Asenware AW-CSD313 Duct Type Smoke Detector

Duct Smoke Detector Diameter of sampling tube shoule be around 1 in.make 10-12 evenly spaced holes of around 5mm diameter each holes must face the direction of air flow be sure to seal the duct Duct Type Smoke Detector  Diameter of sampling tube shoule be around 1 in.make 10-12 evenly spaced holes of around 5mm diameter each holes must face the direction of air flow be sure to seal the duct where the tube protrudes comply with nfpa 72.90aand 101 First Name