Most people use ceiling fans in the summer, creating a downdraft that causes a wind-chill effect. The skin evaporates slight amounts of water from the sweat glands, providing cooling through the skin's surface. The air is only moved, not cooled so you want to turn the fan off when there are no people in the room. You may find you can lower your thermostat down a degree or two to save on energy costs.
Air settles in layers with the warmest air at the top of a room. In the winter, ceiling fans can run counterclockwise to redirect warm air from the ceiling down the walls and into living spaces where there are people.
Why Using a Ceiling Fan Pays Off in Winter
While it might seem counter intuitive, there are multiple reasons for using your ceiling fan in the winter … because warm air rises, and it won't do you much good up at the ceiling. This is why many heating systems deliver warmed air at floor level, so you get the benefit as the warm air rises.
- A ceiling fan can take the warmed air collecting near your ceiling and push it back down along the walls creating a more evenly heated room so you'll feel warmer.
- Your heating system won't have to run as long when the warmed air is returned and the thermostat shuts the furnace down sooner. For 16 foot ceilings and a thermostat set to 68 degrees, the uppermost 3 feet can be 90 degrees or higher before the heater shuts off wasting a lot of energy.
A general rule is to run the fan at a low speed so the warm air you want to move downward doesn’t cool off by the time it gets there. To test your fan, try both ways on the high setting. If you feel a breeze, this is the “summer setting”. In the winter, you will not feel any air being blown since the air is being pushed out and down the walls.
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PS Don't forget to clean the paddles on your ceiling fans once you climb up there, LOL!