Davis Air-Dryr Marine Dehumidifier A marine dehumidifier is an essential piece of boating equipment to prevent mold, rot, corrosion, and bacteria onboard any craft. The compact but powerful Davis Air-Dryr marine dehumidifier will fit almost anywhere and is designed to operate 24 hours a day to prevent excess moisture, drafts, and corrosion damage. Simple to use, just place the Air-Dryr on the floor in any damp, enclosed space and plug it into a 110120 volt outlet. The machine heats damp air unti