Boilers

Whether you are looking for residential boilers or commercial boilers, look to Weil-McLain.

We offer a wide range of energy-efficient, high quality gas and oil-fired boilers for residential heating and gas-fired, oil-fired and combination oil/gas boilers for commercial use, including in restaurants, hotels, casinos and other commercial and institutional facilities.


Ultra Series 3-UE Gas Boiler


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  • 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 capability
  • 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

Reference Materials


WM97+ CT Wall Mount Gas Boiler


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  • Gas fired water boiler with cast aluminum heat exchanger
  • 70,000; 110,000 & 155,000 BTU input models at 95% AFUE
  • Stylish, compact wall mount design for easy installation, service and maintenance
  • Unique condensing stainless steel fire tube heat exchanger design
  • Built-in boiler circulator
  • Built-in primary/secondary piping option
  • Pre-wired terminal strip for quick and easy electrical connections
  • Convenient indirect-fired water heater connection
  • Capable to vent with PVC, PP and SS up to 100′
  • Multi-color LCD display with text – no codes
  • CT – Condensing Technology – 5 to 1 turndown ratio
  • Companion Water Heater Compatible

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CGa Gas Boiler Series 1 and Series 2


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  • 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
  • Up to 84% AFUE

Reference Materials



Aqua Plus Indirect Fired Water Heaters


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  • 316L Stainless Steel tank welded with “TIG and Plasma” technology coil tank
  • Temperature and pressure relief valve standard equipment
  • Thermostat connections already installed for quick and easy wiring
  • All connections including boiler supply and return, domestic water and domestic recirculation are on the side of the tank
  • Magnesium Anode installed in all tanks
  • Inspection port on every tank located near the bottom of the tank
  • Exceptional “R Value” with 2″ of dense foam insulation
  • Adjustable feet for uneven floors
  • Available in Gold and Pewter colors

Reference Materials