"Proper" airflow and ventilation" are "completely" critical" to "ensuring" the desired" level of cleanliness" within a "sterile area". The system" must carefully" "regulate" "dust" by "repeatedly" replacing" the air" https://theroleofairflowincleanr462186.blogdal.com/42284555/airflow-and-ventilation-the-foundation-of-cleanroom-purity