MARATHON MRG105245
0.9 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 21 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank your utility can shift to off-peak hours, high draw pattern (a larger household, or one where showers and laundry overlap).
Checking a listing? MARATHON MRG105245 uses 5,512 kWh a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 120 kWh above the 5,392 kWh class median across 21 registered models. It ranks 16th lowest in energy use among them.
Energy use per year
5,512 kWh a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the electricity rate where you live.
That is above the median of 5,392 kWh for the 21 models registered in the same heater type and draw pattern; it ranks 16 of 21, lowest energy first.
Solid line: this model (5,512 kWh). Dashed line: the class median.
Min 5,334 kWh Median 5,392 kWh Max 5,512 kWh
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 0.9 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank your utility can shift to off-peak hours at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 83 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 101 gal DOE CCD · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's UEF lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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Water heaters
Every model on file with the Department of Energy, by heater type.
UEF 0.9 · Grade G Price it on your ZIP
The annual figure is computed by this site, not published by the registry. It comes from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for this draw pattern. This model lists a UEF of 0.9. The result is 5,512 kWh, from DOE CCD data retrieved on 2026-09-19. It holds only for the high draw pattern at the federal test's daily draw. A household that draws more or less hot water each day will see a different figure. The figure covers electricity only. Read how the annual cost is calculated for the full method.
The high draw pattern describes a larger household, or one where showers and laundry overlap. This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 83 gallons. Its rated volume is 101 gallons. For energy use, it has the 16th lowest of 21, in the second-highest quarter of its class. It fits a household that needs a tank registered for this draw pattern more than one whose priority is the lowest energy use in the class. The selector by fuel, space and size filters models by those inputs.
Running cost depends on your utility's electricity rate, and this page does not state one. Multiply 5,512 kWh by your rate to get a yearly figure. The cost calculator does this from your ZIP. Because this model uses 120 kWh more than the class median of 5,392 kWh, the same rate gives a higher yearly amount than it would at the median. The installed price range is not published. This model's ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. The data here does not say whether your utility applies an off-peak rate. To compare within the class, find a same-class replacement by model number.
DOE CCD · 2026-09-19