Buying correct Tado system for our setup
We currently have a two zone (upstairs and downstairs) system with wired thermostats in each zone and basic TRVs in each room except the ones with the thermostats. At the boiler end we have, I think, two mechanical zone switches wired to an Ideal Logic Combi ESP1 35. The issue I have is that the bedroom with the upstairs thermostat gets warm quickly meaning that the heating cuts off and the other bedrooms are freezing. So my plan is to install smart TRVs to every radiator and then also get a smart thermostat so that the cold bedrooms can override and keep the heating on until they are warm enough.
So according to Tado shop I need a wired starter kit and another wired add on thermostat, plus the smart TRVs. However, I think I would be better off overriding the two zone system and just having one zone with each room being controlled individually by the smart TRV. So does anyone know if I can just manually override the each mechanical zone (so they are constantly calling for heat) and then buy one thermostat and wire this directly into the OpenTherm terminal on the boiler to actually control the boiler? If so, do I want a wired thermostat (?) as I assume that the current thermostats are wired directly into the mechanical zones rather than the boiler? Am I better getting a wireless thermostat and wiring this into the boiler and then just covering up the existing thermostats?
Hope that makes sense!