How to Use Car Interior and Exterior Circulation?
2 Answers
When turning on the air conditioning for cooling or heating, you can first activate the interior circulation to quickly lower or raise the temperature inside the car. Once the temperature stabilizes, appropriately switch to exterior circulation to allow fresh air to flow in. Here are some introductions about car interior and exterior circulation: 1. Interior Circulation: If the air conditioning is used to lower the temperature inside the car, do not turn on the exterior circulation at this time. You can occasionally switch to exterior circulation to let in some fresh air. 2. Exterior Circulation: Using exterior circulation allows you to breathe fresh air from outside the car. If the warm air in winter feels too hot, you can turn off the fan and open the exterior circulation to maintain the interior temperature while still getting fresh air.
While driving, I frequently switch between recirculation and fresh air modes to maintain cabin comfort. The recirculation button closes the external air intake, which is ideal for urban traffic jams or severe air pollution—it blocks exhaust fumes and odors while making the AC cool faster. Fresh air mode opens the intake to bring in outside air, such as during highway driving to prevent CO₂ buildup that causes drowsiness, or to quickly dehumidify when windows fog up. I adjust based on road conditions: use fresh air more often in rain or fog, and recirculation in dusty areas to protect respiratory health. But avoid prolonged recirculation—switch to fresh air when the cabin feels stuffy. Regular maintenance includes replacing the cabin air filter to ensure smooth airflow.
