At the moment the thermostat is near the front door and its a big old house and always cold in there. I would like the thermostat to be in one of the main sitting rooms where my grandma sits during the day so what I'm looking for is a way of me being able to check on the temp on my iPhone if I'm out and about (grandma and myself are the last in the family as my mother recently passed away). The problem is that it needs to have a connection (wireless, RF or Wifi. Sort of like a repeater) to where the existing one is. Hopefully that makes sense?