Which Circulation Mode to Use for Long-term Parking?

[DiCatherine]

When parking for an extended period, the appropriate circulation mode should be selected based on actual conditions. Here are the details: 1. External Circulation: This mode draws air from outside the vehicle, directs it through the air conditioning system for heating or cooling, and then blows it out through the vents. External circulation replenishes fresh air and improves cabin air quality. However, in extremely hot and dry weather, using external circulation requires the AC compressor to work continuously to cool the incoming hot air, which consumes additional fuel. 2. Internal Circulation: This mode recirculates the existing cabin air. The AC system draws in cabin air, cools it, and then returns it to the cabin. Once the cabin temperature reaches the set value, the AC compressor disengages, reducing engine load. Therefore, the faster the cabin temperature reaches the set value, the sooner the engine load decreases, resulting in lower fuel consumption.