The National Electrical Manufacturers Association (NEMA) has published Guide for Proper Use of Smoke Detectors in Duct Applications. It was produced by the Signaling Protection and Communication Section.
This edition reflects improved detector technology and associated sensor placement in ducts resulting in improved detector performance and resultant fire/smoke capabilities in buildings. Duct-mounted sensors are designed to provide a specific type of fire protection that cannot be duplicated by any other type of system. This technical guide addresses this fact as well as new methods of detecting smoke in ducts.
The contents and forward of Guide for Proper Use of Smoke Detectors in Duct Applications may be viewed and a hard copy or electronic copy purchased for $40 by visiting NEMA’s Web site or by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or on the Web.