EEMAX SPEX90T

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.98 for this model. This site, not the registry, computed the annual figure of 603 kWh from that UEF and the DOE test's daily hot-water draw for the very small draw pattern. The fuel is electricity, and the source is DOE CCD, retrieved 2026-09-19. The class is the 271 models registered as an electric tankless unit at this draw pattern. Their median is 615 kWh, so this model sits 12 kWh below it. Its rank of 10th lowest places it in the lowest quarter of the class for energy use. The comparison holds only at the test's daily draw.

The figure applies to small units, meaning a single bathroom or a point-of-use heater under a sink. The registry gives a maximum flow rate in gallons per minute of 0.9 for this model. A household whose real hot-water use differs from the test's daily draw should not expect 603 kWh as its own total, because the figure describes the test and not the home. Temperature rise and incoming water temperature are not available in the data used here, so the page does not estimate flow at a given rise. To compare against other fuels, space limits or sizes, use the water heater selector. To check a same-class alternative, use replacement search by model number.

The running cost is not written in this text because it depends on your own utility electricity tariff. The page multiplies the annual energy of 603 kWh by your rate, and the cost calculator does this from your ZIP. The steps behind that calculation are set out in the methodology for water heater costs. The 12 kWh gap to the class median of 615 kWh is also in energy, not money, so its cost effect depends on the same rate. The modeled installed-cost range appears in its own block with its source and date. It is a modeled range, not a quote, and it is not restated here.