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Publication - Report

Energy Efficiency Standard for Social Housing: peer review

Published: 22 Oct 2013
Part of:
Environment and climate change
ISBN:
9781782569961

Peer review scrutinising the example dwellings in the Energy Efficiency Standard for Social Housing consultation document.

246 page PDF

3.8MB

246 page PDF

3.8MB

Contents
Energy Efficiency Standard for Social Housing: peer review
Annex G

246 page PDF

3.8MB

Annex G

Building Type Group A Pre 1919 Solid Wall flats and houses

Building Type Group A - Pre 1919 Solid Wall flats and houses

Case study A-1E: Pre 1919 solid wall dwelling - ground floor (55m 2)
Fuel type: Electricity
Baseline annual fuel costs: £831
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation - - Internal insulation
(£5,500)
Floor No insulation - - Insulation
(£1,200)
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £4,765 - £11,465
Annual fuel cost savings - £213 - £382
Percentage annual fuel cost savings - 26% - 46%
SAP Rating E (52) D (65) - C (74)
EI Rating F (33) E (42) - D (57)
Approximate CO 2 emissions kg/m 2/year 105 83 - 58
Percentage CO 2 improvement - 21% - 45%
Case study A-2E: Pre 1919 solid wall dwelling - mid floor (58m 2)
Fuel type: Electricity
Baseline annual fuel costs: £678
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation - - Internal insulation
(£5,500)
Floor - - - -
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £4,765 - £13,965
Annual fuel cost savings - £174 - £324
Percentage annual fuel cost savings - 26% - 48%
SAP Rating D (64) C (72) - C (80)
EI Rating E (43) E (53) - C (69)
Approximate CO 2 emissions kg/m 2/year 79 62 - 41
Percentage CO 2 improvement - 22% - 48%
Case study A-3E: Pre 1919 solid wall dwelling - top floor (67m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,309
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation No insulation - Internal insulation
(£5,500)
Floor - No insulation - -
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters (£1,050) - -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater Electric room heater - -
Ventilation natural natural - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £1,565 £5,548 £11,048
Annual fuel cost savings - £664 - £890
Percentage annual fuel cost savings - 51% - 68%
SAP Rating F (35) D (67) C (74) C (79)
EI Rating G (18) E (46) D (57) D (66)
Approximate CO 2 emissions kg/m 2/year 139 70 54 43
Percentage CO 2 improvement - 50% 61% 69%
Case study A-1G: Pre 1919 solid wall dwelling - ground floor (55m 2)
Fuel type: Gas
Baseline annual fuel costs: £823
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation - - Internal insulation
(£5,500)
Floor No insulation - - Insulation
(£1,200)
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £3,715 £6,515 £16,915
Annual fuel cost savings - £74 £333 £417
Percentage annual fuel cost savings - 9% 40% 51%
SAP Rating E (51) D (56) C (71) C (76)
EI Rating E (49) E (53) C (72) C (79)
Approximate CO 2 emissions kg/m 2/year 71 65 37 28
Percentage CO 2 improvement - 8% 48% 61%
Case study A-2G: Pre 1919 solid wall dwelling - mid floor (58m 2)
Fuel type: Gas
Baseline annual fuel costs: £719
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation - - Internal insulation
(£5,500)
Floor - - - -
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £3,715 £6,515 £15,715
Annual fuel cost savings - £77 £284 £364
Percentage annual fuel cost savings - 11% 39% 51%
SAP Rating D (59) D (63) C (75) C (80)
EI Rating D (57) D (62) C (78) B (83)
Approximate CO 2 emissions kg/m 2/year 57 52 30 22
Percentage CO 2 improvement - 9% 47% 61%
Case study A-3G: Pre 1919 solid wall dwelling - top floor (67m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,131
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation - - Internal insulation
(£5,500)
Floor - - - -
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £4,215 £7,298 £16,498
Annual fuel cost savings - £408 £673 £736
Percentage annual fuel cost savings - 36% 60% 65%
SAP Rating E (40) D (62) C (76) C (79)
EI Rating F (38) D (59) C (78) B (82)
Approximate CO 2 emissions kg/m 2/year 85 51 28 22
Percentage CO 2 improvement - 40% 67% 74%

Building Type Group B - Interwar (1919-1949) Cavity Wall Houses and Flats

Building Type Group B - Interwar (1919-1949) Cavity Wall Houses and Flats

Case study B-4E: 1930-49 mid floor flat (78m 2)
Fuel type: Electricity
Baseline annual fuel costs: £698
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Old (large volume) storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Manual charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £4,215 £5,265 £8,965
Annual fuel cost savings - £248 £296 £333
Percentage annual fuel cost savings - 36% 42% 48%
SAP Rating D (68) C (79) B (81) B (83)
EI Rating E (50) D (68) C (71) C (74)
Approximate CO 2 emissions kg/m 2/year 59 38 34 31
Percentage CO 2 improvement - 36% 42% 47%
Case study B-5E: 1930-49 mid terrace (80m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,417
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (post 2003) (£3,700) - -
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £5,765 - £14,965
Annual fuel cost savings - £833 - £866
Percentage annual fuel cost savings - 59% - 61%
SAP Rating F (36) C (73) - C (80)
EI Rating G (19) D (55) - D (63)
Approximate CO 2 emissions kg/m 2/year 126 52 - 43
Percentage CO 2 improvement - 59% - 66%
Case study B-6E: 1930-49 semi-detached (92m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,848
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (post 2003)
(£3,700)
- -
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £5,768 - £14,968
Annual fuel cost savings - £1,105 - £1,153
Percentage annual fuel cost savings - 60% - 62%
SAP Rating F (27) C (69) - C (76)
EI Rating G (11) E (47) - D (55)
Approximate CO 2 emissions kg/m 2/year 146 60 - 50
Percentage CO 2 improvement - 59% - 66%
Case study B-4G: 1930-49 mid floor flat (78m2)
Fuel type: Gas
Baseline annual fuel costs: £744
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £515 £7,015 -
Annual fuel cost savings - £135 £377 -
Percentage annual fuel cost savings - 18% 51% -
SAP Rating D (64) C (71) B (82) -
EI Rating D (63) C (70) B (86) -
Approximate CO 2 emissions kg/m 2/year 44 35 17 -
Percentage CO 2 improvement - 20% 61% -
Case study B-5G: 1930-49 mid terrace (80m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,228
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £4,715 £7,798 £20,698
Annual fuel cost savings - £428 £717 £758
Percentage annual fuel cost savings - 35% 58% 62%
SAP Rating E (42) D (62) C (76) B (83)
EI Rating E (39) D (59) C (76) B (84)
Approximate CO 2 emissions kg/m 2/year 78 48 27 19
Percentage CO 2 improvement - 38% 65% 76%
Case study B-6G: 1930-49 semi-detached (92m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,512
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £4,718 £7,801 £20,701
Annual fuel cost savings - £559 £907 £956
Percentage annual fuel cost savings - 37% 60% 63%
SAP Rating F (36) D (59) C (74) B (81)
EI Rating F (33) E (54) C (74) B (81)
Approximate CO 2 emissions kg/m 2/year 86 51 29 21
Percentage CO 2 improvement - 41% 66% 76%

Building Type Group C - Four in a Block - 1920-1949

Building Type Group C - Four in a Block - 1920-1949

Case study C-7E: 1930-49 Four-in-a-block lower (94m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,282
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof - - - -
Windows 100% single glazing 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £5,268 - £6,468
Annual fuel cost savings - £585 - £665
Percentage annual fuel cost savings - 46% - 52%
SAP Rating E (47) C (71) - C (75)
EI Rating F (28) E (51) - D (57)
Approximate CO 2 emissions kg/m 2/year 97 55 - 48
Percentage CO 2 improvement - 43% - 51%
Case study C-8E: 1930-49 Four-in-a-block upper (87m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,843
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof No insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- -
Open chimneys None - - -
Heating system Old (large volume) storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Manual charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £4,718 £5,768 £13,768
Annual fuel cost savings - £1,159 £1,252 £1,252
Percentage annual fuel cost savings - 63% 68% 68%
SAP Rating F (25) C (70) C (74) B (85)
EI Rating G (9) E (52) D (56) D (66)
Approximate CO 2 emissions kg/m 2/year 154 55 49 39
Percentage CO 2 improvement - 64% 68% 75%
Case study C-7G: 1930-49 Four-in-a-block lower (94m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,169
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof - - - -
Windows 100% single glazing - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £518 £3,318 £8,218
Annual fuel cost savings - £244 £559 £653
Percentage annual fuel cost savings - 21% 48% 56%
SAP Rating E (50) D (61) C (74) C (78)
EI Rating E (46) D (56) C (74) C (79)
Approximate CO 2 emissions kg/m 2/year 62 48 29 23
Percentage CO 2 improvement - 23% 53% 63%
Case study C-8G: 1930-49 Four-in-a-block upper (87m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,500
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £1,018 £4,101 £15,801
Annual fuel cost savings - £635 £967 £1,020
Percentage annual fuel cost savings - 42% 64% 68%
SAP Rating F (34) D (61) C (76) B (89)
EI Rating F (32) D (57) C (77) B (89)
Approximate CO 2 emissions kg/m 2/year 90 48 26 12
Percentage CO 2 improvement - 47% 71% 87%

Building Type Group D - 1950-1964 Cavity Wall Houses and Flats

Building Type Group D - 1950-1964 Cavity Wall Houses and Flats

Case study D-9E: 1950-1964 post war mid-floor flat (110m 2)
Fuel type: Electricity
Baseline annual fuel costs: £831
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- -
Open chimneys None - - -
Heating system Old (large volume) storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Manual charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £518 £5,268 -
Annual fuel cost savings - £218 £402 -
Percentage annual fuel cost savings - 26% 48% -
SAP Rating C (69) C (77) B (84) -
EI Rating E (52) D (64) C (75) -
Approximate CO 2 emissions kg/m 2/year 51 38 26 -
Percentage CO 2 improvement - 25% 49% -
Case study D-10E: 1950-1964 post war mid-terrace (70m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,220
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- -
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £5,765 - £18,665
Annual fuel cost savings - £665 - £731
Percentage annual fuel cost savings - 55% - 60%
SAP Rating E (40) C (72) - C (80)
EI Rating F (22) E (54) - D (64)
Approximate CO 2 emissions kg/m 2/year 124 57 - 44
Percentage CO 2 improvement - 54% - 65%
Case study D-11E: 1950-1964 post war semi-detached (84m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,923
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None 20% of roof area
(£8,000)
- -
Total cost of all measures applied since baseline - £13,765 - £14,965
Annual fuel cost savings - £1,155 - £1,208
Percentage annual fuel cost savings - 60% - 63%
SAP Rating F (22) C (71) - C (73)
EI Rating G (7) E (45) - E (51)
Approximate CO 2 emissions kg/m 2/year 166 62 - 57
Percentage CO 2 improvement - 63% - 66%
Case study D-9G: 1950-1964 post war mid-floor flat (110m 2)
Fuel type: Gas
Baseline annual fuel costs: £859
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £518 £3,318 £7,018
Annual fuel cost savings - £176 £370 £439
Percentage annual fuel cost savings - 20% 43% 51%
SAP Rating D (67) C (74) B (81) B (84)
EI Rating D (65) C (73) B (83) B (86)
Approximate CO 2 emissions kg/m 2/year 37 28 18 15
Percentage CO 2 improvement - 24% 51% 59%
Case study D-10G: 1950-1964 post war mid-terrace (70m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,081
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £1,015 £4,098 £16,998
Annual fuel cost savings - £299 £571 £645
Percentage annual fuel cost savings - 28% 53% 60%
SAP Rating E (44) D (60) C (74) B (82)
EI Rating E (41) D (56) C (75) B (84)
Approximate CO 2 emissions kg/m 2/year 77 53 31 19
Percentage CO 2 improvement - 31% 60% 75%
Case study D-11G: post war semi-detached (84m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,512
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof No insulation 100mm at joists
(£500)
250mm at joists
(£283)
-
Windows 100% single glazing - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £1,015 £4,098 £16,998
Annual fuel cost savings - £488 £863 £952
Percentage annual fuel cost savings - 32% 57% 63%
SAP Rating F (33) E (53) C (70) C (79)
EI Rating F (30) E (48) C (69) C (79)
Approximate CO 2 emissions kg/m 2/year 94 61 35 24
Percentage CO 2 improvement - 35% 63% 74%

Building Type Group E - 1976-1983 flats and houses

Case study E-12E: 1976-83 mid-floor flat (60m 2)
Fuel type: Electricity
Baseline annual fuel costs: £510
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Old (large volume) storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Manual charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £515 £5,265 -
Annual fuel cost savings - £98 £221 -
Percentage annual fuel cost savings - 19% 43% -
SAP Rating C (72) C (78) B (84) -
EI Rating D (58) D (65) C (77) -
Approximate CO 2 emissions kg/m 2/year 55 45 31 -
Percentage CO 2 improvement - 18% 44% -
Case study E-13E: 1976-83 mid-terrace (84m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,258
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof 50mm insulation 100mm at joists
(£283)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam - - Electric immersion with 80mm factory applied foam
(£23)
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £5,551 £5,834 £18,757
Annual fuel cost savings - £497 £529 £634
Percentage annual fuel cost savings - 40% 42% 50%
SAP Rating E (44) D (66) D (68) C (77)
EI Rating F (25) E (45) E (47) D (58)
Approximate CO 2 emissions kg/m 2/year 105 66 63 48
Percentage CO 2 improvement - 37% 40% 54%
Case study E-14E: 1976-83 semi-detached (108m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,538
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor No insulation - - Insulation
(£1,200)
Roof 50mm insulation 250mm at joists
(£500)
- -
Windows 100% single glazing 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Old (large volume) storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Manual charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £5,768 - £14,968
Annual fuel cost savings - £723 - £777
Percentage annual fuel cost savings - 47% - 51%
SAP Rating E (42) C (69) - C (77)
EI Rating F (24) E (49) - D (57)
Approximate CO 2 emissions kg/m 2/year 101 55 - 46
Percentage CO 2 improvement - 46% - 54%
Case study E-12G: 1976-83 mid-floor flat (60m 2)
Fuel type: Gas
Baseline annual fuel costs: £581
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - -
Roof - - - -
Windows 100% single glazing - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - -
Total cost of all measures applied since baseline - £515 £7,015 -
Annual fuel cost savings - £59 £260 -
Percentage annual fuel cost savings - 10% 45% -
SAP Rating D (66) C (71) B (82) -
EI Rating D (66) C (71) B (86) -
Approximate CO 2 emissions kg/m 2/year 44 37 18 -
Percentage CO 2 improvement - 16% 59% -
Case study E-13G: 1976-83 mid-terrace (84m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,151
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - Insulation
(£1,200)
Roof 50mm insulation 100mm at joists
(£283)
250mm at joists
(£283)
-
Windows 100% single glazing - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £801 £7,584 £16,784
Annual fuel cost savings - £190 £614 £638
Percentage annual fuel cost savings - 17% 53% 55%
SAP Rating E (47) D (56) C (75) B (81)
EI Rating E (43) E (51) C (76) B (82)
Approximate CO 2 emissions kg/m 2/year 69 57 27 20
Percentage CO 2 improvement - 17% 61% 71%
Case study E-14G: 1976-83 semi-detached (108m 2)
Fuel type: Gas
Baseline annual fuel costs: £1,365
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls No insulation Cavity filled
(£500)
- -
Floor - - - Insulation
(£1,200)
Roof 50mm insulation 100mm at joists
(£283)
250mm at joists
(£283)
-
Windows 100% single glazing 100% double glazing (pre 2003)
(£3,700)
- 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£18)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £801 £3,884 £16,784
Annual fuel cost savings - £334 £719 £772
Percentage annual fuel cost savings - 24% 53% 57%
SAP Rating E (47) D (60) C (75) B (82)
EI Rating E (42) D (55) C (74) B (82)
Approximate CO 2 emissions kg/m 2/year 65 48 27 19
Percentage CO 2 improvement - 26% 58% 71%

Building Type Group F - 1984-1991 houses and flats

Case study F-15E: 1984-91 mid-floor flat (60m 2)
Fuel type: Electricity
Baseline annual fuel costs: £392
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - Additional wall insulation
(£5,550)
Floor - - - -
Roof - - - -
Windows 100% double glazing (pre 2003) - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £1,065 £10,265
Annual fuel cost savings - - £59 £109
Percentage annual fuel cost savings - - 15% 28%
SAP Rating C (79) - B (82) B (85)
EI Rating C (69) - C (72) C (70)
Approximate CO 2 emissions kg/m 2/year 40 - 36 30
Percentage CO 2 improvement - - 10% 25%
Case study F-16E: 1984-91 mid-terrace (76m 2)
Fuel type: Electricity
Baseline annual fuel costs: £780
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor No insulation - - -
Roof 100mm insulation 250mm at joists
(£283)
- -
Windows 100% double glazing (pre 2003) - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Modern slimline storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Automatic charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam - - Electric immersion with 80mm factory applied foam
(£23)
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - £1,348 - £13,048
Annual fuel cost savings - £138 - £181
Percentage annual fuel cost savings - 18% - 23%
SAP Rating D (63) C (70) - C (77)
EI Rating E (44) E (49) - D (57)
Approximate CO 2 emissions kg/m 2/year 69 61 - 51
Percentage CO 2 improvement - 12% - 26%
Case study F-17E: 1984-91 semi-detached (74m 2)
Fuel type: Electricity
Baseline annual fuel costs: £1,010
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor No insulation - - -
Roof 100mm insulation 250mm at joists
(£283)
- -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Modern slimline storage heaters Fan storage heaters
(£1,050)
- -
Heating system controls Automatic charge control Automatic charge control (included in storage heating costs) - -
Hot water system Electric immersion with 25mm factory applied foam Electric immersion with 80mm factory applied foam (included in storage heating costs) - -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None 20% of roof area
(£8,000)
- -
Solar Hot Water 3m 2
(£4,000)
Total cost of all measures applied since baseline - £9,348 £13,048 £17,048
Annual fuel cost savings - £225 £264 £307
Percentage annual fuel cost savings - 22% 26% 30%
SAP Rating E (51) D (67) C (69) C (71)
EI Rating F (32) E (42) E (45) E (48)
Approximate CO 2 emissions kg/m 2/year 95 74 69 64
Percentage CO 2 improvement - 22% 27% 33%
Case study F-15G: 1984-91 mid-floor flat (60m 2)
Fuel type: Gas
Baseline annual fuel costs: £517
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor - - - -
Roof - - - -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £6,515 -
Annual fuel cost savings - - £184 -
Percentage annual fuel cost savings - - 36% -
SAP Rating C (71) - B (81) -
EI Rating C (73) - B (86) -
Approximate CO 2 emissions kg/m 2/year 36 - 19 -
Percentage CO 2 improvement - - 47% -
Case study F-16G: 1984-91 mid-terrace (76m 2)
Fuel type: Gas
Baseline annual fuel costs: £845
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor No insulation - - -
Roof 100mm insulation - 250mm at joists
(£283)
-
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £6,798 £14,798
Annual fuel cost savings - - £348 £348
Percentage annual fuel cost savings - - 41% 41%
SAP Rating D (59) - C (76) C (80)
EI Rating D (55) - C (77) B (81)
Approximate CO 2 emissions kg/m 2/year 53 - 27 22
Percentage CO 2 improvement - - 49% 58%
Case study F-17G: 1984-91 semi-detached (74m 2)
Fuel type: Gas
Baseline annual fuel costs: £969
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor No insulation - - -
Roof 100mm insulation - 250mm at joists
(£283)
-
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 25mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £6,798 £14,798
Annual fuel cost savings - - £400 £400
Percentage annual fuel cost savings - - 41% 41%
SAP Rating E (52) - C (72) C (76)
EI Rating E (48) - C (72) C (76)
Approximate CO 2 emissions kg/m 2/year 64 - 34 28
Percentage CO 2 improvement - - 47% 56%

Building Type Group G - 1992-1998 Houses and Flats

Building Type Group G - 1992-1998 Houses and Flats

Case study G-18E: 1992-98 mid-floor flat (70m 2)
Fuel type: Electricity
Baseline annual fuel costs: £494
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor - - - -
Roof - - - -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 50mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £4,765 -
Annual fuel cost savings - - £93 -
Percentage annual fuel cost savings - - 19% -
SAP Rating C (76) - C (80) -
EI Rating D (64) - C (69) -
Approximate CO 2 emissions kg/m 2/year 44 - 39 -
Percentage CO 2 improvement - - 11% -
Case study G-19E: 1992-98 mid-terrace (76m 2)
Fuel type: Electricity
Baseline annual fuel costs: £732
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor Insulation - - -
Roof 100mm insulation 250mm at joists
(£283)
- -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None 20% of roof area
(£8,000)
- -
Total cost of all measures applied since baseline - £8,298 £13,048 -
Annual fuel cost savings - £71 £172 -
Percentage annual fuel cost savings - 10% 23% -
SAP Rating D (65) C (74) C (78) -
EI Rating E (47) E (54) D (60) -
Approximate CO 2 emissions kg/m 2/year 64 55 47 -
Percentage CO 2 improvement - 14% 27% -
Case study G-20E: 1992-98 semi-detached (74m 2)
Fuel type: Electricity
Baseline annual fuel costs: £857
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor Insulation - - -
Roof 100mm insulation 250mm at joists
(£283)
- -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 25mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None 100%
(£15)
- -
Solar PVs None 20% of roof area
(£8,000)
- -
Total cost of all measures applied since baseline - £8,298 £13,048 -
Annual fuel cost savings - £68 £184 -
Percentage annual fuel cost savings - 8% 21% -
SAP Rating D (59) D (67) C (72) -
EI Rating E (39) E (45) E (50) -
Approximate CO 2 emissions kg/m 2/year 79 69 61 -
Percentage CO 2 improvement - 13% 23% -
Case study G-18G: 1992-98 mid-floor flat (70m 2)
Fuel type: Gas
Baseline annual fuel costs: £606
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor - - - -
Roof - - - -
Windows 100% double glazing (pre 2003) - 100% double glazing (post 2003)
(£3,700)
-
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £6,515 -
Annual fuel cost savings - - £219 -
Percentage annual fuel cost savings - - 36% -
SAP Rating C (69) - C (80) -
EI Rating C (69) - B (83) -
Approximate CO 2 emissions kg/m 2/year 38 - 21 -
Percentage CO 2 improvement - - 45% -
Case study G-19G: 1992-98 mid-terrace (76m 2)
Fuel type: Gas
Baseline annual fuel costs: £708
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor Insulation - - -
Roof 100mm insulation - 250mm at joists
(£283)
-
Windows 100% double glazing (pre 2003) - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer, room thermostat and TRVs - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £3,098 £14,798
Annual fuel cost savings - - £210 £230
Percentage annual fuel cost savings - - 30% 32%
SAP Rating D (65) - C (76) B (81)
EI Rating D (64) - C (77) B (83)
Approximate CO 2 emissions kg/m 2/year 42 - 27 21
Percentage CO 2 improvement - - 36% 50%
Case study G-20G: 1992-98 semi-detached (74m 2)
Fuel type: Gas
Baseline annual fuel costs: £792
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor Insulation - - -
Roof 100mm insulation - 250mm at joists
(£283)
-
Windows 100% double glazing (pre 2003) - - 100% double glazing (post 2003)
(£3,700)
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 66% - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer, room thermostat and TRVs - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £3,098 £14,798
Annual fuel cost savings - - £239 £257
Percentage annual fuel cost savings - - 30% 32%
SAP Rating D (61) - C (73) C (78)
EI Rating D (58) - C (73) C (79)
Approximate CO 2 emissions kg/m 2/year 50 - 32 26
Percentage CO 2 improvement - - 36% 48%

Building Type Group H - 1999 to 2007 Houses and Flats

Case study H-21E: 1999-2007 mid floor flat (63m 2)
Fuel type: Electricity
Baseline annual fuel costs: £353
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor - - - -
Roof - - - -
Windows 100% double glazing (post 2003) - -
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 38mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £1,065 -
Annual fuel cost savings - - £57 -
Percentage annual fuel cost savings - - 16% -
SAP Rating B (81) - B (84) -
EI Rating C (74) - C (77) -
Approximate CO 2 emissions kg/m 2/year 33 - 30 -
Percentage CO 2 improvement - - 9% -
Case study H-22E: 1999-2007 mid-terrace (97m 2)
Fuel type: Electricity
Baseline annual fuel costs: £682
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor Insulation - - -
Roof 200mm insulation (assumed) - 250mm at joists
(£283)
-
Windows 100% double glazing (post 2003) - -
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 38mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£18)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £1,351 £9,351
Annual fuel cost savings - - £100 £100
Percentage annual fuel cost savings - - 15% 15%
SAP Rating C (73) - C (77) B (82)
EI Rating D (57) - D (60) D (65)
Approximate CO 2 emissions kg/m 2/year 47 - 43 38
Percentage CO 2 improvement - - 9% 19%
Case study H-23E: 1999-2007 semi-detached (73m 2)
Fuel type: Electricity
Baseline annual fuel costs: £623
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - - -
Floor Insulation - - -
Roof 200mm insulation (assumed) - 250mm at joists
(£283)
-
Windows 100% double glazing (post 2003) - -
Open chimneys None - - -
Heating system Modern slimline storage heaters - Fan storage heaters
(£1,050)
-
Heating system controls Automatic charge control - Automatic charge control (included in storage heating costs) -
Hot water system Electric immersion with 38mm factory applied foam - Electric immersion with 80mm factory applied foam (included in storage heating costs) -
Secondary space heating Electric room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£18)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £1,351 £9,351
Annual fuel cost savings - - £89 £89
Percentage annual fuel cost savings - - 14% 14%
SAP Rating C (70) - C (74) C (79)
EI Rating E (53) - D (56) D (60)
Approximate CO 2 emissions kg/m 2/year 58 - 54 48
Percentage CO 2 improvement - - 7% 17%
Case study H-21G: 1999-2007 mid floor flat (63m 2)
Fuel type: Gas
Baseline annual fuel costs: £377
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor - - - -
Roof - - - -
Windows 100% double glazing (post 2003) - - -
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 78% (combi boiler) - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer, room thermostat and TRVs - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£15)
-
Solar PVs None - - -
Total cost of all measures applied since baseline - - £2,815 -
Annual fuel cost savings - - £58 -
Percentage annual fuel cost savings - - 15% -
SAP Rating C (79) - B (83) -
EI Rating B (84) - B (87) -
Approximate CO 2 emissions kg/m 2/year 21 - 17 -
Percentage CO 2 improvement - - 19% -
Case study H-22G: 1999-2007 mid-terrace (97m 2)
Fuel type: Gas
Baseline annual fuel costs: £590
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor Insulation - - -
Roof 200mm insulation (assumed) - 250mm at joists
(£283)
-
Windows 100% double glazing (post 2003) - - -
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 78% (combi boiler) - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer, room thermostat and TRVs - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£18)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £3,101 £11,101
Annual fuel cost savings - - £107 £107
Percentage annual fuel cost savings - - 18% 18%
SAP Rating C (75) - C (80) B (85)
EI Rating C (76) - B (81) B (86)
Approximate CO 2 emissions kg/m 2/year 26 - 20 15
Percentage CO 2 improvement - - 23% 42%
Case study H-23G: 1999-2007 semi-detached (73m 2)
Fuel type: Gas
Baseline annual fuel costs: £543
Energy Efficiency Measure Baseline: 1990 SHQS 2015 Further Measures 2020 Advanced Measures 2050
Walls Insulation - -
Floor Insulation - - -
Roof 200mm insulation (assumed) - 250mm at joists
(£283)
-
Windows 100% double glazing (post 2003) - - -
Open chimneys None - - -
Heating system Full central heating, boiler efficiency 78% (combi boiler) - Full central heating, boiler efficiency 90% (condensing combi)
(£2,500)
-
Heating system controls Programmer, room thermostat and TRVs - Time and temperature zone controls
(£300)
-
Hot water system Cylinder thermostat with 38mm factory applied foam - - -
Secondary space heating Gas room heater - - -
Ventilation natural - - -
Low energy lighting None - 100%
(£18)
-
Solar PVs None - - 20% of roof area
(£8,000)
Total cost of all measures applied since baseline - - £3,101 £11,101
Annual fuel cost savings - - £93 £93
Percentage annual fuel cost savings - - 17% 17%
SAP Rating C (73) - C (77) B (82)
EI Rating C (74) - C (79) B (84)
Approximate CO 2 emissions kg/m 2/year 31 - 25 20
Percentage CO 2 improvement - - 19% 35%

Contact

Email: Agnes Meany