The charcoal will attract moisture out of your air, little by little lowering the humidity problem in the region. This method functions best in smaller spaces. A yellow tub mat on the floor nect to some bathtub with a towel thrown over it (Graphic credit rating: Shutterstock) Photo: iStock You https://www.penmann.co.uk/blog/industrial-dehumidifiers-managing-moisture-in-controlled-environments/