| 2000 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 255.9 | 290.7 | 292.1 | 293.6 | 295.3 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 137.8 | 194.6 | 197.4 | 200.2 | 203.0 | |
| Natural Gas | 0.0 | 2.2 | 2.6 | 3.1 | 3.8 | |
| Heating Oil | 108.1 | 86.9 | 85.2 | 83.4 | 81.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 1.2 | 2.6 | 2.8 | 2.9 | 3.0 | |
| Wood | 8.8 | 4.4 | 4.2 | 4.0 | 3.8 | |
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 | |
| Total Single Attached Water Heater Stock (thousands) | 23.8 | 32.6 | 33.1 | 33.7 | 34.3 | |
Water Heater Stock by Energy Source (thousands) | ||||||
| Electricity | 12.8 | 21.8 | 22.4 | 23.0 | 23.6 | |
| Natural Gas | 0.0 | 0.2 | 0.3 | 0.4 | 0.4 | |
| Heating Oil | 10.1 | 9.7 | 9.7 | 9.6 | 9.5 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.1 | 0.3 | 0.3 | 0.3 | 0.4 | |
| Wood | 0.8 | 0.5 | 0.5 | 0.5 | 0.4 | |
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 | |