VAUGHN ME50

The 3,531 kWh figure does not appear in the registry itself. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the medium pattern. For this model the registry lists a UEF of 0.92, from the DOE Compliance Certification Database, retrieved 2026-09-19. The medium pattern stands for a typical family household with a busy morning of hot-water use. The annual figure holds only at that test draw. A home that draws more hot water each day than the test assumes would use more electricity, and a home that draws less would use less. The steps behind the figure are set out in how the annual cost is calculated.

Against its class, this model's 3,531 kWh at the medium draw pattern equals the class median of 3,531 kWh, a difference of 0 kWh. Its rank of 213th lowest of 426 places it in the second-lowest quarter of its class for energy use. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 56 gallons, from a rated volume of 47 gallons. The unit fits a home whose daily use is close to the medium pattern. A home whose busiest hour needs more than 56 gallons falls outside what that rating covers. To check other electric tank models at the same draw pattern, use a same-class replacement search by model number.

The running cost is not stated here because it depends on your own electricity rate. Multiplying 3,531 kWh by the rate on your utility tariff gives the yearly cost at the medium draw pattern. The cost calculator on your own ZIP does this from your local tariff. Because this model's use equals the class median, its running cost at any given rate equals that of a median model in its class. The installed price range appears in its own block, with its source and date. That range is a modeled installed cost, not a quote. What this unit will use in a specific home is not known from the registry; only the test-draw figure is available.