I have multiple contractors etimates open (5 of them) and of course each one is a little different (RHEEM VS. PAYNE VS. LENNOX or 2 TON VS. 3TON). I have found one contractor that seems to be pretty honest and the only contractor that actually checked the outside condensing unit ( A 2001 Payne 2 ton) and found it to be just fine. He has reccommended to only replace the indoor furnace unit with a 3 Ton RHEEM SUPER QUIET 80. He has assured me that the outside unit has plenty of life left in it and would function fine with the new 3TON Furnace. He also pushed keeping the current system with the old refrigerant because he was not to excited about the new 410A yet and if we went up to the 3 ton we would have to run a new 3/8" refrigerant line (but thats a whole new issue). He wants to put the 3 TON in so that if we ever upgrade the condensing unit outside in the future, we could go up to 3 TON.
Southern California (90-110 Temps in summer)
1100 Sq. Ft that includes Large Vaulted ceilings
The three questions I have are:
1. One of the contractors included enlarging the duct box from 12" to 16" to accomidate the 3TON output of air, but with the contractor above, this was never mentioned. Should the box be enlarged for the new 3TON RHEEM FURNACE w/ the current 2TON PAYNE CONDENSER?
2. Is it cost effective and make sense to match up the new 3TON RHEEM with the existing and working 2TON PAYNE Condenser?
3. New refrigerant (410A) vs. current refrigerant?