VAUGHN THERMAL ME55

The 3,531 kWh figure is calculated by this site. The registry does not publish it. It 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. For this model the UEF is 0.92, and the inputs come from the DOE CCD, retrieved 2026-09-19. The figure describes the federal test condition, not a particular home. A household that draws more or less hot water than the test will use a different amount of electricity. This page does not have that figure. The steps are set out in how the annual cost is calculated.

Among the 426 models registered as an electric tank at the medium draw pattern, this unit ranks 213th lowest in energy use. Its energy use equals the class median, so it sits in the middle of the class ranking. The listing also gives a first hour rating, the gallons of hot water available in the first hour from a full tank, of 64 gallons. Its rated volume is 52 gallons. The rating covers a busiest hour of up to 64 gallons. A home that needs more hot water in that hour is outside what the rating covers. If you need an electric tank that uses less energy than the class median, this model does not qualify. The same-class replacement search by model number lists other models in this class.

The text does not give a running cost. The cost of 3,531 kWh a year depends on your own utility electricity tariff. The page calculates it from your ZIP and does not estimate it. You can use the water heater cost calculator for your ZIP to apply your rate to this model's 3,531 kWh figure. This model uses the same energy as the class median. So on any rate, its cost equals that of a median-use model in its class at the same test draw. The installed price range appears in its own block with its source and date. It is a modeled installed-cost range, not a quote.