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GWB9-IH

GWB9-IH Gas Fired Water Boiler

High-efficiency, gas-fired water boiler

Features and Benefits

Energy Efficiency

  • Cast-aluminum heat exchanger—transfers heat up to three times faster than traditional cast iron exchangers
  • ENERGY STAR® qualified—meets or exceeds EPA guidelines for energy efficiency, which means energy savings
  • Electronic ignition control—monitors water temperature and maximizes efficiency by turning on the burner only when needed

Home Comfort

  • 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 systems

Reliable Performance

  • 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* gas

Warranty and Specs

  • 15-year limited warranty on heat exchanger
  • 10-year limited warranty on remaining covered components 








The GWB9-IH boiler offers an AFUE rating of 90%, which means it converts a full 90% of your fuel into usable heat. And it delivers warmth quickly with a cast-aluminum heat exchanger that transfers heat three times faster than conventional cast iron.
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Jack's Heating & Cooling,
Jan 24, 2014, 8:30 AM