My house is heated with baseboard hot water heat from an oil boiler (now wood burner) with 3 zones. I also have AC that was added in the attic recently (right before we bought the house). On the upper level of the house is where the bedrooms are, with the heat thermostat in the master bedroom. The AC thermostat for the entire house is in the hallway right outside the master. I would like to combine the 2 thermostats into one. Wiring isn't a problem, as I can run the heating wire start through the wall.
I understand the Rh and RC being the red from each source, however my confusion is what do I do with the white wires? Hook both into the thermostat, or just pick one and use that?
I don't have a need for the C wire yet, but I plan to go with a wifi thermostat in the future. Can I pull power from the red wire from my boiler to power the C on the thermostat?