{TAIL ~ The purified air} is returned to {HEAD ~ the indoor institution} after moisture removal, ozone elimination and temperature adjustment 
{ TAIL ~ The purified air } is returned to { HEAD ~ the indoor institution } after moisture removal , ozone elimination and temperature adjustment
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH