CAN ANYBODY TELL ME THE DIFFRENCE BETWEEN THE TWO AS SUPPLIED BY FLS IN A GRATE COOLER. WHAT IS THE BENIFIT FROM CONVENTIONAL TO CIS MFR RFT & THAN WHAT IS THE GAIN FROM CIS TO CFG ? IS THE COOLING AIR REQUIREMENT IS SAME FOR BOTH OR DIFFRENT & WHY? IS IT BETTER TO GO FOR CFG IF WHR IS IN OPERARTION WITH COOLER? RAJ