| 1990 | 2015 | 2016 | 2017 | ||
|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 222.9 | 288.0 | 288.9 | 291.5 | |
Water Heater Stock by Energy Source (thousands) | |||||
| Electricity | 121.8 | 143.7 | 144.0 | 145.1 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 86.6 | 136.3 | 136.9 | 138.3 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 11.2 | 0.9 | 0.9 | 0.9 | |
| Wood | 3.3 | 7.1 | 7.2 | 7.1 | |
Shares (%) | |||||
| Electricity | 54.7 | 49.9 | 49.8 | 49.8 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 38.8 | 47.3 | 47.4 | 47.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 5.0 | 0.3 | 0.3 | 0.3 | |
| Wood | 1.5 | 2.5 | 2.5 | 2.5 | |
| Total Single Attached Water Heater Stock (thousands) | 19.1 | 31.2 | 31.6 | 32.5 | |
Water Heater Stock by Energy Source (thousands) | |||||
| Electricity | 10.4 | 15.6 | 15.8 | 16.2 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 7.4 | 14.8 | 15.0 | 15.4 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.0 | 0.1 | 0.1 | 0.1 | |
| Wood | 0.3 | 0.8 | 0.8 | 0.8 | |
Shares (%) | |||||
| Electricity | 54.7 | 49.9 | 49.8 | 49.8 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 38.8 | 47.3 | 47.4 | 47.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 5.0 | 0.3 | 0.3 | 0.3 | |
| Wood | 1.5 | 2.5 | 2.5 | 2.5 | |