Does the external circulation require turning on the fan speed?

1 Answers
SanHarmony
07/29/25 1:34pm
External circulation does not require turning on the fan speed. Definition of external circulation: External circulation refers to the process of drawing air from outside the vehicle, cooling or heating it through the blower, with the primary feature being the ability to replenish fresh air from outside and maintain air flow. Usage of external circulation: Turn on the external circulation of the air conditioning system and reduce or turn off the fan speed. This allows for air circulation inside the vehicle while maintaining a comfortable temperature, resulting in a more pleasant experience. During long drives on highways, a sense of suffocation may develop due to increased carbon dioxide concentration inside the vehicle. Turning on the external circulation ensures timely replenishment of fresh air into the cabin.
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