The air-conditioning engineering branch and freezing in the mechanical engineering department in specialized lecture entitled (How to choose a driving air cooling systems) under the supervision of Dr. Luay Abdul Aziz cooling enhancing substance technology equipment for students of the branch - the fourth stage as the representative of the company to conduct the process of selecting a computerized air driving, as during the lecture discuss the basic structure of the systems driving the air and discuss the full details of the subject in terms of electric motors used and ranges manufacturers have the ability and the ranges of operational work and life have also touched on types of filters used in the system and the scientific foundations that are selected on the basis of which the fans and how far back in history to avoid noise formed as a result of their work.