"Proper" airflow and "aeration" are absolutely" "vital" to "preserving" the desired" level of cleanliness" within a "sterile area". The system" must carefully" "regulate" particles" by "repeatedly" "filtering" the air" https://the-role-of-airflow-in-c136398.snack-blog.com/42088214/airflow-and-ventilation-the-foundation-of-cleanroom-purity