When it comes to choosing a ceiling fan, it's largely a matter of personal preference. But there is one thing you should keep in mind. You need to match the size of the fan to the size of the room. For example, if your room is 10 by 10, you'll need a three foot fan, if it's 15 by 15, a four footer should be about right, and if its 25 by 25, you'll need something that's up to five feet in diameter.
Ceiling fans are designed to rotate in both directions, in the summer, set your fan to blow air downwards, the wind chill effect could make you feel as much as eight degrees cooler and you can cut your air-conditioning cost by as much as forty percent.
In the winter, reverse your fan to pull air upward. That'll displace hot air that's collected near the ceiling, and push it back down into the living area saving up to ten percent on your heating bill.
Often, a normal ceiling box isn't strong enough to support a rotating fan. If you have any doubts about yours, you can easily replace it with a brace box. It actually wedges between the ceiling joints and keeps the fan securely in place.