What function does the HVAC system NOT perform?

The HVAC (Heating, Ventilation, and Air Conditioning) system in a vehicle is designed to manage the interior climate by performing several key functions. While it does heat the air, cools the air, and filters it to improve air quality, the aspect of humidifying air is not traditionally recognized as one of its primary functions.

In dry conditions, the HVAC system can maintain comfort levels primarily through heating and cooling, but it does not intentionally add humidity to the air. In fact, most automotive HVAC systems are designed to remove excess humidity, particularly in humid conditions, to prevent fogging on windows and to enhance the comfort of passengers.

Therefore, attributing the function of humidifying air as a primary role of the HVAC system is a misconception, making it the correct choice as the function that the HVAC does not perform in the same capacity as the others.