| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 1,443.8 | 1,721.5 | 1,728.0 | 1,734.6 | 1,745.4 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 1,272.4 | 1,639.7 | 1,647.8 | 1,655.9 | 1,667.8 | |
| Natural Gas | 80.5 | 62.9 | 62.9 | 62.9 | 63.1 | |
| Heating Oil | 85.5 | 13.9 | 12.4 | 11.0 | 9.9 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.2 | 1.5 | 1.6 | 1.7 | 1.8 | |
| Wood | 5.1 | 3.5 | 3.3 | 3.1 | 2.9 | |
Shares (%) | ||||||
| Electricity | 88.1 | 95.2 | 95.4 | 95.5 | 95.6 | |
| Natural Gas | 5.6 | 3.7 | 3.6 | 3.6 | 3.6 | |
| Heating Oil | 5.9 | 0.8 | 0.7 | 0.6 | 0.6 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Wood | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 | |
| Total Single Attached Water Heater Stock (thousands) | 236.6 | 323.5 | 328.2 | 333.1 | 339.0 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 208.5 | 308.1 | 313.0 | 318.0 | 323.9 | |
| Natural Gas | 13.2 | 11.8 | 12.0 | 12.1 | 12.2 | |
| Heating Oil | 14.0 | 2.6 | 2.3 | 2.1 | 1.9 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | |
| Wood | 0.8 | 0.7 | 0.6 | 0.6 | 0.6 | |
Shares (%) | ||||||
| Electricity | 88.1 | 95.2 | 95.4 | 95.5 | 95.6 | |
| Natural Gas | 5.6 | 3.7 | 3.6 | 3.6 | 3.6 | |
| Heating Oil | 5.9 | 0.8 | 0.7 | 0.6 | 0.6 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Wood | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 | |