Is it better to use internal or external air circulation in winter?

1 Answers
KeeganRose
07/30/25 6:41am
Regarding whether it is better to use external or internal air circulation in winter, the following points are explained: Use external air circulation whenever possible. In winter, the outside is cold while the inside is warm, and using internal circulation can cause the windows to fog up and make the driver drowsy. Unless the outside air quality is really poor, avoid using internal circulation. Disadvantages of using internal circulation in winter: Some drivers never open their windows and immediately turn on the internal air circulation when they get in the car, claiming that dust will enter and affect the interior environment. This approach is not advisable. Before driving, it is generally recommended to open the doors to exchange air, especially in winter. Prolonged use of internal air circulation with the air conditioning on can lead to oxygen deprivation in the driver's brain, causing dizziness and impairing judgment, which affects driving safety.
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