Visibility and Number: Be sure that visual alarms are sufficiently various and positioned strategically for being visible from all spots. To be able to avoid discrimination, BS EN fifty four-23 compliant VADs could be installed in all sanitary accommodation (not simply WCs) and all resort bedrooms, pupil accommodation and similar https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/