Midea MGWH199IXPN

The 178 therms figure is computed by this site. The registry does not publish it. It combines the model's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw for the high draw pattern. The registry lists a UEF of 0.95 for the MGWH199IXPN, taken from the DOE CCD and retrieved 2026-09-19. Among the 397 models in its class, it ranks 45th lowest in energy use. That puts it in the lowest quarter of its class. The gap to the class median is 4 therms a year, measured at the federal test's draw only. How much hot water your household actually uses is not available here, so your gas use can differ. The page on how the annual energy and cost figures are calculated lists each input.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The 178 therms figure describes that usage profile and no other. The registry also lists a maximum flow rate in gallons per minute of 5.7 for this unit. That is the highest flow the registry records for the MGWH199IXPN. For a home that uses much less hot water than the high draw pattern, this page has no energy figure. A lower-draw figure for this model is not available. The class also covers only gas tankless units at the high draw pattern. To compare other fuels or tank types, use the selector by fuel, space and size. To match a unit in the same class, use the same-class replacement search by model number.

This text gives no running cost for the MGWH199IXPN. The cost depends on your state's average residential natural gas price. The page therefore computes it from your ZIP, in the block beside this text. That cost applies to 178 therms a year at the high draw pattern. The 4 therms gap to the class median is an energy gap, and its cost also follows your own rate. The cost calculator on your own ZIP shows the same calculation for other models in the class. The installed-price range appears in its own block, with its source and date. It is a modeled installed-cost range, not a quote.