What does the DUAL button on the car's air conditioning mean?

[Warren]

The DUAL button on the car's air conditioning refers to the dual-zone climate control function. When you press the DUAL switch, it allows independent temperature adjustment for either the driver's side or the front passenger's side. This feature meets the different temperature requirements of occupants in two separate positions within the vehicle. The independent temperature zones enable flexible adjustment between different temperature differentials. Air conditioning zoning is based on load analysis, which rationally divides the entire air conditioning area into several temperature control zones according to differences in cooling/heating loads. The purpose of air conditioning zoning is to enable the system to effectively track load changes, improve indoor thermal comfort, and reduce energy consumption. The AUTO button in vehicles represents automatic climate control. When pressed, the system automatically adjusts temperature and airflow based on weather conditions, road situations, etc.