Radiators are heat exchangers used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The radiators are constructed to function in automobiles. The radiator is always a source of heat to its environment, although this may be for either the purpose of heating this environment, or for cooling the fluid or coolant supplied to it, as for engine cooling. Despite the name, most radiators transfer the bulk of their heat via convection instead of thermal radiation.

Plastic Aluminium means raditors with plastic inlet and outlet tanks with an aluminium core.