In the summer, run the blades downward to create a cool breeze. If you raise your thermostat by only two degrees and use your ceiling fan, you can lower air conditioning costs by up to 14% over the course of the cooling season. And remember: Ceiling fans cool only people, not the room, so when you leave the room, turn the ceiling fan off.
In the winter, your ceiling fan can help improve your comfort. Most fans have a switch that allows you to reverse the motor and operate the ceiling fan at a low speed in the opposite direction. This produces a gentle updraft, which forces warm air near the ceiling down into the living space.