Dust / Waste Handling Systems particularly applicable to the handling of cotton / lint  waste and associated trash created by machines in ginning plants. The system consists of a pneumatic  ducting circuit connecting a filteration unit  to all  factory locations where waste and dust is generated. A fan creates an air flow in the ducting circuit to carry waste and dust therealong. The fan  separates the air flow into major and minor portions and by centrifugal force transfers most of the waste and dust to the minor portion. The air in the major portion is directed back to the factory space via a filter  to remove any dust contained in the major portion