Heating systems are not only complex, but also to some extent dangerous devices. But this refers primarily to those cases when the rules of their operation are violated. For example, one of the main conditions for the stable operation of the boiler is to carry out periodic cleaning of the heat exchanger. The fact is that over time, pollution occurs on its walls. Salt, iron elements and other pollutants can act as them. Settling on the surface of the heat exchanger, they significantly reduce its effectiveness. This means that you have to spend more fuel. At the same time, such a situation can lead to a real accident.