A vital component in passive fire protection systems, this device is installed within air ducts and automatically closes upon detection of heat. Its primary function is to prevent the spread of fire and smoke through the ductwork, compartmentalizing the building and allowing occupants more time to evacuate safely. For example, in a commercial building with a fire originating in one office, this device will automatically shut within the duct connected to that office, stopping the flames and smoke from traveling to other parts of the building via the ventilation system.
The significance of these safety mechanisms stems from their contribution to life safety and property preservation. By limiting the spread of fire, they reduce the damage caused by flames and smoke, minimizing financial losses and facilitating faster recovery after a fire incident. Historically, these systems evolved in response to catastrophic fires that demonstrated the rapid spread of flames through unprotected ductwork. The inclusion of these devices is now mandated by building codes and regulations to enhance overall fire safety.