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NHW700-199AE – Non-Condensing Tankless Water Heater – Outdoor, 199,000 BTU
NHW700-199AE – Non-Condensing Tankless Water Heater – Outdoor, 199,000 BTU
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Navien NHW700-199AEOutdoor Non-Condensing Tankless · 199,000 BTU
A high-capacity, non-condensing tankless water heater built for outdoor residential applications, designed to operate efficiently in a variety of climates with a compact footprint.
Comes with a built-in recirculation pump and buffer tank, helping to reduce hot water wait times and eliminate cold water bursts during demand cycles. It includes a built-in control panel for temperature adjustment and diagnostics, and is factory-configured for natural gas with an optional field conversion kit for propane.
Technical specification
| Type | Non-condensing tankless, outdoor installation |
|---|---|
| Input | 199,900 BTU/h |
| UEF rating | 0.81 |
| Flow rate | 9.5 GPM at 35°F rise, 7.4 GPM at 45°F rise |
| Heat exchanger | Patented NaviTech™ stainless steel |
| Burner | Stainless steel Low NOx (20 ppm) |
| Recirculation | Built-in ComfortFlow pump and buffer tank |
| Ignition | Electronic ignition system |
| Controls | Built-in panel for temperature setting and diagnostics |
| Fuel | Factory set for natural gas, field convertible to propane |
| Venting | NaviVent™ concentric 3″ x 5″, no additional venting accessories required |
| Safety devices | Flame rod, air pressure sensor, vent installation detector, water temp high limit switch, power surge fuse |
Applications
Outdoor Residential
Residential outdoor water heating.
High Output, Low Footprint
Homes needing high hot water output with minimal indoor space use.
Reduced Wait Time
Systems requiring reduced hot water wait time.
NG or LP Fuel
Installations in areas with natural gas or propane fuel availability.
Low NOx Compliance
Regions requiring Low NOx emissions compliance.
Key features
- Exclusive NaviTech™ stainless steel heat exchanger for unmatched durability and performance
- ComfortFlow built-in recirculation system — the first to combine a buffer tank, recirculation pump and fine-tuned controls in a tankless water heater
- Built-in control panel allows adjustment of water temperature, operation status and troubleshooting
- Built-in Air Pressure Sensor (APS) monitors the vent system for blockage, compensates for a range of vent lengths, and maintains proper air/gas ratio
- Patented NaviTech stainless steel gas burner designed to burn gas at higher efficiency than other systems on the market
- Recirculation control built into the circuit board, reducing the need for additional components and saving installation time and cost
- Built-in Water Adjustment Valve (WAV) and Mixing Valve control flow to maintain setpoint and stabilize water temperature during flow changes
Navien NHW700-199AE outdoor tankless water heater. Follow the installation manual, venting requirements, local gas and plumbing codes, and manufacturer instructions.
