Commercial evaporative coolers, also known as swamp coolers, provide powerful cooling in large indoor areas, manufacturing plants, and outdoor spaces. A cost-effective solution for portable cooling in dry climates, an industrial evaporative swamp cooler uses the natural process of water evaporation to reduce heat and naturally humidify the air. Many models connect to a standard garden hose and feature remarkable airflow capacities, some units pull in as much as 9,600 CFM.