Thanks to all that helped educate me (beenthere..special thanks) about the issues regarding my zoned trane xl 16i...
I was finally able to get a response from trane...after I called the ceo's office. was directed to my regional distributor. They informed be that trane has a new zoning spec for the 16i that was just sent to my installer but they did tell me that the 16i was not recommended for zoning when I was sold my unit.
I forgot to ask for a copy of this spec...any ideas where I could find it..(i couldn't find it on the trane website