Visual Alarms: Use mild to signal emergencies, Specially productive in noisy configurations and for people with Listening to impairments. As a way to stay away from discrimination, BS EN 54-23 compliant VADs might be installed in all sanitary accommodation (not merely WCs) and all lodge bedrooms, college student accommodation and https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/