"Proper" airflow and "aeration" are "completely" critical" to "preserving" the desired" level of "sterility" within a cleanroom". The "design" must carefully" "control" particles" by constantly" "filtering" the air" https://cleanroomventilationguid722883.blogdigy.com/airflow-and-ventilation-the-foundation-of-cleanroom-purity-67700479