Ceiling Fans: Clockwise Vs. Counterclockwise
Ceiling fans will run counterclockwise or clockwise with the flip of a switch. According to the City of Glendale, Calif., Water & Power Co., it costs 70 cents per month to run a ceiling fan.
Ceiling fans that run counterclockwise during summer provide a breeze that cools the warm air. Running a ceiling fan can save on the cost of using a small window air conditioner, which costs about $9 per month, the Glendale power company says.
During the winter, a ceiling fan should run clockwise so that the fan blades force the warm air back down into the room. Run a fan on low speed to avoid causing a breeze when the air moves downward. If you run the ceiling fan and turn down your thermostat, you could see a 2 percent savings on heating bills for each degree lower you go, the This Old House website says.
If the height of a ceiling is higher than 8 feet, a ceiling fan requires more speed to force the warm air toward the floor. For this reason, a fan that sits on a higher ceiling should run clockwise on medium to high speed during winter.