Stiebel Eltron DHC 3-2

This site calculates the 609 kWh figure. The registry does not publish it. The calculation 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 pattern. For this unit the UEF is 0.97, and the registry source is DOE CCD, retrieved 2026-09-19. The figure applies only at the federal test's draw. A household that uses more or less hot water than that test will use a different amount of energy, and this data does not give that amount. The method behind the annual figures shows each step. The class covers the 271 models registered as an electric tankless unit at the very small draw pattern. Within that class, this model is in the lowest quarter for energy use.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. This model's maximum flow rate in gallons per minute is 0.3, and its energy figure applies to that use. A plumber or seller checking a quote for one sink or one bathroom can compare the 609 kWh figure with other models at the same draw pattern. The figure does not describe a household that needs hot water at several fixtures at the same time. This data gives no energy value for that case. For higher demand, the selector by fuel, space and size lists other heater types. To check a like-for-like swap, you can find a same-class replacement by model number.

The text on this page gives no running cost. The cost of 609 kWh of electricity depends on your own utility's electricity tariff. For that reason, the page calculates the cost from the ZIP you enter, at the same federal test draw. The cost calculator on your own ZIP applies your rate to this model's figure. Your rate also sets the cost gap to the class median, because it multiplies the 6 kWh energy gap. The money value of that gap is not available here without your tariff. The installed price range on this page is a separate modeled range. It is shown with its own source and date, and it is not a quote.