MRCOOL Liquid Propane Tankless Water Heater (MHWH199NCLU)

The MRCOOL® Liquid Propane Tankless Water Heater (MHWH199NCLU) delivers reliable, consistent hot water for longer periods than traditional water heaters. With a high flow rate and energy-efficient design, it can support multiple home appliances and up to four bathrooms simultaneously. This compact and space-saving tankless heater is also environmentally friendly, featuring advanced engineering with a corrosion-resistant stainless steel body that ensures clean water and an extended lifespan.

Key high-tech features include an electronic thermostatic PCB, a variable-speed EDM BLDC fan, and an eco-friendly premixed burner that improves efficiency while reducing NOx emissions. The smart self-adapting temperature regulation ensures precise and comfortable temperature control, and the anti-freeze protection keeps water flowing above 40°F, even in cold conditions. A large touch screen display provides easy-to-read information for both homeowners and service professionals during maintenance.

Installation must be completed by a professional, and the heater is backed by a 15-year warranty on the heat exchanger, with a 5-year parts and service warranty for additional peace of mind.

Key Features:

• Supports up to four bathrooms and multiple appliances
• Corrosion-resistant stainless steel design with extended durability
• Flow rates: 10.7 GPM @ 35°F rise; 8.3 GPM @ 45°F rise; 6.8 GPM @ 55°F rise
• Eco-friendly premixed burner for higher efficiency and reduced NOx emissions
• Smart self-adapting temperature regulation for accurate comfort
• Anti-freeze protection keeps water at safe temperatures
• Space-saving and compact design
• Professional installation required
• 15-year heat exchanger warranty, 5-year parts and service warranty
• Meets SCAQMD Standards, 92% Uniform Energy Factor (UEF)