| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 661.9 | 769.0 | 772.5 | 776.4 | 781.1 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 468.7 | 630.6 | 636.8 | 643.1 | 649.9 | |
| Natural Gas | 0.0 | 6.1 | 6.2 | 6.5 | 7.0 | |
| Heating Oil | 174.9 | 122.2 | 119.6 | 117.0 | 114.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.6 | 3.7 | 3.8 | 4.0 | 4.2 | |
| Wood | 16.6 | 6.4 | 6.0 | 5.7 | 5.4 | |
Shares (%) | ||||||
| Electricity | 70.8 | 82.0 | 82.4 | 82.8 | 83.2 | |
| Natural Gas | 0.0 | 0.8 | 0.8 | 0.8 | 0.9 | |
| Heating Oil | 26.4 | 15.9 | 15.5 | 15.1 | 14.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.2 | 0.5 | 0.5 | 0.5 | 0.5 | |
| Wood | 2.5 | 0.8 | 0.8 | 0.7 | 0.7 | |
| Total Single Attached Water Heater Stock (thousands) | 62.2 | 85.3 | 86.7 | 88.1 | 89.5 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 44.1 | 69.6 | 71.1 | 72.6 | 74.0 | |
| Natural Gas | 0.0 | 0.6 | 0.7 | 0.7 | 0.8 | |
| Heating Oil | 16.4 | 14.0 | 13.8 | 13.7 | 13.6 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.4 | 0.4 | 0.5 | 0.5 | |
| Wood | 1.5 | 0.7 | 0.7 | 0.7 | 0.6 | |
Shares (%) | ||||||
| Electricity | 70.9 | 81.6 | 82.0 | 82.3 | 82.7 | |
| Natural Gas | 0.0 | 0.7 | 0.8 | 0.8 | 0.9 | |
| Heating Oil | 26.3 | 16.4 | 16.0 | 15.6 | 15.2 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.2 | 0.5 | 0.5 | 0.5 | 0.5 | |
| Wood | 2.5 | 0.8 | 0.8 | 0.7 | 0.7 | |