There are 4 main lines, 2 inputs and 2 outputs, behind all models of our solid fuel floor heating stoves. Two of them are expansion tank flow and return, the other two are radiator flow and return. The line going to the expansion tank moves by constantly rising and the expansion tank should be located higher than the radiator located at the top of the system. A radiator, called a heat conversion radiator, is also connected to this line, so that the system goes and returns on this line in case of negative effects such as power cuts or circulation pump failure. This eliminates the possibility of the water boiling in the inner chamber of the stove and the explosion of the system.