In winter, should the heating system use internal or external air circulation?
2 Answers
In winter, when turning on the heating, it is recommended to first use internal air circulation until the car interior warms up, then switch to external air circulation. The method to activate the heating is as follows: adjust the air conditioning circulation mode to internal circulation, turn the temperature control switch to the red zone, set the blower speed to an appropriate level, and adjust the air vent direction. Car air conditioning, short for automobile air conditioning system, is used to regulate and control the temperature, humidity, air cleanliness, and airflow inside the vehicle cabin to an optimal state. The car air conditioning system, installed in vehicles, serves the following purposes: 1. It can cool, heat, ventilate, and purify the air inside the cabin; 2. It provides a comfortable environment for passengers; 3. It reduces driver fatigue and enhances driving safety.
When turning on the heater in winter, I usually start with the recirculation mode for a few minutes to quickly warm up the air inside the car, saving time and getting warm faster. Once the temperature is comfortable, I switch to fresh air mode to bring in outside air, preventing dizziness or window fogging. Honestly, using only recirculation for too long makes the air stuffy and smelly, which can cause drowsiness. Especially during long drives, alternating between modes is safer and more comfortable. Remember to check the cabin air filter regularly—winter brings more dust, and a clogged filter reduces efficiency. These tips come from a decade of driving experience and also help minimize fogging issues.
