MARATHON MRG105245 vs VAUGHN MP80F: which uses less energy?
At the high draw pattern the VAUGHN MP80F uses 5,392 kWh a year and the MARATHON MRG105245 5,512 — 120 kWh (2%) less, about 1,198 kWh over ten years. Both are filed as an electric tank your utility can shift to off-peak hours, 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 your utility can shift to off-peak hours at the high draw pattern.
| Figure | MARATHON MRG105245 | VAUGHN MP80F |
|---|---|---|
| UEF (Uniform Energy Factor) | 0.9 | 0.92 (better) |
| Energy use per year (kWh) | 5,512 | 5,392 (better) |
| First hour rating (gal) | 83 | 83 |
| Rated storage volume (gal) | 101 | 80 |
| Installed cost range | not published | not published |
| 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 VAUGHN MP80F if running cost matters most: it uses 120 kWh less a year on the same test.
- Pick the MARATHON MRG105245 if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the VAUGHN MP80F.
- Neither if your household's busiest hour needs more than 83 gallons of hot water — neither lists more. Check whether a 75-gallon heater is enough.
Each model on its own
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MARATHON MRG105245
Its filed figures, class position and running cost on your ZIP.
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VAUGHN MP80F
Its filed figures, class position and running cost on your ZIP.