Guides and advice

BS 5839-1

Practical guides on fire alarms, extinguishers, emergency lighting and UK fire safety rules, written for installers, contractors and building managers.

Apollo Orbis A1R heat detector
BS 5839-1

Heat Detectors Explained: EN 54-5 Classes, Rate-of-Rise & Siting

Heat detectors alarm on a set temperature or a fast rise in temperature. This guide explains EN 54-5 classes such as A1R and CS, heat vs smoke detection, and BS 5839-1 spacing and ceiling heights.

5 min readRead →

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Red resettable manual call point used for weekly fire alarm testing

Weekly Fire Alarm Testing & Log Book Guide (BS 5839-1)

BS 5839-1JEM Systems UK