The Cool-Space 350 from Big Ass Fans is a versatile fan that can put out up to 3,400 cfm of airflow, covering an area of up to 2,300 sq. ft. Designed to cool large indoor and outdoor spaces, such as auto bays, by up to 33 degrees F. Its portable design allows the fan to travel with its user and its 50-gallon reservoir enables 10 hours of hose-less runtime. The fan is algae and mold-resistant for cleaner, safer air. The fan's diameter is 20" and its cooling media is 8". As well as this, the fan is equipped with a variable speed dial and pump switch.