Air flow dampers are devices used to control the amount of air that flows through a duct, vent, or other opening. They are commonly used in heating, ventilation, and air conditioning (HVAC) systems to regulate the temperature and air quality in a building. Air flow dampers can be manually operated or automated, and they can be used to adjust the amount of air that is being circulated. They are typically made of metal, such as aluminum or steel, and they come in a variety of sizes and shapes. Air flow dampers are designed to open and close in response to changes in temperature, pressure, or other environmental conditions. When the damper is open, air is allowed to flow freely through the ducts, and when it is closed, the air is blocked and cannot pass through. Air flow dampers are an important part of any HVAC system, as they help to maintain the desired temperature and air quality in a building.