| 2000 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Single Detached Water Heater Stock (thousands) | 2,521.4 | 2,930.1 | 2,950.3 | 2,970.2 | 2,987.5 | 3,008.1 | 3,033.5 | 3,073.6 | 3,121.4 | 3,172.9 | 3,224.4 | |
Water Heater Stock by Energy Source (thousands) | ||||||||||||
| Electricity | 746.5 | 745.3 | 751.2 | 756.2 | 760.0 | 764.0 | 769.1 | 777.4 | 788.6 | 800.6 | 812.5 | |
| Natural Gas | 1,675.6 | 2,073.4 | 2,097.7 | 2,119.9 | 2,138.5 | 2,158.1 | 2,180.8 | 2,212.8 | 2,248.9 | 2,287.3 | 2,325.6 | |
| Heating Oil | 74.8 | 68.0 | 59.0 | 51.0 | 44.1 | 38.1 | 33.0 | 28.7 | 26.7 | 24.9 | 23.3 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 9.9 | 26.4 | 29.1 | 32.6 | 36.7 | 41.4 | 45.7 | 50.7 | 53.8 | 57.0 | 60.3 | |
| Wood | 14.5 | 17.0 | 13.3 | 10.5 | 8.2 | 6.4 | 5.1 | 4.0 | 3.5 | 3.0 | 2.7 | |
Shares (%) | ||||||||||||
| Electricity | 29.6 | 25.4 | 25.5 | 25.5 | 25.4 | 25.4 | 25.4 | 25.3 | 25.3 | 25.2 | 25.2 | |
| Natural Gas | 66.5 | 70.8 | 71.1 | 71.4 | 71.6 | 71.7 | 71.9 | 72.0 | 72.0 | 72.1 | 72.1 | |
| Heating Oil | 3.0 | 2.3 | 2.0 | 1.7 | 1.5 | 1.3 | 1.1 | 0.9 | 0.9 | 0.8 | 0.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.4 | 0.9 | 1.0 | 1.1 | 1.2 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | |
| Wood | 0.6 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | |
| Total Single Attached Water Heater Stock (thousands) | 628.1 | 811.0 | 824.3 | 836.7 | 847.2 | 859.1 | 873.5 | 890.6 | 903.9 | 919.1 | 934.3 | |
Water Heater Stock by Energy Source (thousands) | ||||||||||||
| Electricity | 186.0 | 206.3 | 209.9 | 213.0 | 215.5 | 218.2 | 221.5 | 225.3 | 228.4 | 231.9 | 235.4 | |
| Natural Gas | 417.4 | 573.9 | 586.1 | 597.1 | 606.5 | 616.4 | 627.9 | 641.2 | 651.2 | 662.6 | 673.9 | |
| Heating Oil | 18.6 | 18.8 | 16.5 | 14.4 | 12.5 | 10.9 | 9.5 | 8.3 | 7.7 | 7.2 | 6.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 2.5 | 7.3 | 8.1 | 9.2 | 10.4 | 11.8 | 13.1 | 14.7 | 15.6 | 16.5 | 17.5 | |
| Wood | 3.6 | 4.7 | 3.7 | 3.0 | 2.3 | 1.8 | 1.5 | 1.2 | 1.0 | 0.9 | 0.8 | |
Shares (%) | ||||||||||||
| Electricity | 29.6 | 25.4 | 25.5 | 25.5 | 25.4 | 25.4 | 25.4 | 25.3 | 25.3 | 25.2 | 25.2 | |
| Natural Gas | 66.5 | 70.8 | 71.1 | 71.4 | 71.6 | 71.7 | 71.9 | 72.0 | 72.0 | 72.1 | 72.1 | |
| Heating Oil | 3.0 | 2.3 | 2.0 | 1.7 | 1.5 | 1.3 | 1.1 | 0.9 | 0.9 | 0.8 | 0.7 | |
| Steam | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Other1 | 0.4 | 0.9 | 1.0 | 1.1 | 1.2 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | |
| Wood | 0.6 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | |