Suitability with use of TRV's in multiple rooms?

aleks-mariusz commented 1 month ago

I have an Intergas boiler, and it is "opentherm-ready", so i am thinking of getting the opentherm-thermostat2 along with some TRV's but i'm struggling to figure out exactly how all these components work together (HA, temp-sensors in each room, TRVs in each room, and this thermostat for interfacing with the boiler) - are they even designed to work together?

HA i want to use for figuring out how to have each room be set (depending on time of day, day of week, etc)
the temp sensors will be the source-of-truth for each room (what the TRV's will rely on as well as HA's guidance of room suitability for heating (e.g. don't heat my office on weekends since i'm not in it, unless a presence sensor says i am)
the TRV's will actually open/close the flow of water to each radiator
the thermostat would have the control of the boiler to figure out if it can "relax" because room's don't need heating (based on what HA has)

What i'm very confused about is, there's a 'room temperature' setting for the thermostat. But i want each room to have its own set points, so i don't know how/if this can be accomplished with the thermostat2 (or if there's another device you'd suggest to achieve what i want). Can the room temperature be some value derived from the multiple thermometers i'll have in each room that has radiators?

I'm really struggling to figure out TRV's would affect the usage of this thermostat - essentially i just want the thermostat to function as a way to control the boiler, so it's not heating when it doesn't need to, and only heats the amount appropriate for the overall house's heating needs.

diyless commented 1 month ago

Hi @aleks-mariusz , You can build some HA scenario to calculate boiler setpoint based on temperature sensors. Switch DIYLESS Thermostat to manual mode via HA and MQTT and set calculated boiler setpoint. You can find related MQTT topics here https://diyless.com/blog/opentherm-thermostat-cfg-overview

Best regards, DIYLESS

diyless commented 1 day ago

@aleks-mariusz were you able to figure that task out?

diyless / opentherm-thermostat2

Suitability with use of TRV's in multiple rooms? #2