When the car starts, the air temperature rises.

The heat energy of automobile warm air comes from the cooling water of the engine. As long as the engine water temperature reaches normal operation, it will be 90 degrees. At this time, it is best to turn on the warm air. To quickly raise the temperature of the engine, you can preheat the engine in advance, wait until the temperature comes up before starting, and the warm air in the car can achieve the ideal effect.