"Proper" airflow and "exhaust" are "completely" "vital" to maintaining" the "required" level of "sterility" within a "sterile area". The "configuration" must carefully" "control" "contaminants" by "repeatedly" https://theroleofairflowincleanr529230.muzwiki.com/426285/airflow_and_ventilation_the_foundation_of_cleanroom_purity