Which characteristic is associated with an active smoke control system?

An active smoke control system is specifically designed to manage and mitigate smoke movement within a structure during a fire event. One of the key characteristics of such a system is pressurization, which involves creating areas of higher pressure to prevent smoke from spreading to certain areas, particularly escape routes such as stairwells. This is essential for maintaining visibility and ensuring safe egress for occupants.

Pressurization works by using fans to introduce air into specific areas, thereby pushing back smoke and keeping those areas safer for evacuation. This method is crucial in larger buildings or complexes where the potential for smoke spread is greater, allowing firefighters to effectively manage smoke movement and protect life safety during fire incidents.