MARATHON MR30245 C
MARATHON MR30245 C is in the DOE listing as of Oct 26, 2026.
It has a certified storage volume of 28 gallons, a certified UEF of 0.88, and a certified first-hour rating of 37–38 gallons of hot water.
- Electric storage water heater
- 2 listed models
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 28gallons
- UEF
- 0.88Uniform energy factor
- First-hour rating
- 37–38gallonsHot water in the first hour
The 2 listed models differ. A range runs from the lowest figure to the highest.
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Change your hourCertified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MR30238 C | 28 | 0.88 | 37 | 98% | Low |
| MR30245 C | 28 | 0.88 | 38 | 98% | Low |
UEF is the uniform energy factor. A dash means the model has no such figure.
It gives 37 to 38 gallons of hot water in its first hour, by model number. In the first hour, 459 of the 477 electric storage models give more hot water. Among electric storage models, the median first-hour rating is 55 gallons.
In the test, 12% of its energy does not reach the hot water (UEF 0.88). In the test, daily hot water use was set to low (its draw pattern). Its UEF is lower than that of 151 of the 157 electric storage models with its draw pattern. On its draw pattern, the median electric storage UEF is 0.92. The water took in 98% of the energy used to reheat it (its recovery efficiency).
It is sold as MR30238 C and MR30245 C. All of its test figures are shared by one other basic model. That one carries the Ruud brand name.
Also listed as
They carry every figure in the table above.
Not covered
- Advertised figures. We have none on file for this model.