Lennox WHES050S45TD240S****

The 3,531 kWh figure does not come from the registry itself. This site calculated it from two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.92 for this model. The second is the DOE test's daily hot-water draw for the medium pattern. The registry values come from the DOE CCD, retrieved 2026-09-19. The figure only holds at the federal test's daily draw. A household that uses more or less hot water than the test will use a different amount of energy. This page cannot state that amount. The steps behind the figure are set out in how the annual cost is calculated.

This model was compared with the 426 models registered as an electric tank at the medium draw pattern. Its use of 3,531 kWh is equal to the class median of 3,531 kWh. It ranks 213th lowest for energy use, which puts it in the second-lowest quarter of its class. The medium pattern represents a typical household with a busy morning. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 61 gallons. Its rated volume is 46 gallons. A household whose peak hour needs more than 61 gallons does not match the conditions these figures describe. A plumber or seller checking a like-for-like swap can find a same-class replacement by model number.

No running cost is stated in this text. The cost of 3,531 kWh of electricity a year depends on the reader's own utility tariff. The tariff varies by utility and by plan, so any single figure would be an estimate. The cost calculator on your own ZIP applies your area's electricity rate to this model's annual energy at the medium draw pattern. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. Neither figure covers hot-water demand above the medium draw pattern or electricity rates that change during the year. Both of those are unknown for any single home.