Combination louvers act as a louver/damper combination. They utilize fixed louver blades in the front and adjustable blades in the rear that can be opened or closed. These louvers are popular for warehouse applications and other structures in which you want to close the airflow without the use of a damper. The operable blades are opened and closed manually, or with the use of an actuator. Combination louvers can incorporate both drainable and non-drainable blades which are selected based on the structure’s performance needs. Click here to view Ruskins' Combination Louver products.