Stiebel Eltron DHC 8-2 Trend

This site calculated the 597 kWh figure. The registry did not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with a DOE test value. That value is the daily hot-water draw set for the very small draw pattern. For this model the registry lists a UEF of 0.99. The registry source is DOE CCD, retrieved 2026-09-19. The annual figure applies only at that federal test draw. Hot-water use above or below that daily draw is not covered by it, and this page has no figure for it. Each step of the calculation is described on the page explaining 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 a maximum flow rate in gallons per minute of 0.7 for this model. Among the 271 electric tankless units registered at this draw pattern, its 597 kWh places it in the lowest quarter for energy use. The comparison covers no other draw pattern and no other fuel. It therefore does not show how this unit would serve a household drawing hot water at several outlets. For other sizes and fuels, the water heater selector by fuel, space and size filters by those terms. To match this model with another unit in the same class, use the same-class replacement search by model number.

The text on this page does not state a running cost. The cost of 597 kWh a year depends on your own utility's electricity tariff. The page therefore works it out from your ZIP in the cost calculator for your own ZIP. That calculation uses the same very small draw pattern figure described above. This model's use sits 18 kWh below its class median. What that gap costs or saves you depends on the same rate, so this text gives no amount for it. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote.