| 2000 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Water Heater Stock (thousands) | 12,200 | 14,622 | 14,791 | 14,971 | 15,143 | 15,317 | 15,520 | 15,722 | 15,944 | 16,186 | |
Water Heater Stock by Building Type (thousands) | |||||||||||
| Single Detached | 6,843 | 8,018 | 8,080 | 8,135 | 8,188 | 8,246 | 8,320 | 8,398 | 8,479 | 8,567 | |
| Single Attached | 1,285 | 1,715 | 1,748 | 1,779 | 1,811 | 1,845 | 1,882 | 1,915 | 1,950 | 1,987 | |
| Apartments | 3,839 | 4,622 | 4,694 | 4,786 | 4,872 | 4,952 | 5,042 | 5,131 | 5,235 | 5,350 | |
| Mobile Homes | 233 | 267 | 269 | 271 | 272 | 274 | 276 | 278 | 280 | 282 | |
Shares (%) | |||||||||||
| Single Detached | 56.1 | 54.8 | 54.6 | 54.3 | 54.1 | 53.8 | 53.6 | 53.4 | 53.2 | 52.9 | |
| Single Attached | 10.5 | 11.7 | 11.8 | 11.9 | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.3 | |
| Apartments | 31.5 | 31.6 | 31.7 | 32.0 | 32.2 | 32.3 | 32.5 | 32.6 | 32.8 | 33.1 | |
| Mobile Homes | 1.9 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.7 | |
Water Heater Stock by Energy Source (thousands) | |||||||||||
| Electricity | 5,786 | 6,926 | 7,047 | 7,161 | 7,274 | 7,389 | 7,513 | 7,620 | 7,733 | 7,858 | |
| Natural Gas | 5,683 | 7,088 | 7,176 | 7,274 | 7,358 | 7,440 | 7,535 | 7,637 | 7,748 | 7,868 | |
| Heating Oil | 613 | 461 | 423 | 389 | 359 | 331 | 307 | 296 | 287 | 278 | |
| Other1 | 40 | 78 | 85 | 95 | 106 | 116 | 128 | 135 | 142 | 150 | |
| Wood | 79 | 68 | 60 | 53 | 46 | 41 | 37 | 35 | 33 | 31 | |
Shares (%) | |||||||||||
| Electricity | 47.4 | 47.4 | 47.6 | 47.8 | 48.0 | 48.2 | 48.4 | 48.5 | 48.5 | 48.5 | |
| Natural Gas | 46.6 | 48.5 | 48.5 | 48.6 | 48.6 | 48.6 | 48.6 | 48.6 | 48.6 | 48.6 | |
| Heating Oil | 5.0 | 3.2 | 2.9 | 2.6 | 2.4 | 2.2 | 2.0 | 1.9 | 1.8 | 1.7 | |
| Other1 | 0.3 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | |
| Wood | 0.6 | 0.5 | 0.4 | 0.4 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | |