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