STATE UPVA-35E 1**

The 642 kWh figure is calculated by this site. The registry does not publish it. The calculation starts from the registry's UEF, the ratio of hot water delivered to energy used, which is 0.92 for this model. That ratio is applied to the DOE test's daily hot-water draw for the very small draw pattern. This pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The figure therefore applies at the federal test's draw, not at your household's actual use. If your use differs from the test draw, the figure does not reflect it. The inputs come from DOE CCD, retrieved 2026-09-19. The steps behind the figure are set out on the page explaining how the annual cost is calculated.

The class for this model is the 271 models registered as an electric tankless unit at the very small draw pattern. Among them, it ranks 249th lowest in energy use. That puts it in the highest quarter of its class for energy use, above the median given at the top of this page. The registry lists a maximum flow rate in gallons per minute of 0.4. The draw pattern describes single-bathroom or under-sink use. The data on this page gives no energy figure for any larger draw pattern, so it does not cover heavier household use. To compare lower-energy models in the same class, you can find a same-class replacement by model number.

This text does not state a running cost. The cost depends on your own utility's electricity tariff. The page calculates it from your ZIP by applying your rate to 642 kWh of electricity a year at the test draw. You can run that calculation again with the cost calculator on your own ZIP. At any one rate, this model's cost at the test draw rises with its energy use. At that rate, its cost is higher than a median model's because it uses 27 kWh more energy. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote, and it is separate from the running cost.