MRCOOL MHWH199NCNU
MRCOOL MHWH199NCNU is in the DOE listing as of Oct 19, 2026. MRCOOL MHWH199NCNU is in the ENERGY STAR list as of Oct 19, 2026.
- Gas tankless water heater
- 1 listed model
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
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 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 |
|---|---|---|---|---|
| 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 |
|---|---|---|---|
| MHWH199NCNU | 0.95 | 5.7 | 99% |
It warms 5.7 gallons per minute of water from 58°F to 125°F in the test. The gas tankless type has a median flow of 4.8 gallons per minute. Its flow at a 67°F rise trails 60 of the 487 gas tankless models.
The single model number sold under it is ENERGY STAR certified. In the test, 5% of its energy does not reach the hot water (UEF 0.95). Its test simulated a day of high hot water use (its draw pattern). Among 399 gas tankless models on its draw pattern, 49 have a higher UEF. A UEF of 0.93 is the median for its type and draw pattern. Of the energy it spends heating water, 99% ends up in it (its recovery efficiency).
Its test figures match those of 15 other basic models. Between them, those basic models carry 4 other brand names. For the full group, see the Elios EROD199N0000 page.
It may qualify for 6 rebate programs. 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.
- 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.