An exhaust fan is configured to draw {HEAD ~ air} into {TAIL ~ the housing} through the evaporative medium pad and out the exhaust vent 
into
An exhaust fan is configured to draw { HEAD ~ air } into { TAIL ~ the housing } through the evaporative medium pad and out the exhaust vent
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH