What does the internal circulation A mean?
2 Answers
Internal circulation A stands for automatic. Here is more related information: 1. Car circulation: (1) Internal circulation: The air conditioning system adjusts the air quality inside the car, allowing the internal air to circulate within the vehicle. (2) External circulation: The air conditioning system adjusts the air quality outside the car, continuously bringing fresh air into the vehicle to replace the internal air. 2. Difference between internal and external circulation: The difference between internal and external circulation is simply the closing of the air intake channel. To put it simply, it's like blowing an electric fan in a closed room. Since the airflow circulates in a closed environment, the exhaled air will be inhaled again, making it an unhealthy ventilation method.
I've been using this recirculation mode for over a decade in my car, so I know it best! It makes the AC circulate only the air inside the car, completely isolating it from the outside. It's especially useful on rainy days or when passing through dusty construction sites—it instantly prevents window fogging and keeps dust out. When encountering truck exhaust on highways or bad odors in tunnels, just hit the recirculation button—it's much faster than closing the windows. But be careful: using it too long can make the air stuffy, especially when cooling the car in summer. It's best to use recirculation for the first ten minutes to cool down quickly, then switch to fresh air mode for ventilation once it's comfortable—this helps avoid drowsiness. Never use recirculation for entire long tunnels—oxygen deprivation can be dangerous!
