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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

EVG

Evergreen Gas Boiler

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Model Family: EVG
Annual Fuel Utilization Efficiency: Up to 96.5% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Heat Exchanger Warranty
Warranty: 2 Year Parts Warranty
Manufacturer's Stated Benefits:
  • Stainless Steel Fire Tube Heat Exchanger with non-metallic base
  • Floor Standing Boiler with optional wall mount kit
  • Modulating Condensing Boiler with 10:1 Turndown
  • 4 Pump/Auxiliary Outputs
  • Up to 8 Multiple Boiler Control with lead/lag rotation
  • Modbus® to BMS connectivity
  • Each input can be assigned to a priority (Up to 3 Priorities)
  • Multiple Inputs can be assigned one priority (Zone Based Control)
  • All Lag Boiler Inputs and Output can be used
  • 0-10 Volt Input (modulation or set point)
  • Configurable Auxiliary Input/Output System
  • Boiler Circulator Included
UG

Ultra Gas Boiler

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Model Family: UG
Annual Fuel Utilization Efficiency: Up to 94.1% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Heat Exchanger Warranty
Warranty: 2 Year Parts Warranty
Manufacturer's Stated Benefits:
  • Gas fired water boiler with cast aluminum heat exchanger
  • Venturi mixing body mixes air and gas providing higher efficiency
  • Designed to operate in low temperature condensing applications
  • Outdoor reset and domestic hot water priority standard
  • Negative regulated gas valve precisely delivers gas to the boiler
  • U-Control gives you the power for easy set-up and maintenance
  • Modulates with 5 to 1 turn-down ratio
  • Variable speed motor matches combustion output to heating needs
  • High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications
CGi

Gas Boiler Series 3

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Model Family: CGi
Annual Fuel Utilization Efficiency: Up to 85.1% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Heat Exchanger Warranty
Warranty: 2 Year Parts Warranty
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
  • All units are factory-tested
  • Compact design saves valuable living space
  • No vertical draft hood and no mechanical vent dampe
  • Intermittent electronic ignition with standard components for easy servicing
CGa

Gas Boiler Series 2

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Model Family: CGa
Annual Fuel Utilization Efficiency: Up to 84% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Heat Exchanger Warranty
Warranty: 2 Year Parts 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

Oil Boiler Product Offering

ULTRA

Ultra Oil Boiler

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Model Family: ULTRA
Annual Fuel Utilization Efficiency: 87% AFUE
Energy Star Rated: ENERGY STAR®
Heat Exchanger Warranty: 12 Year Limited Heat Exchanger Warranty
Warranty: 2 Year Limited Warranty
Manufacturer's Stated Benefits:
  • Optional Advanced Features Module that provides indoor/outdoor reset, DHW priority, stage firing and more
  • Dedicated water-only oil boiler
  • Flexible direct or chimney venting - no power assisted fan needed
  • Reversible swing-away burner door
  • Three-pass cast iron heat exchanger with captured elastomer seals
WTGO

WTGO Oil Boiler

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Model Family: WTGO
Annual Fuel Utilization Efficiency: Up to 87% AFUE
Energy Star Rated: ENERGY STAR®
Heat Exchanger Warranty: 12 Year Limited Heat Exchanger Warranty
Warranty: 2 Year Limited Warranty
Manufacturer's Stated Benefits:
  • Oil-fired water boiler with cast iron sections
  • High capacity / high efficiency tankless heater
  • Quick open top and swing-away burner door with full chamber access increases visibility for inspection and servicing
  • Includes factory-wired circulator, service switch and Weil-McLain exclusive captured elastomer seals for added reliability
  • Recessed target wall design protects unit from flue brushes
  • Two flue outlets- rear and top - for complete venting flexibility
  • Available assembled or as a knockdown for installation areas with limited space
WGO

WGO Oil Boiler

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Model Family: WGO
Annual Fuel Utilization Efficiency: Up to 87% AFUE
Energy Star Rated: ENERGY STAR®
Heat Exchanger Warranty: 12 Year Limited Heat Exchanger Warranty
Warranty: 2 Year Limited Warranty
Manufacturer's Stated Benefits:
  • Dedicated water-only oil boiler with cast iron sections - no tankless heater or cover plate
  • Quick open top and swing-away burner door with full chamber access increases visibility for inspection and servicing
  • Two flue outlets- rear and top - for complete venting flexibility
  • Recessed target wall design protects unit from flue brushes
  • Includes factory-wired circulator, service switch and Weil-McLain exclusive captured elastomer seals for added reliability
SGO

SGO Oil Boiler

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Model Family: SGO
Annual Fuel Utilization Efficiency: 84% AFUE
Energy Star Rated: No
Heat Exchanger Warranty: 12 Year Limited Heat Exchanger Warranty
Warranty: 2 Year Limited Warranty
Manufacturer's Stated Benefits:
  • Oil-fired steam boiler with cast iron sections and tankless heater opening
  • Has large water content for longer steaming times
  • Two flue outlets- rear and top - for complete venting flexibility
  • Includes factory-wired circulator, service switch and Weil-McLain exclusive captured elastomer seals for added reliability
  • Quick open top and swing-away burner door with full chamber access increase visibility for inspection and servicing
  • Recessed target wall design protects unit from flue brushes