The Guardian Single-Stage, Non-Condensing Gas Furnace will keep your household warm and cozy during the cold-weather months. With 80 percent AFUE (Annual Fuel Utilization Efficiency) gas efficiency, sleek cabinet dimensions and redesigned features for easy installation and servicing, you can rest comfortably knowing you’ve made a good investment for many years to come. These compact units employ induced combustion, reliable hot surface ignition and high heat transfer aluminized tubular heat exchangers. The units are factory shipped for installation in upflow or horizontal applications and may be converted for downflow applications. These furnaces are designed for residential installation in a basement, closet, alcove, attic, recreation room or garage and are also ideal for commercial applications. All units are factory assembled, wired and tested to assure safe dependable and economical installation and operation.