"Proper" airflow and ventilation" are "fundamentally" "essential" to "preserving" the desired" level of "purity" within a "controlled environment". The "design" must "precisely" manage" particles" by "continuously" https://theroleofairflowincleanr163834.wikiconversation.com/8205795/airflow_and_ventilation_the_foundation_of_cleanroom_purity