Q. I read your article about ceiling fans, and agreewholeheartedly about their use all season long. However, one of thethings I've been puzzled about is which direction should the bladesbe moving to push warm air downwards (for winter) and vice versa?Should they rotate clockwise (looking up at them) orcounterclockwise?
A. When the leading edge of the fan blade is lower than thetrailing edge, air moves upward (winter position). When the leadingedge of the blade is higher, the air moves downward. In the summeryou want the fan to blow air directly downward. This position coolsthose beneath.
During the winter, you want air to blow upward toward the ceiling.This causes the hot air above to blow across the ceiling and down thewalls. Warm air circulates throughout the room and absorbscondensation from windows and glass doors. This improves energy-efficiency and reduces mildew at window sills.
AP
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