"Adequate" airflow and ventilation" are "completely" "vital" to "preserving" the "specified" level of "purity" within a "controlled environment". The "configuration" must "precisely" "control" "dust" by "continuously" https://unidirectionalairflowcle201421.wikicommunications.com/7760986/airflow_and_ventilation_the_foundation_of_cleanroom_purity