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