MRCOOL® 199,000 BTU Liquid Propane Tankless Water Heater – Indoor High-Efficiency On-Demand Hot Water System, Model- MHWH199NCLU

Product Description 

The MRCOOL® 199,000 BTU Liquid Propane Tankless Water Heater delivers powerful, continuous hot water on demand, making it an ideal solution for modern homes that demand efficiency, reliability, and performance. Designed for indoor installation, this high-efficiency tankless system can support multiple appliances and up to four bathrooms simultaneously, eliminating the frustration of running out of hot water.

 

Unlike traditional tank-style heaters, this MRCOOL® tankless water heater heats water only when needed, reducing standby energy loss while saving valuable space. Its stainless steel heat exchanger, offering up to four times the corrosion resistance of copper, ensures long service life, cleaner water flow, and consistent performance year after year.

  

KEY FEATURES & PERFORMANCE HIGHLIGHTS

• 199,000 BTU heating capacity

• Liquid propane (LP) fuel type

• Indoor installation design

• Supports up to 4 bathrooms simultaneously

• 92% Uniform Energy Factor (UEF)

• Maximum flow rate up to 8.45 GPM

• Stainless steel heat exchanger

• Eco-friendly premixed burner with low NOx emissions

• Electronic thermostatic PCB for precise temperature control

• Self-adapting temperature regulation

• Anti-freeze protection keeps water lines above 40°F

• Large touchscreen display for monitoring & diagnostics

• CSA listed & certified

 
HOT WATER PERFORMANCE 

Temperature Rise	Flow Rate
35°F Rise	11.12 GPM
45°F Rise	8.45 GPM
55°F Rise	6.8 GPM
65°F Rise	5.8 GPM

 

Perfect for simultaneous showers, laundry, dishwashers, and sinks.

 

ELECTRICAL & GAS REQUIREMENTS

• Fuel Type: Liquid Propane (LP)
• Voltage: 120V
• Frequency: 60 Hz
• Ignition: Electric
• Gas Inlet: ¾” NPT
• Water Connections: ¾” NPT
• Operating Pressure: 7–140 PSI
• Venting Options: 2”, 3”, or concentric

  

⚠️ Professional installation required

  

DIMENSIONS & WEIGHT 

Unit Dimensions

• Width: 17.33 in
• Height: 26.78 in
• Depth: 11.03 in

 

Weight

• Net Weight: 68.34 lbs
• Gross Weight: 74 lbs

 

WHAT’S INCLUDED

✔ MRCOOL® 199,000 BTU Liquid Propane Tankless Water Heater

✔ Integrated anti-freeze protection

✔ Touchscreen display

✔ Installation & operation manuals

 

WARRANTY COVERAGE

• 15-Year Heat Exchanger Warranty

• 5-Year Parts Warranty

• 5-Year Labor Warranty

Industry-leading protection for long-term peace of mind.

FREQUENTLY ASKED QUESTIONS (FAQ)

How many bathrooms can this support?

Up to four bathrooms at the same time, depending on flow demand.

 

Is this better than a tank water heater?

Yes. Tankless systems provide endless hot water, higher efficiency, and longer lifespan.

 

Is Wi-Fi included?

No. This model focuses on reliability and performance with onboard controls.

 

Is it mobile home compatible?

No. This unit is not approved for mobile home installation.

 

 

WHY BUY FROM MRCOOL DIRECT?

When you buy from MRCOOL Direct, you get:

✅ Authorized MRCOOL® dealer – warranty protected

✅ Factory-fresh equipment (no refurbished units)

✅ Fast U.S. shipping

✅ Real product support from HVAC specialists

✅ Financing options available

 

📞 Call us anytime: 615-553-8118

Family-owned • USA’s #1 MRCOOL® Authentication Dealer