2000 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 1,609.6 | 2,029.1 | 2,063.1 | 2,098.5 | 2,136.0 | 2,176.1 | |
Heating System Stock by Building Type (thousands) | |||||||
Single Detached | 869.3 | 991.1 | 998.5 | 1,005.6 | 1,011.6 | 1,018.6 | |
Single Attached | 167.9 | 250.8 | 255.9 | 260.9 | 266.0 | 272.4 | |
Apartments | 512.9 | 719.2 | 740.2 | 762.7 | 787.9 | 813.7 | |
Mobile Homes | 59.4 | 68.0 | 68.5 | 69.4 | 70.4 | 71.4 | |
Shares (%) | |||||||
Single Detached | 54.0 | 48.8 | 48.4 | 47.9 | 47.4 | 46.8 | |
Single Attached | 10.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | |
Apartments | 31.9 | 35.4 | 35.9 | 36.3 | 36.9 | 37.4 | |
Mobile Homes | 3.7 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | |
Heating System Stock by Heating System Type (thousands) | |||||||
Heating Oil – Normal Efficiency | 43.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 27.4 | 46.5 | 44.3 | 41.9 | 39.3 | 36.5 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 402.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 312.4 | 424.0 | 398.5 | 372.6 | 346.4 | 320.8 | |
Natural Gas – High Efficiency | 169.1 | 503.0 | 531.2 | 566.4 | 602.7 | 640.9 | |
Electric | 459.9 | 799.9 | 830.2 | 854.0 | 878.8 | 904.3 | |
Heat Pump | 37.2 | 70.0 | 72.3 | 74.7 | 77.4 | 80.0 | |
Other1 | 27.4 | 15.7 | 14.9 | 14.7 | 14.4 | 14.2 | |
Wood | 21.1 | 22.5 | 22.3 | 22.4 | 22.7 | 23.0 | |
Dual Systems | |||||||
Wood/Electric | 65.0 | 84.9 | 86.0 | 87.2 | 88.5 | 89.7 | |
Wood/Heating Oil | 25.2 | 33.0 | 33.4 | 33.9 | 34.4 | 34.9 | |
Natural Gas/Electric | 13.4 | 20.0 | 20.3 | 20.7 | 21.1 | 21.5 | |
Heating Oil/Electric | 6.1 | 9.6 | 9.8 | 10.0 | 10.2 | 10.4 | |
Shares (%) | |||||||
Heating Oil – Normal Efficiency | 2.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 1.7 | 2.3 | 2.1 | 2.0 | 1.8 | 1.7 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 25.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 19.4 | 20.9 | 19.3 | 17.8 | 16.2 | 14.7 | |
Natural Gas – High Efficiency | 10.5 | 24.8 | 25.7 | 27.0 | 28.2 | 29.5 | |
Electric | 28.6 | 39.4 | 40.2 | 40.7 | 41.1 | 41.6 | |
Heat Pump | 2.3 | 3.5 | 3.5 | 3.6 | 3.6 | 3.7 | |
Other1 | 1.7 | 0.8 | 0.7 | 0.7 | 0.7 | 0.7 | |
Wood | 1.3 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | |
Dual Systems | |||||||
Wood/Electric | 4.0 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 | |
Wood/Heating Oil | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | |
Natural Gas/Electric | 0.8 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | |
Heating Oil/Electric | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |