Publication - Research and analysis
Energy Efficiency Standard for Social Housing: peer review
Peer review scrutinising the example dwellings in the Energy Efficiency Standard for Social Housing consultation document.
Annex G
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
| 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
| 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
| 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
| 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
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