Midea MGWH199OSPN

The registry gives this model a UEF, the ratio of hot water delivered to energy used, of 0.82. The 206 therms figure is not a registry value. This site computed it from that UEF and the DOE test's daily hot-water draw for the high draw pattern. It is natural gas use at the federal test's draw, not a measurement of any one household. The DOE CCD data was retrieved 2026-09-19. Use in a real home changes with how much hot water that home draws. The methodology page explains how the annual cost is calculated.

The comparison covers 397 models registered as a gas tankless unit at the high draw pattern. This model ranks 229th lowest for energy use of 397. Its 206 therms is 24 therms above the class median of 182 therms. That puts it in the second-highest quarter of its class for energy use. The registry also lists a maximum flow rate in gallons per minute of 5. The data does not show how that flow rate changes the annual figure. The energy figure fits a check against a household with a high draw pattern. It does not describe a household with a smaller daily draw. Models ranked lower use less energy at the same draw pattern.

The running cost is not stated in the text, because it depends on the state average residential gas price for the reader's ZIP. The 206 therms figure applies at the high draw pattern, and the gas price then sets the cost. The cost calculator on your own ZIP applies that price to this model. The installed price range appears in its own block on this page, with its source and date. It is a modeled range, not a quote. To compare against another unit at the same draw pattern, you can find a same-class replacement by model number. Check its energy use against the class median of 182 therms.