|Efficiency||Up to 90% AFUE|
|Fuel Source||Natural Gas; convertible to LP|
|Burner Type||Stainless Steel|
|Warranty||15-Year Limited Warranty on Heat Exchanger; 10-Year Limited Warranty on covered parts|
Lennox GWB9-IH Boiler
High-Efficiency, Gas-Fired Water Boiler.
Engineered for lasting comfort and energy savings. With an efficiency rating of up to 90% AFUE, the GWB9-IH Boiler allows you to stay comfortable during even the coldest weather, without worrying about energy costs.