heater core(A heater core is a radiator-like device used in heating the cabin of a vehicle. Hot coolant from the vehicle's engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air. Fins attached to the core tubes serve to increase surface area for heat transfer to air that is forced past them by a fan, thereby heating the passenger compartment.: Радиатор отопителя — это обычный теплообменник, который обеспечивает передачу тепла от теплоносителя к окружающему воздуху. • The heater core's job is similar to the radiator, it circulates the coolant through various tubes and parts.wikipedia.org)
