PORT-A-COOL® EVAPORATIVE COOLER 48" 2-Speed Evaporative Cooler Utilizes highly efficient housing design to produce effective cooling in high humidity conditions. Helps increase worker productivity by making a more comfortable work environment. Durable one-piece molded plastic polyethylene housing with leak-resistant, one-piece molded plastic internal water tank. Water supplied to internal tank through standard 3/4" hose. 8" non-deflatable rubber swivel casters (2 locking) allow portability. Energy efficient motor and pump. Heavy-duty 1 HP motor. Features a 2-speed motor for up to 4,000 sq. ft. cooling area and includes a 40 gallon water tank. Optional 50 Gallon Water Tank (sold separately) is available for 36" & 48" models. UL listed. Fully assembled. Horsepower rating based upon maximum speed/load.