Navien NHW700-199AI-NG Indoor Non-Condensing Tankless Water Heater, 199,900 BTU, Natural Gas, Built-In Pump

The Navien NHW700-199AI-NG is a non-condensing tankless water heater for indoor installation, running on natural gas with up to 199,900 BTU/h of input. Unlike most non-condensing units it carries a built-in recirculation pump and buffer tank, so hot water reaches the tap faster and without the cold burst between draws. It vents through Navien's 3" x 5" NaviVent concentric system.

• 199,900BTU/h input
• Built-inpump & buffer tank
• 20 ppmlow NOx
• Indoorinstallation

Why it earns its place on the wall

• NaviTech stainless steel heat exchanger and burner.
• Built-in recirculation pump and buffer tank for faster, steadier hot water.
• Low NOx (20 ppm) burner for areas with strict emission rules.
• NaviVent 3″ x 5″ concentric venting for a clean single-penetration install.
• Cascading capable for larger hot water demands.

Specifications

Good to know

• Gas appliances must be installed by a licensed professional following the manufacturer’s installation manual and local codes. Manufacturer warranty terms depend on professional installation and registration.
• Specifications are from the manufacturer. Check the current spec sheet and sizing guide before ordering.
• Large units ship by ground freight. You will receive tracking when your order leaves.
• Questions on sizing or venting? Call +1 901-563-1990 or email support@mouchllc.com before you buy.