Why are radiators made out of metal?

Metal is used to make radiators primarily because of its Excellent heat-conducting qualities. Due to their high thermal conductivity, metals like steel and aluminum can effectively transfer heat from the radiator's hot water or steam to the air around it. This guarantees the room's efficient heating. Metals are also strong and resistant to changes in pressure and temperature inside heating systems. Additionally, because of their malleability, radiators can be shaped into a variety of sizes and designs, giving them versatility in terms of installation and design.