What is the correct way to use the internal and external air circulation?

[Desiree]

Allow the car to warm up for a while, and turn on the heater after the water temperature rises. First, switch to external circulation to expel all the cold air inside the car. Once the temperature stabilizes, appropriately switch to external circulation to exchange air with the outside. To maintain the interior temperature, use internal circulation. Do not open the windows; simply turn on the external circulation.

[RichardDella]

As a frequent city commuter, I've always considered the switching between air recirculation and fresh air modes as a crucial driving skill. Recirculation mode primarily circulates cabin air, which is especially useful for avoiding exhaust fumes in traffic jams or during harsh weather like sandstorms, while also enabling faster cooling/heating and better fuel efficiency. Fresh air mode brings in outside air, ideal for highway driving or clear days when you want better ventilation, and particularly effective for quick defogging when combined with the blower. I remind myself not to use recirculation mode for extended periods to avoid stuffy air that may cause motion sickness, so I switch to fresh air mode every half hour for ventilation. The operation is simple - just press the dashboard button, and it becomes second nature with practice, ensuring both safety and comfort.

[VanElaina]

As a parent who frequently travels with kids, I pay special attention to how in-car air quality affects children. The recirculation mode is incredibly useful during high pollution or pollen seasons—it blocks external odors and allergens from entering the vehicle, safeguarding health. On the other hand, fresh air mode is key to preventing stuffiness, especially when kids are playing in the back seat, as it brings in fresh air to avoid CO₂ buildup that causes drowsiness. My routine is to use recirculation during heavy smog, switch to fresh air mode in the early morning or after rain for cleaner air, and immediately activate fresh air mode with defrost to dehumidify when fogging occurs. By regularly following these steps, the cabin stays comfortable and safe, making trips more worry-free.

[DeGia]

When I first got my driver's license, I was confused about the air recirculation function, but now I understand its value. The recirculation mode is suitable for quickly adjusting the temperature, like warming up the car faster in winter or blocking cold winds; the fresh air mode works well on humid days to prevent window fogging and ensure clear visibility. Just press the button on the climate control panel to operate - close recirculation and open fresh air in polluted areas. After developing the habit of switching modes, driving becomes more reassuring and saves on electricity costs.

[Devon]

As a long-distance driving enthusiast, I've found that adjusting the air conditioning's recirculation settings can greatly enhance the journey experience. The recirculation mode provides excellent heat retention in cold weather and improves cooling efficiency when the AC is on; while the fresh air mode introduces outside air, ideal for highway driving when opening windows isn't convenient or after rain for better breathing, especially effective at quickly dehumidifying and defogging windows. My routine is to use recirculation in urban traffic to avoid exhaust fumes, switch to fresh air on highways for ventilation, and alternate between them every hour to maintain air circulation. This maintains a stable cabin environment, reduces fatigue, and makes the trip more enjoyable.

[Vargas]

Living in the north, I've grown accustomed to driving in harsh winters, and mastering the use of air recirculation makes the ride much more comfortable. The recirculation mode prevents heat loss and warms up the car quickly, which is ideal for cold starts. On the other hand, the fresh air mode prevents window fogging and ensures clear visibility, especially on snowy or foggy days when turning it on or adding A/C dehumidification quickly restores clarity. I usually start by warming up the car with recirculation on for a few minutes, then switch to fresh air mode to ventilate and avoid stuffiness. These simple yet effective strategies ensure a safer and hassle-free driving experience.