As I am posting another Tread for advice on this setup you have probably read my previous treads.
I am going with a Trane XL15i system on an existing Rheem Oil Furnace.
I was under the impression that the XL15i is a single stage unit, however I am reading post's on the net saying that the HW VP IAQ will control the the humidity on this system better.
Does the IAQ need to talk to the blower in the furnace to control the humidity?
If not and there is communication between the IAQ and XL15i, since it is a single stage how can it control the humidity.
Maybe I am just missing something, but I can choose between the Trane 802 t-stat and IAQ, but for my setup I just thought the IAQ was an overkill for what I have.