NFC Series

Condensing fire tube combi-boilers

Navien NFC 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 amazing combi-boiler.

Navien NFC condensing fire tube combi-boilers

  • AFUE 95.0% Energy Star Most Efficient for 2019.
  • Energy Star certified.
  • Backed by one of the industry’s strongest warranty
    — 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

NFC applications

  • Domestic hot water (showers and faucets)
  • Finned tube baseboards
  • Cast iron baseboards
  • Radiant floor heating
  • Fan coils
  • Radiators
  • Air handlers

Innovations make Navien NFC condensing combi-boilers the best choice
for businesses

  • Patented one-piece stainless steel fire tube heat exchanger

    Navien’s advanced patented one-piece stainless steel heat exchanger design reduces high stress point weld failures and resists corrosion better than copper for longer life.

  • High flow rates

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

  • Optional NaviLink™ Wi-Fi control system

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

  • 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 60', or up to
    150' with 3" venting.

  • Low noise levels

    Installations in or near meeting rooms, offices or any areas
    of the building are possible
    with the quiet running Navien combi-boilers.

  • Turndown ratio of 11:1 for heating and 11:1 for DHW

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

Protect the environment as
you add value


Navien fire tube condensing stainless steel heat exchangers recover additional heat from the flue gases contributing to reduced energy consumption and lower CO2 emissions. Resulting lower exhaust temperatures allow for the use of inexpensive venting materials such as PVC Schedule 40 in almost all applications.

The ultimate in energy efficiency


Navien condensing combi-boiler technology provides 95.0% AFUE, recognized by Energy Star as Most Efficient. These extremely efficient and eco-friendly units provide extra energy savings over a traditional floor standing boiler and storage tank.