Supplementary to Audible Alarms: VADs are particularly efficient in substantial-sounds spots or where hearing safety is worn, supplementing classic audible alarms. In order to stay clear of discrimination, BS EN fifty four-23 compliant VADs can be set up in all sanitary accommodation (not only WCs) and all hotel bedrooms, university https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/