Data through April 2026
Ranking · computed from certified data
The Most Efficient Electric Water Heaters
Certified electric water heaters ranked by lowest annual electricity use — heat-pump units lead by a wide margin.
The spread inside this top 20: 643–780 kWh/yr, or $121–$147 a year at the U.S. average rate. Ties are ordered alphabetically.
| # | Model | Type | kWh/yr | $/yr (US avg) |
|---|---|---|---|---|
| 1 | Friedrich PROH40 T2 FD400-15 | — | 643 | $121 |
| 2 | Rheem PROPH40 T2 RH375-15 | — | 643 | $121 |
| 3 | Rheem PROPH40 T2 RH400-15 | — | 643 | $121 |
| 4 | Rheem XE40T10H22U0 | — | 643 | $121 |
| 5 | Rheem XE40T10H22U1 | — | 643 | $121 |
| 6 | Richmond 10E40-HP515 | — | 643 | $121 |
| 7 | Richmond 10E40-HP5U15 | — | 643 | $121 |
| 8 | Ruud PROUH40 T2 RU375-15 | — | 643 | $121 |
| 9 | Ruud PROUH40 T2 RU400-15 | — | 643 | $121 |
| 10 | Eco-Logical OMNI-50HP1-1A | — | 681 | $128 |
| 11 | GE Profile PF40S10FPY01 | — | 724 | $136 |
| 12 | Eco-Logical OMNI-50HP2-1A | — | 769 | $145 |
| 13 | GE Profile PH40S10BPY01 | — | 773 | $146 |
| 14 | Friedrich PROH40 T0 FD120-M | — | 780 | $147 |
| 15 | Friedrich PROH40 T0 FD120-MSO | — | 780 | $147 |
| 16 | Rheem PROPH40 T0 RH120-M | — | 780 | $147 |
| 17 | Rheem PROPH40 T0 RH120-MSO | — | 780 | $147 |
| 18 | Rheem XE40T10HM00U0 | — | 780 | $147 |
| 19 | Rheem XE40T10HMS00U0 | — | 780 | $147 |
| 20 | Richmond 10E40-HP120M | — | 780 | $147 |
How this list is built: every entry comes straight from the ENERGY STAR certified-product dataset for water heaters (electric) (566 models), ordered by certified annual kWh. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.