We are having an extension done and intend on having all underfloor heating in the new area. Currently we have a valiant combi boiler supplying the main house which has been T'd off with a valve for the underfloor heating when we are ready to install its manifold. I wanted to install a Nest thermostat for the main house and a second Nest to control the underfloor heating. Given the size of the room (50 square metres) I've been told it splitting it into 3 zones would be best. I'm not quite sure how that will work with the Nest, as their support desk mentioned that 1 nest can only control 1 zone. Is what I want achievable ? And if so, how would it be hooked up? I.e what do I need to do at this stage.