Recuperators with water heater

Water afterheater

— an afterheater receives heat from a liquid heat exchanger through which hot water or another heat carrier circulates — usually from a common heating system. In such installations, electricity is consumed only for the operation of fans, and the energy consumption is rather low, while the heating power can reach tens of kilowatts. In operation, such a heater is cheaper than an electric one, especially if the heating system is built on a gas or solid fuel boiler. At the same time, such models are much more difficult to connect, and their efficiency directly depends on the temperature of the coolant. Because of this, water heaters are quite rare; they are preferred to be used where, for one reason or another, the use of electric heating is impossible or unjustified.