"Adequate" airflow and "aeration" are "completely" critical" to "preserving" the "specified" level of "sterility" within a "sterile area". The "design" must "precisely" "regulate" "contaminants" by "repeatedly" https://cleanroom-ventilation-gu117713.iamthewiki.com/9819826/airflow_and_ventilation_the_foundation_of_cleanroom_purity