Supplementary to Audible Alarms: VADs are especially successful in large-sound places or the place hearing safety is worn, supplementing standard audible alarms. As a way to steer clear of discrimination, BS EN fifty four-23 compliant VADs can be set up in all sanitary accommodation (not merely WCs) and all resort https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/