STATE UPVA-45E 1**

This site calculated the 642 kWh figure; the registry does not state it. The figure combines the registry's UEF, the ratio of hot water delivered to energy used, of 0.92 with the DOE test's daily hot-water draw for the very small draw pattern. The registry data come from the DOE Compliance Certification Database (CCD), retrieved 2026-09-19. The class is the 271 models registered as an electric tankless unit at this draw pattern. Within that class, this model ranks 249th lowest in energy use. That puts it in the highest quarter of its class for energy use. The figure holds only at the federal test's daily draw. A household that draws more or less hot water will use a different amount. The steps are set out in how the annual cost is calculated.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The registry lists this model's maximum flow rate in gallons per minute as 0.5. If you are checking whether it fits a job, the 642 kWh figure describes that small-use case only. It does not describe a unit serving several fixtures at once. The federal test did not rate this model at a larger draw pattern. For that reason, its annual energy at a larger draw is not available in this data. The replacement finder by model number lists same-class models. They share the very small draw pattern and belong to the same comparison of 271 models.

The text on this page states no running cost. That cost depends on your own utility electricity tariff, and this data does not include it. Instead, the page works out the cost from your ZIP, using the 642 kWh yearly figure. The cost of the 27 kWh gap above the 615 kWh class median also depends on your tariff. To apply the figure to your own rate, use the cost calculator for your ZIP. The modeled installed-cost range appears in its own block with its source and date. That range is a model, not a quote.