EEMAX SPEX80

The figure of 615 kWh for this electric tankless unit is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, which is 0.96 for this model, with the DOE test's daily hot-water draw for the very small draw pattern. The source is the DOE CCD, retrieved 2026-09-19. The figure holds only under that test condition. A household that draws more or less hot water than the test assumes will use a different amount. The registry also lists a maximum flow rate in gallons per minute of 0.8 for this model. That is a rated flow limit, and it is not an input to the energy figure.

Among the 271 models registered as an electric tankless unit at the very small draw pattern, this one has the 77th lowest energy use of 271. That places it in the second-lowest quarter of its class. Its 615 kWh equals the class median of 615 kWh, so the difference from the median is 0 kWh. The comparison holds only inside that class of small units, such as a single bathroom or a point-of-use heater under a sink. It says nothing about other draw patterns or other fuels. To look at other models in the same class, you can find a same-class replacement by model number.

The energy figure of 615 kWh describes the small-unit use the very small draw pattern represents. It does not describe a household whose hot-water use is larger than that pattern, and this data gives no figure for such a case. The running cost is not stated here because it depends on your own utility electricity tariff. The cost calculator on your own ZIP applies that rate to the 615 kWh figure, and how the annual cost is calculated sets out the steps. The modeled installed-cost range appears in its own block on this page with its source and date. For other fuels, spaces or sizes, use the water heater selector.