I have two quotes to replace the HVAC unit in our attic. One vendor is recommending a York Affinity system that is a two-stage system.
Another vendor says the two-stage would be problematic for my situation because the outside unit is at basement level and the inside unit is in the attic, so close to 30' higher. That vendor is recommending a Trane XR13 with variable-speed unit upstairs, so a 14 SEER equivalent. He also mentioned issues with leaking coils and bad compressors with the York two-stage.
Seems like one of them is feeding us a line, but it is hard to figure out who.