Publication - Research and analysis

Energy Efficiency Standard for Social Housing: peer review

Published: 22 Oct 2013
Directorate:
Energy and Climate Change Directorate
Part of:
Environment and climate change
ISBN:
9781782569961

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

Energy Efficiency Standard for Social Housing: peer review
Annex G

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