Appendix D2 to Part 305—Water Heaters—Electric
| Capacity | Range of estimated annual energy costs (dollars/year) | |
|---|---|---|
| First hour rating | Low | High |
| “Very Small”—less than 18 | (*) | (*) |
| “Low”—18 to 50.9 | 90 | 357 |
| “Medium”—51 to 74.9 | 121 | 494 |
| “High”—75 and over | 173 | 747 |
| (*) No data. |
[88 FR 1136, Jan. 9, 2023]