United Plumbing & Fire Supplies
Navien NHW-199SE Non-Condensing Tankless Water Heater (Outdoor)
Navien NHW-199SE Non-Condensing Tankless Water Heater (Outdoor)
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Product Description:
The Navien NHW‑199SE is the most powerful model in Navien’s SE outdoor tankless lineup, delivering a robust 199,900 BTU of heating capacity. Designed for high-demand residential applications, this outdoor-only, non-condensing unit features a stainless steel heat exchanger and burner, low NOₓ emissions, and a compact wall-mounted design for space-saving convenience.
With a UEF of 0.81 and corrosion-resistant internals, the NHW‑199SE is built for maximum durability and performance in exterior installations—without the need for indoor venting or condensate drainage.
Key Specifications & Benefits:
| Feature | Specification / Benefit |
|---|---|
| BTU Input | 199,900 BTU — highest in the NHW-SE line |
| Installation | Outdoor-only — vent-free setup |
| Heat Exchanger & Burner | Stainless steel for long-lasting durability |
| Efficiency | 0.81 Uniform Energy Factor |
| Flow Rate | ~7.7 GPM at 45°F temperature rise |
| Emissions | Ultra-low NOₓ (20 ppm) |
| Fuel Type | Compatible with Natural Gas or Propane |
| Power Supply | 120V AC |
| Dimensions | 17.3″ W × 26.5″ H × 10.3″ D |
| Warranty | 15-year heat exchanger, 5-year parts (residential use) |
Why Choose NHW-199SE?
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Maximum Outdoor Output: Designed to meet the demands of large households or luxury residences.
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Vent-Free Convenience: No interior routing or condensate drainage required.
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Durable & Efficient: Stainless steel components deliver reliability and corrosion resistance.
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Eco-Friendly: Meets strict low NOₓ emission standards.
Ideal Applications:
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Large residential homes with multiple bathrooms
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Outdoor-only installations in warm to temperate climates
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High-demand retrofit or new construction projects
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