Supplementary to Audible Alarms: VADs are particularly productive in large-sounds regions or exactly where Listening to protection is worn, supplementing common audible alarms. As a way to stay clear of discrimination, BS EN fifty four-23 compliant VADs may be put in in all sanitary accommodation (not simply WCs) and all https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/