MARATHON MR40245 C
0.92 UEF DOE CCD · 2026-09-19Grade G: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the MARATHON MR40245 C, this site computes 3,531 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That equals the median of the 426 electric tank models at the same draw pattern, with a difference of 0 kWh.
Energy use per year
3,531 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 equal to the median of 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 213 of 426, lowest energy first.
Solid line: this model (3,531 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 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
- 0.92 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium 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
- 51 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 38 gal DOE CCD · 2026-09-19
What it costs to install
$1,620–$1,853 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety 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 40-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 0.92 · Grade G Price it on your ZIP
The 3,531 kWh figure is computed by this site and does not appear in the registry. 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 medium pattern. For the MARATHON MR40245 C, the listed UEF is 0.92, and the fuel is electricity. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only at the federal test's daily draw. A home that draws more or less hot water than that pattern will use a different amount, and the registry gives no figure for other draws. You can check each step of the calculation in how this site calculates annual energy and running cost.
Among the 426 electric tank models at the medium draw pattern, the MARATHON MR40245 C ranks 213th lowest in energy use. That places it in the second-lowest quarter of the class. Its 3,531 kWh sits 0 kWh from the class median of 3,531 kWh, so it is neither above nor below the median. The registry also lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 51 gallons. Its rated volume is 38 gallons. The medium pattern stands for a typical household's daily use. The rating does not cover a household whose busy-morning demand exceeds 51 gallons. To compare other models in this class, use the same-class replacement search by model number.
The running cost is not stated in this text. It depends on your utility's electricity tariff, so the page computes it from your ZIP. The calculation prices the same 3,531 kWh at the medium draw pattern at your own rate. A different tariff changes the cost, but not the energy figure or its rank of 213th among 426 models. Enter your ZIP in the running-cost calculator for your own ZIP. The installed price appears in a separate block on this page, with its source and date. That block shows a modeled installed-cost range, not a quote from an installer.
DOE CCD · 2026-09-19