In fact, this is a simple tank, which is connected by a special spiral, through which the coolant is located in the heating system. Due to this, the fluid is heated in the tank. Moreover, this system is considered quite effective, since, in comparison with other devices, the volume of heated water is large, and there is little electric energy. At leisure it will not be superfluous to find out more about the site ?P = 2811 and its services.