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GWB9-IH Boiler

Engineered for lasting comfort and energy savings



    Here are some of the top features of the GWB9-IH:

    • Efficiency rating of 90% AFUE.
    • ENERGY STAR® certified which means it meets or exceeds U.S. federal guidelines for energy efficiency.
    • Cast-aluminum heat exchanger transfers heat up to three times faster than traditional cast-iron exchangers.
    • Easy integration with traditional radiator systems to provide precise heating comfort, regardless of outdoor temperatures.

Energy Efficiency

    • Cast-aluminum heat exchanger—transfers heat up to three times faster than traditional cast iron exchangers
    • ENERGY STAR® certified—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


    • 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


GWB9-IH Boiler Product Brochure