2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 54.7 | 67.4 | 68.0 | 69.2 | 69.9 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 6.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 6.2 | 5.9 | 5.3 | 4.8 | 4.2 | |
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 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | |
Natural Gas – High Efficiency | 0.4 | 1.8 | 1.9 | 2.0 | 2.2 | |
Electric | 30.3 | 49.8 | 50.8 | 52.2 | 53.1 | |
Heat Pump | 0.6 | 1.3 | 1.4 | 1.5 | 1.5 | |
Other1 | 0.2 | 0.9 | 0.9 | 0.9 | 0.9 | |
Wood | 9.8 | 6.8 | 6.8 | 7.0 | 7.2 | |
Dual Systems | ||||||
Wood/Electric | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | |
Wood/Heating Oil | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 11.2 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 11.4 | 8.7 | 7.8 | 6.9 | 6.0 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 0.6 | 0.4 | 0.3 | 0.3 | 0.3 | |
Natural Gas – High Efficiency | 0.6 | 2.6 | 2.8 | 2.9 | 3.1 | |
Electric | 55.3 | 73.9 | 74.7 | 75.4 | 76.0 | |
Heat Pump | 1.1 | 2.0 | 2.1 | 2.1 | 2.2 | |
Other1 | 0.3 | 1.4 | 1.3 | 1.3 | 1.2 | |
Wood | 18.0 | 10.1 | 10.1 | 10.1 | 10.3 | |
Dual Systems | ||||||
Wood/Electric | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
Wood/Heating Oil | 0.6 | 0.5 | 0.5 | 0.5 | 0.5 | |
Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil/Electric | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 |