Fans were introduced in the chapter: Caution to the Wind.

Fans can use wind to blow any Fluid at any angle to a certain point that it can no longer reach. Fans can be activated by triggers but will only be activated by the color of trigger that the fan displays.

Fans are quite powerful, and can be useful or level-ending deadly. Fans bring a new aspect to the game and many people are quite happy with the new complex levels that fans can make.

Triggered fans.