Air dehumidifiers can be used to control mold growth in areas of the home that are more susceptible to dampness. You should also avoid using carpet and upholstered furniture in these areas, as they will provide breeding grounds for mold. You may not be able to see the mold growing, as many times the contamination happens underneath the carpet and furniture.
Basement dens, lounge areas, and other potentially damp areas are vulnerable to mold unless dehumidifiers are used on a regular basis to control the air. Condensation is a problem in basement areas, but you can fight it by covering pipes and other moisture collecting surfaces with insulation. In addition to running a dehumidifier, it's important to use fans to increase fresh air circulation. These things used together will all go a long way towards preventing mold growth.