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How do I know if I need a dehumidifier?

Most homes and businesses in humid climates can benefit from the use of a dehumidifier. There are some obvious signs, too. Symptoms of excessive humidity include moisture marks on walls and ceilings, warped or damaged wood (wood swells in high humidity conditions) peeling wallpaper, blistered ceilings, creaky floors, sticking doors and cabinets, musty odors and mold growth. Of greater concern may be symptoms of mold and mildew allergies.