The condenser is the other heat exchanger in a mobile A/C system. Nowadays, condensers are usually made of aluminum, but in the past, some were made of copper/brass. Condensers look very much like radiators, just a little thinner, and since they also depend on air flowing through them, are usually located in front of the radiator.

Like radiators and evaporators, condensers are also constructed as a series of fins around them. But unlike an evaporator, whose job is to absorb heat, the condenser's job is to release heat. More specifically, to release the heat the refrigerant absorbed while it was flowing thru the evaporator, very much the same way the radiator releases the heat from engine coolant that the coolant absorbed whole it was flowing through the engine. The refrigerant enters the condenser as a high pressure vapor, but as it flows through the condenser and cools, it turns back into a cooler high pressure liquid.