The RGFD090EZCM would push 1200 cfm to 2000 cfm (3 to 5 tons). the letter M would be for the smaller furnaces RGFD06,RGFD07 = 600 cfm to 1200 cfm (1.5 to 3 tons).
RANL condensers dont make a 3 1/2 tons condenser. 1 ton encrements only (2 ton,3,4,5) A load calculation is very important to have done when makeing this kind of purchase and then select condenser that will work best for you according to the NET SENSIBLE LOAD. The total SENSIBLE should be matched to the 2nd stage compressor and coil select. With out the load calculation we cant correctly match condenser /coil.A Guess at the size is not good enough.

HEY VEESUBOTEE,

YOUR FURNACE IS GOOD FOR YOUR AC, EXCELLENT PICK.
COOLMEN IS WRONG ON THE 3 1/2 TON AC. IT IS AVAILABLE.( THE RARL AC UNITS ARE 2,3,4,&5 TON ONLY)
RANLO42JAZ ( 31/2 TON HEAT PUMP) IS MATCHED WITH A CASED COIL WITH MODEL# OF RCFLHM4821AC YOU WILL RECEIVE 14 SEER ON AC WITH THIS MATCH UP. THE ECM MOTOR IMPROVES THE EFFICINCY TO RAISE THE SEER. YOU QUALIFY FOR A $50.00 TAX CREDIT FOR THE FURNACE. MAKE SURE THEY HAVE A GOOD PROGRAMMABLE T-STAT FOR YOUR MODULATING CAPABILITIES.

Here is a link that might be useful: ACCA AND ASHRAE CERTIFIED HEATING & AIR CONDITIONING LOAD CALCULATIONS AND DUCT DESIGNS

My mistake on the model, I was thinking RARL. thanks for correcting me pearson21

The RGFD-09 is a 21" wide furnace so the proper coil would be the RCFL-HM4821.

ARI reference # 683902
RGFD09EZCMS
RANL042JAZ
RCFLHM4821AC