Ceiling Fan Direction for the Summer (Counterclockwise)
In the summer, ceiling fans should rotate counterclockwise to push cool air down to the floor. The cool air evaporates perspiration and creates a wind chill effect, which makes you feel cooler without affecting the room temperature. This allows you to set the thermostat at a higher temperature without forfeiting comfort.
Ceiling Fan Direction for the Winter (Clockwise)
In the winter, ceiling fans should rotate clockwise at a low speed to pull cool air up. The gentle updraft pushes warm air, which naturally rises to the ceiling, down along the walls and back the floor. This makes a room feel warmer, which allows you to lower the thermostat temperature and decrease the use of heating devices. Homeowners who use ceiling fans during the winter can save as much as 15 percent on heating bills.
Exceptions to seasonal ceiling fan directions
There are a few exceptions and modifications to the ceiling fan summer and winter rules that you can use to control the airflow in your home.
Vaulted ceilings: Leave the fan on the counterclockwise setting year-round. The height of the fan mount makes it unlikely you’ll feel any wind chill.
Dining rooms: To keep the fan from cooling your food too quickly, set it to turn clockwise at a medium or low speed. There will still be air circulation to cool you, but it won’t be as intense. The same can be said if you are working on paperwork at the table or perhaps playing cards. A fan set to medium and turning clockwise will keep things from blowing everywhere.
Smokers: Set your ceiling fans to run clockwise when you have a family member or guest who smokes indoors. This will draw the smoke up and away. If possible, open a few windows or turn the AC fan to exhaust and help the smoke leave the room.
Outdoor: An outdoor ceiling fan on a porch or covered patio will follow many of the same rules as above for cooling or ventilation. You can also use it on summer evenings to help with insect control. Turn the fan on and have it rotate counterclockwise at high speed. The force of the air will help to keep mosquitos and other flying insects away.