"Adequate" airflow and "exhaust" are "fundamentally" "essential" to "ensuring" the "specified" level of "purity" within a cleanroom". The "design" must "precisely" "control" "contaminants" by "continuously" "filtering" https://unidirectionalairflowcle403765.wikiinside.com/4182555/airflow_and_ventilation_the_foundation_of_cleanroom_purity