An air vent damper is a device used to regulate the flow of air in a ventilation system. It is typically used to control the temperature of a room or area by controlling the amount of air that is allowed to enter or exit. The damper is typically installed in the ductwork of a ventilation system and is operated by a motor or manual lever. It can be used to regulate the air flow to different rooms or areas, or to control the overall air flow of the entire system. The damper can also be used to prevent drafts from entering a room or area, or to reduce noise from a ventilation system. Air vent dampers are an important part of any ventilation system, as they are used to ensure that the air flow is balanced and efficient.