Aquapower Tempra 12

The 635 kWh figure is not a meter reading from a home. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.93 for the Aquapower Tempra 12. It also used the DOE test's daily hot-water draw for the very small draw pattern. That condition matters: at a different daily use, the yearly energy would differ, and this page gives no figure for that case. The source is the DOE CCD, retrieved 2026-09-19. The registry also lists a maximum flow rate in gallons per minute of 1.2. The derivation of the yearly figure is described in the methodology for water heater costs.

Against its class, the Aquapower Tempra 12 sits 20 kWh above the class median of 615 kWh. The class is the 271 models registered as an electric tankless unit at the very small draw pattern. This model ranks 218th lowest in energy use, which places it in the highest quarter of its class for energy use. The draw pattern describes small units, such as a single bathroom or a point-of-use heater under a sink, so the comparison holds for that kind of use. It does not describe a unit that serves a whole household. The data here does not say whether a lower-use model in the class has the same maximum flow rate of 1.2. To look at same-class alternatives, use the same-class replacement finder by model number.

The running cost is not written out here because it depends on your own utility electricity tariff, which depends on your ZIP. The yearly energy of 635 kWh is the fixed part; your rate per kilowatt-hour is the variable part. Enter your ZIP in the cost calculator to get the running cost for this model at your own rate. The 20 kWh gap above the 615 kWh median applies at the test draw, and its cost also depends on that rate. The installed-cost range appears in its own block on this page, with its source and date, as a modeled range and not a quote. If fuel, space or size is still open, the water heater selector covers those inputs.