adjusting the flow of air through at least another airflow control device based on {HEAD ~ the concentration} of {TAIL ~ carbon dioxide} flowing through the at least one airflow control device 
of
adjusting the flow of air through at least another airflow control device based on { HEAD ~ the concentration } of { TAIL ~ carbon dioxide } flowing through the at least one airflow control device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH