"Proper" airflow and ventilation" are absolutely" critical" to "ensuring" the desired" level of cleanliness" within a "sterile area". The system" must "precisely" "control" "contaminants" by constantly" "exchanging" https://unidirectional-airflow-c084942.bmswiki.com/6189132/airflow_and_ventilation_the_foundation_of_cleanroom_purity