Fans were used in China as long ago as 1000 BC. Some deities are depicted with a fan intended to drive out evil spirits. In feng shui, fans are primarily used for guiding energy in a desired direction. Even if hung on a wall, the fan’s symbolic meaning will still serve its purpose.
The symbolic effect of a fan can be enhanced by the use of color, a motif (peacock, dragon, crane) or a calligraphic design (luck, long life). Some applications for fans in feng shui treatments include placing on a staircase to guide energy upward, in a long hallway to guide energy, or in large rooms to improve the circulation of energy.
It is important to note that the open side determines the direction of the flow of energy. Never point the fan straight up or straight down, but always at an angle.
A helpful affirmation to say while placing your fan is: “Energy is flowing, and I determine the direction.”
Source: Feng Shui Symbols by Christine M. Bradler & Joachim Alfred P. Scheiner.