| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 211.2 | 242.6 | 243.5 | 244.4 | 245.6 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 189.7 | 234.3 | 235.5 | 236.8 | 238.3 | |
| Natural Gas | 0.0 | 3.9 | 3.6 | 3.4 | 3.2 | |
| Heating Oil | 18.2 | 2.5 | 2.5 | 2.4 | 2.3 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.2 | 0.9 | 1.0 | 1.0 | 1.1 | |
| Wood | 3.2 | 1.0 | 0.9 | 0.8 | 0.7 | |
Shares (%) | ||||||
| Electricity | 89.8 | 96.6 | 96.7 | 96.9 | 97.0 | |
| Natural Gas | 0.0 | 1.6 | 1.5 | 1.4 | 1.3 | |
| Heating Oil | 8.6 | 1.0 | 1.0 | 1.0 | 0.9 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.4 | 0.4 | 0.4 | 0.5 | |
| Wood | 1.5 | 0.4 | 0.4 | 0.3 | 0.3 | |
| Total Single Attached Water Heater Stock (thousands) | 15.5 | 24.3 | 24.8 | 25.2 | 25.6 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 13.9 | 23.5 | 23.9 | 24.4 | 24.8 | |
| Natural Gas | 0.0 | 0.4 | 0.4 | 0.4 | 0.3 | |
| Heating Oil | 1.3 | 0.3 | 0.2 | 0.2 | 0.2 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Wood | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | |
Shares (%) | ||||||
| Electricity | 89.8 | 96.6 | 96.7 | 96.9 | 97.0 | |
| Natural Gas | 0.0 | 1.6 | 1.5 | 1.4 | 1.3 | |
| Heating Oil | 8.6 | 1.0 | 1.0 | 1.0 | 0.9 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.4 | 0.4 | 0.4 | 0.5 | |
| Wood | 1.5 | 0.4 | 0.4 | 0.3 | 0.3 | |