Air Flex Heating & Cooling Ltd.
Family Owned & Operated Heating and Cooling Company in Toronto
Navien NHB‑H Series
NHB-55H high efficiency Condensing Heating Boiler
- Max HTG Input: 55,000 BTU/h, Indoor wall-hung, Residential/Commercial
- High efficiency condensing
- Dual stainless steel heat exchangers
- SCH40, 2″ venting up to 65′
- 3″ venting up to 150′
- TDR up to 7:1
- Built-in zoning control
- Smart controls LCD display, quick dial wheel & Setup Wizard
NCB-190/060H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).
Vent Installation Detector (VID) for added safety.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
Built-in control for boiler pump 3 zone valves, 3 zone pumps, or 2 zone pumps and an indirect pump.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Negative pressure regulating gas valve.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Field gas convertibility.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
NHB-80H high efficiency Condensing Heating Boiler
- Max HTG Input: 80,000 BTU/h, Indoor wall-hung, Residential/Commercial
- High efficiency condensing
- Dual stainless steel heat exchangers
- SCH40, 2″ venting up to 65′
- 3″ venting up to 150′
- TDR up to 7:1
- Built-in zoning control
- Smart controls LCD display, quick dial wheel & Setup Wizard
NHB-80H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).
Vent Installation Detector (VID) for added safety.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
Built-in control for boiler pump 3 zone valves, 3 zone pumps, or 2 zone pumps and an indirect pump.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Negative pressure regulating gas valve.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Field gas convertibility.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
NHB-110H high efficiency Condensing Heating Boiler
- Max HTG Input: 110,000 BTU/h, Indoor wall-hung, Residential/Commercial
- High efficiency condensing
- Dual stainless steel heat exchangers
- SCH40, 2″ venting up to 65′
- 3″ venting up to 150′
- TDR up to 7:1
- Built-in zoning control
- Smart controls LCD display, quick dial wheel & Setup Wizard
NHB-110H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).
Vent Installation Detector (VID) for added safety.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
Built-in control for boiler pump 3 zone valves, 3 zone pumps, or 2 zone pumps and an indirect pump.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Negative pressure regulating gas valve.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Field gas convertibility.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
NHB-150H high efficiency Condensing Heating Boiler
- Max HTG Input: 150,000 BTU/h, Indoor wall-hung, Residential/Commercial
- High efficiency condensing
- Dual stainless steel heat exchangers
- SCH40, 2″ venting up to 65′
- 3″ venting up to 150′
- TDR up to 7:1
- Built-in zoning control
- Smart controls LCD display, quick dial wheel & Setup Wizard
NHB-150H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).
Vent Installation Detector (VID) for added safety.
The condensing technology of the dual stainless steel heat exchangers saves energy, reduces greenhouse gasses.
Built-in control for boiler pump 3 zone valves, 3 zone pumps, or 2 zone pumps and an indirect pump.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Negative pressure regulating gas valve.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Paired with the dual venturi the gas valve provides consistent control of the air/gas ratio. Negative regulation reduces issues on low gas pressure systems.
Field gas convertibility.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
Conversion kits for natural gas high altitude (5,400–10,100 ft.) and liquid propane (up to 10,100 ft.) are included.
NHB‑H Videos
Navien NFB-H Series
NFB-175H high efficiency Condensing Heating Boiler
- Max HTG Input: 175,000 BTU/h, Indoor wall-hung, Residential/Commercial
- 13.2:1 TDR
- 95% AFUE – Energy Star certified
- 2” venting up to 65’, 3” venting up to 150′
- Advanced controls with Intuitive user interface and Setup Wizard
- Built-in powered connections for 3 zone valves or 3 zone pumps
- Common venting up to 8 units and cascading up to 16 units
- Approved for high altitude up to 10,100 ft. (NG and LP), conversion kits included
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
NFB-175H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).Vent Installation Detector (VID)for added safety.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
Low gas pressure operation. Negative pressure regulating gas valveensures maximum performance all the way down to 3.5″ of water column on natural gas and 8″ of water column on propane gas.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Built-in control for a boiler pump, 3 zone pumps or 3 zone valves
NFB-200H high efficiency Condensing Heating Boiler
- Max HTG Input: 199,900 BTU/h, Indoor wall-hung, Residential/Commercial
- 15:1 TDR
- 95% AFUE – Energy Star certified
- 2” venting up to 65’, 3” venting up to 150′
- Advanced controls with Intuitive user interface and Setup Wizard
- Built-in powered connections for 3 zone valves or 3 zone pumps
- Common venting up to 8 units and cascading up to 16 units
- Approved for high altitude up to 10,100 ft. (NG and LP), conversion kits included
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
NFB-200H premium features and benefits
2″ venting up to 65′;
3” up to 150’ (including schedule 40 PVC).Vent Installation Detector (VID)for added safety.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
Dual Venturi system creates better combustion control, turndown ratio and easy field gas conversions.
Low gas pressure operation. Negative pressure regulating gas valveensures maximum performance all the way down to 3.5″ of water column on natural gas and 8″ of water column on propane gas.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Built-in control for a boiler pump, 3 zone pumps or 3 zone valves
NFB‑H Videos
Navien NFB‑C Series
NFB-301C Commercial fire tube boilers
- Max HTG Input: 301,000 BTU/h, Indoor wall-hung, Residential/Commercial
- 97.5% TE Industry Leading Thermal Efficiency
- Patented stainless steel fire tube heat exchanger
- 160 PSI maximum operating pressure
- Advanced controls with intuitive 7” color display
- Up to 15:1 TDR (turndown ratio)
- BAS communication capability
- Common vent up to 4 and cascade up to 32 units
- Top & bottom piping
NFB-301C premium features and benefits
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.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Dual Venturi and field gas convertibility. Dual Venturi system creates better combustion control and turndown ratio. Orifice for easy field gas convertibility from NG to LP. Conversion kits included.
Top and bottom piping
Easy pipe connections for floor or wall-hung installations.
Easy pipe connections for floor or wall-hung installations.
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.
Built-in hardware connects boiler pump & 3 zone pumps. All integrated into the NFB-C circuit board. Also includes a DHW priority zone
Advanced 7″ touch screen controls Easy intuitive navigation for setup, troubleshooting and operation.Built-in USB port
Download boiler data and settings. Upload software updates and boiler settings.
Download boiler data and settings. Upload software updates and boiler settings.
NFB-399C Commercial fire tube boilers
- Max HTG Input: 399,000 BTU/h, Indoor wall-hung, Residential/Commercial
- 97.5% TE Industry Leading Thermal Efficiency
- Patented stainless steel fire tube heat exchanger
- 160 PSI maximum operating pressure
- Advanced controls with intuitive 7” color display
- Up to 15:1 TDR (turndown ratio)
- BAS communication capability
- Common vent up to 4 and cascade up to 32 units
- Top & bottom piping
NFB-399C premium features and benefits
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.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Dual Venturi and field gas convertibility. Dual Venturi system creates better combustion control and turndown ratio. Orifice for easy field gas convertibility from NG to LP. Conversion kits included.
Top and bottom piping
Easy pipe connections for floor or wall-hung installations.
Easy pipe connections for floor or wall-hung installations.
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.
Built-in hardware connects boiler pump & 3 zone pumps. All integrated into the NFB-C circuit board. Also includes a DHW priority zone
Advanced 7″ touch screen controls Easy intuitive navigation for setup, troubleshooting and operation.Built-in USB port
Download boiler data and settings. Upload software updates and boiler settings.
Download boiler data and settings. Upload software updates and boiler settings.
NFB-C Videos
Navien NCB-H COMBI Water Boilers
Navien NCB-190/060H high efficiency Condensing Combi-Boiler
- Max HTG Input: 60,000 BTU/hMax DHW Input: 160,000 BTU/hIndoor wall-hung Residential
- Smart controls LCD display, quick dial wheel & Setup Wizard
- Advanced stainless steel dual heat exchangers
- 15:1 DHW and up to 5.5:1 heating TDR
- Field convertible gas system (NG/LP) up to 10,100 ft.
- Capable of cascading up to 15 NPE water heaters
- Capable of common venting up to 7 NPE water heaters
- Built-in 3 zone pumps and 3 zone valves powered connections
- 2” venting up to 65′ and 3” venting up to 150′
NCB-190/060H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
Navien NCB-190/080H high efficiency Condensing Combi-Boiler
- Max HTG Input: 80,000 BTU/hMax DHW Input: 160,000 BTU/hIndoor wall-hungResidential
- Smart controls LCD display, quick dial wheel & Setup Wizard
- Advanced stainless steel dual heat exchangers
- 15:1 DHW and up to 7.3:1 heating TDR
- Field convertible gas system (NG/LP) up to 10,100 ft.
- Capable of cascading up to 15 NPE water heaters
- Capable of common venting up to 7 NPE water heaters
- Built-in 3 zone pumps and 3 zone valves powered connections
- 2” venting up to 65′ and 3” venting up to 150′
NCB-190/080H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
Navien NCB-240/110H high efficiency Condensing Combi-Boiler
- Max HTG Input: 110,000 BTU/hMax DHW Input: 199,900 BTU/hIndoor wall-hungResidential
- Smart controls LCD display, quick dial wheel & Setup Wizard
- Advanced stainless steel dual heat exchangers
- 15:1 DHW and up to 8.5:1 heating TDR
- Field convertible gas system (NG/LP) up to 10,100 ft.
- Capable of cascading up to 15 NPE water heaters
- Capable of common venting up to 7 NPE water heaters
- Built-in 3 zone pumps and 3 zone valves powered connections
- 2” venting up to 65′ and 3” venting up to 150′
NCB-240/110H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
Navien NCB-240/130H high efficiency Condensing Combi-Boiler
- Max HTG Input: 130,000 BTU/hMax DHW Input: 199,900 BTU/hIndoor wall-hungResidential
- Smart controls LCD display, quick dial wheel & Setup Wizard
- Advanced stainless steel dual heat exchangers
- 15:1 DHW and up to 10:1 heating TDR
- Field convertible gas system (NG/LP) up to 10,100 ft.
- Capable of cascading up to 15 NPE water heaters
- Capable of common venting up to 7 NPE water heaters
- Built-in 3 zone pumps and 3 zone valves powered connections
- 2” venting up to 65′ and 3” venting up to 150′
NCB-240/130H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
Navien NCB-250/150H high efficiency Condensing Combi-Boiler
- Max HTG Input: 150,000 BTU/hMax DHW Input: 210,000 BTU/hIndoor wall-hungResidential
- Max HTG Input: 130,000 BTU/hMax DHW Input: 199,900 BTU/hIndoor wall-hungResidential
- Smart controls LCD display, quick dial wheel & Setup Wizard
- Advanced stainless steel dual heat exchangers
- 15:1 DHW and up to 11:1 heating TDR
- Field convertible gas system (NG/LP) up to 10,100 ft.
- Capable of cascading up to 15 NPE water heaters
- Capable of common venting up to 7 NPE water heaters
- Built-in 3 zone pumps and 3 zone valves powered connections
- 2” venting up to 65′ and 3” venting up to 150′
NCB-250/150H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Durable dual condensing stainless steel heat exchangers recover extra heat for maximum efficiency.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
NCB-H Videos
Navien NFC-H Condensing Fire Tube COMBI Water Boilers
Navien NFC-250/175H Combi-Boiler
- Max HTG Input: 175,000 BTU/h
Max DHW Input: 210,000 BTU/h
Indoor wall-hung
Residential/Commercial.
- 95% AFUE – Energy Star certified
- DHW 15:1 TDR and heating 13:1 TDR
- 2” venting up to 65’, 3” venting up to 150′
- Advanced controls with intuitive user interface and Setup Wizard
- NEW DHW module with mixing and water adjustment valves
- Built-in powered connections for 3 zone valves or 3 zone pumps
- Common venting with up to 7 NPE units and cascading up to 15 NPE units
- Approved for high altitude up to 10,100 ft. (NG and LP), conversion kits included
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
NFC-250/175H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Advanced circuitry with built-in control for 3-zone pumps or 3-zone valves.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
Navien NFC-250/200H Combi-Boiler
- Max HTG Input: 199,900 BTU/h
Max DHW Input: 210,000 BTU/h
Indoor wall-hung
Residential/Commercial.
- 95% AFUE – Energy Star certified
- DHW 15:1 TDR and heating 15:1 TDR
- 2” venting up to 65’, 3” venting up to 150′
- Advanced controls with intuitive user interface and Setup Wizard
- NEW DHW module with mixing and water adjustment valves
- Built-in powered connections for 3 zone valves or 3 zone pumps
- Common venting with up to 7 NPE units and cascading up to 15 NPE units
- Approved for high altitude up to 10,100 ft. (NG and LP), conversion kits included
- Patented stainless steel fire tube heat exchanger with non-metallic condensate base
NFC-250/200H premium features and benefits
2″ PVC venting up to 65 feet including economical schedule 40 PVC.Vent Installation Detector (VID) for added safety.
Dual Venturi system creates better combustion control and turndown ratio and easy field gas conversions.
Patented stainless steel fire tube heat exchanger Navien’s innovative heat exchanger design is ASME‑Certified,“H” Stamped, and reduces high-stress point weld failures common on other combi-boilers.
Advanced user interface with Setup Wizard is made easy with backlit panel, click-wheel control and intuitive text.
Advanced circuitry with built-in control for 3-zone pumps or 3-zone valves.
Easily accessible built-in DHW module includes integrated boiler pump, flow adjustment valve, DHW stainless steel heat exchanger, mixing valve and 3-way valve.
NFC-H Videos
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