2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Heating System Stock (thousands) | 934.6 | 1,113.4 | 1,121.1 | 1,130.2 | 1,139.8 | |
Heating System Stock by Building Type (thousands) | ||||||
Single Detached | 661.9 | 769.0 | 772.5 | 776.4 | 781.1 | |
Single Attached | 62.2 | 85.3 | 86.7 | 88.1 | 89.5 | |
Apartments | 175.0 | 218.2 | 220.8 | 224.3 | 227.5 | |
Mobile Homes | 35.7 | 41.0 | 41.1 | 41.4 | 41.6 | |
Shares (%) | ||||||
Single Detached | 70.8 | 69.1 | 68.9 | 68.7 | 68.5 | |
Single Attached | 6.7 | 7.7 | 7.7 | 7.8 | 7.9 | |
Apartments | 18.7 | 19.6 | 19.7 | 19.8 | 20.0 | |
Mobile Homes | 3.8 | 3.7 | 3.7 | 3.7 | 3.7 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 158.3 | 1.0 | 0.2 | 0.2 | 0.1 | |
Heating Oil – Medium Efficiency | 193.8 | 222.3 | 217.0 | 209.8 | 205.0 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 2.2 | 0.2 | 0.1 | 0.1 | 0.1 | |
Natural Gas – Medium Efficiency | 5.2 | 4.9 | 4.6 | 4.1 | 3.7 | |
Natural Gas – High Efficiency | 5.5 | 21.4 | 22.8 | 24.2 | 25.4 | |
Electric | 340.5 | 634.1 | 645.4 | 658.0 | 668.9 | |
Heat Pump | 20.0 | 38.4 | 39.4 | 40.7 | 41.9 | |
Other1 | 10.3 | 16.0 | 16.1 | 16.4 | 16.8 | |
Wood | 56.4 | 26.6 | 26.4 | 26.4 | 26.6 | |
Dual Systems | ||||||
Wood/Electric | 72.6 | 73.5 | 73.9 | 74.4 | 74.8 | |
Wood/Heating Oil | 65.6 | 68.4 | 68.5 | 69.0 | 69.3 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 4.3 | 6.5 | 6.7 | 6.8 | 6.9 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 16.9 | 0.1 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 20.7 | 20.0 | 19.4 | 18.6 | 18.0 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.6 | 0.4 | 0.4 | 0.4 | 0.3 | |
Natural Gas – High Efficiency | 0.6 | 1.9 | 2.0 | 2.1 | 2.2 | |
Electric | 36.4 | 57.0 | 57.6 | 58.2 | 58.7 | |
Heat Pump | 2.1 | 3.5 | 3.5 | 3.6 | 3.7 | |
Other1 | 1.1 | 1.4 | 1.4 | 1.5 | 1.5 | |
Wood | 6.0 | 2.4 | 2.4 | 2.3 | 2.3 | |
Dual Systems | ||||||
Wood/Electric | 7.8 | 6.6 | 6.6 | 6.6 | 6.6 | |
Wood/Heating Oil | 7.0 | 6.1 | 6.1 | 6.1 | 6.1 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 |