The size of dehumidifier needed for an RV is typically a dehumidifier that covers 900 to 1800 cubic feet. The specific size is dependent on the size of the RV, with larger RVs requiring large-tank dehumidifiers while small RVs can use mini dehumidifiers.
Dehumidifiers are commonly used in RVs to eliminate damp floors and condensation on windows. Humidity can cause skin problems and excessive sweating. A dehumidifier can be portable and battery powered, or may require a plug-in power supply. A dehumidifier is typically placed in close proximity to the drainage area to allow easy disposal of the water when the unit is saturated.