RELIANCE WATER HEATERS PESX-50 1**

This site computed the 3,531 kWh figure; the registry does not list it. The calculation uses the model's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the medium pattern. This unit's UEF is 0.92. The inputs come from the DOE CCD, retrieved 2026-09-19. The figure therefore holds only at the federal test's daily draw, not at any one household's actual use. A home whose daily hot-water use differs from the medium pattern will see a different annual figure. How much it differs for a given home is not available here, because the registry records only the test result.

Within its class, the model ranks 213th lowest in energy use of 426, which places it in the second-lowest quarter. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 70 gallons. That comes from a rated volume of 46 gallons. The rating covers a household whose hot-water use in the first hour stays within 70 gallons. The rating does not cover a household that regularly draws more than that in the first hour. If you are checking a unit to swap in, you can find a same-class replacement by model number. If you are still comparing fuels or tank sizes, the water heater selector by fuel, space and size lists other options.

This text does not state a running cost. The cost depends on the reader's own utility electricity tariff. The page therefore works it out from the reader's ZIP, using the 3,531 kWh figure. The cost calculator on your own ZIP shows that result, and how the annual cost is calculated explains each step. A cost on the reader's rate still rests on the medium pattern at the federal test's daily draw. It has the same limit described above for the energy figure. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote from an installer.