.12 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 2.33 1.92 11 4.47TOTAL ROOM HEAT LOSS

Bath

Page 4

2 Bed End Terrace



125 201

0 0

4 7 Table 6.8 (triple, low-E, argon)0 0 Table 6.8 (triple, low-E, argon)0 029 47 see U-values (15” filled cavity wall)


171 2720 049

220 272

Landing A

Page 5


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CLanding A 0.5 1.24 2.13 2.4 3.17 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 2.13 2.4 5.11WINDOW GLAZING 0 0 1 0.00 0 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 5.11 0.29 22.8CEILING or ROOF (gross area) 1.24 2.13 2.64ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 2.64 0.12 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 1.24 2.13 11 2.64TOTAL ROOM HEAT LOSS

Landing A

Page 6

2 Bed End Terrace



25 39

0 0

0 00 00 034 54 see U-values (15” filled cavity wall)


66 1040 02995 104

Landing B

Page 7


Design Room Temp 21 Degree Temp Amount Air Design Lower Design Temp -1.8 Days Correction air heated change TempDesign Temp Diff 22.8 1526 Factor per hour factor DifferenceVENT HEAT LOSS AC/hr Length mWidth m Height m p.u. m3/hour W/m3K °CBedroom 1A 0.5 2.33 1.57 2.4 4.39 0.34 22.8FABRIC HEAT LOSS Area m2 U-ValueFLOOR 0 0 0.3 0.00 0 22.8EXT WALL (gross area) 1.57 2.4 3.77WINDOW GLAZING Round Window 1 0.20 0.16 22.8WINDOW GLAZING 0 0 1 0.00 0 22.8DOOR 0 0 1 0.00 0 22.8EXT WALL (net area) Subtract glazing & door from gross ext 1 3.57 0.29 22.8CEILING or ROOF (gross area) 2.33 1.57 3.66ROOF GLAZING 0 0 1 0.00 0 22.8ROOF GLAZING 0 0 1 0.00 0 22.8CEILING or ROOF (net Subtract roof glazing from gross roof 0.9 3.66 0.12 22.8PARTY WALL 0 2.4 0.3 0.00 0.2 22.8OTHER 0 2.4 0 0.00 0 22.8DESIGN HEAT LOSS FOR ROOM (Sum of Watts for all elements)EXPOSED LOCATION Yes If YES, add 10% 0 % to DESIGN HEAT LOSSINTERMITTENT HEAT 2.33 1.57 11 3.66TOTAL ROOM HEAT LOSS

Landing B

Page 8

2 Bed End Terrace



34 55

0 0

1 1 Table 6.8 (triple, low-E, argon)0 00 024 38 see U-values (15” filled cavity wall)


68 1080 040

109 108

ASHP

Page 9

Main Variables TableNo of Bedrooms 2 rooms Occupation level = No. bedrooms + 1 personFlow temp in HW mode 50 °C from design choicesHP capacity in HW mode 4.24 kW from Manufacturer's dataFlow temp in Space Heat mode 45 °C from design choicesHP capacity in Space Heat mode 4.38 kW from Manufacturer's dataMarginal Electricity Cost 12 p/kWh electricity price without standing chargeRunning mode for CH pump FLEQ (hrs) If not FLEQ, enter number of operational hoursPower CH Pump 105 W Default setting for speed 3 on 5m CH pump

Hot Water Energy CalculationNo of occupants/bedroom 1 persons Increase this if house > 1 person/roomHot water / occupant 45 litres/day (35 or 40 if steps taken to reduce HW consumption)η pipework loss HP to cyl 70 % eff of HW system. Set to 85% if tank-in-tankFinal HP secondary HW temperature 45 °C equals flow temp in HW mode – 5 °CHP SPF (at HW flow temp) 2.7HP HW electrical energy/day 2.91 kWh/dayImmersion HW electrical energy/day 2.36 kWh/dayTotal HW electrical energy/day 5.26 kWh for HW/day

Estimated Running Costs CalculationsSPF space heating 3FLEQ space heating 687 hoursFLEQ HW heating 676 hoursFLEQ total 1363 hoursElectrical Energy HP space heating 1003 kWh Electrical Energy HP HW heating 1061 kWh Cost Space Heating £120.34Cost HW Heating from HP £127.35Cost HW heating from immersion £103.16Cost CH Pump £17.17

Constants and AssumptionsSHC Water 4187 J/kgKJ to kWh 3600000water mains input temp 10 °Ckg to litres water 135 Heating HW flow temp °C 3.6 SPF40 Heating HW flow temp °C 3.4 SPF45 Heating HW flow temp °C 3 SPF50 Heating HW flow temp °C 2.7 SPF55 Heating HW flow temp °C 2.4 SPF60 Heating HW flow temp °C 2.1 SPF65 Heating HW flow temp °C 1.8 SPF

ASHP

Page 10

Results TablesOccupation level = No. bedrooms + 1 person Power Required Table

Space Heat Loss 2.94 kW Power required for HW heating 0.60 kW Total power from HP 3.54 kW Design Power for HP

electricity price without standing charge Energy Consumption TableIf not FLEQ, enter number of operational hours Space Heat Consumption 3008 kWhDefault setting for speed 3 on 5m CH pump HW Consumption HP 2865 kWh

Total Energy Consumption HP 5874 kWh Table 3 dataHW Consumption Immersion 860 kWh

Increase this if house > 1 person/room Total Energy Consumption 6734 kWh(35 or 40 if steps taken to reduce HW consumption)eff of HW system. Set to 85% if tank-in-tank

Information for Householderestimated costs for central heating provisionCost Space Heating £120.34Cost HW Heating from HP £127.35Cost HW heating from immersion £103.16Cost CH Pump £17.17Cyl & Pipework Part L * Yes see belowBest practice for HW implemented** Yes see belowBacteria pasteurisation implemented YesTotal estimated CH running cost £368.02Electrical System Performance 2924 kWh* Cylinder and pipework must be insulated toDomestic Building Services Compliance Guide.Change to Section 6 for Scotland & Part F for NI** HW store size matched to property and use ofinstantaneous points of use matched to store size.*** Electrical system performance is section 4.3

GSHP

Page 11

Main Variables TableNo of Bedrooms 2 rooms Occupation level = No. bedrooms + 1 personFlow temp in HW mode 50 °C from design choicesHP capacity in HW mode 4.75 kW from Manufacturer's dataFlow temp in Space Heat mode 45 °C from design choicesHP capacity in Space Heat mode 4.8 kW from Manufacturer's dataMarginal Electricity Cost 12 p/kWh electricity price without standing chargeRunning mode for CH pump FLEQ (hrs) If not FLEQ, enter number of operational hoursPower CH Pump 105 W Default setting for speed 3 on 5m CH pumpPower Ground HX pump 120 W 2.5% or lower of space heating power

Hot Water Energy CalculationNo of occupants/bedroom 1 persons Increase this if house > 1 person/roomHot water / occupant 45 litres/day (35 or 40 if steps taken to reduce HW consumption)η pipework loss HP to cyl 70 % eff of HW system. Set to 85% if tank-in-tankFinal HP secondary HW temperature 45 °C equals flow temp in HW mode – 5 °CHP SPF (at HW flow temp) 3.4HP HW electrical energy/day 2.31 kWh/dayImmersion HW electrical energy/day 2.36 kWh/dayTotal HW electrical energy/day 4.66 kWh for HW/day

Estimated Running Costs CalculationsSPF space heating 3.7FLEQ space heating 627 hoursFLEQ HW heating 603 hoursFLEQ total 1230 hoursElectrical Energy HP space heating 813 kWh Electrical Energy HP HW heating 843 kWh Cost Space Heating £97.57Cost HW Heating from HP £101.13Cost HW heating from immersion £103.16Cost CH Pump £15.50Cost Ground HX pump £17.71

Constants and AssumptionsSHC Water 4187 J/kgKJ to kWh 3600000water mains input temp 10 °Ckg to litres water 135 Heating HW flow temp °C 4.3 SPF40 Heating HW flow temp °C 4.1 SPF45 Heating HW flow temp °C 3.7 SPF50 Heating HW flow temp °C 3.4 SPF55 Heating HW flow temp °C 3.1 SPF60 Heating HW flow temp °C 2.8 SPF65 Heating HW flow temp °C 2.5 SPF

GSHP

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Results TablesOccupation level = No. bedrooms + 1 person Power Required Table

Space Heat Loss 2.94 kW Power required for HW heating 0.60 kW Total power from HP 3.54 kW Design Power for HP

electricity price without standing charge Energy Consumption TableIf not FLEQ, enter number of operational hours Space Heat Consumption 3008 kWhDefault setting for speed 3 on 5m CH pump HW Consumption HP 2865 kWh2.5% or lower of space heating power Total Energy Consumption HP 5874 kWh Table 3 data

HW Consumption Immersion 860 kWhTotal Energy Consumption 6734 kWh

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 Information for Householder

estimated costs for central heating provisionCost Space Heating £97.57Cost HW Heating from HP £101.13Cost HW heating from immersion £103.16Cost CH Pump £15.50Cyl & Pipework Part L * Yes see belowBest practice for HW implemented** Yes see belowBacteria pasteurisation implemented YesAntifreeze to -10 °C YesBiocide to Spec in Antifreeze YesAntifreeze checked 2 samples YesTotal estimated CH running cost £317.36Electrical System Performance 2516 kWh* Cylinder and pipework must be insulated toDomestic Building Services Compliance Guide.Change to Section 6 for Scotland & Part F for NI** HW store size matched to property and use ofinstantaneous points of use matched to store size.*** Electrical system performance is section 4.3

12 14 15.5

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Glasgow Jan Feb Mar Apr May Jun July Aug Sept Oct Nov Dec12 248 217 195 142 73 32 11 15 39 96 172 236 147614 309 274 256 198 118 64 30 35 75 148 230 297 2034

15.5 357 317 303 242 159 97 54 61 108 192 276 342 2508

Heathrow12 207 192 151 101 37 8 1 2 11 46 130 187 107314 267 247 208 150 72 24 6 8 28 86 184 246 1526

15.5 314 290 255 192 105 45 16 18 51 124 228 293 1931

AMENDMENTS ISSUED SINCE PUBLICATION

Document Number: Amendment Details:

1 Original draft version for comment.

1.1 Corrections to formula errors on ASHP and GSHP pages.

Date:

4/1/2012

4/20/2012

new build house using bs en 12831 simplified method v 1 1

Documents

assumptions

kwhday kwhday

5m ch pump

householder

horizontal

amount air

bacteria pasteurisation

reduce hw