DoesTheMath

HUBBELL MP80F vs Ruud MRG105245: which uses less energy?

At the high draw pattern the HUBBELL MP80F uses 5,392 kWh a year and the Ruud 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.

Filed and computed figures
Figure HUBBELL MP80F Ruud MRG105245
UEF (Uniform Energy Factor) 0.92 (better) 0.9
Energy use per year (kWh) 5,392 (better) 5,512
First hour rating (gal) 83 83
Rated storage volume (gal) 80 101
Installed cost range not published not published
ENERGY STAR certified not matched not matched
DOE CCD · 2026-09-19

What it costs to run

HUBBELL MP80F: 5,392 kWh a year Ruud MRG105245: 5,512 kWh a year

HUBBELL MP80F — 5,392 kWh a year Ruud MRG105245 — 5,512 kWh a year

HUBBELL MP80F is 120 kWh a year lower than Ruud MRG105245.

DOE CCD · 2026-09-19

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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 HUBBELL MP80F if running cost matters most: it uses 120 kWh less a year on the same test.
  • Pick the Ruud MRG105245 if it is the one you can get installed sooner or for less — on the filed figures it has no advantage over the HUBBELL 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