Eleven. Notification Units These devices send out a visual or audible notification to warn a constructing’s occupants to evacuate. The 302-AW-135 Thermotech price-anticipation heat detector from Honeywell NOTIFIER operates in a managed number of two to three levels of their set factors, whatever the pace or price of temperature increase. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/