RT310RF : Testing the RF Transmissions (1.5.2) .
It is important to site both the receiver and thermostat in locations where the RF (Radio Frequency) signal cannot be interrupted. The receiving range between the thermostat and Receiver is approximately 30 metres indoors, however many factors can affect the RF transmission and shorten the operating distance, e.g. shielding by thick walls, foil backed plasterboard, metal objects such as filing cabinets, fridges or freezers, general RF interference, and so on. The range is generally large enough for most household applications, but it is advisable to test the RF transmission from the intended thermostat location to the Receiver location before fixing the thermostat to the wall.