The grain dryer 10 further includes a heating unit 40 which is operable to draw ambient air from the environment, heat the ambient air, and advance {HEAD ~ the heated air} into {TAIL ~ the plenum chamber} 28 
into
The grain dryer 10 further includes a heating unit 40 which is operable to draw ambient air from the environment , heat the ambient air , and advance { HEAD ~ the heated air } into { TAIL ~ the plenum chamber } 28
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH