Ironwood Pacific DryWave 1000 Air Dryer, Prevents Mold and Mildew, Ideal for Boats, RVs, Cabins, Basements Uses convection heating to gently warm the air and raise the dewpoint to prevent mold and mildew; ideal for boats, RVs, cabins, basements, trailers, walk-in closets, and other enclosed spaces up to 1000 cubic feet Has no fan or moving parts; designed to operate 24 hours a day for extended periods; includes a thermal shut off switch to prevent overheating, with automatic restart when the unit cools down Plugs into a 120-volt outlet and draws no more power than a standard light bulb; does not require refilling like chemical dehumidifiers, or emptying like traditional dehumidifiers Works by raising the air temperature and is designed for cool, moist climates; most efficient in temperatures between 32 and 65 Fahrenheit; not intended for warm, humid environments like Florida or Hawaii For use in spaces up to 1,000 cubic feet; DryWave measures 13.5" L x 10.5" W x 4" H; Made in the USA