Aquapower Mini 6-2

The figure of 628 kWh is computed by this site, not published by the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.94 with the daily hot-water draw that the DOE test assigns to the very small draw pattern. The source is DOE CCD, retrieved 2026-09-19. Because the result rests on that assumed daily draw, actual household use can differ, and this page cannot say by how much. The method for the annual cost is documented separately. Among the 271 electric tankless models at this draw pattern, the median is 615 kWh, so this unit sits 13 kWh higher. Its rank of 188th lowest places it in the second-highest quarter of its class for energy use.

The very small draw pattern covers small units, such as a single bathroom or a point-of-use heater under a sink. The registry lists a maximum flow rate in gallons per minute of 0.6 for this model. The comparison holds only for that draw pattern. A household with heavier hot-water use falls outside the 271 models compared, and the figure of 628 kWh does not describe it. Whether the gap of 13 kWh above 615 kWh matters is not something the data settles: it is a difference in electricity use at the federal test's draw, and nothing more. Readers who need a different fuel, space or size can start from the water heater selector.

The running cost is not stated in the text, because it depends on the reader's own utility electricity tariff. The cost calculator takes the reader's ZIP and applies the local rate to the 628 kWh shown here. That calculation inherits the same condition as the energy figure: the very small draw pattern at the federal test's daily draw. The modeled installed-cost range appears in its own block with its source and date, as a range and not a quote, so it is not restated in this text. To compare against another model in the same class, find a same-class replacement by model number and check its figure against the class median of 615 kWh.