What does the REST function in air conditioning mean?

[McHarmony]

REST in air conditioning refers to the residual heat function. More details about the residual heat function are as follows: 1. The residual heat function utilizes the engine's remaining heat to continue providing warm air inside the vehicle after the engine is turned off, automatically shutting off after half an hour. 2. The residual heat function can supply warm air for a period of time even after the engine is turned off. Higher-end models may also feature dual-zone air conditioning, which includes two or more temperature setting buttons/knobs, usually with a synchronization button that allows simultaneous adjustment of temperature and airflow on both sides.