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Midea MGWH150IXPN

Midea MGWH150IXPN is in the DOE listing as of Oct 19, 2026. Midea MGWH150IXPN is in the ENERGY STAR list as of Oct 19, 2026. Midea MGWH150IXPN changed its certified flow at a 67°F temperature rise (gallons per minute) for model MGWH150IXPN from 4 to 4.4 in the ENERGY STAR list between February 2026 and August 2026.

  • Gas tankless water heater
  • 1 listed model

Its figures are also listed under A. O. Smith ATM-140M-N 1**.

Flow at a 67°F rise
4.1gallons per minute
UEF
0.95Uniform energy factor
See it among every gas tankless model

Flow where you live

A bigger rise from colder incoming water leaves the heater with less flow.

Cold water
Cold water must be at least 10°F colder than the hot water setting.
Flow estimate
The estimate uses the lowest certified flow among the listed models. It is about 3.9 gal/min at a 70°F rise.

Flow limits

  • The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
  • Cold water from a well or long pipe run can differ from the temperature you enter.
  • Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.

Product history

Midea MGWH150IXPN was in the DOE listing by Oct 1, 2026.

Midea MGWH150IXPN changed its certified flow at a 67°F temperature rise (gallons per minute) for model MGWH150IXPN from 4 to 4.4 in the ENERGY STAR list between February 2026 and August 2026.

Midea MGWH150IXPN has a recorded ENERGY STAR market-availability date of Sep 10, 2025. It first appeared in the ENERGY STAR list between October 2025 and February 2026.

Certified figures by listed model

Model numberUEFFlow at a 67°F rise (gal/min)Recovery efficiencyDraw pattern
MGWH150IXPN0.954.197%High

UEF is the uniform energy factor. A dash means the model has no such figure.

ENERGY STAR certified models

Model numberUEFFlow at a 67°F rise (gal/min)
MGWH150IXPN0.954.4

It heats 4.1 gallons per minute of water by 67°F in the test. The median gas tankless model heats 4.8 gallons per minute by 67°F. Among 487 gas tankless models, 368 give more flow at a 67°F rise.

Its single model number, MGWH150IXPN, is ENERGY STAR certified. In tests, 95% of the energy went to hot water, so its UEF is 0.95. Its test ran at the high level of daily hot water use. Of 399 gas tankless models with the same draw pattern, 49 have a higher UEF and 217 a lower one. On its draw pattern, the median gas tankless UEF is 0.93. Of the energy it spends heating water, 97% ends up in it (its recovery efficiency).

There are 8 more basic models with the same test figures. In all, 7 other brands list one or more of them. You can find the whole group on the page for the A. O. Smith ATM-140M-N 1**.

It may qualify for 6 rebate programs. Another 2 programs may accept it if it meets their other terms.

Also listed as

They carry every figure in the table above.

Rebates

ProgramStateStatusProgram page
SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate CA May qualify Its own page
Colorado Springs Utilities Water heater rebate (gas storage, gas tankless) CO May qualify Its own page
Nicor Gas Energy Efficiency Rebates for Your Home (gas tankless) IL May qualify if it meets the other terms Its own page
DTE Energy Water Heaters (gas storage, gas tankless) MI May qualify Its own page
Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) MN May qualify Its own page
PSE&G Tankless Water Heaters NJ May qualify Its own page
Energy Trust of Oregon Residential Incentives OR, WA May qualify Its own page
Focus on Energy (gas tankless) WI May qualify if it meets the other terms Its own page

Programs change their terms. Check the program's own page before you buy.

Updated Oct 19, 2026 · Methodology

Not covered

  • Advertised figures. We have none on file for this model.