Navien-app-icon-ci

Download the new Navien mobile app!

Apple iOSGoogle Android

NHW-199AI

premium Non-Condensing Tankless Water Heater

  • Built-in recirculation pump & buffer tank
  • NaviTech stainless steel heat exchanger and burner
  • Interior unit for indoor installations
  • NaviVent 3" x 5" concentric venting
  • Available in NG or LP
  • Cascading capable
  • Low NOx emissions (20ppm)
Navien NHW-199AI non-condensing indoor tankless water heater
NHW-199AI certifications
  • Built-in recirculation pump & buffer tank
  • NaviTech stainless steel heat exchanger and burner
  • Interior unit for indoor installations
  • NaviVent 3" x 5" concentric venting
  • Available in NG or LP
  • Cascading capable
  • Low NOx emissions (20ppm)
Credits & Rebates Finder
Find Sales Rep

NHW-199AI premium features and benefits

Nhw-ai open insidestory3
Pump2

ComfortFlow® built-in recirculation system
The patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater.

Control-panel-ai

NHW-A Built-in control panel
Allows you to adjust water temperature, operation status and troubleshooting.

Aps

Built-in Air Pressure Sensor (APS)
Monitors vent system for blockage, automatically compensates for range of vent lengths, helps maintain proper air/gas ratio during operation, and ensures consistent hot water output during changing conditions.

Features circle

Includes advanced safety features Such as the Vent Installation Detector (VID)

Nhw-ai open insidestory@3x
Wav(h)

Built-in Water Adjustment Valve (WAV) & Mixing Valve
Control flow to maintain setpoint and stabilize water temperature during flow changes.

Exchanger (e)

Exclusive NaviTech™ stainless steel heat exchanger
The NWH700 series non-condensing tankless water heaters feature a stainless steel heat exchanger to deliver unmatched durability and performance.

Burner (f)

Patented NaviTech™ stainless steel gas burner
Designed and manufactured by Navien to burn gas at higher efficiency than other system on the market.

Board(g)

Recirculation control built into circuit board
Ensures proper system setup, and reduces the need for additional components, saving installation time and cost.

NHW-199AI QuickFacts

NHW‑AI Videos

Compare NHW‑AI models

NHW-160AI
Max DHW Input: 160,000 BTU/h
Indoor wall-hung
Residential/Commercial
Navien NHW-160AI non-condensing indoor tankless water heater
View model
NHW-160AI
NHW-180AI
Max DHW Input: 180,000 BTU/h
Indoor wall-hung
Residential/Commercial
Navien NHW-180AI non-condensing indoor tankless water heater
View model
NHW-180AI
NHW-199AI
Max DHW Input: 199,900 BTU/h
Indoor wall-hung
Residential/Commercial
Navien NHW-199AI non-condensing indoor tankless water heater
View model
NHW-199AI
Contact Us