Features and Benefits: Indoor/Outdoor Low Humidity Environments 1300 CFM 500 sq. ft. 2-Speed Fan 53.4 dB Dark Gray EVAPORATIVE COOLING: HESSAIRE?s evaporative cooling fans are designed to pull hot dry air through a water-soaked filter using a fan to decrease the ambient temperature. It DOES NOT use refrigerants to remove heat like an air conditioner INCREASE HUMIDITY IN DRY CLIMATES: The MC18V evaporative cooling fan is optimal when used in hot dry climates to filter ambient air while increasing the condensation and delivering 1 300 CFM of cool airflow. Not effective in high humidity areas ENERGY EFFICENT & ECO FRIENDLY: Evaporative cooling fans save up to 50% on electricity compared to refrigerated air conditioning systems. Using water instead of refrigerant prevents any release of ozone depleting chemicals into the air MANUAL & CONTINUOUS WATER FILL: Hessaire?s MC18V has a 4.8-gallon water tank creating up to 3-4 hours of use. The built-in float valve and garden hose adapter allow for easy conne