Though ceiling fans are most associated with warm-weather seasons, most can be effective throughout the winter months as well, helping circulate warm air throughout a room in much the same way they circulate cool air during the warmer weather. Most of today's fans have a switch near the motor housing that alters the direction in which the fan's blades turn.

When a ceiling fan is used in the summer, its blades push the air downward, moving cool air around the room. The air blowing around the room is what cools people within the room. When the blades' direction is altered, the blades then push the air upward toward the ceiling. This drives the hot air, which typically rises to the top, down toward the edges of the room. This helps circulate warm air throughout a room, making for more even heating. What's more, this improved heat circulation helps combat window sweating that results from condensation on the glass when hot air is not effectively circulated throughout a home.

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