Midea MGWH150IXNP

The registry lists a 0.95 UEF, the ratio of hot water delivered to energy used, for the Midea MGWH150IXNP. The figure of 178 therms was computed by this site, not the registry, from that UEF and the daily hot-water draw in the DOE test for the high draw pattern. The source is DOE CCD, retrieved 2026-09-19. Because it uses the test's draw, it describes a standardized day, not measured use in any particular home. The unit sits 4 therms below the class median of 182 therms, and its rank of 45th lowest of 397 places it in the lowest quarter of its class for energy use. The comparison covers only models registered as a gas tankless unit at the high draw pattern.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. The figure of 178 therms is therefore most relevant to a home that matches that description. It is less relevant to a household with a different draw pattern, because the test's daily draw would not match its use. The registry lists a maximum flow rate in gallons per minute of 4.2. The temperature rise behind that flow rate is not available in this data, so it cannot be judged here for a given climate. To compare other units in the same class, use the water heater selector by fuel, space and size or find a same-class replacement by model number.

Running cost depends on your state's average residential gas price, so it is not stated in this text. It is that price applied to 178 therms, and the 4 therms gap to the class median of 182 therms changes the yearly cost by the same gap multiplied by the same price. The cost calculator on your own ZIP does this calculation for you, and how the annual cost is calculated sets out the method. The modeled installed-cost range appears in its own block on this page with its source and date. It is a range, not a quote, and it is not repeated here. Actual gas use in a home may differ from 178 therms when the household's daily hot-water use differs from the test draw.