Chiltrix Inc. DHW80 vs Rheem PROPH80 T0 RH120-M: which uses less energy?
At the high draw pattern the Rheem PROPH80 T0 RH120-M uses 1,434 kWh a year and the Chiltrix Inc. DHW80 1,499 — 65 kWh (4%) less, about 650 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 high draw pattern.
| Figure | Chiltrix Inc. DHW80 | Rheem PROPH80 T0 RH120-M |
|---|---|---|
| UEF (Uniform Energy Factor) | 3.31 | 3.46 (better) |
| Energy use per year (kWh) | 1,499 | 1,434 (better) |
| First hour rating (gal) | 88 | 84 |
| Rated storage volume (gal) | 71 | 72 |
| Installed cost range | $3,816–$4,206 | $3,866–$4,365 |
| ENERGY STAR certified | not matched | yes |
| Refrigerant | not filed | R-134a, GWP 1430 |
| On the market since | not filed | 2024-03-01 |
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 Rheem PROPH80 T0 RH120-M if running cost matters most: it uses 65 kWh less a year on the same test.
- Pick the Chiltrix Inc. DHW80 if you need more hot water in your busiest hour: it lists a first hour rating of 88 gallons against 84.
- Neither if your household's busiest hour needs more than 88 gallons of hot water — neither lists more. Check whether a 75-gallon heater is enough.
Each model on its own
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Chiltrix Inc. DHW80
Its filed figures, class position and running cost on your ZIP.
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Rheem PROPH80 T0 RH120-M
Its filed figures, class position and running cost on your ZIP.