MRCOOL Liquid Propane Tankless Water Heater | MHWH199NCLU


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With the MRCOOL Liquid Propane Tankless Water Heater, you can enjoy hot water much longer and consistently than usually experienced with traditional water heaters. This tankless water heater features a high volume and flow rate, high efficiency, and is capable of accommodating multiple home appliances and up to four bathrooms. This heater is space-saving and compact while being environmentally friendly as well. Advanced engineering was used to create the corrosion resistant stainless steel unit, which increases the lifespan of the heater. With four times the corrosion resistance of copper, this feature ensures you have clean water in and clean water out. The many high tech features that come with this heater include an electronic thermostatic PCB and an EDM BLDC variable-speed fan. Featuring an eco-friendly premixed burner, you can expect higher efficiency, a higher turn-down ratio, and safer anti-flashback burner. This also creates a reduction in NOx emissions. The smart self-adapting temperature regulation ensures a comfortable shower experience with accurate temperature regulation. The anti-freeze protection keeps the pipeline water higher than 40°F. The large touch screen display keeps you and your plumber informed about the heaters operation during maintenance. This unit must be installed by a professional. Feel protected by the 15-year warranty on the heat exchanger, as well as a 5-year parts warranty and a 5-year labor warranty.


  • Meets SCAQMD Standards
  • UNSPSC: 52141700
  • Not mobile home compatible
  • Min Temp: 95 F / Max Temp: 140 F
  • Wattage: 150 W (+114 W when anti-freeze module is on)
  • Maximum Gallons per Minute: 8.45g/min
  • Flow Rate @ 35°F Rise (gallons/min): 11.12
  • Flow Rate @ 45°F Rise (gallons/min): 8.45
  • Flow Rate @ 55°F Rise (gallons/min): 6.8
  • Flow Rate @ 65°F Rise (gallons/min): 5.8
  • 92% Uniform Energy Factor (UEF)
  • PSI: 7-140


    Dimensions 26.78"H x 17.33"W x 11.03"D
    Weight 68.34 lbs
    Condenser Weight Heat Exchanger Weight: 24.03 lbs
    Heating Capacity 199000 BTU
    Fuel Type propane
    Voltage 120V
    Cycle 60Hz
    Color White
    Number of Burners 1
    Min Ambient Heat Hot water outlet: NPT3/4in
    Drain Connection Size Cold water inlet: NPT3/4in
    Gas Connection Size Gas inlet: NPT3/4in
    Ignition Type Electric Ignition
    Vent Connector 2 in. or 3 in. or concentric
    Overload Protection Freeze Protection: Yes
    WiFi Compatibility no
    App Compatibility no
    CSA Listed yes
    CSA Certified yes
    Energy Star Certified No
    Base Warranty 5 year service
    Base Parts Warranty 5 year parts
    Base Heat Exchanger Warranty 15 year heat exchanger
    Proposition 65 Warning yes
    Gross Depth 13.74in
    Gross Height 33.22in
    Gross Width 20.27in
    Gross Weight 73.85 lbs


  • Brochure
  • Install Manual
  • Warranty Doc

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