DescriptionEvaporative cooling fans are designed to pull hot, dry air through a water-soaked media filter using a water pump and fan it cools up to 500 sq.ft. area. As the water evaporates into the air, the air's temperature will lower. They are optimal when used in hot, dry climates used to filter ambient air while increasing condensation and delivering cool airflow. It has a 10.3-gallon water tank creating up to 3-4 hours of use. The built-in float valve and garden hose adapter allow for easy connection and continuous water flow without overflowing your tank., 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.