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Should the car air conditioning use internal or external circulation?

1 Answers

Joann

07/29/25 12:13pm

When you first turn on the air conditioning, you can choose internal circulation. When the temperature inside the car becomes comfortable, you can switch to external circulation. It is recommended to alternate between internal and external circulation. Here are some relevant details: 1. External circulation: External circulation brings in fresh air by using a fan to draw outside air into the car. The air channels inside and outside the car are interconnected, so even if the fan is not turned on, airflow is still drawn into the car while driving, replenishing fresh air inside. 2. Internal circulation: Internal circulation blocks polluted air by closing the airflow channels between the inside and outside of the car. Without the fan, there is no airflow circulation, and when the fan is turned on, the airflow drawn in comes only from inside the car, creating an internal airflow cycle. This effectively prevents external dust and harmful gases from entering the car.

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