ARISTON EVR040*2X*** vs RHEEM/RUUD PROE47 S2 RH95: which uses less energy?
At the medium draw pattern the ARISTON EVR040*2X*** uses 3,456 kWh a year and the RHEEM/RUUD PROE47 S2 RH95 3,493 — 37 kWh (1%) less, about 372 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 | ARISTON EVR040*2X*** | RHEEM/RUUD PROE47 S2 RH95 |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.94 (better) | 0.93 |
| Energy use per year (kWh) | 3,456 (better) | 3,493 |
| First hour rating (gal) | 56 | 54 |
| Rated storage volume (gal) | 39 | 43 |
| Installed cost range | $1,647–$2,310 | $1,699–$2,194 |
| 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 EVR040*2X*** if running cost matters most: it uses 37 kWh less a year on the same test.
- Pick the RHEEM/RUUD PROE47 S2 RH95 if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the ARISTON EVR040*2X***.
- Neither if your household's busiest hour needs more than 56 gallons of hot water — neither lists more. Check whether a 40-gallon heater is enough.
Each model on its own
-
ARISTON EVR040*2X***
Its filed figures, class position and running cost on your ZIP.
-
RHEEM/RUUD PROE47 S2 RH95
Its filed figures, class position and running cost on your ZIP.