Relay modules (1/4/6 channel)
Now, if we vant to create heating zones (with a pump or Underfloor heating manifold), it need a wired thermostat each zone and same number of wireless temperature sensor. It really expensive and we need buy a device that we not use 90% of it abilities... (wired thermostat, we use it a simple relay mode, not measue temperature, or not control boiler via advenced bus system) The biggest problem that one wired thermostat only control one zone.
So if we have a 12 channel Underfloor heating manifold and we are cretate 4 zones (of course we are combine some of connected Electrothermal Actuators ) that need 4 wired thermostat and same number of wireless temperature sensor. (or wire the thermostats to the correct place, but it not really possible most of cases)
It would be good that Tado create a (relatively) cheap device (or devices) that only contain relays (1/4/6 for example) and possible to control (each relay separately) with a remote temperature sensor(s).