MRCOOL MEWH50S82S1

This site calculates the 3,531 kWh figure; the registry does not publish it. The calculation 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 draw pattern. This model's UEF is 0.92. The source is DOE's Compliance Certification Database (CCD), retrieved 2026-09-19. The figure therefore holds only at that test draw. A household that uses more hot water each day than the test assumes will use more than 3,531 kWh. A household that uses less will use less. The registry does not show how large that difference would be for a given home. The steps are set out in how this site calculates annual energy and cost.

The 3,531 kWh median comes from the 426 models registered as an electric tank at the medium draw pattern. In 213th place, this model sits in the second-lowest quarter of that class for energy use. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 64 gallons. Its rated volume is 47 gallons. A home that needs no more than 64 gallons of hot water in its busiest hour is within that rating. A home that needs more in its peak hour is not, whatever the energy figure shows. Readers checking a like-for-like swap can find a same-class replacement by model number.

This text states no running cost. The yearly cost of 3,531 kWh depends on the reader's own utility electricity tariff. The page therefore works it out from the reader's ZIP in the cost calculator for your own ZIP. This model sits 0 kWh from the class median of 3,531 kWh. At any single rate, its running cost at the test draw matches that of a median model in its class. The installed price range on this page has its own block, with its source and date. That range is modeled and is not a quote. The registry reports results only at the federal test conditions, so performance outside those conditions is not known.