How to Turn On the Car's Internal and External Air Circulation?

[EmmanuelAnn]

Regarding the usage of internal and external air circulation, the details are as follows: 1. The internal circulation symbol is: a circular arrow inside a car graphic, while the external circulation symbol is an arrow entering the car from outside. 2. Simply put: the car's internal circulation means the air inside the car is heated or cooled and then recirculated back into the car; external circulation means the air outside the car is heated or cooled and then brought into the car, allowing gas exchange between the inside and outside of the car. 3. Using external circulation: you can breathe fresh air from outside. When driving on the highway for a long time, the air inside the car may become stale, making you uncomfortable, and you can't open the windows. In this case, you should use external circulation to bring in fresh air. In winter, if the warm air feels too hot, you can turn off the fan and open the external circulation, which maintains the car's temperature while providing fresh air, making you feel more comfortable. 4. However, if you're using the air conditioning to lower the car's temperature: you should not turn on the external circulation. Instead, you can occasionally switch to external circulation to let in some fresh air. If you're in a traffic jam, you should turn on the internal circulation.