Automatic dampers in ductwork are devices used to regulate the flow of air through a ventilation system. They are typically installed in the ducts of heating, ventilation, and air conditioning (HVAC) systems to control the temperature and air flow in a building. Automatic dampers are designed to open and close in response to changes in temperature, pressure, or humidity. This helps to ensure that the air flow in the building is balanced and that the temperature is kept at a comfortable level. Automatic dampers can also be used to reduce energy costs by controlling the amount of air that is allowed to escape through the ducts. In addition, they can be used to reduce noise levels in a building by preventing the sound of air moving through the ducts from being heard. Automatic dampers are an important part of any HVAC system and can help to keep a building comfortable and energy efficient.