Siemens FDBZ492

DescriptionThe Siemens ? Fire Safety Model ?FDBZ?-series of airduct-detector housings are designed to be used with the Siemens Model ?H?-series, ?FD?-series and the Model OP121 detectors. Designed for installation directly to heating, ventilating and air-conditioning (HVAC) duct systems, the Model ?FDBZ?-series complies with National Fire Protection Association Standard (NFPA) No.?s 72 and 90A, and is Underwriters? Laboratories Listed. When equipped, the air-duct detector housing will signal the presence of smoke being carried through the duct system. Air-duct detectors are not intended to be substituted for open-area detection.