EEMAX SPEX1812T

The EEMAX SPEX1812T is an electric tankless unit with a UEF, the ratio of hot water delivered to energy used, of 0.96. This site computed its annual figure of 615 kWh from that UEF and the daily hot-water draw in the DOE test for the very small draw pattern; the registry does not publish the annual figure itself. The DOE CCD data was retrieved on 2026-09-19. The class median is 615 kWh, so the difference is 0 kWh. Its rank is 77th lowest energy use of 271, which places it in the second-lowest quarter of its class. The steps of the calculation are described 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 SPEX1812T has a maximum flow rate in gallons per minute of 0.2, and its 615 kWh applies only to that pattern. A reader with a heater of that kind can compare it directly with the class median of 615 kWh. The figure does not describe a home with several fixtures running together, and the registry data used here gives no annual energy for other draw patterns; those values are not available. For a different size or fuel, the water heater selector filters by fuel, space and size.

The running cost is not written here because it depends on your own electricity tariff. The cost calculator takes your ZIP and applies the local rate to the 615 kWh shown for this model. Because that figure is modeled at the federal test's daily draw, actual use in your building can be higher or lower, and the data does not say by how much. The installed price range appears in its own block with its source and date, as a modeled range and not a quote. If you are matching a unit already in place, you can find a same-class replacement by model number and look at other models registered in this class of 271.