Cold radiators, noise during the work, corrosion of metal elements are the most frequent problems at operation of heating systems. The air which got to system is guilty of it. Therefore, it needs to be removed. Even ideally designed and executed system of a central heating needs periodic drain of air. The air which is in system is a consequence not only possible leakage. There is a lot of reasons of availability of air in system of a central heating.
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Service of systems of a central heating
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