RELIANCE WATER HEATERS ENL-50 1**

This site calculates the 3,531 kWh figure. It is not taken directly from the registry. It combines the model'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. The registry lists a UEF of 0.92 for this model in the DOE CCD, retrieved 2026-09-19. So the annual figure applies only at the federal test's daily draw. A home that uses more or less hot water than on that test day will use a different amount of electricity. The data does not show how far real use differs from the test. The steps behind this conversion are explained in how this site calculates annual energy and cost.

The medium draw pattern stands for a typical household on a busy morning, as the DOE test defines it. This unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 51 gallons. Its rated volume is 48 gallons. Both figures describe what the tank delivers under test conditions. On that basis, the rating covers a household whose busiest hour uses no more than 51 gallons. A household that often needs more in its busiest hour falls outside what this rating covers. The data does not describe how the unit performs beyond that point. To compare other fuels or sizes, use the water heater selector by fuel, space and size.

This model is compared with the 426 models registered as an electric tank at the medium draw pattern. Its annual energy is 0 kWh away from the class median of 3,531 kWh. At 213th lowest, it falls in the second-lowest quarter of its class for energy use. The running cost is not given here because it depends on your own utility's electricity rate. The page calculates it from your ZIP instead, using the same 3,531 kWh at the medium draw pattern. You can get that result from the running-cost calculator for your ZIP. The installed price range is in its own block, with its source and date. That range is modeled and is not a quote.