How to Correctly Use the External and Internal Air Circulation in a Car?

[LeEmilio]

The correct methods for using the external and internal air circulation in a car are: 1. After the vehicle has been exposed to the sun outdoors, first turn on the external circulation to ventilate and dissipate heat when getting in the car. You can also open the windows and sunroof to speed up the cooling process. After 3 to 5 minutes, when the interior temperature has stabilized, close the windows, turn on the air conditioning, and switch the air circulation to internal mode. 2. In cold weather, wait a moment after getting in the car until the engine temperature reaches the normal level. Then, turning on the heater with internal circulation can quickly raise the temperature. 3. During traffic jams, turn off the external circulation to block exhaust fumes from the vehicle in front. 4. When driving at high speeds, you can turn on the external circulation as needed. Prolonged use of internal circulation during long highway drives can lead to stale air inside the car. Switching to external circulation helps maintain interior temperature and provides fresh air. 5. When parked, if you need to rest in the car with the air conditioning on, periodically switch to external circulation or leave a small gap in the window.