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Today's Hours 8am - 11pm estThe Noritz NC199-OD-LP 9.8 GPM 199,900 BTU Commercial Propane Outdoor Tankless Water Heater is engineered to deliver dependable, continuous hot water for demanding commercial applications including restaurants, office buildings, salons, multi-family properties, and other light commercial facilities. Unlike traditional storage tank water heaters that can run out of hot water during periods of heavy demand, the NC199-OD-LP heats water only when needed, providing an endless supply of hot water while reducing standby energy loss.
Designed exclusively for outdoor installation, the NC199-OD-LP eliminates the need for indoor venting while delivering up to 199,900 BTU of propane heating power and a maximum flow rate of 9.8 gallons per minute. Its compact wall-mounted cabinet helps save valuable indoor space while commercial-grade construction, advanced temperature controls, and multi-unit capability make it an ideal solution for new construction and replacement commercial water heating applications.
An isolation valve kit is recommended for tankless water heater installations. These valves allow the unit to be isolated from the plumbing system for flushing, descaling, maintenance, and servicing without shutting off water to the rest of the building.
Routine flushing helps remove mineral buildup inside the heat exchanger, maintaining efficiency and extending equipment life, especially in areas with hard water.
Only one isolation valve kit is required for the NC199-OD-LP depending on your installation layout.
Both kits include 3/4" threaded isolation valves and a lead-free pressure relief valve.
Tankless water heaters are sized using flow rate (GPM) and temperature rise rather than tank capacity. Always size using your area's winter groundwater temperature since colder incoming water requires more heating.
For example, if your desired hot water temperature is 120°F and incoming groundwater is 50°F, the required temperature rise is:
120°F − 50°F = 70°F Temperature Rise
Consult the manufacturer's flow rate chart to determine expected hot water output at your required temperature rise.
This product includes Noritz's commercial limited warranty featuring a 5-year heat exchanger warranty, 5-year parts warranty, and 1-year labor warranty for qualifying commercial installations. Always verify propane fuel supply, installation location, gas pressure, water quality, local plumbing codes, and required accessories before installation.
The Noritz NC199-OD-LP is a commercial-grade outdoor tankless water heater engineered to deliver dependable, high-volume hot water for businesses and commercial facilities where propane is the preferred fuel source. Producing up to 9.8 gallons per minute and featuring a maximum input of 199,900 BTU, this unit is designed to provide continuous hot water for demanding applications without the limitations of traditional storage tanks.
Purpose-built for outdoor installation, the NC199-OD-LP eliminates the need for indoor venting while helping preserve valuable mechanical room space. Its compact wall-mounted design allows for flexible exterior placement, making it an excellent solution for restaurants, offices, retail establishments, multi-unit properties, and other commercial environments where installation flexibility is essential.
The tankless design heats water only when demand is present, providing a continuous supply of hot water while reducing standby heat losses associated with conventional tank systems. With a Uniform Energy Factor (UEF) of 0.82, the NC199-OD-LP combines dependable commercial performance, efficient propane operation, and long-term reliability for businesses that depend on consistent hot water every day.



