Heater cores are a critical component of a vehicle's HVAC system, responsible for providing warmth to the passenger compartment. Located inside the vehicle's dashboard, the heater core receives hot engine coolant and uses a fan to blow air across its fins, generating heat for cabin comfort. These units are constructed with high thermal conductivity materials to maximize heat transfer while resisting corrosion from prolonged exposure to coolant. Proper heater core function is essential for defogging windshields and maintaining comfortable temperatures in cold weather. Examples in our catalog include heater cores for MAN vehicles, such as part number 81619016191, 83.77901-6540, and 88.77903-6254.