Lennox WHES050T45TN240S****

This site calculated the 3,531 kWh figure; the registry does not list it. The figure combines the listed UEF, the ratio of hot water delivered to energy used, of 0.92 with the DOE test's daily hot-water draw for the medium draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure applies only at that test draw. It does not describe a household whose daily hot-water use differs from the test draw. The unit ranks 213th lowest energy use of 426 electric tanks at the medium draw pattern. Its energy use matches the class median, a difference of 0 kWh. The method is set out in how the annual cost is calculated.

The registry lists a rated volume of 45 gallons. It also lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 65 gallons. The medium draw pattern represents a typical mid-sized household, and the energy figure assumes that level of use. A household whose busiest hour stays within 65 gallons falls inside the capacity that the rating describes. A household whose peak hour needs more than 65 gallons falls outside it. The data here does not show how the unit performs in that case. For a plumber or seller checking a match, the listing places this model among 426 electric tanks at the medium draw pattern. The same-class replacement search by model number lists other models in that class.

This text gives no running cost. The cost of 3,531 kWh of electricity a year depends on your own utility tariff, and the registry data does not include that rate. The cost calculator for your own ZIP applies your local rate to the 3,531 kWh figure at the medium draw pattern. This unit uses the same energy as the class median of 3,531 kWh. At any given rate, its running cost therefore matches that of a median model in its class at the same draw. The installed price elsewhere on this page is a modeled range, not a quote, and its own block shows its source and date. Anything beyond the listed UEF of 0.92, the rated volume and the first hour rating is not available here. That includes energy use at a different daily draw.