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If your home has hot water radiators in each room for heat, you have a boiler to heat the water. Like a furnace, the energy efficiency of a boiler is given as the Annual Fuel Utilization Efficiency (AFUE). Boilers manufactured since 1992 must have an AFUE of at least 80%. We offer a complete line of gas boilers starting at 80% AFUE and up.

Gas Boiler Product Offering


Navien NCB-E Combi-Boilers

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Model Family: NCB-***E
Annual Fuel Utilization Efficiency: 95.0% AFUE
Energy Star Rated: Energy Star Rated
Heat Exchanger Warranty: 10 Year Warranty
Warranty: 5 Year parts
Manufacturer's Stated Benefits:
  • 1 Year Labor Warranty
  • Compact space saving design
  • Three stainless steel heat exchangers, two for heating and one specifically for hot water
  • Total control -- freeze protection, all system set up, operations and troubleshooting available at your fingertip
  • Natural or LP gas compatibility

Navien NFB Series High efficiency Condensing Heating boiler

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Model Family: NFB-***
Annual Fuel Utilization Efficiency: 95% AFUE
Energy Star Rated: Energy Star Rated
Heat Exchanger Warranty: 15 Year Heat Exchanger Warranty
Warranty: 5 Year Part Warranty
Manufacturer's Stated Benefits:
  • One Year Limited warranty on Labor
  • Optional NaviLink Wi-Fi remote control
  • Cascading and common venting capable
  • 10:1 turndown ratio
  • Advanced user interface and controls with intuitive text display, simplifies boiler setup.
  • Built-in hardware to connect a boiler system pump, 3 zone pumps or 3 zone valves.
CGa Series 2

CGa Gas Boiler Series 2

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Model Family: CGa Series 2
Annual Fuel Utilization Efficiency: Up to 84% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Heat Exchanger Limited Warranty
Warranty: 2 Year Parts Limited Warranty
Manufacturer's Stated Benefits:
  • Compact design saves valuable living space
  • Stainless steel burners for quieter ignition, longer life, and improved combustion
  • Gas fired water boiler with cast iron sections
  • Easily accessible controls, vertical flueways and top cleaning for easy and quick servicing