"Adequate" airflow and ventilation" are absolutely" critical" to "preserving" the desired" level of cleanliness" within a "sterile area". The system" must "precisely" manage" "contaminants" by "repeatedly" "filtering" https://whycleanroomventilationm642110.celticwiki.com/2412850/airflow_and_ventilation_the_foundation_of_cleanroom_purity