Lennox WHES050L45TN240S****

This site calculated the 3,493 kWh figure; it does not come from 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 unit's UEF is 0.93. The registry data comes from the DOE Compliance Certification Database, retrieved 2026-09-19. The medium draw pattern represents a typical mid-sized household on a busy morning. If your household uses more or less hot water than the test day assumes, your actual annual use will differ from 3,493 kWh. The registry does not say by how much. The page on how the annual figure and cost are calculated explains each step.

Among the 426 electric tank models at the medium draw pattern, this model ranks 153rd lowest in energy use. Its gap to the class median is 38 kWh a year, measured at the federal test's daily draw. The rated volume is 42 gallons. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 52 gallons. A household whose busiest hour stays within 52 gallons fits the conditions behind these figures. A household that regularly needs more water in its peak hour falls outside those conditions, and this page has no figure for that case. To compare units by fuel, space and size, use the water heater selector.

This text gives no running cost. The cost of 3,493 kWh of electricity depends on your own utility tariff, which varies by provider and rate plan. The cost calculator for your own ZIP applies your local electricity rate to this model's annual use at the medium draw pattern. The installed-price block on this page shows a modeled installed-cost range, not a quote, with its own source and date. If you need a unit in the same class to replace this model, you can find a same-class replacement by model number. Models outside the electric tank class, or tested at a different draw pattern, are not part of the 426-model comparison on this page.