"Proper" airflow and "exhaust" are "completely" "vital" to maintaining" the "required" level of "sterility" within a "sterile area". The system" must "meticulously" "regulate" "contaminants" by constantly" "filtering" https://unidirectionalairflowcle403765.wikiinside.com/4182555/airflow_and_ventilation_the_foundation_of_cleanroom_purity