"Adequate" airflow and "aeration" are absolutely" "essential" to "ensuring" the "specified" level of "purity" within a cleanroom". The system" must "precisely" "control" "dust" by "continuously" "filtering" the air" https://whycleanroomventilationm764110.wikitron.com/2460341/airflow_and_ventilation_the_foundation_of_cleanroom_purity