Ruud MR40245 C
Ruud MR40245 C is in the DOE listing as of Oct 19, 2026.
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under AMERICAN STANDARD WATER HEATERS ENS40H-*.
Certified figures
- Storage volume
- 37gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 51gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MR40245 C-* | 37 | 0.92 | 51 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
Starting full, it gives 51 gallons of hot water in its first hour of use. Its tank holds 37 gallons, so reheating adds 14 gallons during the first hour. In the first hour, 286 of the 477 electric storage models give more hot water. The median electric storage model gives 55 gallons in the first hour of the test.
In tests, 92% of the energy it uses ends up as hot water (UEF 0.92). In the test, daily hot water use was set to medium (its draw pattern). Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. For its type and draw pattern, its UEF sits at the median. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).
All of its test figures are shared by 3 other basic models. The AMERICAN STANDARD WATER HEATERS, Ariston, and Lennox brands list one or more of them. For the full group, see the AMERICAN STANDARD WATER HEATERS ENS40H-* page.
Also listed as
They carry every figure in the table above.
Not covered
- Advertised figures. We have none on file for this model.