I just bought a new 3611 Cyclone (my second Cyclone to own) and it came with Two AC units. Since I live in Texas I really need three. My breaker box has a breaker for a 3rd Ac so I called Heartland and talked to a service rep. He told me that that breaker was mislabeled and if you didn't order three AC`s they weren't wired for them. he doesn't know what he I talking about. I looked at a new one with three Ac`s and noticed that the thermostat was mounted outside the bathroom door so I pulled the trim loose and took a pocket knife and popped the paneling loose from a couple of staples and looked in there is the thermostat wire. drilled a hole next to the stud and an the wire out and took paneling nails an nail the paneling back. Camping World has the Dometic 15K Ac units for less than a thousand and the service manager old me they would install t for $200. one more thing you will have to put the energy management control on to keep all therefrom starting at the same time.