HI I have read all your posts. My intended setup would be a little different. I have one main living room that shoul allways remain working. No matter the state of my HA instance. (i can be away for long times).
But: The bathroom, twoo studies, and maybe another room i want to control separate. I want to use Zigbee TRV’s in those rooms. If HA is not working everything should work the old fashioned way. Just based on the living room temeperature. So when the HA setup is working properly the boiler should turn on and supply heat to at least one room that is requesting heat. If the Living Room is not requesting heat, the floor heating system should be closed. In ALL other situations the floor heating valve must be open.
Is this setup possible?