Which of the following is NOT part of an active fire protection system?

An active fire protection system is designed to take action when a fire is detected, actively working to suppress or extinguish a fire in progress. This includes systems that automatically activate or can be operated manually to control or eliminate fire hazards.

Fire sprinklers and fire extinguishers are quintessential examples of active fire protection. They both require some form of action, either automatic activation when a fire is detected (like sprinklers) or manual operation by an individual (like extinguishers). Smoke migration control systems also fall into this category as they often employ mechanical means or active measures to manage smoke movement, thereby aiding in fire control and occupant safety.

In contrast, physical barriers to the movement of flames or smoke are considered passive fire protection. These barriers, such as firewalls, fire doors, and smoke barriers, are designed to limit the spread of fire and smoke without the need for mechanical or human intervention. They remain effective as long as they maintain their integrity and do not require any action to perform their intended function. Hence, while crucial for overall fire safety, physical barriers do not constitute active fire protection.