GE GE40T10BAM02

The figure of 3,531 kWh is not read directly from the registry. This site computed it from the registry's UEF of 0.92 and the DOE test's daily hot-water draw for the medium draw pattern, which is a typical household on a busy morning. UEF, the ratio of hot water delivered to energy used, is the efficiency input, and the fuel is electricity. The source is DOE CCD, retrieved 2026-09-19. Among the 426 models registered as an electric tank at the medium draw pattern, this unit sits at the class median of 3,531 kWh, a difference of 0 kWh. Its rank of 213th lowest places it in the second-lowest quarter of its class for energy use. The calculation method explains each step.

This model has a rated volume of 40 gallons and a first hour rating of 63 gallons. The first hour rating is the gallons of hot water available in the first hour from a full tank. Together with the medium draw pattern, these values describe a household whose hot-water use resembles the federal test's typical household. A household with a different daily draw would use a different amount of energy, and the registry data does not give that figure. The data also does not show how this unit performs in a specific home. To compare other sizes or fuels, the water heater selector filters by fuel, space and size.

The running cost is not written here because it depends on your own utility electricity rate. Multiply your rate per kilowatt-hour by 3,531 kWh to get a yearly figure at the medium draw pattern. The cost calculator does this from your ZIP. Because this model equals its class median, with a difference of 0 kWh, a change in your rate moves its cost in the same proportion as it would for a median model in the class. The modeled installed-cost range appears in its own block on the page, with its source and date, and is not repeated here. To look for a same-class model by number, use the replacement lookup.