Should Car Heating Use Internal or External Air Circulation?

[MaciRose]

Whether to use internal or external air circulation for car heating depends on different situations: 1. Use internal circulation for short-distance driving; 2. Use external circulation for long-distance driving. Internal and external circulation respectively refer to: 1. Internal circulation means the air conditioning system is closed to outside air and can only circulate the air inside the car cabin; 2. External circulation means the car air conditioning system is open to outside air and draws in outdoor air for circulation. The method to turn on the heating is: 1. Locate the air conditioning control buttons at the display position in the cockpit; 2. Click the off button on the air conditioning control panel to activate the vehicle's air conditioning; 3. Press the air conditioning button to turn off the car's cooling function; 4. Rotate the temperature setting knob to the desired temperature to activate the heating.