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In zones with multiple Radiator Valves or a Radiator Valve and a Room Sensor it is possible that both devices may not read the same temperature. This occurs as the Room Sensor is placed in a sensible location (e.g. chest height on an internal wall) whereas the Radiator Valve is likely to be near the floor, under a window or behind some furniture. If the Radiator Valve is misreading the temeprature temperature then it can be adjusted using this hidden offset.
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