The MasterCool(r) portable evaporative cooling units from AdobeAir, Inc. (Phoenix) cool 1,400 to 3,000 sq ft as distances of 50 to 75 ft. No installation is needed at the unit's 20-ft, 16-gal power cord can plug into standard 120-V receptacles. Other features include ground fault circuit interrupter protection to prevent electrical shock, and Emerson motors. Water is supplied through a standard garden hose or optional 55-gal water tank.