Following this thread with interest. Looking at changing energy providers and interested in getting more into IoT sort of gadgets. I currently have a bum-basic home gas central heating setup. Mechanical timer on the wall under the boiler and TRVs on the rads.
What's involved in a Nest install usually? The stat can go anywhere I presume. I don't know if my current CH setup is zoned upstairs/downstairs or if the CH can be separate from the HW. How many Nest controlled valves are part of a standard install?