| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 16.9 | 22.7 | 23.2 | 23.7 | 24.3 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 11.7 | 13.3 | 13.6 | 13.9 | 14.2 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 5.2 | 9.4 | 9.6 | 9.9 | 10.1 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
| Electricity | 69.1 | 58.6 | 58.5 | 58.4 | 58.5 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 30.9 | 41.4 | 41.5 | 41.6 | 41.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Total Single Attached Water Heater Stock (thousands) | 6.2 | 8.8 | 9.0 | 9.3 | 9.5 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 4.3 | 5.2 | 5.3 | 5.4 | 5.6 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 1.9 | 3.6 | 3.7 | 3.8 | 3.9 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
| Electricity | 69.1 | 58.6 | 58.5 | 58.4 | 58.5 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 30.9 | 41.4 | 41.5 | 41.6 | 41.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |