FRIEDRICH PROPH50 T0 RH120 vs LOCHINVAR HPTV-50 2**: which uses less energy?
At the medium draw pattern the FRIEDRICH PROPH50 T0 RH120 and the LOCHINVAR HPTV-50 2** use the same energy, 1,083 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 | FRIEDRICH PROPH50 T0 RH120 | LOCHINVAR HPTV-50 2** |
|---|---|---|
| UEF (Uniform Energy Factor) | 3 | 3 |
| Energy use per year (kWh) | 1,083 | 1,083 |
| First hour rating (gal) | 51 | 52 |
| Rated storage volume (gal) | 46 | 46 |
| Installed cost range | $2,970–$3,660 | $2,970–$3,660 |
| ENERGY STAR certified | yes | yes |
| Sound level (dB) | not filed | 45 |
| Refrigerant | R-134a, GWP 1430 | R-513A, GWP 630 |
| On the market since | 2022-07-15 | 2023-07-10 |
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.
- Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
- Time on the market, as filed with ENERGY STAR: the FRIEDRICH PROPH50 T0 RH120 since 2022-07-15, the LOCHINVAR HPTV-50 2** since 2023-07-10. A sale date, not a lifespan.
Which should you pick?
- Pick the FRIEDRICH PROPH50 T0 RH120 if its price or availability suits you — on energy the two are level.
- Pick the LOCHINVAR HPTV-50 2** if you need more hot water in your busiest hour: it lists a first hour rating of 52 gallons against 51.
- Neither if your household's busiest hour needs more than 52 gallons of hot water — neither lists more. Check whether a 50-gallon heater is enough.
Each model on its own
-
FRIEDRICH PROPH50 T0 RH120
Its filed figures, class position and running cost on your ZIP.
-
LOCHINVAR HPTV-50 2**
Its filed figures, class position and running cost on your ZIP.