NFB Series

High efficiency Condensing Heating boiler

Totally reinventing fire tube technology from the ground up

  • Patented stainless steel heat exchanger —eliminates high stress point welds.
  • Advanced user interface and controls with intuitive text display, simplifies boiler setup.
  • Built-in hardware to connect a boiler system pump, 3 zone pumps or 3 zone valves.
  • Optional NaviLink Wi-Fi remote control.
  • Cascading and common venting capable.
  • 10:1 Turn Down Ratio.
  • AFUE 95.0% — Energy Star 2018 most efficient rating.

Patented compact stainless steel fire tube heat exchanger

Navien’s advanced patented stainless steel heat exchanger design is ASME‑Certified, “H” Stamped, and reduces high stress point weld failures common on other boilers. This compact, in‑house designed and manufactured heat exchanger uses the latest automated laser welding technology to deliver superior product quality.

Navien’s advanced patented stainless steel heat exchanger design is ASME‑Certified, “H” Stamped, and reduces high stress point weld failures common on other boilers. This compact, in‑house designed and manufactured heat exchanger uses the latest automated laser welding technology to deliver superior product quality.

Advanced user interface and controls

Navien’s new backlit control panel is simple and intuitive to use with its color‑coded plain text display, and an innovative click wheel that improves usability for all information input.

Built-in hardware to connect a boiler pump, 3 zone pumps or 3 zone valves

With Navien’s new PCB design you now have the ability to connect a boiler pump, 3 zone pumps or 3 zone valves, all integrated in the unit.

NFB Manifold Kits

Navien’s NFB manifold kits are ideal for hydronic space heating applications. With these manifolds, we have done the piping work for you. Both primary and secondary loop manifold kits are designed to work on all NFB models for fast and clean installations. All you need to add is your own appropriately sized pump.

  • NFB Primary Manifold Kit
    GFFM-MSOZUS-002

  • Secondary Manifold Kit
    GFFM-SKTZUS-001

Common venting up to 8 units and
cascading up to 16 units

With our cascading technology, when a unit gets up to 80% capacity determined by the supply and return temperatures, the next unit will start to help meet the hydronic space heating requirements. This boiler sequence will continue until all units are generating the needed hydronic space heat up to the maximum cascaded capacity.

The Navien cascading system also balances out the workload of each unit for longer life. The NFB is dual certified for single and 2-pipe venting applications.

NFB Models

NFB-175
NFB-175
Max Input: 175,000 BTU/H
Indoor wall-hung
Residential/Commercial
NFB-200
NFB-200
Max Input: 199,900 BTU/H
Indoor wall-hung
Residential/Commercial

Optional Wi-Fi remote control system

 

NaviLink makes it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink module attaches easily to any new or existing* Navien tankless water heater, combi‐boiler and boiler.


* Existing installations may require the purchase of a new main PCB and front control panel. Units produced on or after 2-22-16 will be compatible out of the box.

Available for Download
on IOS or Android

Optional Wi-Fi remote control system

 

NaviLink makes it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink module attaches easily to any new or existing* Navien NPE Series tankless water heater, NCB-E Series combi‐boiler and NHB Series boiler.


* Existing installations may require the purchase of a new main PCB and front control panel. Units produced on or after 2-22-16 will be compatible out of the box.

Available for Download
on IOS or Android

Optional magnetic boiler filter

The NaviClean™ is designed to work with Navien NCB-E, NHB and NFB Series boilers. It is best suited for heating systems with 1" to 1-1/4" copper or black iron pipes. It features a permanent magnet mounted inside the glass reinforced nylon housing.

Navien Rebate Finder
Installer/Service Locator
Distributor/Sales Rep
Product Registration
Training

Use our NPE sizing calculator

Download the Navisizer app

Navien Installer/Services Locator

Find the nearest Navien Service Specialist including installers and service providers.

Distributor & sales rep locator

Enter your state, city, or zip code to find a Navien Sales rep or distributor near you.

Product Registration

Online Product Registration

Navien uses the information from our web site to measure statistics such as: number of visits, pages visited, and information requested. 
Navien will never send unsolicited e-mail or share the e-mail or url address with other companies.

Customer Information


See Privacy Policy about collection and usage of your Personal Information.

Product Information



Product Serial number is 15-16 digits and can be found either on the right side of the box or the back of the front cover.
Navien, Inc. Technical Customer Service Department

Training Information

Navien Academy
Go to Calendar

In-Field Training
Find training near you