The Outdoor Misting Nozzle is a key necessity if you wish to build your own do-it-yourself evaporative cooling system. It can be installed around the patio, pool, backyard and even the barn to help cool down the air on hot days. Keep in mind the cooling vapor is dependant on the water temperature. The nozzle is designed for producing cooling mist micro droplets. When mounted to 8' to 10' above the ground, the droplet created evaporates, limiting the surrounding air temperature. These are the same nozzles that are used on commercial mist cooling systems in restaurants, theme parks, Disney World and outdoor recreation area.