Cool-Space CS6-36-VDCool-Space AVALANCHE-36-VD, 9700 CFM, Variable Speed Portable Evaporative Cooler with 3600 sq. ft. Cooling Capacity The industrial grade COOL-SPACE 36" variable speed, direct drive is completely portable with a thick, UV resistant housing that will not leak or rust A large 46 gallon built in water reservoir offers hours of operation without a water supply connection Edge coated cooling media for durability and exteneded life Longest warranty in the industry!