EEMAX SPEX35

The registry lists UEF, the ratio of hot water delivered to energy used, as 0.95 for the EEMAX SPEX35. This site computed 622 kWh a year 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 source is DOE CCD, retrieved 2026-09-19. The class is the 271 models registered as an electric tankless unit at this draw pattern. Its median is 615 kWh, so this unit sits 7 kWh above it. Its rank is 152nd lowest energy use of 271, in the second-highest quarter of the class. The calculation is described on the methodology page.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The registry lists a maximum flow rate in gallons per minute of 0.4 for this model. Those two facts match the small installations the draw pattern describes, and the 622 kWh figure applies only to that test draw. A household with heavier or more frequent use would not match it, and this page has no data for other draw patterns. The 7 kWh gap to the class median of 615 kWh is the only comparison shown here. It says nothing about use outside the test. To compare other fuels, spaces and sizes, use the water heater selector, or find a same-class replacement by model number.

The running cost is not stated in this text because it depends on your own utility electricity tariff. The annual energy of 622 kWh is the quantity to multiply by your rate, and it holds only at the very small draw pattern. The cost calculator applies the rate for your ZIP to that figure. A different rate changes the cost but not the 7 kWh difference from the class median, because that gap is measured in energy. The modeled installed-cost range appears in its own block with its source and date. It is a range, not a quote, and it is not repeated here. Measured household consumption is not in the registry, so the figure reflects the data retrieved on 2026-09-19.