What is the purpose of the firefighter's key in an elevator?

The firefighter's key, also known as the fire service key, serves a critical role in emergency situations. Its primary purpose is to allow firefighters to take control of the elevator system during emergencies, such as fires or other crises. By using this key, firefighters can bypass normal elevator controls, which may be compromised or pose a risk to safety. This enables them to either recall the elevator to a designated floor for easier access or to ensure the elevator does not stop at floors where there is danger, effectively providing a safe means of transport for them and any occupants needing assistance.

This functionality is vital for ensuring safety during fire emergencies, as elevators can be unsafe to use under certain conditions, such as smoke or flame presence on floors. The firefighters can also directly control the elevator to ensure it is used optimally during rescue operations.