I would like to improve our dry air issues. I have a humistate control on the second floor.. No idea what it runs-I am wondering if the furnace has a humidifier attached already. Initial look at furnace and controls makes me think there isn't a humidifier attached. If not where would I place it on a Trane xe 80 duro zone furnace and why in the world is there a humistate control on the second floor?