Should You Use Internal or External Air Circulation When Driving on the Highway in Winter?
1 Answers
When driving on the highway in winter, due to the long driving duration, keeping the internal air circulation on for an extended period without ventilation can lead to stale air inside the car. Therefore, it is advisable to switch to external air circulation to allow fresh air from outside to enter the vehicle. Alternating between internal and external air circulation helps maintain the interior temperature while ensuring fresh air, making the ride more comfortable. The internal air circulation in a car refers to the process where the air inside the vehicle is heated or cooled and then recirculated within the cabin. In this mode, the airflow passage between the inside and outside of the car is closed, and the air drawn in by the fan comes solely from inside the vehicle, creating an internal airflow cycle. Internal circulation effectively prevents external dust and harmful gases from entering the car and helps maintain the interior temperature. The external air circulation in a car refers to the process where outside air is heated or cooled and then brought into the cabin, facilitating gas exchange between the inside and outside of the vehicle. In this mode, the fan draws air from outside into the car, meaning the airflow channels connect the exterior and interior of the vehicle. The air blown by the fan comes from outside. Even if the fan is not turned on, the movement of the vehicle naturally draws in outside air, replenishing the cabin with fresh air.
