Köhler

Kühler is a German noun meaning "cooler" or "radiator." In technical use it denotes a device that removes heat from a liquid or gas to prevent overheating. The word can also appear as part of compound nouns such as Wasserkühler (water radiator) or Luftkühler (air cooler). In German, the adjective kühl has the comparative form kühler, meaning "cooler."

An automobile Kühler, or radiator, is a heat exchanger in the engine cooling system. It transfers heat from the engine coolant to the ambient air, typically via a core of tubes and fins and with airflow provided by a forward-mounted grille and cooling fan. Modern radiators are usually made of aluminum or brass; older designs used copper. The radiator works in concert with components such as the water pump, thermostat, radiator cap, and hoses to regulate engine temperature and prevent overheating.

Besides automotive use, Kühler denotes other cooling devices in industry and consumer equipment, such as heat exchangers, liquid coolers for electronics, or cooling units used in manufacturing processes and climate control. In these contexts the term often describes equipment designed to remove heat from a circulating fluid or a component to improve performance or safety.

Translation and usage: In English, Kühler is translated as radiator or cooler depending on context. In engineering and automotive contexts, it most often refers to the vehicle radiator, the heat exchanger that dissipates engine heat. The term can also appear in broader German discussions of cooling hardware or thermal management systems.