"Effective" airflow and "exhaust" are "fundamentally" "vital" to maintaining" the "required" level of "purity" within a "sterile area". The system" must carefully" "control" "dust" by "continuously" replacing" the air" https://unidirectionalairflowcle297616.wikidank.com/2380976/airflow_and_ventilation_the_foundation_of_cleanroom_purity