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Navien NHW-199AE Non‑Condensing Tankless Water Heater (Outdoor)
Navien NHW-199AE Non‑Condensing Tankless Water Heater (Outdoor)
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Navien NHW-199AE Non‑Condensing Tankless Water Heater (Outdoor)
Get it between - and -.
Product Description:
The Navien NHW‑199AE is Navien’s highest-capacity outdoor tankless water heater, engineered for powerful performance in exterior installations. With a full 199,900 BTU input and integrated ComfortFlow® technology, this model includes a built-in recirculation pump and buffer tank for faster hot water and stable temperatures — even during peak demand.
Designed for durability and convenience, the NHW-199AE uses a stainless steel heat exchanger and burner, and installs cleanly without the need for indoor venting. It’s ideal for large homes in warmer climates or properties without interior venting access.
Key Specifications & Benefits:
| Feature | Specification / Benefit |
|---|---|
| BTU Input | 199,900 BTU — Navien’s most powerful NHW-A model |
| ComfortFlow® | Integrated recirc pump + buffer tank for immediate hot water |
| Installation | Outdoor-only — vent-free design for simplified setup |
| Heat Exchanger & Burner | Corrosion-resistant stainless steel |
| Efficiency | 0.81 Uniform Energy Factor (UEF) |
| Flow Rate | ~7.7 GPM at 45°F temp rise |
| Fuel | Compatible with natural gas |
| Power Supply | 120V AC, standard residential outlet |
| Emissions | Ultra-low NOₓ (<20 ppm) |
| Warranty | 15 years on heat exchanger, 5 years parts (residential) |
Why Choose NHW-199AE?
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Maximum Outdoor Output: Handles high-demand households with ease.
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ComfortFlow® System: Reduces hot water lag and prevents cold bursts.
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Zero Venting Required: Perfect for areas where indoor installation isn’t possible.
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Stainless Construction: Resists corrosion, even in exposed environments.
Ideal Applications:
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Large single-family homes with outdoor space
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Exterior retrofits where venting is not feasible
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Warm or temperate climates needing on-demand hot water
Testimonials
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★★★★★
Absolutely transformed my backyard! The quality is fantastic, and everything feels sturdy and well-made. I’ve already had neighbours asking where I got it from!"
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★★★★★
"This is hands-down the best purchase I’ve made for my garden. Easy to assemble, looks beautiful, and has held up perfectly through rain and sun."
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★★★★★
My garden has never looked better! The design is stunning, and the materials are clearly built to last. Worth every penny."
