Air washers and accessories include mist water eliminator and evaporative cooling units. Air is circulated through a wet pad in evaporative cooling units, where the water evaporates to cool the air. A comfortable atmosphere is then created by circulating the cooled air throughout the area or space. Evaporative cooling works well in hot, dry areas because it may effectively chill a place without the use of refrigeration or other mechanical devices. Air washers and accessories come in two primary varieties: direct and indirect. While indirect evaporative cooling units cool the air after they circulate it through the space, direct units cool the air directly.