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