2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 74.2 | 96.1 | 97.4 | 98.2 | 99.3 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 2.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 1.6 | 1.8 | 1.7 | 1.5 | 1.3 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 37.4 | 1.2 | 0.7 | 0.4 | 0.1 | |
Natural Gas – Medium Efficiency | 15.1 | 19.1 | 18.0 | 16.8 | 15.6 | |
Natural Gas – High Efficiency | 12.4 | 61.0 | 63.3 | 65.2 | 67.4 | |
Electric | 2.5 | 11.3 | 11.9 | 12.5 | 13.2 | |
Heat Pump | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Other1 | 1.3 | 1.3 | 1.3 | 1.3 | 1.3 | |
Wood | 1.5 | 0.6 | 0.5 | 0.5 | 0.5 | |
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 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 3.2 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 2.1 | 1.9 | 1.7 | 1.5 | 1.3 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 50.4 | 1.2 | 0.7 | 0.4 | 0.1 | |
Natural Gas – Medium Efficiency | 20.3 | 19.9 | 18.4 | 17.1 | 15.7 | |
Natural Gas – High Efficiency | 16.7 | 63.4 | 65.0 | 66.4 | 67.9 | |
Electric | 3.3 | 11.7 | 12.2 | 12.8 | 13.3 | |
Heat Pump | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Other1 | 1.7 | 1.3 | 1.3 | 1.3 | 1.3 | |
Wood | 2.0 | 0.6 | 0.5 | 0.5 | 0.5 | |
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 | 0.0 | 0.0 | 0.0 | 0.0 |