| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 293.9 | 342.3 | 343.4 | 344.4 | 345.8 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 58.7 | 56.8 | 57.3 | 57.7 | 58.3 | |
| Natural Gas | 229.8 | 280.1 | 280.7 | 281.1 | 281.9 | |
| Heating Oil | 3.0 | 1.5 | 1.4 | 1.4 | 1.3 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.3 | 3.5 | 3.7 | 3.9 | 4.2 | |
| Wood | 1.1 | 0.4 | 0.3 | 0.2 | 0.1 | |
Shares (%) | ||||||
| Electricity | 20.0 | 16.6 | 16.7 | 16.8 | 16.9 | |
| Natural Gas | 78.2 | 81.9 | 81.7 | 81.6 | 81.5 | |
| Heating Oil | 1.0 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.5 | 1.0 | 1.1 | 1.1 | 1.2 | |
| Wood | 0.4 | 0.1 | 0.1 | 0.1 | 0.0 | |
| Total Single Attached Water Heater Stock (thousands) | 22.0 | 36.9 | 37.3 | 37.7 | 38.3 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 4.4 | 6.1 | 6.2 | 6.3 | 6.5 | |
| Natural Gas | 17.2 | 30.2 | 30.5 | 30.8 | 31.2 | |
| Heating Oil | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.4 | 0.4 | 0.4 | 0.5 | |
| Wood | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
| Electricity | 20.0 | 16.6 | 16.7 | 16.8 | 16.9 | |
| Natural Gas | 78.2 | 81.9 | 81.7 | 81.6 | 81.5 | |
| Heating Oil | 1.0 | 0.4 | 0.4 | 0.4 | 0.4 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.5 | 1.0 | 1.1 | 1.1 | 1.2 | |
| Wood | 0.4 | 0.1 | 0.1 | 0.1 | 0.0 | |