2000 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|
Total Apartment Heating System Stock (thousands) | 518.7 | 749.8 | 772.4 | 797.8 | 823.8 | |
Heating System Stock by Heating System Type (thousands) | ||||||
Heating Oil – Normal Efficiency | 23.0 | 0.3 | 0.4 | 0.4 | 0.3 | |
Heating Oil – Medium Efficiency | 10.5 | 19.9 | 19.1 | 18.5 | 17.8 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 130.7 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 103.4 | 137.7 | 128.3 | 118.7 | 109.2 | |
Natural Gas – High Efficiency | 59.5 | 218.2 | 236.0 | 255.1 | 274.7 | |
Electric | 157.6 | 331.8 | 345.6 | 361.0 | 376.5 | |
Heat Pump | 6.0 | 14.5 | 15.3 | 16.2 | 17.0 | |
Other1 | 9.4 | 6.6 | 6.5 | 6.6 | 6.6 | |
Wood | 15.8 | 16.6 | 16.8 | 17.0 | 17.3 | |
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 | 4.4 | 0.0 | 0.1 | 0.0 | 0.0 | |
Heating Oil – Medium Efficiency | 2.0 | 2.7 | 2.5 | 2.3 | 2.2 | |
Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Normal Efficiency | 25.2 | 0.0 | 0.0 | 0.0 | 0.0 | |
Natural Gas – Medium Efficiency | 19.9 | 18.4 | 16.6 | 14.9 | 13.3 | |
Natural Gas – High Efficiency | 11.5 | 29.1 | 30.6 | 32.0 | 33.3 | |
Electric | 30.4 | 44.2 | 44.7 | 45.2 | 45.7 | |
Heat Pump | 1.2 | 1.9 | 2.0 | 2.0 | 2.1 | |
Other1 | 1.8 | 0.9 | 0.8 | 0.8 | 0.8 | |
Wood | 3.1 | 2.2 | 2.2 | 2.1 | 2.1 | |
Dual Systems | ||||||
Wood/Electric | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | |
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 |