MRCOOL MEWH40T82S1

This site computed the 3,531 kWh figure. The registry does not publish it. The figure combines the model's UEF, the ratio of hot water delivered to energy used, of 0.92 with the DOE test's daily hot-water draw for the medium draw pattern. The UEF comes from the DOE Compliance Certification Database, retrieved 2026-09-19. The figure holds only at that test draw, so a household that uses more or less hot water will see a different total. The registry also lists a rated volume of 37 gallons. It gives a first hour rating, the gallons of hot water available in the first hour from a full tank, of 55 gallons. Our page on how the annual cost is calculated explains each step of the method.

This unit is compared with the 426 models registered as an electric tank at the medium draw pattern. Among them, it ranks 213th lowest in energy use. Its 3,531 kWh matches the class median of 3,531 kWh, a difference of 0 kWh. For a plumber or seller checking a quote, this places the model at the middle of its class for energy use. A reader who wants lower yearly use at the same draw pattern would look at models with a lower rank number. The same-class replacement search by model number lists those models. A household whose peak-hour demand exceeds the 55-gallon first hour rating needs more than this rating covers.

The text on this page states no running cost, because it depends on your own utility electricity tariff. The yearly cost equals 3,531 kWh multiplied by your rate per kWh, at the medium draw pattern. A different rate gives a different result. The cost calculator for your own ZIP applies your local tariff to this model's figure. The installed-cost range in its own block on this page is a modeled range with its own source and date. It is not a quote. Energy use and installed cost are separate figures. Neither one changes how this model's energy use compares with the other 426 models in its class.