One bidders is proposing a Trane XC95m furnace and an XL15i AC; 3.5 ton and matching coil. Another is proposing a Lennox XC14 AC and G61V Gas Furnace. The second suggested when I asked for a comparison that the only difference is that the g61v has a 2 stg gas valve and the xc95 has a modulating gas valve. The ac's have the same SEER rating. However the XC95 and XL15i are not compatible w/ one another. The proper matchup would be an XL16c but I would not recommend that matchup because a 2 stg compressor in a non-zoned 2 story application is a comfort problem waiting to happen. I currently have a York 3.5T AC and Diamond Furnace. The AC isn't worth repairing; however, I'm leaning towards replacing both.
Is it true that the XC95m and XL15i are not compatible?