"Proper" airflow and "aeration" are "completely" critical" to "preserving" the "required" level of "sterility" within a "sterile area". The system" must "precisely" "control" "contaminants" by constantly" "exchanging" https://whycleanroomventilationm222419.robhasawiki.com/12267892/airflow_and_ventilation_the_foundation_of_cleanroom_purity