What is the function of duct detectors in a fire alarm system?

Duct detectors are specifically designed to monitor and detect smoke within the air ducts of a building’s heating, ventilation, and air conditioning (HVAC) system. Their primary function is to identify the presence of smoke before it can circulate through the ductwork and potentially spread fire or smoke to different areas of a building. When smoke is detected, the duct detector can trigger alarms, activate suppression systems, and inform overall fire alarm systems, allowing for a timely response to potential fire hazards.

Understanding the correct function helps to emphasize the importance of duct detectors as part of a comprehensive fire safety strategy, ensuring early warning to occupants and enabling appropriate emergency action to minimize risk.