VAUGHN ME55

This site computed the 3,531 kWh figure; the registry does not publish it. The inputs are 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 draw pattern. For the ME55, the UEF is 0.92, taken from the DOE CCD and retrieved 2026-09-19. The 3,531 kWh figure holds only at that federal test draw. It does not describe a home whose daily hot-water use differs from the test. The registry does not report actual use in any specific home, so that figure is not available here. The steps behind the annual energy and cost figures show how the UEF and the test draw combine.

The first hour rating, the gallons of hot water available in the first hour from a full tank, is 64 gallons for this model. Its rated volume is 52 gallons. The medium draw pattern stands for a typical household's daily use, including a busy morning. A home whose busiest hour needs no more than 64 gallons falls within what this rating covers. A home whose busiest hour needs more than 64 gallons falls outside it. The class comparison covers only electric tank models at the medium draw pattern. Other fuels and heater types are not ranked against this model on this page. The selector by fuel, space and size covers those other options.

Running cost is not stated in this text. It depends on your own utility electricity tariff, which this page does not know in advance. The page computes it from your ZIP code instead, using the 3,531 kWh test figure. The cost calculator for your own ZIP runs the same calculation at other rates. Because this model's use equals the class median of 3,531 kWh, its running cost at any given rate matches that of a median model in its class. The modeled installed-cost range appears in its own block, with its source and date. That range is a model, not a quote, and it is not restated here.