Looking at this Nest question reminded me that I'd really want one of these for my future house. The Nest website says that it's currently only available in the US but I'm wondering whether that is just a sales/marketing choice of if there might be technical reasons for the US limitation.
The Nest website has a widget where you can tick what cables you've got and it then tells you whether the Nest will work with that. I'm not sure that these cable markings/colors are international though. I would get a Vaillant gas heater very similar to this one.
At $250 it's just expensive enough that I hesitate to just order one and try if it works. Even if I did, I would also be afraid of damaging it by connecting the wires wrong.
- Do the markings/colors on cables of gas heaters/thermostats follow an international standard?
- Can I expect that a Nest would work in Europe, when connected to a European brand model?