| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 886.2 | 1,021.2 | 1,028.8 | 1,035.3 | 1,042.8 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 366.3 | 434.7 | 440.4 | 445.7 | 451.5 | |
| Natural Gas | 491.7 | 562.6 | 564.2 | 565.1 | 566.4 | |
| Heating Oil | 17.0 | 13.1 | 13.1 | 13.1 | 13.2 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 4.3 | 7.1 | 7.5 | 7.8 | 8.2 | |
| Wood | 6.9 | 3.7 | 3.6 | 3.6 | 3.6 | |
Shares (%) | ||||||
| Electricity | 41.3 | 42.6 | 42.8 | 43.1 | 43.3 | |
| Natural Gas | 55.5 | 55.1 | 54.8 | 54.6 | 54.3 | |
| Heating Oil | 1.9 | 1.3 | 1.3 | 1.3 | 1.3 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.5 | 0.7 | 0.7 | 0.8 | 0.8 | |
| Wood | 0.8 | 0.4 | 0.4 | 0.3 | 0.3 | |
| Total Single Attached Water Heater Stock (thousands) | 174.1 | 264.7 | 269.9 | 275.3 | 281.9 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 72.8 | 113.1 | 116.0 | 119.0 | 122.5 | |
| Natural Gas | 95.0 | 144.2 | 146.4 | 148.6 | 151.5 | |
| Heating Oil | 4.2 | 4.6 | 4.6 | 4.7 | 4.8 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.8 | 1.8 | 1.9 | 2.1 | 2.2 | |
| Wood | 1.3 | 1.0 | 0.9 | 0.9 | 1.0 | |
Shares (%) | ||||||
| Electricity | 41.8 | 42.7 | 43.0 | 43.2 | 43.5 | |
| Natural Gas | 54.6 | 54.5 | 54.2 | 54.0 | 53.7 | |
| Heating Oil | 2.4 | 1.7 | 1.7 | 1.7 | 1.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.5 | 0.7 | 0.7 | 0.7 | 0.8 | |
| Wood | 0.8 | 0.4 | 0.3 | 0.3 | 0.3 | |