| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Water Heater Stock (thousands) | 448.9 | 536.8 | 542.6 | 548.6 | 555.5 | |
Water Heater Stock by Building Type (thousands) | ||||||
| Single Detached | 302.3 | 354.3 | 356.6 | 358.8 | 361.2 | |
| Single Attached | 28.8 | 39.2 | 40.4 | 41.5 | 42.7 | |
| Apartments | 107.7 | 131.6 | 133.9 | 136.6 | 139.7 | |
| Mobile Homes | 10.1 | 11.7 | 11.8 | 11.8 | 11.9 | |
Shares (%) | ||||||
| Single Detached | 67.3 | 66.0 | 65.7 | 65.4 | 65.0 | |
| Single Attached | 6.4 | 7.3 | 7.4 | 7.6 | 7.7 | |
| Apartments | 24.0 | 24.5 | 24.7 | 24.9 | 25.2 | |
| Mobile Homes | 2.3 | 2.2 | 2.2 | 2.2 | 2.1 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 203.4 | 308.8 | 313.4 | 318.1 | 323.3 | |
| Natural Gas | 240.7 | 226.8 | 228.1 | 229.4 | 231.1 | |
| Heating Oil | 1.1 | 0.3 | 0.2 | 0.2 | 0.2 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.3 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Wood | 2.4 | 0.9 | 0.8 | 0.8 | 0.8 | |
Shares (%) | ||||||
| Electricity | 45.3 | 57.5 | 57.8 | 58.0 | 58.2 | |
| Natural Gas | 53.6 | 42.2 | 42.0 | 41.8 | 41.6 | |
| Heating Oil | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.5 | 0.2 | 0.2 | 0.1 | 0.1 | |