Hessaire MC37V 3,100 CFM (Cubic Ft per Min) 3-Spd Port Hi Vel Cool Fan-Evap Coolr for 950 sq.ft. Gry High-density media provides 80% more evaporation surface compared to normal density media. Direct connect to hose feature to enable constant water supply option to bypass having to fill water tank . Ideal for use in outdoor areas, not designed for use in totally enclosed spaces . Molded with a polypropylene resin, creating a strong, yet lightweight design. Patented axial propeller is energy efficient and throws cool air farther. Set of outer vertical louvers you can manually position. Features an oscillating design for maximum. Water tank holds 10.3 Gal., for a 3-4 hour run time cooling. Heavy duty construction for residential or commercial use. Most CFM delivered per $ of any evaporative cooler. Not designed for use as an indoor air conditioner MC37V