Stiebel Eltron Mini 2.5-1

This site computed the 615 kWh figure; the registry does not list it. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw. This model's UEF is 0.96, from the DOE CCD registry, retrieved 2026-09-19. The class has 271 models registered as an electric tankless unit at the very small draw pattern. Among them, the Stiebel Eltron Mini 2.5-1 ranks 77th lowest in energy use. That places it in the second-lowest quarter of its class for energy use. Its annual figure is also equal to the class median of 615 kWh. The page on how the annual cost is calculated sets out the method step by step.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The Stiebel Eltron Mini 2.5-1 lists a maximum flow rate in gallons per minute of 0.3. If you are checking a replacement for this role, compare it only with the other models in its class of 271. Do not compare it with larger heaters tested at other draw patterns. Its 615 kWh a year and its 77th place are valid only inside that class. A unit from a different draw pattern is measured against a different daily draw, so the figures would not match. To see other models registered in this class, use the same-class replacement search by model number.

The very small draw pattern does not describe a home that needs hot water at several fixtures at once. This data has no annual energy figure for this model at a heavier draw, so that value is not available here. The selector by fuel, space and size lists heaters by other criteria. This text does not state the running cost. It depends on your own utility electricity tariff, applied to 615 kWh a year at the federal test's daily draw. The cost calculator on your own ZIP works out that cost from your ZIP. The modeled installed-cost range has its own block on the page, with its source and date. It is not a quote.