Palohälyn

Palohälyn (Finnish for fire alarm) is a system designed to detect fires and alert building occupants and authorities to enable safe evacuation and prompt response. It typically comprises detectors (such as smoke, heat, or flame detectors), manual call points, a fire alarm control panel, and notification appliances like audible horns and visual strobes. In many buildings, the system is integrated with automatic suppression or building management systems.

Detectors monitor for signs of combustion or elevated heat and trigger the control panel when thresholds are exceeded. The control panel processes signals, activates alarms, and can relay alerts to security staff or emergency services. Manual call points allow occupants to initiate alarms manually. Notification devices are distributed to ensure effective warning throughout the premises.

There are different system configurations, including conventional and addressable fire alarm systems. Conventional systems group detectors into zones, while addressable systems identify the exact detector that has triggered the alarm. Fire alarms are typically powered from the building’s mains electricity with battery backup; some installations also use wireless components for added flexibility.

Standards and maintenance: In Europe, fire alarm systems generally conform to EN 54 standards, covering detectors, control panels, power supplies, and notification devices. Regular inspections, testing, and certification by qualified technicians are required to maintain functionality and reliability.

Impact and use: Palohälyn is widely used in residential, commercial, and industrial buildings and is essential for safe evacuation and automatic fire response. It complements other fire safety measures such as detection, suppression, and emergency planning.