Through an air inlet at the side of the chamber, air is drawn in induced by a ventilator like impeller rotor drawing {HEAD ~ air} in through {TAIL ~ a central opening} spaced apart from the bottom section  
in through
Through an air inlet at the side of the chamber , air is drawn in induced by a ventilator like impeller rotor drawing { HEAD ~ air } in through { TAIL ~ a central opening } spaced apart from the bottom section
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH