2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 243.7 | 380.7 | 389.6 | 398.5 | 407.7 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 1.9 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 0.3 | 0.9 | 0.9 | 0.9 | 0.9 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 126.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 92.7 | 146.9 | 139.6 | 132.0 | 124.2 | |
Natural Gas – High Efficiency | 10.9 | 180.8 | 194.4 | 208.4 | 223.0 | |
Electric | 4.2 | 43.0 | 45.4 | 47.8 | 50.2 | |
Heat Pump | 1.0 | 2.1 | 2.2 | 2.3 | 2.4 | |
Other1 | 3.5 | 3.0 | 3.0 | 3.0 | 3.0 | |
Wood | 0.8 | 0.5 | 0.5 | 0.4 | 0.4 | |
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 | 1.9 | 3.5 | 3.6 | 3.6 | 3.7 | |
Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 51.9 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 38.1 | 38.6 | 35.8 | 33.1 | 30.5 | |
Natural Gas – High Efficiency | 4.5 | 47.5 | 49.9 | 52.3 | 54.7 | |
Electric | 1.7 | 11.3 | 11.7 | 12.0 | 12.3 | |
Heat Pump | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | |
Other1 | 1.4 | 0.8 | 0.8 | 0.7 | 0.7 | |
Wood | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | |
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 | 0.8 | 0.9 | 0.9 | 0.9 | 0.9 | |
Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |