The thermostatic head screws on in place of the old manual valve and then regulates the radiator's heat to a schedule by itself. Sonoff TRVZB and Avatto TRV06, TRV07, TRV10 and TRV16 work over Zigbee, and the IMOU kit includes a gateway; the Shelly BLU TRV talks over Bluetooth and the Meross MTS150 works with HomeKit. Some kits include adapters for different valve threads — check which thread your radiator has.
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The thermostatic head screws on in place of the old manual valve and then regulates the radiator's heat to a schedule by itself. Sonoff TRVZB and Avatto TRV06, TRV07, TRV10 and TRV16 work over Zigbee, and the IMOU kit includes a gateway; the Shelly BLU TRV talks over Bluetooth and the Meross MTS150 works with HomeKit. Some kits include adapters for different valve threads — check which thread your radiator has.