Reply to "basement humidity"

I found that getting air conditioned "air" into a basement, which is not always feasible, but that and a dehumidifier is the key solution. In summer high humidity situations, a dehumidifier by itself will remove moisture and at the same time warm the ambient air, which will hold more moisture and create a continuous loop of moisture entering and overwhelm the unit. The A/C will get the ambient temp down and will help with moisture removal.