STATE UPVA-24K 1**

This site, not the registry, computed the 635 kWh figure for this model. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the test's daily draw. For this model the UEF is 0.93, and the source data come from DOE CCD, retrieved 2026-09-19. The result therefore holds at that federal test draw, not at your household's own daily usage. Among the 271 models registered as an electric tankless unit at the very small draw pattern, this one ranks 218th lowest for energy use. That rank puts it in the highest quarter of its class for energy use. The steps behind the figure and the cost appear on our page on how the annual cost is calculated.

The very small draw pattern stands for small units: a single bathroom, or a point-of-use heater under a sink. The registry lists its maximum flow rate in gallons per minute as 0.2 for this model. The figures on this page cover only that draw pattern, so they do not describe a larger household's use. Given the rank shown above, most registered models in the same class use less energy at this draw pattern. To check same-class alternatives, you can find a same-class replacement by model number. For another fuel, space or size, the selector by fuel, space and size covers other classes.

The page does not state a running cost in this text, because it depends on your own utility electricity tariff. The page computes it from your ZIP, starting from the 635 kWh yearly figure at the very small draw pattern. At any single electricity rate, its 20 kWh gap above the class median carries through to a higher cost than a median model's. Your actual use may differ from the federal test's daily draw, and this page does not know your household's usage. To see the cost on your own tariff, use the cost calculator for your own ZIP. The installed price range appears in its own block, as a modeled range with its source and date, not a quote.