Should the car heater use internal or external air circulation?
2 Answers
When using the car heater, it's recommended to first activate internal circulation to warm up the cabin, then switch to external circulation. The steps to operate the heater are: 1. Locate the air conditioning control buttons on the dashboard; 2. Press the ON button on the air conditioning control panel to activate the system; 3. Click the A/C button to turn off the cooling function; 4. Rotate the temperature control knob to set the desired temperature for heating. The car air conditioning system is an installed air regulation device with these functions: 1. It can cool, heat, ventilate and purify the air inside the cabin; 2. Provides passengers with a comfortable environment; 3. Reduces driver fatigue and improves driving safety.
In winter when I first get in the car and turn on the heater, I always start with recirculation mode first. Foggy windows are particularly annoying, and recirculation does heat up faster. Once the car is warm, I immediately switch to fresh air mode for ventilation - staying too long in recirculation can cause dizziness and drowsiness. Once I forgot to switch for two hours of driving and got out with my head buzzing. On highways I occasionally switch to fresh air too, otherwise the windshield fogs up badly. But rainy days require special attention - fresh air mode can cause water droplets to form outside the glass, when the defroster button becomes much more important than air circulation modes.
