"Effective" airflow and ventilation" are "completely" "vital" to "ensuring" the "required" level of "purity" within a "sterile area". The "design" must "precisely" manage" "dust" by "repeatedly" "exchanging" the air" https://unidirectionalairflowcle005710.shivawiki.com/8348556/airflow_and_ventilation_the_foundation_of_cleanroom_purity