"Proper" airflow and "exhaust" are absolutely" "vital" to "preserving" the "specified" level of "sterility" within a "sterile area". The "design" must "precisely" "regulate" "contaminants" by constantly" "exchanging" the "environment" and removing" "released" "pollutants". This process" relies on a "deliberate" "ratio" of "incoming" and "outlet" ai