Midea MGWH150IXNN
0.95 UEF DOE CCD · 2026-09-19Grade B: where this UEF sits among the 397 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tankless unit, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking a Midea MGWH150IXNN for a larger household, this gas tankless unit uses 178 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 4 therms below the class median of 182 therms. It ranks 45th lowest of 397 models.
Energy use per year
178 therms a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the natural gas rate where you live.
That is below the median of 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 45 of 397, lowest energy first.
Solid line: this model (178 therms). Dashed line: the class median.
Min 173 therms Median 182 therms Max 209 therms
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 0.95 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tankless unit at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 4.2 gal/min DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2025-09-01 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- No ENERGY STAR · 2026-09-19
What it costs to install
$2,358–$3,405 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
- Vent type and size (ENERGY STAR)
- how a gas unit is vented, the vent's diameter and the height of its vent connector
What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
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Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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How to size a tankless water heater by GPM
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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All gas tankless water heaters
Gas-fired instantaneous units, sized by flow rate rather than tank gallons.
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Every Midea model on file
What this brand files, by heater type.
UEF 0.95 · Grade B Price it on your ZIP
The registry lists a UEF, the ratio of hot water delivered to energy used, of 0.95 for the Midea MGWH150IXNN. The annual figure of 178 therms of natural gas is not published by the registry. This site computed it from that UEF and the DOE test's daily hot-water draw for the high draw pattern, using DOE CCD data retrieved 2026-09-19. Among the 397 gas tankless models registered at the high draw pattern, this unit sits 4 therms below the class median of 182 therms. That places it 45th lowest, in the lowest quarter of its class for energy use. The comparison covers only models tested at the same draw pattern, so it says nothing about units tested at other patterns.
The high draw pattern describes a larger household, or one where showers and laundry overlap, so the 178 therms figure is most relevant to that kind of use. The unit's maximum flow rate in gallons per minute is 4.2. The registry data does not say how that flow holds up when several fixtures run at once or when incoming water is colder, so those cases are not available here. The figure suits a reader comparing this model with others at the same draw pattern. It is less useful for a household whose real hot-water use differs from the test's daily draw, because actual gas use will differ from 178 therms. To filter by fuel, space and size, use the water heater selector. To find a same-class replacement, search by model number.
The running cost is not stated in the text, because it depends on the state average residential gas price, which differs by reader. Multiplying 178 therms by the price per therm in your state gives the yearly gas cost at the high draw pattern. The cost calculator on your own ZIP does this for you, and the method behind the annual cost is documented on the methodology page. The installed price range appears in its own block with its source and date. It is a modeled installed-cost range, not a quote, and it is not restated here. The energy figure was retrieved on 2026-09-19 and reflects the test's daily draw, not measurements in any particular home.
DOE CCD · 2026-09-19