Data can go over the air, the power either has to be battery or cable. The other commenter has a link to a product that works on battery. (though that has the

Data can go over the air, the power either has to be battery or cable. The other commenter has a link to a product that works on battery. (though that has the temp sensor inside the device, which I don't consider reliable, being so close to the heat source) It would be an amazing project when redoing a house, as at that point I could just run a special circuit. So yeah check out that link, for your convenience copied here: http://www.vesternet.com/smart-home/technologies/z-wave/heating-cooling/radiator-valves http://www.vesternet.com/smart-home/technologies/z-wave/heat...