You accept the use of cookies as described in our Privacy Policy by clicking 'OK'.
We totally reinvented fire tube technology from the ground up and we continue to advance our boiler technology to a higher level with the new NFB-H boiler series.
Low gas pressure operation
Negative pressure regulating gas valve ensures maximum performance all the way down to 3.5" of water column on natural gas and 8" of water column on propane gas.
Space saving and light
weight design
The sleek wall-hung design uses much less space and is substantially lighter than traditional floor standing boilers, making installations a lot easier.
Dual Venturi and field gas convertibility
Dual Venturi system creates better combustion control and turndown ratio. Field gas convertibility is easy with orifice conversion kits for NG high altitude (5,400–10,100 ft.) and LP (up to 10,100 ft.) included with NFB-H Series boilers.
Low noise levels
Installations in or near media rooms, recreation rooms or any living areas of the house are possible with the quiet running NFB-H boilers.
Up to 15:1 turndown ratio
The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling.
Navien’s advanced patented stainless steel heat exchanger is designed and manufactured in-house using robotic laser welding to deliver higher product quality. The ASME‑Certified, “H” Stamped, design also reduces high stress point weld failures common on other boilers.
Navien’s advanced patented stainless steel heat exchanger is designed and manufactured in-house using robotic laser welding to deliver higher product quality. The ASME‑Certified, “H” Stamped, design also reduces high stress point weld failures common on other boilers.
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.
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.
Navien’s NFB-H 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-H 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
With Navien’s cascading technology, when a unit gets up to 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-H is dual certified for direct and non-direct venting applications.
NaviLink & NaviLink Lite make it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink system attaches easily to any new or existing* Navien tankless water heater, combi‐boiler and boiler. NaviLink Lite is great for single residential units and magnetically mounts to the side of the unit or can easily be mounted on the wall. Also, NaviLink Lite does not require external power.
* Existing installations may require the purchase of a new main PCB and front control panel.
Available for Download
on IOS or Android
