How Long Can the Internal Circulation Be Kept On?
1 Answers
Do not keep the internal circulation on for too long. The internal circulation mode closes the airflow channels between the inside and outside of the vehicle. Without the fan, there is no airflow circulation, and when the fan is on, the airflow drawn in comes only from inside the car, creating an internal airflow cycle. The purpose is to prevent harmful external substances from entering the vehicle and to maintain warmth. However, prolonged use can cause a feeling of stuffiness. Additional Information: Usage of Internal and External Circulation: 1. External Circulation: If driving at high speeds for a long time without ventilation, the air inside the car becomes stale. In summer, you can open the windows for ventilation, but in autumn, opening windows at high speeds can be very cold. In such cases, turn on the external circulation to ensure timely air exchange, maintaining warmth while keeping the air fresh. 2. Internal Circulation: It can block external air, but prolonged use during long drives can lead to oxygen deprivation inside the car, especially when there are many passengers. Oxygen deprivation can cause dizziness and reduced concentration for the driver. Therefore, if the temperature inside the car is comfortable, it is recommended to turn off the internal circulation and switch to external circulation to allow fresh air into the vehicle.