What is the function of a fire damper?

A fire damper is specifically designed to prevent the spread of fire and smoke through ducts within a building. Its primary function is to close automatically in the event of a fire, thereby creating a barrier that restricts the movement of smoke and flames from one compartment of a building to another. This is crucial in maintaining the integrity of fire-resistance rated walls and ceilings, helping to protect life and property during a fire incident. Fire dampers are typically installed in HVAC ductwork, and their operation is vital to the effectiveness of a building's fire protection system.