American Steel Buildings, LLC 1-800-511-3670 Copyright 2010Home I About Us I Contact Us I Buying Process I F.A.Q.DescriptionWall mounted accessory for allowing airflow into the building. An opening provided with fixed or movable slanted fins to allow flow of air.OptionsLouvers are available in the following sizes: 2' x 2', 3' x 2', 3' x 3', 4' x 3', 3' x 4', 4' x 4', and 5' x 4'. All louvers are self-mulling, self-flashing, and self-framing. No other trim is required. All louvers are available to match your wall finish and color. They are provided with 18-16 aluminum mesh installed in a removable frame. Standard-Duty louvers: 26 gauge construction. Heavy-Duty louvers: Have an 18 gauge frame with 20 gauge blades.Fixed louvers: Feature roll-formed blades, fixed at a 45 degree angle. Adjustable louvers: Come with a reinforced cast aluminum hand crank to operate the blades.American Steel Buildings