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

1 Answers
MacHannah
07/30/25 7:08am
Run the external air circulation on the highway. The reasons for using external air circulation on the highway are as follows: 1. Highway: When driving on the highway, the windows are all closed, and the air inside the vehicle cannot circulate. Turning on the external air circulation allows outside air to enter the vehicle, improving the freshness of the air inside. 2. Air Conditioning: External air circulation has little effect on the performance of the air conditioning while driving at high speeds. Using external air circulation during daily air conditioning use will reduce its effectiveness. 3. Windshield: Fogging on the windshield is mainly due to excessive humidity inside the vehicle. Turning on the external air circulation can continuously replenish fresh air, maintaining moderate humidity inside the vehicle and making it less prone to fogging.
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