| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Water Heater Stock (thousands) | 377.9 | 446.0 | 449.8 | 453.6 | 458.0 | |
Water Heater Stock by Building Type (thousands) | ||||||
| Single Detached | 255.9 | 290.7 | 292.1 | 293.6 | 295.3 | |
| Single Attached | 23.8 | 32.6 | 33.1 | 33.7 | 34.3 | |
| Apartments | 82.8 | 105.2 | 107.0 | 108.7 | 110.6 | |
| Mobile Homes | 15.5 | 17.5 | 17.6 | 17.7 | 17.8 | |
Shares (%) | ||||||
| Single Detached | 67.7 | 65.2 | 64.9 | 64.7 | 64.5 | |
| Single Attached | 6.3 | 7.3 | 7.4 | 7.4 | 7.5 | |
| Apartments | 21.9 | 23.6 | 23.8 | 24.0 | 24.1 | |
| Mobile Homes | 4.1 | 3.9 | 3.9 | 3.9 | 3.9 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 203.6 | 298.6 | 304.1 | 309.4 | 314.8 | |
| Natural Gas | 0.0 | 3.4 | 3.9 | 4.7 | 5.9 | |
| Heating Oil | 159.7 | 133.3 | 131.2 | 128.9 | 126.8 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.7 | 4.1 | 4.3 | 4.5 | 4.7 | |
| Wood | 13.0 | 6.7 | 6.4 | 6.2 | 5.9 | |
Shares (%) | ||||||
| Electricity | 53.9 | 66.9 | 67.6 | 68.2 | 68.7 | |
| Natural Gas | 0.0 | 0.8 | 0.9 | 1.0 | 1.3 | |
| Heating Oil | 42.3 | 29.9 | 29.2 | 28.4 | 27.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.5 | 0.9 | 0.9 | 1.0 | 1.0 | |
| Wood | 3.4 | 1.5 | 1.4 | 1.4 | 1.3 | |