Air flow ridgevent coupled with ridge louver plate ventilation produces a pathway for continuous airflow along the entire underside of the roof. Airflow is maintained in two ways. First, hot air naturally rises and exits out of the ridge louver plate vent, pulling in cool air from below. Second, positive airflow across the ridge of the factory building creates a “venturi effect”, or a negative pressure, which pulls air out of the ridge louver plate vent and brings in cool air from the opening below.