MARATHON MR30245 C
0.88 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 163 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, low draw pattern (a one- or two-person household).
If you are checking the MARATHON MR30245 C against the registry, it uses 2,550 kWh of electricity a year. That figure applies at the low draw pattern, the standard daily hot-water usage DOE tests against. It sits 111 kWh above its class median of 2,439 kWh, ranking 158th of 163 from lowest energy use.
Energy use per year
2,550 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 2,439 kWh for the 163 models registered in the same heater type and draw pattern; it ranks 158 of 163, lowest energy first.
Solid line: this model (2,550 kWh). Dashed line: the class median.
Min 724 kWh Median 2,439 kWh Max 2,550 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
- 0.88 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the low draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Low 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
- 38 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 28 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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Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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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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Is a 30-gallon water heater enough?
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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All electric resistance tank water heaters
Electric tanks that file a UEF below 2.0 — heated by elements, not a heat pump.
UEF 0.88 · Grade G Price it on your ZIP
This site computed the 2,550 kWh figure; the registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the low pattern. This model's UEF is 0.88. The underlying ratings come from the DOE CCD, retrieved 2026-09-19. The low draw pattern stands for a one- or two-person household, so the figure holds only at that test draw. A household drawing more hot water each day would use more than 2,550 kWh. How much more is not available in this data. The page on how this site calculates annual energy and cost sets out each step.
The comparison class is the 163 models registered as an electric tank at the low draw pattern. Their median is 2,439 kWh a year, and this model uses 111 kWh more than that median. It ranks 158th of 163 counted from the lowest energy use. That rank places it in the highest quarter of its class for energy use. The tank has a rated volume of 28 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 38 gallons. A reader looking for lower yearly use at this draw pattern can find a same-class replacement by model number.
The running cost is not stated here, because it depends on your own utility's electricity tariff. The running cost calculator for your own ZIP applies your local rate to the 2,550 kWh figure at the low draw pattern. An installed price range is not published for the MR30245 C. This model's ratings lie outside the range the cost database's model was fitted on. This site does not stretch that model past its fitted range. Any installed price for this unit therefore remains unknown on this page, and no figure is given in its place.
DOE CCD · 2026-09-19