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.

Lennox Gas Boiler Product Offering

GWM-IE

High-efficiency, gas-modulating condensing water boiler

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Model Family: GWM-IE
Annual Fuel Utilization Efficiency: Up to 95% AFUE
Energy Star Rated: ENERGY STAR® Qualified
Heat Exchanger Warranty: 15-Year Limited Warranty on heat exchanger
Warranty: 10-Year Limited Warranty on covered components
Manufacturer's Stated Benefits:
  • Electronic ignition control--monitors water temperature and maximizes efficiency by turning on the burner only when needed
  • Stainless steel, finned-tube heat exchanger design--converts waste energy into usable heat
  • Sealed combustion--minimizes fan noise and provides quiet, soothing heat
  • Modulating capability--allows burner to fire at a rate as low as 20% of its full capacity to perfectly match your comfort needs
  • Stainless steel, finned-tube heat exchanger design--is self-cleaning and extremely durable
  • Stainless steel mesh burner--provides greater resistance to corrosion and oxidation than aluminized steel burners
  • CPVC flue condensate collector--is corrosion resistant and eliminates the use of metal in venting area
GWB9-IH

High-efficiency, gas-fired water boiler

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Model Family: GWB9-IH
Annual Fuel Utilization Efficiency: Up to 90% AFUE
Energy Star Rated: ENERGY STAR® Qualified
Heat Exchanger Warranty: 15-Year Limited Warranty on heat exchanger
Warranty: 10-Year Limited Warranty on covered components
Manufacturer's Stated Benefits:
  • 15-Year Limited Warranty on heat exchanger
  • Cast-aluminum heat exchanger--transfers heat up to three times faster than traditional cast iron exchangers
  • Electronic ignition control--monitors water temperature and maximizes efficiency by turning on the burner only when needed
  • Sealed combustion--minimizes fan noise and provides quiet, soothing heat
  • Easy integration--low temperature supply and return water makes the unit compatible with existing radiant and underfloor system
  • Durable cabinet--heavy-gauge steel cabinet and baked-on paint finish
  • Compact and versatile--allows easy installation in a basement, closet or alcove enclosure, and can be fueled by natural or LP*
GWB8-IE

Standard-efficiency, gas-fired water boiler

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Model Family: GWB8-IE
Annual Fuel Utilization Efficiency: Up to 84.4% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: 20-Year Limited Warranty on heat exchanger
Warranty: 5-Year Limited Warranty on covered components
Manufacturer's Stated Benefits:
  • Electronic ignition control--monitors water temperature and maximizes efficiency by turning on the burner only when needed
  • Thick fiberglass insulation--minimizes off-cycle heat and energy loss
  • Easy integration--works with traditional radiator systems to provide precise heating comfort, regardless of outdoor temperature
  • Cast iron heat exchanger--designed for years of long-lasting reliability
  • Titanium burners--provide greater resistance to corrosion and oxidation than competitive stainless or aluminized stell burners
  • Versatile installation--available in six sizes for installation virtually anywhere in the home
GSB8-E

Standard- efficiency, gas- fired steam boiler

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Model Family: GSB8-E
Annual Fuel Utilization Efficiency: Up to 82.7% AFUE
Energy Star Rated: N/A
Heat Exchanger Warranty: 12-Year Limited Warranty on Heat Exchanger
Warranty: 5-Year Limited Warranty on covered components
Manufacturer's Stated Benefits:
  • Titanium Burner
  • Electronic Ignition
  • Available in 7 different sizes for a perfect fit nearly anywhere in your home
  • Layers of thick fiberglass insulation minimize heat loss and on-off cycling.
  • An automatic vent damper closes when the GSB8-E shuts off, preventing wasted heat.
  • Electronic Low Water Cut off