Thermostatic valves are installed close to the radiators in order to adjust the hot water flow. The functioning of these valves is pretty easy and depends on the level set. Thanks to the sensors, the water flow towards the radiator increases or decreases, and mechanism allow adjusting the temperature of the surrounding avoiding waste and heat losses. On the valve handle for the radiators, there are five positions which correspond to various degrees of temperature, from the highest to the lowest. These valves are automatic, so there isn’t the chance to install them near the oldest radiators which instead require manual valves.