Choose only such thermostats that are guaranteed to work in your house. You do not want to end up having something that is not going to work in your case. Look at a YTHX9321R1011 thermostat and see how you can use it in your home. A good example of thermostats are Honeywell thermostats such as Honeywell th8320u or Honeywell th8321u. Of course, there are many other models worth talking about. It would be difficult for me to talk about all of them in this post. It would be best if you had a chance to check them out on your own. It would be a lot easier that way.