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NFC-H Series

Condensing fire tube combi-boilers

Navien NFC-H condensing fire tube combi-boilers: the ultimate space heating and DHW comfort package

More features, more benefits, more extras and more value... all in one package

Now the innovator in high-efficiency condensing tankless water heaters and fire-tube boilers puts it all together in one high-volume combi-boiler for commerical use.

  • single-piece stainless steel fire tube heat exchanger used in commercial combi boilers

    Patented one-piece stainless steel fire tube heat exchanger

    Navien’s advanced patented integral stainless steel heat exchanger design reduces high stress point weld failures.

  • stainless steel flat plate heat exchanger used in commercial grade combi boilers

    High flow rates

    Separate stainless steel flat plate heat exchanger for hot water creates one of the highest flow rates for any combi‑boiler in the industry... Up to 5.4 GPM @ 67º temperature rise.

  • business owner using Wi-Fi control system for commercial combi-boiler

    NaviLink™ Wi-Fi control system

    The optional NaviLink™ Wi-Fi control system provides access to your tankless condensing combi-boiler from anywhere in the world

  • Nfc-feature-venting

    Multiple venting options

    Low exhaust gas temperatures allow use of PVC, CPVC, polypropylene (rigid and flexible) and stainless steel venting reducing installation time and costs. System can use 2" venting for up to 65', or up to 150' with 3" venting.

  • 10-1-ratio-nfb-2

    Turndown ratio of up to 15:1 for both heating and hot water

    The sophisticated gas flow control system provides a high turndown ratio, reducing energy waste and excessive boiler cycling and enhancing temperature control for DHW.

commercial building designer reviewing combination boiler piping diagram on tablet held over blueprints

Commercial Grade Combi Boiler with High-Volume Output

The NFC-H combi boiler can provide heating up to 199,000 BTU/h and hot water up to 210,000 BTU/h, making it an ideal system for commercial, light commercial and industrial applications.

Navien combi-boiler applications

  • Commercial hot water
    (dishwashers, showers, etc.)

  • Finned tube baseboards

  • Cast iron baseboards

  • Radiant floor heating

  • Fan coils

  • Radiators

  • Air handlers


Navien commercial combi-boilers can be fueled by either natural gas (NG) or propane (LP) and provide reliable, energy-efficient heating and hot water for a wide range of businesses including:

  • Office buildings
  • Restaurants & bars
  • Gyms & sports centers
  • Hotels/motels
  • Schools & universities
  • Multi-family housing properties
  • Municipal buildings
  • Hospitals & clinics
  • Retail stores
  • Industrial warehouses
  • Employee facilities within manufacturing plants
high-capacity fire tube combination boiler for commercial applications

Advantages of Navien NFC-H
high capacity fire tube

  • AFUE 95.0% Energy Star certified
  • Backed by one of the industry’s strongest warranties: 5 years on heat exchangers for commercial
  • Space-saving design
  • Can be cascaded with Navien NPE water heater for extraordinarily large demand
  • Easy to use control panel
  • Elegant, clean appearance
  • Ideal for replacements or new construction

Learn more about the NEW NFC-H Series

Even more features, benefits and extras:

  • Smart controls with LCD display, quick dial wheel and Setup Wizard
  • Patented stainless steel fire tube heat exchanger with non-metallic
    condensate base
  • 15:1 DHW and up to 15:1 heating TDR
  • Field convertible gas system (NG/LP)
    up to 10,100 ft.
  • Capable of cascading with up to 15 NPE
    tankless water heaters
  • Capable of common venting with up to 7 NPE tankless water heaters
  • Built-in powered connections for up to 3 zone pumps or 3 zone valves
  • 2” PVC, CPVC, PP and SS venting material approved up to 65'
  • 3” PVC, CPVC, PP and SS venting material approved up to 150'
  • Built-in hot water adjustment and mixing control valves for added comfort

Lower energy bills, easier on the planet

Navien condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing combi-boilers. The result is a reduction in energy consumption, lower CO2 emissions and low exhaust temperatures allowing the use of less expensive venting materials such as Schedule 40 PVC.

high-efficiency commercial combi boiler

The ultimate in energy efficiency


Navien condensing combi-boilers are Energy Star certified, providing an AFUE of 95.0%. These extremely efficient and eco-friendly units provide extra energy savings over a traditional floor standing boiler and storage tank.

Click here to learn more about NFC-H
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