Rheem AM010240T

The 615 kWh figure is electricity use over a year at the federal test's daily hot-water draw for the very small draw pattern. This site computed it, not the registry. The inputs are the registry's UEF, the ratio of hot water delivered to energy used, which is 0.96 for this model, and the DOE test's daily draw for that pattern. The source is DOE CCD, retrieved 2026-09-19. The class median for the 271 electric tankless models at this pattern is 615 kWh, so this model differs from it by 0 kWh. Its energy use ranks 77th lowest of 271, which places it in the second-lowest quarter of its class. The figure is a test-condition value, not a metered reading from any home.

The maximum flow rate in gallons per minute is 0.9 for this model. The very small draw pattern covers small units, such as a single bathroom or a point-of-use heater under a sink, and that is the use the 615 kWh figure describes. It does not describe a household whose hot-water use is larger than the federal test's very small draw. Energy use for other draw patterns is not available on this page, and this site has not estimated it. To compare options by fuel, space and size, use the water heater selector. To find a unit in the same class as AM010240T, use the same-class replacement lookup by model number.

Running cost depends on your own electricity rate, so no cost figure is written in this text. The calculation multiplies the 615 kWh by the tariff that applies to you. The cost calculator on your own ZIP does this, and the method for the annual cost sets out each step. Because this model's energy use equals the class median of 615 kWh, a difference of 0 kWh, its electricity cost at any one rate is the same as the cost of that median energy use. The modeled installed-cost range appears in its own block with its source and date, and it is not restated here. It is a modeled range, not a quote.