Fans and blowers are mechanical devices which are used to move air or other gases. Fans create a pressure differential in the surrounding air and use this pressure to force air to move. This movement of air creates a cooling effect and can be used in several different applications. Blowers are similar to fans, however they create a greater pressure differential and can move larger amounts of air. Blowers are often used in industrial applications or to move a high volume of air over large distances.