"Proper" airflow and ventilation" are "fundamentally" "vital" to "ensuring" the desired" level of "purity" within a "controlled environment". The "design" must "precisely" "control" "contaminants" by "continuously" https://the-role-of-airflow-in-c629098.wikipresses.com/7668804/airflow_and_ventilation_the_foundation_of_cleanroom_purity