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

The appropriate retention period for the alarm log book after the last entry is three years. This requirement is in line with regulations that necessitate maintaining records related to fire safety and alarm systems for a specific duration to ensure accountability and facilitate inspections by relevant authorities. Retaining the log book for three years allows for a comprehensive history of alarm events that can be reviewed in the case of incidents, compliance audits, or investigations, ensuring that all actions taken in response to alarm situations are documented and readily available for assessment. This period strikes a balance between retaining necessary information for safety and operational effectiveness while managing record-keeping requirements.