A blower unit is connected to {TAIL ~ the motor} to draw air from the inlet to {HEAD ~ the outlet} 
A blower unit is connected to { TAIL ~ the motor } to draw air from the inlet to { HEAD ~ the outlet }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD