A fire and smoke damper is a device used in air conditioning systems to prevent the spread of smoke and fire in the event of an emergency. The damper is typically installed in the ductwork of the air conditioning system and is designed to close when it detects the presence of smoke or heat. This helps to limit the spread of smoke and fire throughout the building, allowing for a safe evacuation. Fire and smoke dampers are an important part of any building’s fire safety system and are required by most building codes. They are typically tested annually to ensure they are in proper working order. Fire and smoke dampers are also important for preventing the spread of contaminants, such as asbestos, throughout the building.