VAUGHN THERMAL ME50

The 3,531 kWh figure was calculated by this site. The registry does not publish it. The calculation combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw. The registry lists a UEF of 0.92 for this model in the DOE Compliance Certification Database, retrieved on 2026-09-19. The annual figure holds only at the daily volume of the medium draw pattern. It does not describe a home whose daily hot-water use differs from that test draw. This data does not show how far real use would change the figure. The steps behind the calculation are on the page explaining how this site calculates annual energy and running cost.

The medium draw pattern represents a typical household with a busy morning. This model's first hour rating, the gallons of hot water available in the first hour from a full tank, is 56 gallons. Its rated volume is 47 gallons. A home whose morning peak stays within 56 gallons is within what this unit can supply in its first hour. A home whose peak runs above that figure is outside it, and the annual figure does not describe that home. Among the 426 models in its class, this one ranks 213th lowest for energy use. To check other units in the same class, use the same-class replacement search by model number.

This text gives no running cost because the cost depends on your own utility's electricity tariff. The page calculates it from your ZIP by applying your rate to the 3,531 kWh test-draw figure. Enter your ZIP in the water heater running cost calculator to see the result. This model sits 0 kWh from the class median. On the same tariff, a model at the class median would show the same test-draw cost. The installed-price block on this page shows a modeled range with its own source and date. It is not a quote, and this text does not repeat its figures.