RELIANCE WATER HEATERS ENLB-50 1**

The DOE Compliance Certification Database does not list the 3,493 kWh figure. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used. It also used the DOE test's daily hot-water draw for the medium pattern. The registry lists a UEF of 0.93 for this model, retrieved 2026-09-19. The figure holds only at that test draw. A household that draws more hot water each day would use more electricity, and one that draws less would use less. This page cannot say how much more or less, because the registry gives no figures for other usage levels. The page on how the annual cost is calculated sets out the full method.

The registry lists a rated volume of 44 gallons for this model. It also lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 60 gallons. The medium draw pattern represents a typical household's daily use, including a busy morning. A home whose first-hour demand stays within 60 gallons matches the conditions behind the 3,493 kWh figure. A home that needs more hot water in its first hour is outside the conditions this rating covers. The registry does not report how the unit performs above that level, so that is unknown. To compare other units by fuel, space and size, use the water heater selector by fuel, space and size.

This text does not give a running cost, because the cost depends on your own utility's electricity tariff. The cost calculator for your own ZIP works it out from your rate and the 3,493 kWh figure at the medium draw pattern. The 38 kWh gap to the class median, given above, puts this model in the second-lowest quarter of its 426-model class for energy use. That position applies only at the federal test's daily draw, not at your household's actual use. If you are checking a like-for-like swap, you can find a same-class replacement by model number.