MRCOOL MGWH199IXNN
MRCOOL MGWH199IXNN is in the DOE listing as of Oct 19, 2026. MRCOOL MGWH199IXNN is in the ENERGY STAR list as of Oct 19, 2026.
- Gas tankless water heater
- 2 listed models
Its figures are also listed under Elios EROD199N0000.
Certified figures
- Flow at a 67°F rise
- 5.7gallons per minute
- UEF
- 0.95Uniform energy factor
Your fixtures at once
Change your hour and flowFlow 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 5.5 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.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| MHWH199NCLU | 0.95 | 5.7 | 99% | High |
| MHWH199NCNU | 0.95 | 5.7 | 99% | 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) | Recovery efficiency |
|---|---|---|---|
| MHWH199NCLU | 0.95 | 5.7 | 99% |
| MHWH199NCNU | 0.95 | 5.7 | 99% |
It heats 5.7 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. Of 487 gas tankless models, 60 have a higher flow than this one.
All 2 of its model numbers are ENERGY STAR certified. In tests, 95% of the energy it uses ends up as hot water (UEF 0.95). The daily hot water use in the test, called its draw pattern, was high. Of 399 gas tankless models with the same draw pattern, 49 have a higher UEF. For its type and draw pattern, the UEF runs from 0.81 to 0.98. Of the energy it spends heating water, 99% ends up in it (its recovery efficiency).
It is the basic model for MHWH199NCLU and MHWH199NCNU. Its test figures match those of 15 other basic models. Besides this brand, 4 brands list one or more of them. For the full group, see the Elios EROD199N0000 page.
It may qualify for 6 rebate programs in 7 states. Another 2 programs may accept it if it meets their other terms.
Also listed as
They carry every figure in the table above.
- Elios EROD199N0000
- Elios MGWH199IXNN
- Kepler JSG52-32PCH-NG
- Kepler JSG52-32PCH/199KNP
- Kepler MGWH199IXNN
- Kepler MGWH199IXNP
- Midea JSG52-32PCH-LP
- Midea JSG52-32PCH-NG
- Midea MGWH199IXNN
- Midea MGWH199IXNP
- Midea MGWH199IXPN
- Midea MGWH199IXPP
3 more basic models carry these figures.
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 MRCOOL basic model
- Every gas tankless water heater certified at 5.0 to 5.9 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.