
Honeywell RTH8580WF 7-Day Programmable Touch-screen Thermostat with Wi-Fi Capability: Discover the difference a smart thermostat can make for your everyday comfort and energy savings. Set different temperatures for up to 4 periods each day and even pause cycles while you're not at home.
A: Correct, just wifi and the app.
Q: Is this thermostat compatible with a propane gas furnace?
A: Yes, just not electric base board heaters, 24vac system
Q: Multi zone & twin home installation
A: On the Nest site you can input what kind of heating/cooling system you have and it would let you know if Nest is comparable or not. If it is, you need two Nest thermostats for 2 units or 4 for two units with 2 zones each (that if now each zone has its on thermostats, otherwise you would need only 2 Nest thermostats) , where two in one unit will connect to each other as one home 1, and two in the other unit as Home 2, they can be connected to the same network , but I think you should set them up as 2 pairs, 1 pair unit one, 1 pair unit 2, on the Nest app there is an option I think that lets you control two homes.