Stiebel Eltron DHC 8-2

This site computed the 615 kWh figure. The registry does not list it. It combines two inputs. The first is the registry's UEF, the ratio of hot water delivered to energy used, which is 0.96 for this unit. The second is the DOE test's daily hot-water draw for the very small draw pattern. The source is the DOE CCD, retrieved 2026-09-19. Among the 271 models registered as an electric tankless unit at this draw pattern, the DHC 8-2 ranks 77th lowest in energy use. That places it in the second-lowest quarter of its class. The figure holds only at the test's daily draw. A figure for other usage levels is not available here. The method behind the annual energy and cost figures sets out each step.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The DHC 8-2 is registered with a maximum flow rate in gallons per minute of 0.7. A plumber or seller checking a listing can match that rate and the UEF of 0.96 against the registry entry. The 615 kWh figure applies only to use at that small scale. The data here does not show how the unit performs against a larger draw pattern, so that result is not available. A home that needs hot water at more than one outlet at a time falls outside the pattern this figure describes. To compare other units by fuel, space and size, use the water heater selector.

The running cost is not stated in this text. The cost of 615 kWh a year depends on your own utility's electricity tariff. The page computes it from your ZIP in the running cost calculator for your ZIP. The unit's use differs from the class median by 0 kWh. On the same rate, a model at the class median would therefore show the same test-based cost. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote. If you need a same-class replacement, the replacement finder by model number lists models registered as an electric tankless unit at the very small draw pattern.