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Nef
I got a forum approved gas engineer to come round and work out what is going on with my heating as it didn't really make sense. Turns out I have two zones, UFH in the kitchen and the other is the Rads, both have their own wireless stat controlling a diverter valve and the boiler. BUT, there is a 3rd 'zone' that feeds the rads in the loft conversion, however it just tees off before either of the diverter valves meaning that those rads come one when either roomstat is calling for heat. Genius! I can 'fix' it with a two zone Tado system, with the rogue radiators controlled by their own tado smart radiator valves.
I have spoken to Tado and they say I can replace the wireless stats with 1 x Starter Kit - Wireless Smart Thermostat and the other one with 1 x Add-on - Wired Smart Thermostat however I'm not sure I can run cables from the boiler to a suitable place for a wired stat to go. Tado can't run with two wireless controllers apparently.
Are there any magic tricks to running cables without taking up floorboards etc? Both diverter valves are in the kitchen where I want the wired stat to be and are directly wired to the boiler. But the boiler is in the bathroom, one floor up in and the diagonally opposite corner. The bathroom floor is entirely tiled with slate on top of the original floorboards and joists (I assume) and the kitchen has been extended (side return) so the ceiling if fully plastered barring a few spotlights and there are steels in there somewhere as well.