It is 36000 BTU / 12000 (1 ton) = 3.0 ton
The SEER is 10 (http://www.ehow.com/how_7590098_do-number-tseries-air-conditioner.html )
trane air handler tonnage for model BWV760P100A1
I would prefer Trane of the 3 you listed. But that`s just me.
Trane Furnace model TUD080R9V4K4 what is the warranty and how long is the warranty
2006
3 ton.
5 ton
5 ton
Two tons
10 ton
30