A lesser-known solution is a reclamation from sewage. The principle is quite simple – wastewater heat is used to heat water. Before the wastewater gives off heat, it needs to pass through various types of filters that separate impurities.

For the system to work effectively, an accumulation tank is installed, because the flow of wastewater does not always coincide with the amount of water required. If water is not needed at a particular moment, for example during the night hours, it is stored.

Heat recovery from sewers is most useful for buildings with a lot of hot water use, pools and showers, laundries and dry cleaners, the textile industry, food factories, residential homes, etc.