Navien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. The NPE series offers industry leading efficiency up to 0.97 UEF to keep your utility bills low, endless hot water so you never have a cold shower, and exclusive ComfortFlow® technology with built in recirculation that eliminates any cold water sandwich (NPE-A). Navien NCB-E and NFC are the ultimate high efficiency condensing combination boilers with the capacities to supply both heat and domestic hot water for larger homes — enough
space heat for a whole house, plus hot water to run up to 3 showers and a dishwasher all at the same time. All Navien NFB and NHB boilers have Navien’s advanced burner system. The industry’s largest turn down ratio means easier installation with multiple zones while maintaining high operational efficiencies.
Tankless Water Heaters
NPE-180A
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-210A
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-240A
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-150S
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-180S
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-210S
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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NPE-240S
High-Efficiency Condensing Tankless Water Heater
- ½ gas pipe capable up to 24′
- Field convertible gas system
- Ultra condensing efficiency
- Dual stainless steel heat exchangers
- Low NOx emissions (20ppm)
- SCH 40, 2″ venting up to 60′
- Cascading capable
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Combi-Boilers
NCB-150E
High Efficiency Condensing Combi-Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 24′
- Automatic water filling system
- Integrated controls
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NCB-180E
High Efficiency Condensing Combi-Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 24′
- Automatic water filling system
- Integrated controls
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NCB-210E
High Efficiency Condensing Combi-Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 24′
- Automatic water filling system
- Integrated controls
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NCB-240E
High Efficiency Condensing Combi-Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 24′
- Automatic water filling system
- Integrated controls
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NFC-175
High Efficiency Condensing Combi-Boiler
- Patented Compact Stainless Steel Fire Tube Heat Exchanger
- 95% AFUE and TDR up to 11:1
- Advanced Controls with Intuitive User Interface
- Primary Manifold, NaviClean™ Magnetic Filter and Isolation Valve Kit Included
- DHW Module with Mixing and Water Adjustment Valves
- Pressure Regulating Valve, Air Vent and Manifold Included
- Multiple Venting Options Up to 150’
- Common Venting Up to 8 Units and Cascading Up to 16 Units
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NFC-200
High Efficiency Condensing Combi-Boiler
- Patented Compact Stainless Steel Fire Tube Heat Exchanger
- 95% AFUE and TDR up to 11:1
- Advanced Controls with Intuitive User Interface
- Primary Manifold, NaviClean™ Magnetic Filter and Isolation Valve Kit Included
- DHW Module with Mixing and Water Adjustment Valves
- Pressure Regulating Valve, Air Vent and Manifold Included
- Multiple Venting Options Up to 150’
- Common Venting Up to 8 Units and Cascading Up to 16 Units
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Boilers
NHB-55
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 40′
- TDR up to 7:1
- Integrated controls
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NHB-80
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 40′
- TDR up to 10:1
- Integrated controls
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NHB-110
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 40′
- TDR up to 11:1
- Integrated controls
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NHB-150
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Dual stainless steel heat exchangers
- SCH40, 2″ PVC venting up to 60′
- ½” Gas pipe up to 40′
- TDR up to 15:1
- Integrated controls
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NFB-175
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Patented compact stainless steel fire tube heat exchanger
- PVC exhaust venting capable: 2″ up to 60′; 3” up to 150’
- ½” Gas pipe up to 24′ (Subject to local code)
- TDR 10:1
- Advanced user interface and controls
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NFB-200
High Efficiency Condensing Heating Boiler
- Super condensing efficiency
- Patented compact stainless steel fire tube heat exchanger
- PVC exhaust venting capable: 2″ up to 60′; 3” up to 150’
- ½” Gas pipe up to 24′ (Subject to local code)
- TDR 10:1
- Advanced user interface and controls
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NFB-301C
High Efficiency Condensing Heating Boiler
- 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
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NFB-399C
High Efficiency Condensing Heating Boiler
- 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
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