Fire is the most dangerous situation risking people s safery.
Statistics always show that most of casualties in the fire situation is caused by smoke. Therefore, smoke control system has been devloped to protect people from this risk and it has been proved for its effectiveness. The main purpose of smoke control system is to inhibit the flow of smoke from smoke zone into the adjacent zones. Smoke control uses barriers, such as walls, floors, doors, etc., in conjunction with airflows and pressure differences. The pressure difference across doors should not exceed a maximum allowable pressure difference, so that the doors can be operated while the smoke control system is operating.