The Passiv Smart Thermostat will work if your radiators are fitted with TRVs. However, if the TRVs are set too low, this can limit the flow of hot water around the system and reduce overall heat pump efficiency. We recommend setting each of your TRVs to the maximum possible setting and letting the Passiv Smart Thermostat's control algorithms provide the necessary heating to reach your target temperatures.
Please note that the Passiv Smart Thermostat is not compatible with smart TRVs that are connected to a wider control system. This will interfere with the Passiv Smart Thermostat's thermal models and prevent your heat pump from efficiently heating your home.