How long must alarm log books be retained after the last entry?

Alarm log books are crucial records that document the operation and responses of fire alarm systems. The retention period for these log books is typically set to ensure that there is a sufficient historical record for review, particularly for inspections, maintenance, and in case of investigations following incidents.

The correct duration for retaining alarm log books after the last entry is three years. This timeframe allows for thorough oversight; if any issues arise regarding the fire protection system's performance or compliance, the records can provide necessary information for safety evaluations and corrective actions. Retaining the logs for three years aligns with many regulatory and operational standards, ensuring that the documentation is accessible for an adequate period while not overburdening the facility with excessive old records that may no longer be necessary. This practice also helps to streamline maintenance schedules and uphold safety protocols.