Consistent hot water becomes especially important in homes where several bathrooms and appliances may need it at the same time. The MRCOOL MHWH199NCNU is a natural gas tankless water heater designed to provide hot water to up to four bathrooms and multiple home appliances simultaneously. Its compact, space-saving design also provides a practical configuration for homes where equipment footprint matters.
The heater combines a 92% Uniform Energy Factor (UEF) rating with specified flow rates that vary according to temperature rise. It provides 10.7 GPM at a 35°F rise, 8.3 GPM at a 45°F rise, and 6.8 GPM at a 55°F rise. Several features support controlled and consistent operation. The electronic thermostatic PCB provides intelligent temperature control while automatically controlling gas flow.
The large touchscreen display also provides information about the heater's operation for the user and plumber. The MRCOOL natural gas tankless water heater is intended for professional installation and is not compatible with mobile homes. It includes freeze protection, with a listed operating temperature range of 95°F to 140°F. The stainless steel, corrosion-resistant construction is specified to provide four times the corrosion resistance of copper, while the unit's compact design supports space-conscious installations.
Product Feedback: “The high-volume hot water delivery is a noticeable advantage when multiple bathrooms and appliances need hot water.”
The electronic thermostatic PCB provides temperature control while automatically controlling gas flow, while the large touchscreen display provides information about the heater's operation for the user and plumber.
For homes with higher hot water demands, the MRCOOL MHWH199NCNU provides a tankless water heating solution with specified flow rates, a 92% UEF rating, corrosion-resistant stainless steel construction, and a compact configuration.
Product Highlights
| Feature |
Benefit |
| High Volume Hot Water Delivery |
Supports hot water delivery to up to four bathrooms and multiple home appliances simultaneous |
| Self Adapting Temperature Regulation |
Helps provide accurate temperature regulation for a more comfortable hot water experience. |
| Intelligent Temperature & Gas Control |
The electronic thermostatic PCB automatically controls temperature and gas flow for controlled operation. |
| Variable Speed Fan Operation |
The EDM BLDC variable-speed fan supports stable combustion and smooth airflow transitions. |
| Corrosion Resistant Stainless Steel Construction |
Provides four times the corrosion resistance of copper while supporting the unit's long-lasting construction. |
| Compact, Space-Saving Design |
Provides a tankless configuration suited to applications where conserving equipment space is important. |
| Freeze Protection |
Helps protect the system with dedicated freeze protection functionality. |
| Premixed Burner Technology |
Supports reduced NOx emissions, lower flame temperature, and reduced port-loading. |
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