Stiebel Eltron DHC 12-2 Trend

This site calculates the 603 kWh figure; the registry does not publish it. The calculation uses the registry's UEF, the ratio of hot water delivered to energy used. It also uses the DOE test's daily hot-water draw for the very small draw pattern. For this model the UEF is 0.98, from DOE CCD data retrieved 2026-09-19. The figure holds only at that test draw. A household drawing more or less hot water each day will use a different amount, and that amount is not available here. You can find the steps in how the annual cost is calculated. This model is compared with the 271 electric tankless units registered at this draw pattern. Among them, it sits 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. The 603 kWh figure and the 10th place in its class apply to that use only. The model's maximum flow rate in gallons per minute is 1.2. A household expecting larger daily hot-water use falls outside the conditions behind this figure. Its annual energy in that case is not available here. The rank compares the model only with the 271 units in its own class. It says nothing about gas, tank or larger electric models. To compare across those, use the selector by fuel, space and size. To match an existing unit within the same class, find a same-class replacement by model number.

This text does not state the running cost because it depends on your own utility's electricity tariff. The cost calculator on your own ZIP multiplies the 603 kWh figure by the rate for your area. The 12 kWh gap from the class median works the same way. Its cost value changes with your tariff and appears only in that calculator. Neither result covers hot-water use above the very small test draw. The installed price range appears in its own block on this page, with its source and date. It is a modeled installed-cost range, not a quote. It is also kept separate from the energy data retrieved 2026-09-19.