AMERICAN ENL-50 1** vs ARISTON ENS50LU-*: which uses less energy?
At the medium draw pattern the ARISTON ENS50LU-* uses 3,493 kWh a year and the AMERICAN ENL-50 1** 3,531 — 38 kWh (1%) less, about 380 kWh over ten years. Both are filed as an electric tank, so the comparison holds. Enter your ZIP below to price the difference.
Side by side
Compared within one class only: models filed as an electric tank at the medium draw pattern.
| Figure | AMERICAN ENL-50 1** | ARISTON ENS50LU-* |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.92 | 0.93 (better) |
| Energy use per year (kWh) | 3,531 | 3,493 (better) |
| First hour rating (gal) | 51 | 52 |
| Rated storage volume (gal) | 48 | 42 |
| Installed cost range | $1,765–$2,103 | $1,684–$2,169 |
| 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 ARISTON ENS50LU-* if running cost matters most: it uses 38 kWh less a year on the same test.
- Pick the AMERICAN ENL-50 1** if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the ARISTON ENS50LU-*.
- Neither if your household's busiest hour needs more than 52 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.
Each model on its own
-
AMERICAN ENL-50 1**
Its filed figures, class position and running cost on your ZIP.
-
ARISTON ENS50LU-*
Its filed figures, class position and running cost on your ZIP.