Stiebel Eltron DHC-E 12-2 Trend

This site calculates the 615 kWh figure; the registry does not publish 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 for the very small draw pattern. The registry lists a UEF of 0.96 for this model in the DOE CCD, retrieved on 2026-09-19. The result applies only at that test draw. A household that draws more or less hot water each day will use a different amount of electricity. The page on how the annual energy and cost figures are calculated sets out each step. The class used here has 271 models registered as electric tankless units at this draw pattern, and this model differs from their median by 0 kWh.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. That is the use behind the 615 kWh figure. The registry lists a maximum flow rate in gallons per minute of 1.2 for this model. The figure does not describe a household whose hot-water demand goes beyond this draw pattern or this flow rate. The data here does not show how the unit performs under those conditions. If you are checking a swap, you can find a same-class replacement by model number among the 271 units in this class. To compare a different fuel, space or size, use the water heater selector by fuel, space and size.

The text on this page gives no running cost. The cost of 615 kWh a year depends on the electricity tariff of your own utility. The page therefore works it out from your ZIP and does not estimate it. The running cost calculator for your ZIP applies your local rate to the same test-draw figure of 615 kWh. This model's energy use equals the class median of 615 kWh, a difference of 0 kWh. At the same rate, a model at the class median would therefore show the same running cost. The installed price range appears in its own block with its source and date. It is a modeled range of installed costs, not a quote.