Water mist systems begin with a high pressure pump and a spray nozzle designed to produce tiny water droplets that cool the air as they flash evaporate. Performance is enhanced by increasing the number of nozzles used and adjusting the water pressure. In drier climates, temperatures may be reduced by 30 degrees Fahrenheit without a noticeable increase in relative humidity.

Water mist systems are great for patios and outdoor seating areas. Greenhouses benefit greatly as well, and many consider misting units to be standard equipment that increases plant health and productivity.