An automatic damper is a device that is used to regulate the flow of air or other gases in a duct system. It is typically used in heating, ventilation, and air conditioning (HVAC) systems to control the temperature and air flow in a space. Automatic dampers are designed to open and close based on the current temperature in the space, allowing for the desired temperature to be maintained. They are also used to control the amount of air entering and exiting a space, which can help to reduce energy costs. Automatic dampers are usually installed in ducts, but they can also be used in wall and ceiling vents. Automatic dampers are typically made of metal, such as aluminum or steel, and they come in a variety of sizes and shapes. They are usually operated by an electric motor, but they can also be operated manually. Automatic dampers are a great way to improve the efficiency of an HVAC system, as they help to maintain the desired temperature and air flow in a space.