Today, heating systems for private houses are no longer a rarity. As a rule, such systems have a higher efficiency than a classical heating plant, therefore, in most civilized countries, preference is given to it. The boiler itself can be placed directly in the house, so heat losses are minimal. And control over hot water supply in this case falls on the owner of the house. Of course, fireplace stoves are also capable of heating a room, but in the case of a boiler, we can talk about an even distribution of heat throughout the house. This is achieved by piping with radiators.
So, the boiler is the heart of the heating system. But it should be noted that boilers can be single-circuit and double-circuit. A contour means a spiral system with a coolant. Single-circuit boilers are used directly for space heating. In double-circuit boilers, there is the possibility of heating water for domestic needs. This should be taken into account when choosing. If there is a need for only one heating, one-circuit systems should be chosen, since they are more reliable and more convenient to use. An additional storage tank can be connected to a single-circuit boiler to create hot water reserves.
The choice of the boiler should be based on the area of the heated premises. Regardless of the choice, heating boilers must be equipped with a kit that includes an expansion tank, a pump, an air valve, thermostats, heating radiators, pipes and heating fluid. Yes, it can be not only water, special "antifreezes" are often used as a liquid.
Consider the operation of such heating. To start the system, it is necessary to remove all the air from it; for this, an air valve is used. When heating water in a boiler, the liquid flows into a gaseous state and increases in volume. As the pressure rises, so does the risk of pipe or boiler burst. This is where the expansion tank comes to the rescue, which is an additional space for the heated liquid. Then the water goes through the pipes and dissipates heat in the heating radiators. Naturally, the system would not work without liquid circulation, and one interesting feature should be noted here. Heating can work without a pump, due to the temperature difference at the inlet and outlet (hot water will tend to a colder area). However, in the case of a long pipeline and a branched system with many radiators, this feature does not work, so a pump must be used.
