2000 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|
Total Single Detached Heating System Stock (thousands) | 6,843 | 8,188 | 8,246 | 8,320 | 8,398 | 8,479 | 8,567 | |
Heating System Stock by Heating System Type (thousands) | ||||||||
Heating Oil – Normal Efficiency | 189 | 1 | 1 | 1 | 1 | 1 | 0 | |
Heating Oil – Medium Efficiency | 418 | 427 | 401 | 372 | 347 | 318 | 292 | |
Heating Oil – High Efficiency | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Natural Gas – Normal Efficiency | 1,553 | 0 | 0 | 0 | 0 | 0 | 0 | |
Natural Gas – Medium Efficiency | 1,090 | 1,357 | 1,271 | 1,182 | 1,094 | 1,006 | 920 | |
Natural Gas – High Efficiency | 624 | 2,382 | 2,481 | 2,594 | 2,717 | 2,842 | 2,966 | |
Electric | 1,538 | 2,174 | 2,213 | 2,253 | 2,279 | 2,307 | 2,336 | |
Heat Pump | 350 | 612 | 628 | 646 | 667 | 689 | 712 | |
Other1 | 76 | 114 | 120 | 128 | 133 | 138 | 144 | |
Wood | 52 | 2 | 2 | 1 | 1 | 1 | 1 | |
Dual Systems | ||||||||
Wood/Electric | 557 | 630 | 635 | 642 | 650 | 659 | 668 | |
Wood/Heating Oil | 260 | 295 | 298 | 300 | 303 | 307 | 311 | |
Natural Gas/Electric | 39 | 58 | 59 | 60 | 61 | 62 | 64 | |
Heating Oil/Electric | 96 | 136 | 138 | 141 | 144 | 148 | 151 | |
Shares (%) | ||||||||
Heating Oil – Normal Efficiency | 2.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 6.1 | 5.2 | 4.9 | 4.5 | 4.1 | 3.8 | 3.4 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 22.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 15.9 | 16.6 | 15.4 | 14.2 | 13.0 | 11.9 | 10.7 | |
Natural Gas – High Efficiency | 9.1 | 29.1 | 30.1 | 31.2 | 32.4 | 33.5 | 34.6 | |
Electric | 22.5 | 26.6 | 26.8 | 27.1 | 27.1 | 27.2 | 27.3 | |
Heat Pump | 5.1 | 7.5 | 7.6 | 7.8 | 7.9 | 8.1 | 8.3 | |
Other1 | 1.1 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | |
Wood | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | ||||||||
Wood/Electric | 8.1 | 7.7 | 7.7 | 7.7 | 7.7 | 7.8 | 7.8 | |
Wood/Heating Oil | 3.8 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | |
Natural Gas/Electric | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | |
Heating Oil/Electric | 1.4 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.8 |