Aquapower DHC 10-2

The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.94 for the Aquapower DHC 10-2, an electric tankless unit. This site, not the registry, computed the annual figure of 628 kWh. It used that UEF and the DOE test's daily hot-water draw for the very small draw pattern. The figure therefore describes the test draw only, and a home that draws more or less hot water will use a different amount. The source is DOE CCD, retrieved 2026-09-19. Against the 271 models in the same class, the unit sits 13 kWh above the class median of 615 kWh, in the second-highest quarter of its class for energy use.

The very small draw pattern stands for 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 1 for this model. For a reader with that kind of small load, 628 kWh is the test value to compare against the class median of 615 kWh. For a reader with a larger load, this page gives no basis for judgment. The registry data used here contain no figure for other draw patterns, so the annual energy for them is not available. The selector by fuel, space and size is one route to other options, and the same-class replacement search by model number lists models in this class.

The running cost is not written here because it depends on your own utility electricity rate. The annual energy of 628 kWh is the quantity to multiply by that rate, and the cost calculator on your own ZIP applies the local tariff to it. The method is described on the page about how the annual cost is calculated. A modeled installed-cost range appears in its own block on this page with its source and date. It is a range, not a quote, and it is not repeated here. The rank of 188th lowest energy use among 271 models, and the difference of 13 kWh from the median, both apply only to the very small draw pattern.