What is the main function of a dehumidifier?

The primary function of a dehumidifier is to remove excess moisture from the air. This process is essential in controlling humidity levels within a space, which can lead to a more comfortable environment and help prevent issues such as mold growth, dampness, and other moisture-related problems.

By drawing excess moisture from the indoor air, dehumidifiers help maintain optimal humidity levels, typically between 30% and 50%, which is ideal for health and comfort. This can be particularly important in areas prone to high humidity, such as basements or bathrooms.

The other options address different functions that do not pertain to the core purpose of a dehumidifier. Heating the air, providing air circulation, or cooling the air are functions associated with other devices, such as heaters, fans, and air conditioning units. While these devices may help create a comfortable environment, they do not specifically target moisture levels in the same way a dehumidifier does.