Preferably, {HEAD ~ the temperature} of the air supplied to the first zone is {TAIL ~ 40°} to 80° C. below the air supplied to the following zone or zones 
Preferably , { HEAD ~ the temperature } of the air supplied to the first zone is { TAIL ~ 40 ° } to 80 ° C. below the air supplied to the following zone or zones
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH