In another embodiment, the air is drawn into the intake housing primarily from {HEAD ~ an area} above {TAIL ~ one or both sides} of the grain bin extension 
above
In another embodiment , the air is drawn into the intake housing primarily from { HEAD ~ an area } above { TAIL ~ one or both sides } of the grain bin extension
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH