A conventional air conditioner dehumidifies automatically, and that is all the dehumidification many homeowners will ever need. However, localized humidity problems in a damp basement or an area of the home not serviced by existing ductwork can create discomfort. Solve those problems with a portable or room dehumidifier. These tools let you remove moisture in a single-zone or limited-space environment. If you're having humidity problems, we highly recommend them.