| 2000 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|---|
| Total Space Heating Energy Use (PJ) | 883.6 | 922.8 | 962.2 | 953.6 | 873.8 | 840.4 | |
Energy Use by Vintage (PJ) | |||||||
| Before 1946 | 213.4 | 175.9 | 180.7 | 175.7 | 156.6 | 147.5 | |
| 1946–1960 | 105.3 | 91.4 | 94.4 | 92.4 | 83.2 | 78.7 | |
| 1961–1977 | 203.5 | 168.9 | 174.7 | 171.7 | 155.9 | 148.2 | |
| 1978–1983 | 121.7 | 102.7 | 105.8 | 103.9 | 94.8 | 90.4 | |
| 1984–1995 | 187.8 | 160.0 | 164.5 | 161.1 | 146.2 | 139.6 | |
| 1996–2000 | 51.9 | 48.4 | 50.0 | 49.2 | 45.1 | 43.1 | |
| 2001–2005 | 0.0 | 61.3 | 63.4 | 62.3 | 56.9 | 54.3 | |
| 2006–2010 | 0.0 | 52.4 | 54.3 | 53.6 | 49.1 | 47.1 | |
| 2011–2015 | 0.0 | 44.8 | 46.5 | 46.1 | 42.3 | 40.5 | |
| 2016–2020 | 0.0 | 17.1 | 27.9 | 37.5 | 43.7 | 42.0 | |
| 2021–2025 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | |
Shares (%) | |||||||
| Before 1946 | 24.2 | 19.1 | 18.8 | 18.4 | 17.9 | 17.5 | |
| 1946–1960 | 11.9 | 9.9 | 9.8 | 9.7 | 9.5 | 9.4 | |
| 1961–1977 | 23.0 | 18.3 | 18.2 | 18.0 | 17.8 | 17.6 | |
| 1978–1983 | 13.8 | 11.1 | 11.0 | 10.9 | 10.8 | 10.8 | |
| 1984–1995 | 21.3 | 17.3 | 17.1 | 16.9 | 16.7 | 16.6 | |
| 1996–2000 | 5.9 | 5.2 | 5.2 | 5.2 | 5.2 | 5.1 | |
| 2001–2005 | 0.0 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | |
| 2006–2010 | 0.0 | 5.7 | 5.6 | 5.6 | 5.6 | 5.6 | |
| 2011–2015 | 0.0 | 4.9 | 4.8 | 4.8 | 4.8 | 4.8 | |
| 2016–2020 | 0.0 | 1.9 | 2.9 | 3.9 | 5.0 | 5.0 | |
| 2021–2025 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | |
Activity | |||||||
| Total Floor Space (million m2) | 1,500 | 2,085 | 2,125 | 2,165 | 2,205 | 2,247 | |
| Energy Intensity (GJ/m2) | 0.59 | 0.44 | 0.45 | 0.44 | 0.40 | 0.37 | |
| Total Space Heating GHG Emissions Including Electricity (Mt of CO2e) | 46.2 | 40.9 | 41.9 | 41.3 | 36.9 | 35.2 | |
GHG Emissions by Vintage (Mt of CO2e) | |||||||
| Before 1946 | 11.3 | 7.7 | 7.7 | 7.5 | 6.5 | 6.0 | |
| 1946–1960 | 5.5 | 4.0 | 4.1 | 4.0 | 3.5 | 3.3 | |
| 1961–1977 | 10.6 | 7.5 | 7.7 | 7.5 | 6.6 | 6.3 | |
| 1978–1983 | 6.3 | 4.6 | 4.7 | 4.5 | 4.1 | 3.8 | |
| 1984–1995 | 9.8 | 7.1 | 7.2 | 7.0 | 6.2 | 5.8 | |
| 1996–2000 | 2.7 | 2.2 | 2.2 | 2.1 | 1.9 | 1.8 | |
| 2001–2005 | 0.0 | 2.7 | 2.8 | 2.7 | 2.4 | 2.3 | |
| 2006–2010 | 0.0 | 2.3 | 2.4 | 2.3 | 2.1 | 2.0 | |
| 2011–2015 | 0.0 | 2.0 | 2.0 | 2.0 | 1.8 | 1.7 | |
| 2016–2020 | 0.0 | 0.8 | 1.2 | 1.6 | 1.9 | 1.8 | |
| 2021–2025 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | |
| GHG Intensity (tonne/TJ) | 52.3 | 44.3 | 43.6 | 43.3 | 42.2 | 41.9 | |
| Total Space Heating GHG Emissions Excluding Electricity (Mt of CO2e) | 35.1 | 31.3 | 32.8 | 31.9 | 28.9 | 27.5 | |
GHG Emissions by Vintage (Mt of CO2e) | |||||||
| Before 1946 | 8.3 | 5.6 | 5.8 | 5.5 | 4.9 | 4.5 | |
| 1946–1960 | 4.1 | 3.0 | 3.1 | 3.0 | 2.6 | 2.5 | |
| 1961–1977 | 8.2 | 5.8 | 6.1 | 5.9 | 5.3 | 5.0 | |
| 1978–1983 | 5.0 | 3.6 | 3.7 | 3.6 | 3.3 | 3.1 | |
| 1984–1995 | 7.4 | 5.4 | 5.6 | 5.4 | 4.8 | 4.6 | |
| 1996–2000 | 2.1 | 1.7 | 1.7 | 1.7 | 1.5 | 1.4 | |
| 2001–2005 | 0.0 | 2.2 | 2.2 | 2.2 | 2.0 | 1.9 | |
| 2006–2010 | 0.0 | 1.8 | 1.9 | 1.8 | 1.7 | 1.6 | |
| 2011–2015 | 0.0 | 1.5 | 1.6 | 1.6 | 1.4 | 1.4 | |
| 2016–2020 | 0.0 | 0.6 | 1.0 | 1.3 | 1.5 | 1.4 | |
| 2021–2025 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | |
| GHG Intensity (tonne/TJ) | 39.8 | 33.9 | 34.1 | 33.5 | 33.1 | 32.8 | |
| Heating Degree-Day Index | 0.96 | 0.92 | 0.95 | 0.98 | 0.88 | 0.85 | |