Should You Use Internal or External Air Circulation in Winter?

1 Answers
LaPenelope
07/29/25 9:34pm
Whether to use internal or external air circulation in winter depends on different situations: use internal circulation for short trips and external circulation for long trips. Internal and external air circulation in cars refer to: 1. Internal circulation means the air conditioning system is closed to outside air and only recirculates the air inside the car; 2. External circulation means the air conditioning system is open to outside air and draws in fresh air from outside the car. The functions of a car air conditioning system are: 1. To cool, heat, ventilate, and purify the air inside the car; 2. To provide a comfortable environment for passengers, reduce driver fatigue, and improve driving safety.
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