2000 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 12,200 | 14,622 | 14,791 | 14,971 | 15,143 | 15,317 | 15,520 | 15,722 | 15,944 | 16,186 | |
Heating System Stock by Building Type (thousands) | |||||||||||
Single Detached | 6,843 | 8,018 | 8,080 | 8,135 | 8,188 | 8,246 | 8,320 | 8,398 | 8,479 | 8,567 | |
Single Attached | 1,285 | 1,715 | 1,748 | 1,779 | 1,811 | 1,845 | 1,882 | 1,915 | 1,950 | 1,987 | |
Apartments | 3,839 | 4,622 | 4,694 | 4,786 | 4,872 | 4,952 | 5,042 | 5,131 | 5,235 | 5,350 | |
Mobile Homes | 233 | 267 | 269 | 271 | 272 | 274 | 276 | 278 | 280 | 282 | |
Shares (%) | |||||||||||
Single Detached | 56.1 | 54.8 | 54.6 | 54.3 | 54.1 | 53.8 | 53.6 | 53.4 | 53.2 | 52.9 | |
Single Attached | 10.5 | 11.7 | 11.8 | 11.9 | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.3 | |
Apartments | 31.5 | 31.6 | 31.7 | 32.0 | 32.2 | 32.3 | 32.5 | 32.6 | 32.8 | 33.1 | |
Mobile Homes | 1.9 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.7 | |
Heating System Stock by Heating System Type (thousands) | |||||||||||
Heating Oil – Normal Efficiency | 458 | 13 | 10 | 8 | 6 | 4 | 3 | 2 | 2 | 1 | |
Heating Oil – Medium Efficiency | 769 | 908 | 883 | 851 | 811 | 766 | 713 | 663 | 606 | 552 | |
Heating Oil – High Efficiency | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Natural Gas – Normal Efficiency | 2,748 | 181 | 106 | 52 | 24 | 9 | 2 | 1 | 1 | 0 | |
Natural Gas – Medium Efficiency | 1,855 | 2,779 | 2,692 | 2,583 | 2,454 | 2,311 | 2,161 | 2,012 | 1,864 | 1,719 | |
Natural Gas – High Efficiency | 1,072 | 3,727 | 3,947 | 4,178 | 4,393 | 4,606 | 4,836 | 5,077 | 5,326 | 5,581 | |
Electric | 3,405 | 4,704 | 4,820 | 4,938 | 5,062 | 5,187 | 5,318 | 5,426 | 5,545 | 5,669 | |
Heat Pump | 414 | 691 | 708 | 725 | 743 | 763 | 787 | 813 | 841 | 871 | |
Other1 | 129 | 183 | 191 | 201 | 212 | 226 | 244 | 254 | 265 | 278 | |
Wood | 271 | 179 | 169 | 160 | 152 | 144 | 138 | 136 | 134 | 133 | |
Dual Systems | |||||||||||
Wood/Electric | 603 | 673 | 676 | 680 | 684 | 691 | 698 | 708 | 717 | 728 | |
Wood/Heating Oil | 286 | 324 | 324 | 326 | 327 | 330 | 333 | 336 | 341 | 345 | |
Natural Gas/Electric | 53 | 77 | 78 | 79 | 81 | 82 | 84 | 86 | 88 | 90 | |
Heating Oil/Electric | 136 | 185 | 188 | 191 | 195 | 199 | 203 | 208 | 214 | 219 | |
Shares (%) | |||||||||||
Heating Oil – Normal Efficiency | 3.8 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 6.3 | 6.2 | 6.0 | 5.7 | 5.4 | 5.0 | 4.6 | 4.2 | 3.8 | 3.4 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 22.5 | 1.2 | 0.7 | 0.4 | 0.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 15.2 | 19.0 | 18.2 | 17.3 | 16.2 | 15.1 | 13.9 | 12.8 | 11.7 | 10.6 | |
Natural Gas – High Efficiency | 8.8 | 25.5 | 26.7 | 27.9 | 29.0 | 30.1 | 31.2 | 32.3 | 33.4 | 34.5 | |
Electric | 27.9 | 32.2 | 32.6 | 33.0 | 33.4 | 33.9 | 34.3 | 34.5 | 34.8 | 35.0 | |
Heat Pump | 3.4 | 4.7 | 4.8 | 4.8 | 4.9 | 5.0 | 5.1 | 5.2 | 5.3 | 5.4 | |
Other1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.6 | 1.6 | 1.7 | 1.7 | |
Wood | 2.2 | 1.2 | 1.1 | 1.1 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | |
Dual Systems | |||||||||||
Wood/Electric | 4.9 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | |
Wood/Heating Oil | 2.3 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.1 | 2.1 | 2.1 | 2.1 | |
Natural Gas/Electric | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | |
Heating Oil/Electric | 1.1 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | 1.4 |