You can potentially save up to 15% on your energy bill by "winterizing" your ceiling fan — aka simply switching the direction it spins in. Blades are angled, so in the summer, running counter-clockwise will push air down. In the winter, the fan should run clockwise, thereby drawing colder air up.
uhmm...no, it doesn't work like that
fan has not enough pull power to suck the colder air from floor level, you need to force warm air that is stored on ceiling level down so it mixes with the colder
that is much more efficient way of heating up large air volumes