"Proper" airflow and "aeration" are "fundamentally" critical" to "ensuring" the desired" level of cleanliness" within a cleanroom". The "design" must "precisely" manage" particles" by "repeatedly" "exchanging" the air" https://cecilyulyh079209.blogdigy.com/airflow-and-ventilation-the-foundation-of-cleanroom-purity-67168572