Stream 33 MEWH40S82S1

The registry does not print the 3,531 kWh figure. This site calculated it from two inputs: the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the medium pattern. For this model the UEF is 0.92, taken from DOE CCD data retrieved 2026-09-19. The medium pattern stands for a typical household's busy morning under the federal test. If your household uses more or less hot water than that test day, your actual use will differ from 3,531 kWh. The figure is for comparing models under the same conditions. It does not predict the meter reading in a specific home. The steps are set out on the page on how the annual cost is calculated.

The unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 55 gallons from a rated volume of 37 gallons. That output matches the morning demand the medium pattern describes. A household whose peak morning use stays within 55 gallons fits the test conditions behind 3,531 kWh. A household that regularly needs more hot water in its first hour falls outside those conditions. This page has no energy figure for this model at a heavier draw pattern, so that value is not available here. To compare other units against your own needs, use the water heater selector by fuel, space and size.

For a plumber or seller verifying a claim, the class position is the main check. At 0 kWh from the 3,531 kWh class median, this model's energy use matches the median of its class. Its rank of 213th lowest of 426 is where that median falls. The running cost is not stated in this text because it depends on your own utility's electricity tariff. The cost calculator on your own ZIP applies your local rate to 3,531 kWh. The installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote. To match this unit with another model in the same class, use find a same-class replacement by model number.