During the use of the system, the water in the tank of the drive is not so actively used in the tank. It is defended, and there are also numerous pollution in it. Cleaning this water is one of the main tasks. In addition to the cooling system, such heat exchangers are successfully used for heat supply. The order of work is similar, only instead of the cooling system the heat pumps are used. They also do not like contaminated water, and in the case of it in the systems, expensive repairs will be required.