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Gas Boilers

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 and oil boilers starting at 80% AFUE and up.

Gas Boiler Product Offering

GenGBStain

Stainless Steel Gas Boiler

Model Family: GenGBStain
Annual Fuel Utilization Efficiency: Up to 96.5% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: Limited warranty upon timely registration.
Warranty: Limited warranty upon timely registration.
Manufacturer's Stated Benefits:
  • Stainless Steel Fire Tube Heat Exchanger with non-metallic base
  • Modulating Condensing Boiler with 10:1 Turndown
GenGBAlum

Aluminum Gas Boiler

Model Family: GenGBAlum
Annual Fuel Utilization Efficiency: Up to 94.1% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: Limited warranty upon timely registration.
Warranty: Limited warranty upon timely registration.
Manufacturer's Stated Benefits:
  • Gas fired water boiler with cast aluminum heat exchanger
  • Designed to operate in low temperature condensing applications
  • High grade stainless steel burner features quiet operation
GenGBCast

Cast Iron Gas Boiler

Model Family: GenGBCast
Annual Fuel Utilization Efficiency: Up to 85.1% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: Limited warranty upon timely registration.
Warranty: Limited warranty upon timely registration.
Manufacturer's Stated Benefits:
  • Gas fired water boiler with cast iron sections
  • Natural draft and direct exhaust capability
  • Can be used with natural or propane gas
GenGBSteam

Cast Iron with Steam Gas Boiler

Model Family: GenGBSteam
Annual Fuel Utilization Efficiency: Up to 84% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: Limited warranty upon timely registration.
Warranty: Limited warranty upon timely registration.
Manufacturer's Stated Benefits:
  • A versatile gas cast iron boiler for water or steam applications
  • Cast iron heat exchanger
  • Configured for Natural Gas, intermittent electronic ignition only