The Noritz NCC199-CDV-NG (GQ-C3261WZ-FF US NG) Commercial Condensing Tankless Water Heater delivers high-efficiency, on-demand hot water for demanding commercial and large residential applications. Designed with advanced condensing technology, the NCC199-CDV-NG captures additional heat from combustion gases to maximize efficiency while providing continuous hot water whenever it is needed. With up to 11.1 gallons per minute of hot water production and a maximum input of 199,900 BTU, this ENERGY STAR® certified unit is ideal for restaurants, offices, salons, apartment buildings, schools, light commercial facilities, and high-demand residential installations.
Featuring dual 316L stainless steel heat exchangers, commercial-grade durability, and flexible installation options, the NCC199-CDV-NG supports indoor direct vent, single vent, or optional outdoor installation while offering common vent capability for up to twelve units. Its compact wall-mounted design, built-in display, Bluetooth® connectivity, optional Wi-Fi capability, and field-convertible fuel configuration make it an excellent solution for new construction, replacement projects, and commercial recirculation systems.
The NCC199-CDV-NG is engineered for demanding commercial installations that require continuous hot water throughout the day. Typical applications include restaurants, hotels, apartment buildings, schools, office buildings, fitness centers, healthcare facilities, laundromats, salons, and other businesses with high hot water demand.
Its compact wall-mounted design allows multiple units to be cascaded together, providing scalable hot water capacity while offering redundancy that helps minimize downtime during maintenance.
Commercial tankless water heaters are sized using flow rate (GPM), temperature rise, and the building's peak simultaneous hot water demand. Unlike storage tank systems, tankless units produce hot water continuously rather than storing a fixed volume.
When selecting a commercial tankless water heater, always calculate the maximum number of fixtures expected to operate simultaneously and use the coldest incoming groundwater temperature for your location. Larger commercial facilities often benefit from multiple units connected in a cascade system to increase capacity and provide system redundancy.
An isolation valve kit is strongly recommended for commercial tankless water heater installations. Isolation valves allow the water heater to be flushed, descaled, and serviced without shutting off water to the entire building. Regular maintenance helps remove mineral buildup from the heat exchangers, maintain efficiency, and extend the service life of the equipment.
The NCC199-CDV-NG includes Noritz's commercial limited warranty featuring a 10-year heat exchanger warranty for both recirculation and non-recirculation commercial applications, a 5-year parts warranty, and a 1-year reasonable labor warranty. Always verify gas supply, venting configuration, condensate drainage, electrical requirements, water quality, required accessories, and all applicable plumbing, mechanical, and fuel gas codes prior to installation.
The Noritz NCC199-CDV-NG is a commercial-grade condensing tankless water heater engineered for high-demand applications requiring reliable continuous hot water delivery. Operating on natural gas, this system delivers up to 11.1 gallons per minute with a maximum input of 199,900 BTU, making it suitable for restaurants, salons, multifamily properties, offices, and other light commercial environments with significant daily hot water usage.
Designed for commercial performance and installation flexibility, the NCC199-CDV-NG utilizes a compact wall-mounted configuration that helps conserve mechanical room space while supporting scalable commercial water heating setups. Its condensing design improves thermal efficiency while maintaining stable hot water output during periods of varying demand.
Built with advanced burner modulation and durable stainless steel heat exchangers, the system continuously adjusts heating capacity based on incoming water flow requirements. With a Uniform Energy Factor (UEF) of up to 0.98, the NCC199-CDV-NG supports energy-conscious commercial operation while providing on-demand hot water without the standby losses associated with conventional storage tank systems.
