Stiebel Eltron DHC 4-2

This site computed the 622 kWh figure. The registry does not publish it. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for this draw pattern. For the DHC 4-2, the UEF is 0.95, from DOE CCD data retrieved on 2026-09-19. The 271 models registered as electric tankless units at the very small draw pattern are ranked by energy use, and this model is 152nd lowest. That places it in the second-highest quarter of its class for energy use. The figure holds only at the federal test's daily draw, and the site has no estimate for other usage levels. The steps are set out in how the annual energy and cost figures are 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 0.4 for the DHC 4-2. Its 622 kWh figure and its 152nd rank both describe that kind of use. A reader checking the model for one sink or one small bathroom is comparing it under the conditions it was tested in. A reader who needs hot water at several fixtures at once is outside those conditions, and this page gives no figure for that case. For a different use, the selector by fuel, space and size sorts models by those needs. To compare this unit with others in its own class, use the same-class replacement search by model number.

This text does not give a running cost, because that cost depends on your own utility electricity tariff. The page works it out from your ZIP in the cost calculator on your own ZIP. On any one tariff, the cost gap to a median model comes from the 7 kWh a year of electricity that separates this unit from the 615 kWh class median. No cost is stated here for usage above or below the federal test's daily draw. The installed-price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote, and this text does not repeat its figures.