With an efficiency rating of up to 90% AFUE, the Lennox GWB9-IH Boiler allows you to stay comfortable during even the coldest weather, without worrying about energy costs.
Efficiency Rating (AFUE): Up to 90% AFUE
ENERGY Qualified: ENERGY STAR®
Warranty: 15-Year Limited Warranty on Heat Exchanger; 10-Year Limited Warranty on covered parts
Fuel Source: Natural Gas; convertible to LP
Ignition: Hot Surface
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