What is the primary purpose of a Smoke Control System?

• A. An engineered system that uses mechanical fans to produce airflows and pressure differences across barriers to limit smoke movement.
• B. A passive barrier without mechanical assistance.
• C. A system used solely for odor control.
• D. A fire suppression system that eliminates all smoke.

Answer: (A)

Smoke control systems are active, engineered means to influence how smoke moves in a building during a fire. They use mechanical fans, dampers, and a control system to create deliberate airflows and pressure differences across barriers such as doors and partitions. By supplying air to or exhausting air from protected spaces, these systems confine smoke to specific areas, keep egress routes like stairwells and corridors tenable, and improve visibility for occupants and responders. The goal isn’t to eliminate every bit of smoke, but to limit its spread and direct it away from people and exits, aiding evacuation and firefighting operations. A passive barrier without mechanical assistance doesn’t provide the dynamic control needed. Odor control is not the primary purpose, and a fire suppression system isn’t expected to remove all smoke.