Ceiling fans are very affordable to run, and by circulating cool air, your air conditioning won't need to run as often. Just make sure fans are set to rotate in a counter-clockwise direction - this draws cool air upward, and is the most efficient setting for the hot summer months.

Business Wire/File
Ceiling fans can circulate a cold breeze in the summer and warm air in the winter. To maximize the efficiency of your ceiling fan, set it to rotate counterclockwise.