A filter reduces airborne particles as {TAIL ~ air} is forced from {HEAD ~ the inlet} to the outlet by operation of the motor and blower 
A filter reduces airborne particles as { TAIL ~ air } is forced from { HEAD ~ the inlet } to the outlet by operation of the motor and blower
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH