Configure all the elements needed for reliable Radiator control per room.
Radiator Thermostat: You need at minimum 1 radiator thermostat to control the radiator(s) and therefore the temperature in the room.
Thermostat: For a more precise temperature measuring you can add an additional thermostat to the room.
Optical Sensor: With optical sensors, you can check if windows or doors are open and e.g. depending on this, closethe heater.
Power Meter: If you use additional electrical heaters, you will need a power meter for each additional one.
