Should the car's heating system use internal or external air circulation?
1 Answers
When using the car's heating system, it is advisable to alternate between internal and external air circulation depending on the situation. Introduction to internal and external air circulation in cars: Internal air circulation in a car refers to the recirculation of air within the cabin. In this mode, the airflow passage between the inside and outside of the vehicle is closed. Without the fan running, there is no airflow circulation. When the fan is on, the air drawn in comes solely from inside the vehicle, creating an internal airflow cycle. External air circulation mode uses the fan to draw air from outside the vehicle into the cabin, allowing air to flow between the exterior and interior. The air blown by the fan comes from outside, and while driving, fresh air is continuously drawn into the cabin, replenishing the interior with fresh air. Whether to use internal or external air circulation when using the car's heating system depends on the situation: When driving in congested urban areas, it is recommended to use internal air circulation with the heating system. On highways or during long-distance driving, using external air circulation with the heating system helps replenish fresh air inside the cabin, which is beneficial for the health of the passengers.
