Visibility and Quantity: Make sure that visual alarms are sufficiently numerous and put strategically to generally be obvious from all spots. Universal Recognition: VADs are intended to give a common warning sign that is well recognizable by Everybody, irrespective of their amount of Listening to or cognitive skill. The Place https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/