| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Water Heater Stock (thousands) | 31.6 | 44.1 | 45.1 | 46.1 | 47.1 | |
Water Heater Stock by Building Type (thousands) | ||||||
| Single Detached | 16.9 | 22.7 | 23.2 | 23.7 | 24.3 | |
| Single Attached | 6.2 | 8.8 | 9.0 | 9.3 | 9.5 | |
| Apartments | 5.8 | 9.5 | 9.7 | 9.9 | 10.1 | |
| Mobile Homes | 2.8 | 3.2 | 3.2 | 3.2 | 3.2 | |
Shares (%) | ||||||
| Single Detached | 53.5 | 51.3 | 51.4 | 51.4 | 51.5 | |
| Single Attached | 19.5 | 19.9 | 20.0 | 20.1 | 20.1 | |
| Apartments | 18.3 | 21.6 | 21.6 | 21.5 | 21.5 | |
| Mobile Homes | 8.8 | 7.2 | 7.1 | 6.9 | 6.8 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 21.8 | 25.9 | 26.4 | 26.9 | 27.6 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 9.8 | 18.3 | 18.7 | 19.2 | 19.6 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
Shares (%) | ||||||
| Electricity | 69.1 | 58.6 | 58.5 | 58.4 | 58.5 | |
| Natural Gas | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Heating Oil | 30.9 | 41.4 | 41.5 | 41.6 | 41.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Wood | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |