It is located between the platform, where fan group is located , and water distribution system inside of tower. Its duty it preventing the water particles, which split up molecules in water distribution system, from being thrown to atmosphere by drifting with absorbed air. It is assembled within tower as modular cassettes. Cassettes are assembled without empty space and covering all tower section. It is produced at the optimum height for having high drift elimination ability and low pressure fall. Profiles are arranged at regular intervals. Intervals are obtained from PP via finished intermediate elements.