What is the function of a fire alarm system?

The function of a fire alarm system is primarily to detect the presence of smoke or heat during a fire emergency and to alert occupants of the building. This early detection is crucial for ensuring the safety of individuals by providing them with a warning to evacuate the premises in a timely manner. The system typically includes various sensors, alarms, and notification devices that work together to monitor the environment and respond to fire conditions.

While other options address important aspects of fire safety, they do not encompass the main purpose of a fire alarm system. A visual warning system may complement the auditory alerts but is not the core function of a fire alarm. Sprinkler systems are designed to suppress or extinguish fires rather than alert occupants, and monitoring fire extinguishers is a separate responsibility, crucial for fire safety maintenance but not directly related to the primary function of a fire alarm system. Thus, the detection of smoke or heat and alerting occupants is the essential role that a fire alarm system plays in fire safety protocols.