Rheem SPEX95T

This site computed the 603 kWh figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used, which is 0.98 for this unit. It also uses the DOE test's daily hot-water draw for the very small pattern. The UEF comes from the DOE CCD, retrieved on 2026-09-19. The figure holds only at that test draw. This page does not have energy use for a home whose daily hot-water use differs from the test. The 12 kWh gap to the class median of 615 kWh uses the same test conditions for every model, so it compares like with like. The full method is set out in how the annual cost is calculated.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The registry lists this unit's maximum flow rate in gallons per minute as 0.9. Together, that rating and the draw pattern describe the use the federal test assumes. Hot-water use beyond a single bathroom or sink falls outside the very small pattern. For that kind of use, the 603 kWh figure does not describe this unit. To look at models rated at other draw patterns, use the water heater selector by fuel, space and size. To compare this unit with other electric tankless units at the same pattern, use the same-class replacement search by model number.

The text on this page does not state a running cost. The cost of 603 kWh of electricity a year depends on your own utility's electricity tariff. The page works it out from your ZIP in the cost calculator for your own ZIP. The unit is in the lowest quarter of its class for energy use. At any single electricity rate, the 12 kWh gap to the 615 kWh median lowers the cost in proportion to that gap. What that gap is worth in money depends on your rate, so this page does not give it. The installed-price block shows a modeled installed-cost range with its own source and date, and that range is not a quote.