These equipment are usually installed in structures together with other constructions to alert occupants into the existence of a fire also to aid evacuation. It’s important that these sounders and Visible alarm equipment are prominently marked with “Fireplace ALARM” for apparent identification. Visible Alarms: Hire light to signal emergencies, Specifically https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/