Four questions please about system I'm having installed:
(1) Condensor: Trane XR13 model #4TTR3048. There wasn't an "A" at the end of the model number on the proposal sheet, but had the "A" on the end on Trane's website. Is it the same with or without the "A" at the end?
(2) Evaporator Coil: Trane model #4TXFH054, slab coil. I couldn't find this on Trane's website, is it new or something?. And, does it have TXV?
(3) Furnace/Air Handler: Trane XR80, model #TUD1C100A9481A. The "1A" at the end wasn't on the proposal sheet, but it was on the end of the model number on Trane's site. Is this the same with or without the "1A" at the end?
(4) My 20 x 36 x 1 pleated filter arches up considerably when my current system is on and I think we're just using it with the new system. Is it supposed to arch up like that or is the air flow being restricted? Should I use the cheap blue filter instead?