"Proper" airflow and "aeration" are "fundamentally" "vital" to "preserving" the "specified" level of cleanliness" within a "sterile area". The system" must "precisely" "control" "contaminants" by constantly" https://nonunidirectionalairflow938657.wikijm.com/2399278/airflow_and_ventilation_the_foundation_of_cleanroom_purity