It is believed that the efficiency of the boiler largely depends on the area of the heat exchanger, the larger it is, the more effective the return of heat. In this regard, cast -iron heat exchangers are clearly superior to steel.
It is believed that the efficiency of the boiler largely depends on the area of the heat exchanger, the larger it is, the more effective the return of heat. In this regard, cast -iron heat exchangers are clearly superior to steel.