Evaporative cooling fans, also commonly referred to as swamp coolers are designed to pull hot, dry air through a water-soaked media filter using a water pump and fan. 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 the moisture and delivering cool airflow. Evaporative cooling fans do not use refrigerants to remove heat like an air conditioner, so they are less effective in high humidity areas. Hessaire MC18M cooling fans are the most versatile portable evaporative cooling fans on the market, delivering 1,300 CFM of cool airflow covering up to 500 sq ft of open space. The MC18M cooling fan has a 4.8-gallon water tank creating up to 3-4 hours of use.
