Reclaim Energy MP80F-RC vs RINNAI US3-RSJ-15/300RDVN3-L4: which uses less energy?
At the high draw pattern the RINNAI US3-RSJ-15/300RDVN3-L4 uses 1,240 kWh a year and the Reclaim Energy MP80F-RC 1,306 — 65 kWh (5%) less, about 653 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 | Reclaim Energy MP80F-RC | RINNAI US3-RSJ-15/300RDVN3-L4 |
|---|---|---|
| UEF (Uniform Energy Factor) | 3.8 | 4 (better) |
| Energy use per year (kWh) | 1,306 | 1,240 (better) |
| First hour rating (gal) | 98 | 91 |
| Rated storage volume (gal) | 80 | 75 |
| Installed cost range | $4,165–$4,780 | $4,026–$4,933 |
| ENERGY STAR certified | yes | yes |
| Sound level (dB) | 37 (better) | 49 |
| Refrigerant | R-744 (CO2), GWP 1 | R-134a, GWP 1430 |
| On the market since | 2026-06-01 | 2026-06-30 |
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 Reclaim Energy MP80F-RC since 2026-06-01, the RINNAI US3-RSJ-15/300RDVN3-L4 since 2026-06-30. A sale date, not a lifespan.
Which should you pick?
- Pick the RINNAI US3-RSJ-15/300RDVN3-L4 if running cost matters most: it uses 65 kWh less a year on the same test.
- Pick the Reclaim Energy MP80F-RC if you need more hot water in your busiest hour: it lists a first hour rating of 98 gallons against 91.
- Neither if your household's busiest hour needs more than 98 gallons of hot water — neither lists more. Check whether a 75-gallon heater is enough.
Each model on its own
-
Reclaim Energy MP80F-RC
Its filed figures, class position and running cost on your ZIP.
-
RINNAI US3-RSJ-15/300RDVN3-L4
Its filed figures, class position and running cost on your ZIP.