Publication - Research and analysis
Developing regulation of energy efficiency of private sector housing (REEPS): modelling improvements to the target stock - Main Research Report
This report describes how the least energy efficient dwellings in the private sector were identified and how their ratings could be improved by a range of improvement measures. Modelling was used to ascertain the least cost way of reaching different standards, with findings presented on capital costs, fuel cost savings, carbon and energy reductions.
10 Appendix 4: Details Of Low Prevalence Archetypes
10.1 The table below gives details of the low prevalence groupings that each account for between 0.5% and 0.1% of the target stock, as discussed in Chapter 3.
Table A4.1: Summary of the low prevalence combinations.
| Initial Combination | Total sub-groups | Dwellings | %age of target stock | N | % in E[86] | % in F | % in G |
|---|---|---|---|---|---|---|---|
| Pre-1919-Semi/End Terr’-Sandstone-LPG boiler | 3 | 1950 | 0.5% | 8 | 14% | 74% | 12% |
| 1919-1964-Semi/End Terr’-Granite-Mains Gas boiler | 1 | 1950 | 0.5% | 7 | 100% | ||
| Pre-1919-4-in-a-block-Sandstone-Mains Gas boiler | 2 | 1900 | 0.5% | 8 | 86% | 14% | |
| 1919-1964-Tenement-Cavity Brick-Electric peak room heater | 2 | 1900 | 0.5% | 5 | 58% | 42% | |
| 1965-1975-Tenement-Cavity Brick-Off Peak Electric storage heating | 1 | 1900 | 0.5% | 7 | 100% | ||
| 1984-1991-Detached-Timber-Off Peak Electric storage heating | 1 | 1750 | 0.4% | 10 | 100% | ||
| 1919-1964-Semi/End Terr’-Cavity Brick-Solid fuel boiler | 2 | 1750 | 0.4% | 9 | 51% | 49% | |
| 1965-1975-Detached-Timber-Off Peak Electric storage heating | 2 | 1700 | 0.4% | 12 | 51% | 49% | |
| 1919-1964-Semi/End Terr’-Sandstone-Mains Gas boiler | 1 | 1700 | 0.4% | 7 | 100% | ||
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Sandstone-Mains Gas boiler | 1 | 1700 | 0.4% | 6 | 100% | ||
| 1965-1975-Tenement-Cavity Brick-Electric peak room heater | 3 | 1600 | 0.4% | 5 | 12% | 63% | 25% |
| 1976-1983-Detached-Timber-Off Peak Electric storage heating | 1 | 1600 | 0.4% | 13 | 100% | ||
| 1984-1991-Tenement-Cavity Brick-Off Peak Electric storage heating | 2 | 1600 | 0.4% | 5 | 72% | 28% | |
| Post 1991-Detached-Timber-Off Peak Electric storage heating | 2 | 1550 | 0.4% | 14 | 97% | 3% | |
| 1984-1991-Detached-Cavity Brick-Off Peak Electric storage heating | 1 | 1550 | 0.4% | 11 | 100% | ||
| Pre-1919-Semi/End Terr’-Sandstone-Solid fuel boiler | 3 | 1550 | 0.4% | 5 | 67% | 17% | 15% |
| 1965-1975-Semi/End Terr’-System-Off Peak Electric storage heating | 2 | 1500 | 0.4% | 6 | 70% | 30% | |
| 1919-1964-Mid-ter/Terr with passage/Enc’ end-Cavity Brick-Mains Gas boiler | 1 | 1400 | 0.3% | 5 | 100% | ||
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Granite-Off Peak Electric storage heating | 2 | 1350 | 0.3% | 5 | 62% | 38% | |
| 1976-1983-Semi/End Terr’-Cavity Brick-Off Peak Electric storage heating | 1 | 1350 | 0.3% | 6 | 100% | ||
| 1984-1991-Detached-Timber-LPG boiler | 3 | 1350 | 0.3% | 7 | 41% | 54% | 5% |
| Pre-1919-Detached-Sandstone-Solid fuel boiler | 3 | 1300 | 0.3% | 9 | 36% | 41% | 23% |
| 1919-1964-Semi/End Terr’-System-Off Peak Electric storage heating | 2 | 1300 | 0.3% | 5 | 72% | 28% | |
| Post 1991-Detached-Cavity Brick-Oil boiler | 1 | 1250 | 0.3% | 6 | 100% | ||
| 1919-1964-Detached-Cavity Brick-LPG boiler | 2 | 1200 | 0.3% | 5 | 62% | 38% | |
| 1976-1983-Semi/End Terr’-Cavity Brick-Mains Gas boiler | 1 | 1200 | 0.3% | 3 | 100% | ||
| 1976-1983-Semi/End Terr’-Timber-Off Peak Electric storage heating | 2 | 1150 | 0.3% | 6 | 97% | 3% | |
| 1976-1983-Detached-Cavity Brick-Mains Gas boiler | 1 | 1150 | 0.3% | 5 | 100% | ||
| 1919-1964-Detached-Sandstone-Oil boiler | 3 | 1150 | 0.3% | 19 | 80% | 17% | 3% |
| Post 1991-Detached-Timber-LPG boiler | 2 | 1150 | 0.3% | 7 | 83% | 17% | |
| Pre-1919-Flat from converted house-Sandstone-Electric peak room heater | 2 | 1100 | 0.3% | 5 | 45% | 55% | |
| 1965-1975-Detached-Timber-Oil boiler | 2 | 1100 | 0.3% | 8 | 97% | 3% | |
| Pre-1919-Flat from converted house-Granite-Mains Gas boiler | 1 | 1100 | 0.3% | 3 | 100% | ||
| Pre-1919-Detached-Granite-LPG boiler | 2 | 1100 | 0.3% | 4 | 25% | 75% | |
| 1965-1975-Detached-Cavity Brick-Oil/Gas/Electric warm air | 2 | 1100 | 0.3% | 4 | 68% | 32% | |
| 1919-1964-Detached-System-Mains Gas boiler | 1 | 1050 | 0.3% | 6 | 100% | ||
| 1976-1983-Tenement-Cavity Brick-Off Peak Electric storage heating | 2 | 1050 | 0.3% | 3 | 20% | 80% | |
| 1919-1964-Semi/End Terr’-Cavity Brick-Means gas room heater | 2 | 1050 | 0.3% | 3 | 66% | 34% | |
| 1919-1964-Semi/End Terr’-Timber-Off Peak Electric storage heating | 2 | 1050 | 0.3% | 7 | 76% | 24% | |
| 1965-1975-Detached-Cavity Brick-Electric peak/off-peak boiler | 2 | 1050 | 0.3% | 3 | 59% | 41% | |
| Pre-1919-Detached-Sandstone-Solid fuel/wood room heater | 3 | 1000 | 0.3% | 6 | 4% | 93% | 4% |
| 1965-1975-Mid-ter/Terr with passage/Enc’ end-Cavity Brick-Off Peak Electric storage heat | 1 | 950 | 0.2% | 6 | 100% | ||
| 1984-1991-Detached-Cavity Brick-Mains Gas boiler | 1 | 950 | 0.2% | 4 | 100% | ||
| 1984-1991-Detached-Cavity Brick-Oil boiler | 1 | 950 | 0.2% | 5 | 100% | ||
| Pre-1919-Detached-Granite-Solid fuel/wood room heater | 2 | 950 | 0.2% | 3 | 16% | 84% | |
| Pre-1919-Detached-Solid brick/Cob-Oil boiler | 2 | 950 | 0.2% | 4 | 4% | 96% | |
| Pre-1919-Detached-Sandstone-Wood boiler | 2 | 950 | 0.2% | 4 | 96% | 4% | |
| 1965-1975-Detached-System-Oil boiler | 1 | 900 | 0.2% | 2 | 100% | ||
| 1965-1975-Semi/End Terr’-Cavity Brick-Oil boiler | 1 | 900 | 0.2% | 4 | 100% | ||
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Sandstone-Solid fuel boiler | 1 | 900 | 0.2% | 4 | 100% | ||
| 1965-1975-Detached-System-Mains Gas boiler | 1 | 850 | 0.2% | 3 | 100% | ||
| Post 1991-Tenement-Cavity Brick-Off Peak Electric storage heating | 1 | 850 | 0.2% | 2 | 100% | ||
| 1965-1975-Mid-ter/Terr with passage/Enc’ end-Cavity Brick-Electric peak/off-peak boiler | 1 | 850 | 0.2% | 2 | 100% | ||
| 1976-1983-Detached-Cavity Brick-Off Peak Electric storage heating | 1 | 850 | 0.2% | 8 | 100% | ||
| Pre-1919-Semi/End Terr’-Granite-Solid fuel boiler | 2 | 850 | 0.2% | 3 | 34% | 66% | |
| 1919-1964-Semi/End Terr’-Cavity Brick-LPG boiler | 3 | 850 | 0.2% | 3 | 28% | 27% | 45% |
| 1919-1964-Tenement-Solid brick/Cob-Mains Gas boiler | 2 | 800 | 0.2% | 2 | 53% | 47% | |
| Pre-1919-Detached-Granite-Electric peak room heater | 2 | 800 | 0.2% | 2 | 49% | 51% | |
| 1919-1964-Detached-Sandstone-Mains Gas boiler | 1 | 800 | 0.2% | 2 | 100% | ||
| 1919-1964-Detached-System-Solid fuel boiler | 3 | 800 | 0.2% | 3 | 46% | 31% | 23% |
| 1984-1991-Detached-Timber-Electric peak/off-peak boiler | 2 | 800 | 0.2% | 2 | 47% | 53% | |
| 1919-1964-Detached-System-Oil boiler | 3 | 800 | 0.2% | 15 | 69% | 26% | 5% |
| 1919-1964-Detached-Granite-Oil boiler | 2 | 800 | 0.2% | 2 | 45% | 55% | |
| Pre-1919-Detached-Granite-Solid fuel boiler | 1 | 750 | 0.2% | 2 | 100% | ||
| 1919-1964-Mid-ter/Terr with passage/Enc’ end-Sandstone-Mains Gas boiler | 1 | 700 | 0.2% | 2 | 100% | ||
| 1984-1991-Detached-Cavity Brick-LPG boiler | 2 | 700 | 0.2% | 2 | 42% | 58% | |
| 1919-1964-Semi/End Terr’-Timber-Oil boiler | 1 | 700 | 0.2% | 3 | 100% | ||
| Pre-1919-4-in-a-block-Solid brick/Cob-Mains Gas boiler | 1 | 700 | 0.2% | 3 | 100% | ||
| Pre-1919-4-in-a-block-Sandstone-Off Peak Electric storage heating | 2 | 700 | 0.2% | 4 | 57% | 43% | |
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Sandstone-Oil boiler | 1 | 700 | 0.2% | 3 | 100% | ||
| 1965-1975-Semi/End Terr’-Cavity Brick-Electric peak/off-peak boiler | 2 | 700 | 0.2% | 2 | 48% | 52% | |
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Sandstone-Off Peak Electric storage heating | 1 | 700 | 0.2% | 4 | 100% | ||
| Pre-1919-Tenement-Granite-Electric peak room heater | 2 | 650 | 0.2% | 2 | 50% | 50% | |
| Pre-1919-Tenement-Sandstone-Solid fuel/wood room heater | 1 | 650 | 0.2% | 2 | 100% | ||
| 1965-1975-Mid-ter/Terr with passage/Enc’ end-Cavity Brick-Electric peak room heater | 2 | 650 | 0.2% | 2 | 60% | 40% | |
| 1919-1964-Tenement-System-Mains Gas boiler | 1 | 650 | 0.2% | 2 | 100% | ||
| 1919-1964-Detached-System-Off Peak Electric storage heating | 2 | 650 | 0.2% | 8 | 95% | 5% | |
| Pre-1919-4-in-a-block-Granite-Mains Gas boiler | 2 | 600 | 0.2% | 2 | 100% | ||
| 1919-1964-4-in-a-block-Cavity Brick-Off Peak Electric storage heating | 2 | 600 | 0.2% | 3 | 59% | 41% | |
| Post 1991-Detached-Sandstone-Oil boiler | 2 | 600 | 0.2% | 2 | 66% | 34% | |
| 1919-1964-Semi/End Terr’-Cavity Brick-Electric peak/off-peak boiler | 2 | 600 | 0.2% | 3 | 19% | 81% | |
| Pre-1919-Mid-ter/Terr with passage/Enc’ end-Granite-Mains Gas boiler | 1 | 600 | 0.2% | 2 | 100% | ||
| 1965-1975-Detached-System-LPG boiler | 2 | 600 | 0.2% | 2 | 32% | 68% | |
| Post 1991-Tenement-Cavity Brick-Electric peak room heater | 1 | 600 | 0.1% | 2 | 100% | ||
| Post 1991-Detached-Timber-Oil boiler | 1 | 600 | 0.1% | 3 | 100% | ||
| Pre-1919-Semi/End Terr’-Solid brick/Cob-Oil boiler | 1 | 550 | 0.1% | 3 | 100% | ||
| Post 1991-Detached-Timber-Mains Gas boiler | 1 | 550 | 0.1% | 2 | 100% | ||
| Post 1991-Semi/End Terr’-Granite-LPG boiler | 1 | 550 | 0.1% | 1 | 100% | ||
| Post 1991-Detached-Granite-Oil boiler | 1 | 550 | 0.1% | 3 | 100% | ||
| 1965-1975-Mid-ter/Terr with passage/Enc’ end-System-Off Peak Electric storage heating | 1 | 550 | 0.1% | 2 | 100% | ||
| Pre-1919-Tenement-Solid brick/Cob-Mains Gas boiler | 1 | 550 | 0.1% | 2 | 100% | ||
| Pre-1919-Semi/End Terr’-Sandstone-Electric peak room heater | 2 | 550 | 0.1% | 2 | 51% | 49% | |
| Pre-1919-Flat from converted house-Sandstone-Oil boiler | 2 | 550 | 0.1% | 3 | 93% | 7% | |
| 1976-1983-Mid-ter/Terr with passage/Enc’ end-Timber-Electric peak room heater | 1 | 550 | 0.1% | 1 | 100% | ||
| 1965-1975-Semi/End Terr’-Timber-Mains Gas boiler | 1 | 550 | 0.1% | 2 | 100% | ||
| Pre-1919-Flat from converted house-Solid brick/Cob-Mains Gas boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| 1919-1964-4-in-a-block-System-Mains Gas boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| Post 1991-Flat from converted house--Sandstone-Mains Gas boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| Pre-1919-Detached--Granite-Wood boiler | 1 | 500 | 0.1% | 3 | 100% | ||
| 1919-1964-Mid-ter/Terr with passage/Enc’ end-Cavity Brick-Electric peak/off-peak boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| 1965-1975-Detached-Timber-LPG boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| Pre-1919-Semi/End Terr’-Sandstone-Wood boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| 1984-1991-Semi/End Terr’-Timber-Off Peak Electric storage heating | 1 | 500 | 0.1% | 3 | 100% | ||
| 1976-1983-Detached-Cavity Brick-LPG boiler | 1 | 500 | 0.1% | 3 | 100% | ||
| 1984-1991-Detached-Timber-Oil boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| 1919-1964-Detached-Solid brick/Cob-Oil boiler | 2 | 500 | 0.1% | 3 | 8% | 92% | |
| Pre-1919-Tenement-Solid brick/Cob-Means gas room heater | 1 | 500 | 0.1% | 1 | 100% | ||
| Post 1991-Semi/End Terr’-Sandstone-LPG boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| Pre-1919-Semi/End Terr’-Sandstone-Electric peak/off-peak boiler | 1 | 500 | 0.1% | 2 | 100% | ||
| 1965-1975-Semi/End Terr’-Timber-Oil/Gas/Electric warm air | 1 | 500 | 0.1% | 2 | 100% | ||
| 1919-1964-Detached-Granite-Off Peak Electric storage heating | 1 | 450 | 0.1% | 1 | 100% | ||
| 1965-1975-Tenement-System-Off Peak Electric storage heating | 1 | 450 | 0.1% | 1 | 100% | ||
| Post 1991-Tenement-Granite-Off Peak Electric storage heating | 1 | 450 | 0.1% | 1 | 100% | ||
| 1919-1964-Tenement-Granite-Electric peak room heater | 1 | 450 | 0.1% | 1 | 100% | ||
| Pre-1919-Flat from converted house-Sandstone-Off Peak Electric storage heating | 2 | 450 | 0.1% | 2 | 60% | 40% | |
| Pre-1919-Semi/End Terr’--Cavity Brick-Electric peak room heater | 1 | 450 | 0.1% | 1 | 100% | ||
| Pre-1919-Tenement--Sandstone-Community Heating | 1 | 450 | 0.1% | 1 | 100% | ||
| 1919-1964-Semi/End Terr’--Granite-Oil boiler | 1 | 400 | 0.1% | 2 | 100% | ||
| 1965-1975-Detached--Granite-Oil boiler | 1 | 400 | 0.1% | 1 | 100% | ||
| 1965-1975-Tenement--Timber-Off Peak Electric storage heating | 1 | 400 | 0.1% | 1 | 100% | ||
| 1976-1983-Detached--Timber-Mains Gas boiler | 1 | 400 | 0.1% | 1 | 100% | ||
| Post 1991-Detached-Cavity Brick-Mains Gas boiler | 1 | 400 | 0.1% | 1 | 100% | ||
| Post 1991-Tenement-Cavity Brick-LPG boiler | 1 | 400 | 0.1% | 1 | 100% | ||
| Post 1991-Tower/Slab-Sandstone-Electric peak/off-peak boiler | 1 | 400 | 0.1% | 1 | 100% | ||
| Post 1991-Tower/Slab-System-Off Peak Electric storage heating | 1 | 400 | 0.1% | 1 | 100% |
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