A closet dehumidifier is designed to absorb moisture from enclosed spaces, which in turn protects clothing and other valuables from the effects of mold and mildew. Closets being what they are rarely have any form of ventilation or airflow through them. Even though you may think you there is no damp problem, it only takes a bed sheet or garments that are not quite dry to cause problems with mustiness from the stagnant air.
