"Adequate" airflow and ventilation" are "completely" "essential" to "ensuring" the "required" level of "sterility" within a cleanroom". The system" must "precisely" manage" "contaminants" by "repeatedly" "filtering" https://why-cleanroom-ventilatio631269.magicianwiki.com/2300651/airflow_and_ventilation_the_foundation_of_cleanroom_purity