2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartments Heating System Stock (thousands) | 512.9 | 740.2 | 762.7 | 787.9 | 813.7 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 21.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 8.7 | 14.0 | 13.2 | 12.4 | 11.5 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 130.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 103.0 | 137.1 | 127.7 | 118.2 | 108.7 | |
Natural Gas – High Efficiency | 59.3 | 217.1 | 234.8 | 253.8 | 273.3 | |
Electric | 157.4 | 331.5 | 345.4 | 360.7 | 376.2 | |
Heat Pump | 6.0 | 14.5 | 15.3 | 16.2 | 17.0 | |
Other1 | 8.9 | 5.7 | 5.7 | 5.6 | 5.7 | |
Wood | 15.5 | 16.1 | 16.3 | 16.5 | 16.7 | |
Dual Systems | ||||||
Wood/Electric | 1.9 | 2.7 | 2.8 | 2.8 | 2.9 | |
Wood/Heating Oil | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | |
Natural Gas/Electric | 0.6 | 1.2 | 1.3 | 1.3 | 1.3 | |
Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
Heating Oil – Normal Efficiency | 4.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 1.7 | 1.9 | 1.7 | 1.6 | 1.4 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 25.4 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 20.1 | 18.5 | 16.7 | 15.0 | 13.4 | |
Natural Gas – High Efficiency | 11.6 | 29.3 | 30.8 | 32.2 | 33.6 | |
Electric | 30.7 | 44.8 | 45.3 | 45.8 | 46.2 | |
Heat Pump | 1.2 | 2.0 | 2.0 | 2.0 | 2.1 | |
Other1 | 1.7 | 0.8 | 0.7 | 0.7 | 0.7 | |
Wood | 3.0 | 2.2 | 2.1 | 2.1 | 2.1 | |
Dual Systems | ||||||
Wood/Electric | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | |
Wood/Heating Oil | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas/Electric | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | |
Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |