Air-Dryr is the safe, inexpensive & effective way to fight mildew, mold, cold drafts and corrosion. Ideal for boat, RV, home, office and any area with moisture build-up. Cool, damp air is drawn through the bottom base panel, then heated and released through the top perforated surface.110 volt, Model 1458 is recommended for enclosed space up to 1000 cubic feet (10x10x10) in motor homes, trailer, campers, boats, cabins, stored vehicles, etc. Measures 14"D x 14"W x 4.5"H. Draws 1.1 amps, Silent operation - no moving parts, Trouble free - no switch, no fan, no thermostat to break down.