Eleven. Notification Equipment These units send out a visible or audible notification to warn a building’s occupants to evacuate. According to the Nationwide Fireplace Alarm and Signaling Code, several of the over are “fire basic safety functions” meant to further improve occupants’ lifetime protection or Command the spread of fire. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/