Aquapower Mini -E 3-1

This site computed the 609 kWh figure; the registry does not publish it. The calculation combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the very small draw pattern. This model's UEF is 0.97. It ranks 37th lowest for energy use among the 271 models registered as electric tankless units at this draw pattern. That places it in the lowest quarter of its class. The inputs come from the DOE CCD, retrieved 2026-09-19. The method behind the annual energy and cost figures explains each step and its source. The registry data does not show how the figure changes with real household use.

The very small draw pattern covers small units, such as a heater for a single bathroom or a point-of-use heater under a sink. The Aquapower Mini -E 3-1 lists a maximum flow rate in gallons per minute of 0.3. The 609 kWh figure describes use at this draw pattern only. It does not describe a household that needs hot water at multiple fixtures at the same time. That kind of home falls under a larger draw pattern, which this registry entry does not cover. The water heater selector by fuel, space and size lists other classes. You can compare this unit against models in the same class with the same-class replacement search by model number.

This text does not state a running cost, because it depends on your own electricity tariff. The page calculates it from your ZIP by applying your rate to the 609 kWh this unit uses at the federal test's daily draw. On a flat per-kWh tariff, the 6 kWh gap to the class median changes cost by the same proportion. If your real use differs from the very small draw pattern, the energy figure will change too. The registry data does not say by how much. The running cost calculator for your ZIP gives the figure for your own rate. The modeled installed-cost range appears in a separate block, with its source and date.