Elios MGWH150IXNN
Elios MGWH150IXNN is in the DOE listing as of Oct 19, 2026. Elios MGWH150IXNN is in the ENERGY STAR list as of Oct 19, 2026.
- Gas tankless water heater
- 1 listed model
Its figures are also listed under A. O. Smith ATM-140M-N 1**.
Certified figures
- Flow at a 67°F rise
- 4.1gallons per minute
- UEF
- 0.95Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
Colder incoming water needs a bigger rise, so the heater gives 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
Elios MGWH150IXNN was in the DOE listing by Oct 1, 2026.
Elios MGWH150IXNN has a recorded ENERGY STAR market-availability date of Jan 28, 2026. It first appeared in the ENERGY STAR list between October 2025 and February 2026.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| EROD150P0000 | 0.95 | 4.1 | 97% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
ENERGY STAR certified models
| Model number | UEF | Flow at a 67°F rise (gal/min) |
|---|---|---|
| EROD150P0000 | 0.95 | 4.4 |
It heats 4.1 gallons per minute of water by 67°F in the test. The gas tankless type has a median flow of 4.8 gallons per minute. Of 487 gas tankless models, 368 have a higher flow than this one.
The single model number sold under it is ENERGY STAR certified. In tests, 95% of the energy went to hot water, so its UEF is 0.95. Its test simulated a day of high hot water use (its draw pattern). Its UEF is lower than that of 49 of the 399 gas tankless models with its draw pattern. For its type and draw pattern, the median UEF is 0.93. Of the energy it spends heating water, 97% ends up in it (its recovery efficiency).
All of its test figures are shared by 8 other basic models. In all, 7 other brands list one or more of them. For the full group, see the A. O. Smith ATM-140M-N 1**.
It may qualify for 6 rebate programs in 7 states. It may qualify for 2 more if it meets terms its figures do not show.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program 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.
- Every Elios basic model
- Every gas tankless water heater certified at 4.0 to 4.9 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Advertised figures. We have none on file for this model.