EEMAX SPEX4208

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.97 for the EEMAX SPEX4208. This site computed the 609 kWh figure from that UEF and the daily hot-water draw DOE uses for the very small draw pattern. The registry does not publish an annual figure itself. The source is DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw, and energy use in a home changes with how much hot water is actually drawn. The calculation steps are set out in the methodology for annual water heater figures.

The 609 kWh figure is 6 kWh below the class median of 615 kWh. That places the unit 37th lowest of 271 electric tankless models at this draw pattern, in the lowest quarter of its class for energy use. The gap to the median is small, so at the test draw this model differs from a typical one in its class by only 6 kWh a year. Its maximum flow rate in gallons per minute is 0.4. That matches small units, such as a single bathroom or a point-of-use heater under a sink. It does not match a home that needs hot water at several fixtures at once, and the data here do not cover larger draw patterns. A selector by fuel, space and size covers those cases.

The running cost is not written in the text, because it depends on your own utility electricity tariff. The 609 kWh figure is the quantity to multiply by your rate per kWh. The cost calculator does that from your ZIP. The installed price range appears in its own block with its source and date, as a modeled installed-cost range and not a quote, so it is not restated here. To compare the 615 kWh class median or another unit against this EEMAX SPEX4208, you can find a same-class replacement by model number. Actual household use and your local rate are not known to this page.