ARISTON ENS30L-* vs Lennox WHES030L45TN240S****: which uses less energy?
At the low draw pattern the ARISTON ENS30L-* and the Lennox WHES030L45TN240S**** use the same energy, 2,413 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 low draw pattern.
| Figure | ARISTON ENS30L-* | Lennox WHES030L45TN240S**** |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.93 | 0.93 |
| Energy use per year (kWh) | 2,413 | 2,413 |
| First hour rating (gal) | 44 | 40 |
| Rated storage volume (gal) | 27 | 27 |
| Installed cost range | $1,467–$1,793 | $1,467–$1,793 |
| 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 ENS30L-* if its price or availability suits you — on energy the two are level.
- Pick the Lennox WHES030L45TN240S**** if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the ARISTON ENS30L-*.
- Neither if your household's busiest hour needs more than 44 gallons of hot water — neither lists more. Check whether a 30-gallon heater is enough.
Each model on its own
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ARISTON ENS30L-*
Its filed figures, class position and running cost on your ZIP.
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Lennox WHES030L45TN240S****
Its filed figures, class position and running cost on your ZIP.