Basement dehumidifiers are effective at reducing moisture the accumulates in the areas of the home with little air ventilation. Basements are often the dampest area of the house because of being most often a closed-in area with low airflow, along with the presence of the washing machine and sweaty plumbing during hot humid summer days that can contribute to dramatically raise the humidity levels in a basement. A properly sized dehumidifier can greatly reduce the moisture and unpleasant odors often associated with a basement. Odor is not the only target of a basement dehumidifier.
Poor air quality can be due in part to high levels of dust which carry microscopic insects known as dust mites. Dust mites as well as mold love humidity which the dehumidifier can bring down to a safer range between 30% to 50% RH. A dehumidifier circulates the basement air through its filter, removing not only moisture but also dust.
Basements can often be uncomfortable due to the moisture level and the associated odor. A dehumidifier works to counter those effects by removing the moisture from the air and reducing mold buildups and associated odors. It can also function as an air purifier, removing dust from the air along with the microscopic mites that are carried with it.