2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 107.7 | 131.6 | 133.9 | 136.6 | 139.7 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 1.7 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 0.9 | 1.3 | 1.2 | 1.1 | 1.0 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 31.7 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 17.1 | 16.1 | 14.6 | 13.2 | 11.8 | |
Natural Gas – High Efficiency | 14.2 | 55.9 | 58.6 | 61.4 | 64.5 | |
Electric | 35.9 | 53.8 | 54.9 | 56.1 | 57.6 | |
Heat Pump | 1.3 | 3.0 | 3.1 | 3.2 | 3.4 | |
Other1 | 1.0 | 0.5 | 0.5 | 0.5 | 0.5 | |
Wood | 3.9 | 0.9 | 0.9 | 0.8 | 0.8 | |
Dual Systems | ||||||
Wood/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Wood/Heating Oil | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 1.6 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 0.8 | 1.0 | 0.9 | 0.8 | 0.7 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 29.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 15.9 | 12.3 | 10.9 | 9.7 | 8.4 | |
Natural Gas – High Efficiency | 13.1 | 42.5 | 43.8 | 45.0 | 46.2 | |
Electric | 33.3 | 40.9 | 41.0 | 41.1 | 41.2 | |
Heat Pump | 1.3 | 2.3 | 2.3 | 2.4 | 2.4 | |
Other1 | 1.0 | 0.4 | 0.4 | 0.4 | 0.4 | |
Wood | 3.6 | 0.7 | 0.7 | 0.6 | 0.6 | |
Dual Systems | ||||||
Wood/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Wood/Heating Oil | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 |