A. O. SMITH ENT-50-1** vs AMERICAN HESF-50 1**: which uses less energy?
At the medium draw pattern the A. O. SMITH ENT-50-1** and the AMERICAN HESF-50 1** use the same energy, 3,531 kWh a year each, on the same federal test. Both are filed as an electric tank, so the comparison holds; what separates them is below. Enter your ZIP to price either one on your own rate.
Side by side
Compared within one class only: models filed as an electric tank at the medium draw pattern.
| Figure | A. O. SMITH ENT-50-1** | AMERICAN HESF-50 1** |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.92 | 0.92 |
| Energy use per year (kWh) | 3,531 | 3,531 |
| First hour rating (gal) | 62 | 67 |
| Rated storage volume (gal) | 46 | 46 |
| Installed cost range | $1,736–$2,053 | $1,736–$2,053 |
| ENERGY STAR certified | not matched | not matched |
What it costs to run
Reliability
Not published: Reliability, failure rates and each model’s actual warranty term.
The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.
What is here instead:
- The filed efficiency, capacity and tank size of both models, side by side below.
- The actual warranty term is printed in each model’s documentation, not in any registry.
Which should you pick?
- Pick the A. O. SMITH ENT-50-1** if its price or availability suits you — on energy the two are level.
- Pick the AMERICAN HESF-50 1** if you need more hot water in your busiest hour: it lists a first hour rating of 67 gallons against 62.
- Neither if your household's busiest hour needs more than 67 gallons of hot water — neither lists more. Check whether a 50-gallon heater is enough.
Each model on its own
-
A. O. SMITH ENT-50-1**
Its filed figures, class position and running cost on your ZIP.
-
AMERICAN HESF-50 1**
Its filed figures, class position and running cost on your ZIP.