"Proper" airflow and ventilation" are "fundamentally" "essential" to "ensuring" the "required" level of "purity" within a "controlled environment". The "design" must "precisely" manage" "contaminants" by "continuously" https://nonunidirectionalairflow979354.lotrlegendswiki.com/2434348/airflow_and_ventilation_the_foundation_of_cleanroom_purity