What Causes Condensation Inside the Car?

[RyleeLynn]

Due to the temperature difference between the inside and outside of the car, the window glass, which is in contact with the outside, has a lower temperature. The water vapor inside the car condenses on the glass, forming fog. Here’s an introduction to fogging: Specific Introduction to Fogging: When the window temperature is below the dew point, and given a certain air humidity, if the window temperature is lower than the dew point, condensation easily forms on the surface of the window. This results in the common fogging phenomenon on the front windshield. Introduction to Window Defogging Methods: The car's air conditioning system has a window defogging function. In operation, automatic air conditioning makes defogging very easy. Simply turn on the automatic air conditioning, adjust the mode switch to the defogging setting, and the air conditioning will automatically switch to external circulation, allowing fresh outside air to enter the cabin and begin the defogging process.