Can detectors be installed within an air duct system as a substitute for open area protection?

Detectors installed within an air duct system cannot serve as a substitute for open area protection due to the differences in their purpose and functionality. Open area protection is designed to detect smoke or heat in larger spaces where people may occupy, facilitating early warning and aiding in safe evacuation. In contrast, duct detectors are specifically engineered to monitor air flows and detect smoke that may be transported through a ventilation system.

Duct detectors play a crucial role in maintaining air quality and preventing the distribution of smoke from a fire throughout the building. However, they do not provide comprehensive coverage of open areas. By relying solely on duct detectors, there would be a significant risk of not adequately detecting smoke or heat in the larger open areas, where occupants may be present, leading to delayed responses to potential fire threats. Therefore, the installation of detectors in air ducts cannot replace the need for dedicated fire detection in open spaces.