Every single wiring has a singular tackle or selection to detect each addressable smoke detector and linked gadget rapidly. 6. What exactly is a Zone in a fireplace alarm program? The PAD200-DUCTR is designed and designed to satisfy all local demands, along with the NFPA restrictions regarding duct smoke detectors. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/