What category of appliances do horns, bells, and chimes fall under in fire alarm systems?

Horns, bells, and chimes are categorized as notification appliances in fire alarm systems. Their primary function is to alert occupants of a building to evacuate or take action in response to a fire or other emergency situation. These devices produce audible signals that are essential for ensuring that individuals are made aware of potential dangers, allowing them to respond quickly and effectively.

The notification category encompasses any device designed to convey an alarm to individuals present in the area, making it crucial for emergency communication. This is distinct from detection appliances, which are responsible for identifying the presence of smoke, heat, or other indicators of fire, and control devices, which manage the system’s operations and responses. Battery, while important for powering devices, does not fall into a category that directly relates to the functionality of alarm systems as it merely supports the operation of these devices rather than providing a specific function in alerting or notifying.