What is the main purpose of a dehumidifier in an HVAC system?

The main purpose of a dehumidifier in an HVAC system is to remove excess moisture from the air and prevent mold growth. High humidity levels can create an environment conducive to mold, mildew, and other allergens, which can negatively impact indoor air quality and occupant health. A dehumidifier works by drawing in humid air, cooling it to a temperature that causes moisture to condense, and then collecting that moisture, thereby reducing the overall humidity level in the space. This process not only enhances comfort but also protects the structural integrity of buildings and helps maintain a healthier indoor environment.

While options that suggest adding moisture or significantly cooling the air are inaccurate regarding the function of a dehumidifier, it's also important to note that circulating air faster through ducts is not the primary goal of a dehumidifier. Instead, the primary focus is on moisture control, which is essential for comfort and health in indoor spaces.