Mizudo ET011

The 628 kWh figure comes from this site's calculation, not 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 pattern. For the ET011, the registered UEF is 0.94. The registry values come from the DOE CCD, retrieved on 2026-09-19. The figure applies only at the federal test's daily draw. It does not describe a household whose daily hot-water use differs from that test draw. The registry does not report this model's energy use at any other level of use, so that is not available here. The conversion steps are explained in how the annual cost is calculated.

The very small draw pattern covers small units. These serve a single bathroom, or work as a point-of-use heater under a sink. The Mizudo unit's registered maximum flow rate in gallons per minute is 1.2. Among the 271 electric tankless models at this draw pattern, it ranks 188th for lowest energy use. That places it in the second-highest quarter of its class for energy use. Its 628 kWh does not describe demand larger than this draw pattern, because the model was not tested at a larger one. To compare other models by fuel, space and size, use the selector by fuel, space and size. To match this model number against same-class units, use find a same-class replacement by model number.

This text gives no running cost for the ET011. The cost depends on your own utility's electricity rate. The page works it out from your ZIP, applying that rate to the 628 kWh at the federal test's draw. What that 13 kWh gap above the class median costs also depends on your rate. So the cost gap is not stated here. You can run the same figure through the cost calculator on your own ZIP. The installed price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote. This page has no data on energy use outside the DOE test draw, so that is unknown.