Radon mitigation systems can be a solution for indoor humidity control. Because sub-slab depressurization systems remove soil gasses from under the floor, they also remove large amounts of water vapor that could otherwise enter the basement or crawlspace. A radon mitigation system can dramatically help effect the dampness, the smell, and the mold susceptibility of those areas.
DuPage Radon Contractors have experience installing systems for the primary purpose of indoor humidity control in a lower level.