"Effective" airflow and "exhaust" are "completely" critical" to "ensuring" the desired" level of "sterility" within a "sterile area". The "design" must "precisely" "regulate" "dust" by constantly" replacing" the air" https://the-role-of-airflow-in-c327929.wikiexcerpt.com/4587891/airflow_and_ventilation_the_foundation_of_cleanroom_purity