Navien NFB-200H Fire Tube Condensing Boiler – 199,000 BTU High Efficiency Heat-Only Gas Boiler
Key features
- 15:1 turndown ratio for efficient performance across variable loads
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
- 2″ (5.1 cm) venting up to 65 ft (19.8 m), 3″ (7.6 cm) venting…
- Advanced controls with intuitive interface and Setup Wizard
Please note: this is the US version of this product, supplied with US gas fittings. A UK-compatible regulator and hose are needed to use it with UK propane or butane bottles, and we recommend having the connection checked by a Gas Safe registered engineer. Manufacturer warranty terms may differ for US-version products.
Upgrade to high-efficiency heating and endless hot water. The Navien NFB-200H Fire Tube Condensing Boiler uses condensing technology to cut fuel use while delivering reliable comfort for your home.
Navien NFB-200H – Condensing Heating Boiler – 199,000 BTU
The Navien NFB-200H is a high-efficiency condensing heating boiler designed for residential and light commercial applications. The boiler features a 15:1 turndown ratio for precise load matching and energy savings. Its patented stainless steel fire tube heat exchanger is paired with a non-metallic condensate base for durability and corrosion resistance. The NFB-200H includes advanced controls, supports common venting and cascading, and is approved for high-altitude installations.
Features:
- 15:1 turndown ratio for efficient performance across variable loads
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
- 2″ (5.1 cm) venting up to 65 ft (19.8 m), 3″ (7.6 cm) venting up to 150 ft (45.7 m)
- Advanced controls with intuitive interface and Setup Wizard
- Built-in powered connections for 3 zone valves or 3 zone pumps
- Common venting for up to 8 units and cascading for up to 16
- Approved for high altitudes up to 10,100 ft (NG and LP)
- Field convertible with included gas conversion kits
- NaviLink Wi-Fi compatible for remote control and monitoring (sold separately)
Applications:
- Residential hydronic heating systems
- Light commercial buildings
- Installations requiring scalable boiler banks
- High-efficiency replacements for aging systems
- Multi-zone systems with valves or pumps
- Indoor wall-hung boiler installations with flexible venting options
NFB-200H premium features and benefits
2″ (5.1 cm) venting up to 65′;
3” up to 150’ (including schedule 40 PVC).Vent Installation Detector (VID)for added safety.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‐Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Low gas pressure operation. Negative pressure regulating gas valveensures maximum performance all the way down to 3.5″ (8.9 cm) of water column on natural gas and 8″ (20 cm) of water column on propane gas.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Built-in control for a boiler pump, 3 zone pumps or 3 zone valves
1/2″ gas pipe capability up to 24′ (subject to local codes). Cuts installation time, no need to install new gas lines for retrofit applications.
PZNS642636
Free UK delivery
Every order ships free to any address in the United Kingdom. Most orders arrive within 2–10 working days. As soon as your order is dispatched you will get a tracking link by email, and you can follow it any time on our Track Order page.
30-day returns
If you are not happy with your order you can return it within 30 days. Please contact us first so we can help and send you the return details.
Safe, secure card payment
We accept Visa, Mastercard, American Express and Maestro debit and credit cards, plus Apple Pay and Google Pay. Payments are processed securely by Stripe over an encrypted connection, and we never see or store your full card details.
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