Is it okay to keep the external air circulation on while driving on the highway?

1 Answers
SanLilliana
07/29/25 5:47pm
It is not advisable to keep the external air circulation on while driving on the highway. Here are the specific details: Introduction: When the external air circulation is turned on, outside air enters the vehicle, keeping the interior fresh and ensuring smooth breathing for passengers. However, because outside air is continuously entering the cabin, the air conditioning compressor needs to work constantly to maintain the temperature, which consumes more fuel. Correct use of external air circulation: When driving on the highway with smooth traffic and good road conditions, you can keep the internal air circulation on for extended periods to maintain the temperature. However, it is essential to switch to external air circulation for 5 to 10 minutes within an hour to allow fresh air in and increase the oxygen level inside the vehicle. Learn to use both internal and external air circulation flexibly. For example, in situations like tunnels where the air quality is poor, you can switch to internal air circulation to effectively prevent dirty outside air from entering the cabin. Conclusion: Using either internal or external air circulation for extended periods is incorrect. The right approach is to alternate between them flexibly based on the actual situation.
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