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  • GSB8-E

    Built with high-quality materials, including titanium burners and a cast iron heat exchanger, the GSB8-E boiler quietly and efficiently supplies your home with cozy, comfortable warmth.
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  • GWB8-E

    Constructed of high-quality materials, including a cast iron heat exchanger and stainless steel burners, the GWB8-E boiler delivers reliable heating performance season after season.
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  • GWB8-IE

    The GWB8-IE boiler is full of features that provide years of heating benefits, including a cast-iron heat exchanger and titanium burners. With efficiency ratings of up to 84.4%, the GWB8-IE can also deliver significant energy savings, compared to an older
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  • GWB9-IH

    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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  • GWM-IE

    Designed to maximize fuel savings, the GWM-IE boiler delivers up to 40% greater efficiency than conventional boilers. Its burner matches heating output to household demand, using only the energy necessary to keep you comfortable.
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