Evaporative cooling is also used in cooling towers to cool both indoor and outdoor spaces. These are basically a tall hollow tower with hanging fabric inside at

Evaporative cooling is also used in cooling towers to cool both indoor and outdoor spaces. These are basically a tall hollow tower with hanging fabric inside at the top that is kept wet. Hot air enters at the top, and gets cooled by losing it's heat to evaporate the water; then, with cooler air being more dense, the air "falls" town the inside of the tower and flows out at the bottom cooling the surrounding area. http://www.2030palette.org/evaporative-cooling-towers/ http://www.2030palette.org/evaporative-cooling-towers/