Should You Use Internal or External Air Circulation When Running the Car AC in Summer?
2 Answers
Whether to use internal or external air circulation when running the car AC in summer depends on the situation: use internal circulation for short trips and external circulation for long trips. Internal and external circulation in cars refer to: Internal circulation: The AC system is closed to outside air and can only circulate the air inside the car cabin; External circulation: The AC system is open to outside air and draws in fresh air from outside the car for circulation. Car air conditioning refers to the air conditioning device installed in vehicles, which can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety.
As an experienced driver, I believe using the air recirculation mode is the best choice when driving with AC in summer. When the outside temperature is too high, I first turn on the air recirculation mode so the AC only circulates air inside the car, cooling it down faster and more efficiently. After a few minutes when the temperature drops, I switch to fresh air mode to let in outside air, preventing the cabin from becoming stuffy or foggy. This switch is crucial, especially in crowded urban areas, as it saves fuel and improves comfort. Keeping the air recirculation on all the time isn't good either, as it can make people feel oxygen-deprived and fatigued. Having driven for over a decade, I find this method simple and reliable. I use it every time I drive, making hot-weather driving more comfortable and efficient.
