I work in apt industry. I came ac ross a loft unit with two thermistats, one downstairs that just controls the temp, and the other controls everything else. We dropped the hatch upstairs and it had two relays hooked up their was wires from both thermistats running to both of them. If you know anything about apts i would love to know how this should be hooked up so we get air and heat we have red and white from condinser, brown white green blue yellow red and orange on each thermistat wire please tell me how its supposed to function or if we can control evrything with one thermistat oh yea and it has a switch that says summer and winter