Should You Use Internal or External Air Circulation When Driving on the Highway?

[DiLiam]

You should use external air circulation when driving on the highway. Here are some considerations for using internal and external air circulation on the highway: 1. During long drives on the highway, it is advisable to slightly open the windows or turn on the external air circulation to maintain fresh air inside the vehicle and prevent dizziness caused by lack of oxygen. Do not close the windows or turn off the external air circulation when sleeping in the car. 2. The choice between internal and external air circulation on the highway depends on the season and weather conditions. When the weather is comfortably cool, you can use external air circulation; when it is hot, avoid using external air circulation. 3. On rainy days, turn on the internal air circulation and also activate the defogging function to prevent fog from obstructing your vision.