Midea MGWH199OSNN

The registry lists this unit at UEF, the ratio of hot water delivered to energy used, of 0.82. It also lists a maximum flow rate in gallons per minute of 5, as the rated maximum. The annual figure of 206 therms was computed by this site, not by the registry. It combines the registry's UEF with the DOE test's daily hot-water draw for the high draw pattern. The energy data come from the DOE CCD, retrieved 2026-09-19. The figure applies only at the federal test's draw. Real household use can differ, and this page holds no measured data for a specific home.

Among the 397 models registered as a gas tankless unit at the high draw pattern, it ranks 229th lowest in energy use. That places it in the second-highest quarter of its class for energy use. Its 206 therms is 24 therms above the class median of 182 therms. A larger household, or one where showers and laundry overlap, matches the draw pattern this figure describes. A smaller household should not read 206 therms as its own use, because the test draw may not match theirs. The registry data on this page do not show what a lower-use household would consume.

Running cost is not written here. It depends on the state average residential gas price for the reader's ZIP. Multiplying 206 therms by that price gives a check by hand. The cost calculator on your own ZIP does this for the model, and how the annual cost is calculated explains the steps. To compare against other units at the class median of 182 therms, use the same-class replacement search by model number. The modeled installed-cost range appears in its own block with its source and date. It is not a quote, and this text does not restate it.