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Should the car air conditioning be set to internal or external circulation?

1 Answers

CalvinFitz

07/30/25 7:19am

Whether to use internal or external circulation for car air conditioning depends on the situation. Use internal circulation for short trips and external circulation for long trips. Internal and external circulation in cars refer to: 1. Internal circulation: Internal circulation means the air conditioning system is closed to external air and only recirculates the air inside the car. 2. External circulation: External circulation means the car air conditioning system is open to external air and draws in outside air for circulation. Car air conditioning generally includes cooling devices, heating devices, and ventilation devices. This combined system makes full use of the limited space inside the car, has a simple structure, and is easy to operate, making it the internationally popular modern car air conditioning system.

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