Navien COMBI Water Boilers

Air Flex Heating & Cooling Ltd.

Family Owned & Operated Heating and Cooling Company in Toronto

Navien NHB combi Water Boilers

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Navien innovation in a compact wall-hung condensing boiler

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 combi-boilers. The new NHB boiler series is the next in line of innovations from Navien. All NHB boilers have Navien’s advanced burner system, an industry-leading AFUE of 95% and turn down ratios up to 15:1.

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

15:1 – T U R N D O W N R A T I O

Industry’s largest turn down ratio in the NHB-150 providing ease of installation with multiple zones while maintaining high operational efficiencies.

NHB Integrated control

The integrated control provides industry leading options and features in the boiler operation parameters, including:

Adjustable heat capacity.
A timed hydronic supply water boost feature.
Adjustable anti-cycle timer.
Freeze protection.
Pressure LWCO with manual reset.
Adjustable minimum burner time setting.
Adjustable turn down ratio timing.
Outdoor reset and domestic hot water priority.
Adjustable outdoor temperature reset curves.
Field gas convertible.

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

With our cascading technology, when a unit gets up to 80% capacity determined by the supply and return temperatures, the next unit will enable to help meet the hydronic space heating requirements.

This hydronic space heating requirement and demand ratio 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 NHB is dual certified for single and 2-pipe venting applications.

Optional Wi-Fi remote control systems

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.

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Navien NFC-H Condensing Fire Tube Combi-boilers

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New NFC-H highest heating and DHW performance ever built into one compact combi-boiler

Navien innovation, durability and proved fire tube technology has done it again. The new NFC-H has more heating and DHW capacities for today’s larger progressive homes. Navien continues to reinvent smarter ways to bring high efficiency home comfort to your customers. Also Navien continues to make installation and set-up easier for contractors.

The #1 selling combi-boilers.

Navien is the #1 manufacturer of
combi-boilers in North America.^*

Navien takes high efficiency fire tube combi technology to new heights

Highest DHW maximum BTU’s in residential combi-boilers…
up to 210,000 per hour *
Highest DHW flow rate @ 70°F rise…
up to 5.4 GPM
Highest residential combi DHW TDR… 15:1 for all models
Highest residential combi heating
TDR… up to 15:1
Built-in zone controls for up to three zone valves or zone pumps
Cascade capable with up to 15 NPE tankless water heaters for expanded DHW flow
High altitude certification… up to 10,100 feet (NG or LP)
Lowest minimum fire BTU/H (13,300) for whole house** residential combi-boilers.

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

Dual inputs of 210,000 BTU/H for DHW and up to 199,900 BTU/H for heating

Satisfies all the space heating and domestic hot water requirements of most typical large homes.

Space saving and light weight design

Navien’s sleek wall-hung combi-boilers occupy 80% less space than traditional floor standing boilers and tank water heaters.

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.

Easy access to DHW module and valves

All components of DHW module including water feed valve, flow adjustment valve, mixing valve and 3-way valve are right behind circuit board for easy serviceability.

TDR 15:1 for DHW and up to 11:1 for heating

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

Patented 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 combi-boilers.
This compact, in‑house designed and manufactured heat exchanger uses the latest automated laser welding technology to deliver superior product quality.

Built-in DHW module now with advanced performance

Navien’s new innovative domestic hot water heat exchanger now generates even more hot water, giving customers the ability to run up to 3 showers and a dishwasher, all at the same time with 5.4 gallons per minute at a 70°F temperature rise.

Advanced user interface control with setup wizard

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

Built-in hardware to connect up to 3 zone pumps or 3 zone valves

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

Optional magnetic boiler filter

The NaviClean™ is designed to work with Navien NFC-H 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.

The NFC-H can be cascaded with up to 15 Navien NPE tankless water heaters

Common vent up to 8 units

One NFC-H combi-boiler can be common vented with up to 7 NPE tankless water heaters. The NFC/NPE systems are approved for single pipe (exhaust) and dual pipe (fresh air intake and exhaust) installations.

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Navien NCB-H Condensing Combi-Boiler

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Optimized for ultimate combi-boiler DHW performance

NCB-H offers industry leading DHW features including the highest maximum BTU/h for DHW (210,000), highest flow rate of 5.4 GPM at 70° rise and a DHW turndown ratio of 15:1.

The #1 selling combi-boilers.

Navien is the #1 manufacturer of
combi-boilers in North America^*

*According to BRG

Aim high with Navien… High efficiency, High output,
High performance, all in one compact combi

Highest DHW maximum BTU’s in residential combi-boilers…
up to 210,000 per hour
Highest DHW flow rate @ 70°F rise…
up to 5.4 GPM
Highest number of BTU sizes for
the North American residential
combi-boiler market
Highest residential combi DHW TDR…
15:1 for all models
Highest residential combi heating
TDR… up to 11:1
Built-in zone controls for up to three zone valves or zone pumps
Cascade capable with up to 15 NPE tankless water heaters for expanded DHW flow
High altitude certification… up to 10,100 feet (NG or LP)
Lowest minimum fire BTU for residential combi-boilers… as low as 10,700

New Navien NCB-H… the complete combi package and no compromises

Navien’s innovation and technological advancements have done it again. The new NCB-H is taking combi performance to the highest levels. As the competition tries to get closer, Navien ingenuity keeps advancing their lead.

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

Dual stainless steel heat exchangers for heating

Durable stainless steel heat exchangers resist corrosion, resulting in longer life and improved heat recovery from flue gases for superior efficiency.

Up to 5.4 GPM @ 70°F temperature rise for DHW

Separate stainless steel flat plate heat exchanger for DHW creates the lightest flow rates for any combi-boiler in the industry.

Dual Venturi and field gas convertibility

Dual Venturi system creates better combustion control and turndown ratio. Orifice conversion kit for easy field gas convertibility from NG to LP is included with every NCB-H Series combi-boiler.

Easy access to DHW module and valves

All components of DHW module including water feed valve, flow adjustment valve, mixing valve and 3-way valve are right behind circuit board for easy serviceability.

TDR 15:1 for DHW and up to 11:1 for heating

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

Dual stainless steel heat exchanger

Designed for exceptional heating performance and longevity

Heating up to
150,000
BTUs per hour

Built-in DHW module now with higher performance

Navien’s NCB-H generates enough hot water to run up to 3 showers and a dishwasher at the same time.

Expanded DHW capability

For increased domestic hot water flow demand, the NCB-H
can be cascaded and common vented with up to 15 of our NPE tankless water heaters.

Optional recirculation valve for NCB-H combi-boilers

NaviCirc is a simple plumbing device that uses existing hot and cold water lines to reduce the wait time for hot water at the faucet without the need for dedicated recirculation return line.

Optional Wi-Fi remote control systems

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 or 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.

Optional hot water activation system for all NCB-H units

At the push of a button, the Navien HotButton hot water system activates the internal recirculation pump and gas fired burner to heat water in the supply lines to provide hot water whenever it’s needed.