PORT-A-COOL® EVAPORATIVE COOLER 36" 3-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. 4" heavy-duty plastic swivel casters (2 locking) allow portability. Energy efficient motor and pump. Heavy-duty ½ HP motor. Provides 2,500 sq ft. cooling area and includes a 32 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.