Navien Heating Boiler

NHB-H Series

Condensing Heating Boiler
Navien Innovation In A Compact, Wall-Hung Condensing Boiler

The #1 Selling Wall-Hung Boilers.

As the leader in condensing technology, Navien has already reinvented the water heating industry with the award-winning NPE tankless water heaters and the NCB-H combi-boilers. Our new NHB-H boiler series is the next in a long line of innovations from Navien. All boilers have Navien’s advanced burner system, an industry-leading AFUE of 95% and turndown ratios up to 15:1.

Now available in four sizes: NHB-55H, NHB-80H, NHB-110H and NHB-150H.

15:1 TURNDOWN RATIO

The industry’s largest turndown ratio in the NHB-150H minimizes short cycling and provides better reaction to changing heating demands throughout the year.

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

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

Advanced Interface & 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 for easy navigation through setup, operation, diagnostics, and more.

Cascade Up To 16 Units & Common Vent Up To 8 Units

Navien’s two largest condensing boilers, NHB-110H & NHB-150H, can be cascaded and common vented

With our cascading technologies, the number of units operating is determined by system demand to meet hydronic space heating requirements. As demand increases additional units are enabled to meet higher heating requirements. Conversely, as system demand decreases, the number of operating units decreases until the heating requirement is met.

The Navien cascading system also balances out the workload of each unit for a longer service life. The NHB-H is also certified for common venting, reducing the venting and number of terminations required.

NHB-H Models

NHB-55H

Max HTG Input: 55,000 BTU/h
Indoor wall-hung
Residential/Commercial

NHB-80H

Max HTG Input: 80,000 BTU/h
Indoor wall-hung
Residential/Commercial

NHB-110H

Max HTG Input: 110,000 BTU/h
Indoor wall-hung
Residential/Commercial

NHB-150H

Max HTG Input: 150,000 BTU/h
Indoor wall-hung
Residential/Commercial

NFB-H Series

High efficiency Condensing Heating Boiler

Navien keeps raising the bar higher and higher in fire tube boiler innovations

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.

Patented stainless steel fire tube heat exchanger—reduces high stress point welds
Advanced user interface with intuitive text display and Quick Dial Wheel for easy navigation
Smart controls with Setup Wizard to simplify boiler start up
Built-in 3 zone pumps or 3 zone valves powered connections
Optional NaviLink Wi-Fi remote control
Common venting up to 8 boilers
Cascading up to 16 boilers
Up to 15:1 turndown ratio
AFUE 95.0%—Energy Star certified
Compact, light weight, wall hung design saves space over traditional floor standing boilers

COMPARE these advantages and see why NFB-H boilers are the right fit for small and large homes

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 NFC-H Series combi-boilers

Uses Existing 1/2" Gas Piping

Save time and cost in retrofit application by reusing existing ½” gas lines for up to 24' in length. Subject to local code.

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.

Patented Stainless Steel Fire Tube Heat Exchanger With Laser Weld Technology

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.

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.

Common Venting Up To 8 Units And Cascading Up To 16 Units

With Navien’s new PCB design you now have the ability to connect 3 zone pumps.

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.

NFB-H Models

NFB-175H

Max HTG Input: 175,000 BTU/h
Indoor wall-hung
Residential/Commercial

NFB-200H

Max HTG Input: 199,900 BTU/h
Indoor wall-hung
Residential/Commercial

NFB-C Series

Commercial Fire Tube Boilers

Navien’s high efficiency fire tube condensing technology make NFB-C hard to beat and the easy choice for today’s commercial boiler applications

The #1 Selling Wall-Hung Boilers.

Navien is the #1 manufacturer of wall-hung boilers in North America *According to BRG

Navien does it all from start to finish...making NFB-C the total package

Robotic and automated manufacturing technology for unmatched quality control.
In-house designed and built components, for system matched compatibility...unlike most competitors who use the same out-sourced parts to build their boilers.
Lower installation costs with our innovative engineered compact wall hung design, intuitive controls, top or bottom piping connections and flexible venting options.
Lower operating costs with the industry’s leading thermal effciency at TE 97.5%...
ENERGY STAR® Certified
Cascading and common venting capable.
Best-in-class training and technical support.
One of the industry’s best warranties.
Top and bottom piping connections for either floor or wall installations.
BMS connectivity (Modbus, BACnet and LonWorks).
High altitude installations up to 10,100 ft.

Patented compact stainless steel fire tube heat exchanger

Navien’s ASME-certified, “H” stamped stainless steel fire tube heat exchangers are in-house designed and built by the latest in robotic and automated technology, reducing high stress point weld failures common on other boilers.

Compare These Advantages To Other Boilers

15:1 Industry Leading Turndown Ratio

The sophisticated gas flow control system provides a high turndown ratio which reduces energy waste and excessive boiler cycling while also enhancing temperature control for DHW.

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 3" venting for up to 60', or up to 150' with 4" venting.

Space Saving

The sleek wall - hung design uses much less space 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. Orifice conversion kit for easy gas convertibility from NG to LP is included with every NFB-C boiler.

Air Intake Filter

This heavy duty inlet air filter has easy access for cleaning and filter media replacement

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.