A thermostat is a very useful and small-sized electronic instrument. Thermostats are concerned to detect the house temperature is smaller, higher or equal compared to one of the eventual devices switched on as radiators. Thermostats are put in a quite neutral area of the house, where we do not feel enough heating of the radiators in order to avoid that it may be affected in its capacity. That’s why it's recommended to install it away from eventual heat sources, such as lights, or eventual cooling sources. Choosing the position, where installing the thermostat, is a very sensitive operation, which determines the right functioning of the instrument chosen for our house.