2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 448.9 | 536.8 | 542.6 | 548.6 | 555.5 | |
Heating System Stock by Building Type (thousands) | ||||||
Single Detached | 302.3 | 354.3 | 356.6 | 358.8 | 361.2 | |
Single Attached | 28.8 | 39.2 | 40.4 | 41.5 | 42.7 | |
Apartments | 107.7 | 131.6 | 133.9 | 136.6 | 139.7 | |
Mobile Homes | 10.1 | 11.7 | 11.8 | 11.8 | 11.9 | |
Shares (%) | ||||||
Single Detached | 67.3 | 66.0 | 65.7 | 65.4 | 65.0 | |
Single Attached | 6.4 | 7.3 | 7.4 | 7.6 | 7.7 | |
Apartments | 24.0 | 24.5 | 24.7 | 24.9 | 25.2 | |
Mobile Homes | 2.3 | 2.2 | 2.2 | 2.2 | 2.1 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 3.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 5.7 | 4.3 | 3.7 | 3.1 | 2.5 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 127.1 | 0.1 | 0.1 | 0.1 | 0.0 | |
Natural Gas – Medium Efficiency | 73.3 | 70.9 | 64.8 | 58.9 | 53.3 | |
Natural Gas – High Efficiency | 58.5 | 216.4 | 225.5 | 234.4 | 243.5 | |
Electric | 138.0 | 199.9 | 202.6 | 205.4 | 208.5 | |
Heat Pump | 9.0 | 18.5 | 19.1 | 19.7 | 20.4 | |
Other1 | 4.4 | 2.2 | 2.1 | 2.1 | 2.0 | |
Wood | 10.7 | 1.2 | 1.1 | 1.1 | 1.0 | |
Dual Systems | ||||||
Wood/Electric | 14.9 | 17.9 | 18.1 | 18.3 | 18.5 | |
Wood/Heating Oil | 2.5 | 3.1 | 3.1 | 3.2 | 3.2 | |
Natural Gas/Electric | 0.3 | 0.5 | 0.5 | 0.5 | 0.5 | |
Heating Oil/Electric | 1.1 | 1.8 | 1.9 | 1.9 | 1.9 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 1.3 | 0.8 | 0.7 | 0.6 | 0.4 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 28.3 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 16.3 | 13.2 | 11.9 | 10.7 | 9.6 | |
Natural Gas – High Efficiency | 13.0 | 40.3 | 41.6 | 42.7 | 43.8 | |
Electric | 30.7 | 37.2 | 37.3 | 37.4 | 37.5 | |
Heat Pump | 2.0 | 3.4 | 3.5 | 3.6 | 3.7 | |
Other1 | 1.0 | 0.4 | 0.4 | 0.4 | 0.4 | |
Wood | 2.4 | 0.2 | 0.2 | 0.2 | 0.2 | |
Dual Systems | ||||||
Wood/Electric | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | |
Wood/Heating Oil | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | |
Natural Gas/Electric | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
Heating Oil/Electric | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |