What type of devices are required to be included when a visible notification device is present, as per NFPA 72?

When a visible notification device is present, it is essential to include fire alarm systems as per NFPA 72. This requirement is rooted in the need for comprehensive emergency communication. Fire alarm systems are designed to detect fire and notify occupants of an emergency through alarms and alerts, which are crucial for ensuring safety in the event of a fire. The integration of fire alarm systems with visible notification devices enhances the effectiveness of safety measures, especially for individuals with hearing impairments who may not respond to audible alarms alone. By incorporating fire alarm systems, the safety framework is strengthened, ensuring that all individuals are adequately warned of a potential threat, thus enabling appropriate response actions.