Fire alarms are divided into two technologies. Conventional and Analogue Addressable. Both systems normally consist of smoke or heat detectors being positioned around the building in volatile areas and deliberately operated devices in the shape of break glass call points in common areas and adjacent to entry or exit doors. Unlike intruder alarms, fire alarms do not have bell boxes outside but have fire bells inside the building. External fire bells maybe used if required.

Control Panels give indication of whether there is a fault of fire so that correct action can be taken. Fire alarms can also be connected to a signaling device to alert a Central Monitoring Station. All fire alarms are installed, maintained and certificated in accordance with British Standards 5839 and 6113.