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