Stiebel Eltron DHC-E 3-1 Trend

This site calculates the 597 kWh figure; the registry does not publish it. The calculation combines the model's UEF, the ratio of hot water delivered to energy used, of 0.99 with the DOE test's daily hot-water draw for the very small draw pattern. The registry inputs come from the DOE CCD, retrieved 2026-09-19. The figure holds only at that test draw. This data gives no energy use at other daily draws. Among the 271 electric tankless models registered at this draw pattern, the DHC-E 3-1 Trend ranks 3rd lowest for energy use. That puts it in the lowest quarter of its class. The steps behind the calculation are on the page explaining 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 this model's maximum flow rate in gallons per minute as 0.3. Together, that rate and the draw pattern set the scope of use the test covers. A home that needs hot water at several fixtures at the same time is outside this draw pattern. The 597 kWh figure does not describe that use. This page does not record whether a given fixture's flow fits within 0.3. That depends on the fixture itself. For a unit in a different class, the water heater selector by fuel, space and size lists the other classes.

The text on this page gives no running cost. What 597 kWh of electricity a year costs depends on your own utility tariff. For that reason, the page calculates it from your ZIP code and does not estimate it. The running-cost calculator for your ZIP code applies your local electricity rate to this model's 597 kWh at the very small draw pattern. The 18 kWh gap to the 615 kWh class median also becomes a cost difference only at your own rate. The installed price range appears in its own block, with its source and date. It is a modeled range, not a quote. To match a replacement, use the same-class replacement search by model number.