Used with one burner of a dual burner grill, the wall confines the hot gases and {HEAD ~ radiant energy} to {TAIL ~ half} of the grate to conserve fuel 
to
Used with one burner of a dual burner grill , the wall confines the hot gases and { HEAD ~ radiant energy } to { TAIL ~ half } of the grate to conserve fuel
OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH