RELIANCE WATER HEATERS ENT-55 1**

The 3,493 kWh figure is computed by this site, not published by the registry. 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. This model's UEF is 0.93, so the figure holds only at that test draw. A household drawing more hot water each day would use more electricity. The data does not give the amount for any other draw. The source is the DOE CCD, retrieved 2026-09-19. The page on how the annual energy and cost are calculated sets out each step.

Within its class, the 3,493 kWh sits 38 kWh below the median of 3,531 kWh. The class is the 426 models registered as an electric tank at the medium draw pattern. Among them, this model ranks 153rd lowest in energy use. The figure describes a household whose daily hot-water use is close to the medium draw pattern. For peak demand, the relevant value is the first hour rating, the gallons of hot water available in the first hour from a full tank. Here it is 72 gallons, from a rated volume of 55 gallons. A household needing more than 72 gallons in its busiest hour is not covered by this rating. To check other models in the same class, use the same-class replacement search by model number.

This text does not state the running cost. It equals 3,493 kWh of electricity multiplied by the reader's own utility tariff, and that tariff is not in the registry. The running-cost calculator for your ZIP applies your local electricity rate to this model's 3,493 kWh. The same condition carries over: the result holds at the medium draw pattern's daily draw, not at a household's measured use. The gap of 38 kWh below the class median becomes a cost difference only once a rate is applied. The installed price shown in its own block on this page is a modeled range with its source and date, not a quote. What this model costs to run in a specific home remains unknown until that home's rate and actual use are known.