Heat pump water heaters side by side
The 7 most-searched heat pump models, with the certified figures of each.
From the smallest to the largest, these tanks are sold as 50 to 80 gallons. Among these tanks, hot water in the first hour peaks at 86 gallons. The tank behind that figure is the A. O. Smith HPTU-80N 1**. The tank reheats during the hour, so 86 gallons tops the largest tank size here.
A UEF compares only on the same draw pattern, and these heat pump models were not all tested on one. These 7 models include 6 with ENERGY STAR certified status.
These 7 models include 6 that may qualify for a rebate program. Other basic models match every figure of 4 of these 7 models. With the other basic models that carry the same figures, they come to 22 basic models.
Every heat pump model by efficiency and first-hour hot water
Up is more hot water in the first hour of use, starting full. Right is more efficient. A UEF compares only between models tested on the same draw pattern, so the chart shows one pattern at a time, the most common first.
Certified figures
In order of size, smallest first, then UEF, highest first.
| Figure | GE Profile PH50S10BNY01 | Bradford White RE2HP50**-1NCTT | A. O. Smith HPTS-50 2** | Rinnai REHP50BM | A. O. Smith HPTU-66N 1** | A. O. Smith HPTU-80N 1** | Stiebel Eltron Accelera 300 E |
|---|---|---|---|---|---|---|---|
| Size (gal) | 50 | 50 | 50 | 50 | 66 | 80 | — |
| Storage volume (gal) | 50 | 45 | 46 | 46 | 67 | 82 | 58 |
| UEF | 4.50 | 3.89 | 3.80 | 3.75 | 3.45 | 3.45 | 3.17 |
| Draw pattern | High | Medium | Medium | Medium | High | High | Medium |
| First-hour rating (gal) | 75 | 65 | 65 | 73 | 79 | 86 | 66 |
| Recovery efficiency | 491% | 445% | 452% | 465% | 265% | 233% | 329% |
| ENERGY STAR | Certified | Certified | Certified | Certified | Certified | Certified | — |
| Listed models | 1 | 1 | 3 | 3 | 3 | 5 | 1 |
| Rebate programs (may qualify) | 21 | 17 | 21 | 21 | 20 | 20 | 0 |
| Also listed as | — | 1 basic model | 4 basic models | — | 5 basic models | 5 basic models | — |
UEF is the uniform energy factor. A UEF compares only between models with the same draw pattern. A range means the listed models differ. A dash means no such figure, or not listed as ENERGY STAR certified.
Also listed as
Bradford White RE2HP50**-1NCTT
A. O. Smith HPTS-50 2**
A. O. Smith HPTU-66N 1**
- American HPTU-66N 1**
- Lochinvar HPTU-66N 1**
- RELIANCE WATER HEATERS HPTU-66N 1**
- State HPTU-66N 1**
- U.S. Craftmaster HPTU-66N 1**
A. O. Smith HPTU-80N 1**
- American HPTU-80N 1**
- Lochinvar HPTU-80N 1**
- RELIANCE WATER HEATERS HPTU-80N 1**
- State HPTU-80N 1**
- U.S. Craftmaster HPTU-80N 1**
Each carries every figure in its column.
Every heat pump water heater with its certified figures
Not covered
- Price, warranty, and installation.
- Models searched for less often. Each one is on the full list.