Industrial Grade Metal Louver is designed to provide water resistance against all weather conditions with innovative baffles which help in minimizing rainwater and dust penetration while maximizing natural air-flow. The Louver has rainproof design that minimizes space required for fans and other ventilation equipment. The Louver acts to actively filter water from air. The Industrial Grade Metal Louver has the feature that the air passage is designed to move water droplets to the louver surfaces, where they are drained and the design traps the water droplets on the louver blades without blocking airflow.