EEMAX SPEX3277T

The figure of 609 kWh is the electricity EEMAX SPEX3277T uses per year. It applies only to the very small draw pattern, at the federal test's daily hot-water draw. This site computed it, not the registry. The inputs are the registry's UEF, the ratio of hot water delivered to energy used, of 0.97, and the DOE test's daily draw for that pattern. The source is DOE CCD, retrieved 2026-09-19. The class median is 615 kWh, so this model sits 6 kWh below it. The value is a test-based calculation, not a measurement in a real home. The steps are described on the annual cost methodology page.

The comparison group is the 271 models registered as an electric tankless unit at the very small draw pattern. Within that group this model ranks 37th lowest for energy use, which places it in the lowest quarter of its class. The pattern describes small units, such as a single bathroom or a point-of-use heater under a sink. The registry lists the maximum flow rate in gallons per minute as 0.3. A fixture that needs a higher flow than 0.3 falls outside what this listing shows. The energy figure does not describe any larger draw pattern, and no value for those is available here. For a different load, the water heater selector filters by fuel, space and size.

Running cost is not stated as a figure, because it depends on your own utility electricity tariff. Multiply 609 kWh by your rate per kilowatt-hour, or enter your ZIP in the cost calculator to get the result. The 6 kWh difference from the class median of 615 kWh converts to money at that same rate, so its value changes with the tariff. The modeled installed-cost range appears in its own block on this page with its source and date. It is not a quote and is not repeated here. To compare against a same-class unit, find a replacement by model number using SPEX3277T.