Stiebel Eltron DHC-E 8-2 Trend

This site calculates the 603 kWh figure; it is not taken from the registry. 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 the very small draw pattern. This model's UEF is 0.98. The figure describes energy use at the federal test's daily hot-water draw, not in any particular home. It does not describe a home that uses more or less hot water each day than the test assumes. The registry source is DOE CCD, retrieved 2026-09-19. The steps are set out in how this site calculates annual energy and running cost.

The very small draw pattern covers small units: a single bathroom, or a point-of-use heater under a sink. The 603 kWh figure applies to that kind of use. The registry lists a maximum flow rate in gallons per minute of 0.8 for this model. Whether that flow is enough for a given fixture depends on that fixture's own flow rate, which is not available in this data. A home that needs hot water at several outlets at once falls outside what this draw pattern tests. For that home, the 603 kWh figure would not describe actual use. Plumbers and sellers checking a like-for-like swap can find a same-class replacement by model number.

This model is compared with the 271 models registered as an electric tankless unit at the very small draw pattern. It ranks 10th lowest for energy use, which puts it in the lowest quarter of its class. Its figure is 12 kWh below the class median of 615 kWh, with both values at the federal test's daily draw. The running cost is not given in this text because it depends on your own utility electricity tariff. The page calculates it from your ZIP code and does not estimate it. You can also use the cost calculator for your own ZIP. The modeled installed-cost range is shown in its own block with its source and date, and it is not a quote.