| 1990 | 2015 | 2016 | 2017 | ||
|---|---|---|---|---|---|
| Total Mobile Homes Heating System Stock (thousands) | 40.4 | 67.1 | 67.8 | 69.3 | |
Heating System Stock by Heating System Type (thousands) | |||||
| Heating Oil – Normal Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil – Medium Efficiency | 0.0 | 0.4 | 0.4 | 0.4 | |
| Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Natural Gas – Normal Efficiency | 36.1 | 0.0 | 0.0 | 0.0 | |
| Natural Gas – Medium Efficiency | 0.0 | 55.6 | 56.2 | 57.4 | |
| Natural Gas – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Electric | 0.6 | 2.5 | 2.4 | 2.5 | |
| Heat Pump | 0.8 | 4.3 | 4.4 | 4.6 | |
| Other1 | 0.8 | 0.7 | 0.7 | 0.7 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||
| Wood/Electric | 0.4 | 0.8 | 0.8 | 0.8 | |
| Wood/Heating Oil | 1.6 | 2.8 | 2.8 | 2.8 | |
| Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | |||||
| Heating Oil – Normal Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil – Medium Efficiency | 0.1 | 0.6 | 0.6 | 0.6 | |
| Heating Oil – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Natural Gas – Normal Efficiency | 89.4 | 0.0 | 0.0 | 0.0 | |
| Natural Gas – Medium Efficiency | 0.0 | 82.9 | 82.9 | 82.8 | |
| Natural Gas – High Efficiency | 0.0 | 0.0 | 0.0 | 0.0 | |
| Electric | 1.5 | 3.7 | 3.6 | 3.6 | |
| Heat Pump | 2.0 | 6.4 | 6.5 | 6.6 | |
| Other1 | 2.1 | 1.1 | 1.1 | 1.1 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | |
Dual Systems | |||||
| Wood/Electric | 1.1 | 1.2 | 1.2 | 1.2 | |
| Wood/Heating Oil | 3.9 | 4.1 | 4.1 | 4.1 | |
| Natural Gas/Electric | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil/Electric | 0.0 | 0.0 | 0.0 | 0.0 | |