CoolBox Three Speeds Portable Evaporative Air Cooler Cool-A-Zone CoolBox 1050 Sq. Ft. Portable Evaporative Air Cooler – C100. Cool-A-Zone CoolBox 1050 Sq. Ft. Portable Evaporative Air Cooler – C100: Control the climate of your outdoor space with this CoolBox from Cool-A-Zone. Ideal for backyards, outdoor events, this evaporative air cooler can lower air temperatures directly in front of unit from 10 – 25 degrees using water-soaked cooling pads. No condensation or exhaust hose is required to use this air cooler, simply fill the 21 gallon reservoir with water, plug it in and then chill out. Because the CoolBox maintains continuous circulation, it is effective at controlling mosquitoes during your outdoor barbeques or pool parties. This machine is capable of moving 4120 CFM of air, cooling 1050 square feet of space, while ionizing the air. The digital control panel on the unit allows you to set a run-time, control the temperature output, set the 3-speed axial fan, and it displays a low-water warning. In case you are not around to receive the warning, the pump will shut off automatically when the water level gets too low to prevent the pump from burning out. This OSHA-compliant air cooler runs quietly, 1050 Sq. Ft. Cooling Capacity. 4,120 CFM Air Delivery. 3 Speed Axial Fan. 21 Gallon Water Reservoir. 30″ Wide X 55″ Height X 23″ Depth. Item Weight – 62 lbs. Lowers Ambient Air Temperature 10 – 25 degrees. OSHA Compliant. 21 Gallon reservoir can be manually filled or continuously filled by connecting with a standard water hose. Technically advanced digital control panel allows for run-time settings, output temperature control, fan speed and low-water warning. Automatic Pump Shut-Off when water level is low.