There are a few things you need to consider when purchasing a ceiling fan for a 200 sq ft room. The size of the room, the height of the ceilings, and the type of climate are all important factors. The most important factor is the size of the room.

A ceiling fan that is too small will not be able to move enough air to cool the room, and a ceiling fan that is too large will be wasteful and unnecessary. The next thing to consider is the height of your ceilings. If you have high ceilings, you will need a longer downrod to properly circulate air in the room.

Lastly, you need to take into account what kind of climate you live in. If you live in a hot climate, you will want a ceiling fan with a higher CFM (cubic feet per minute) rating so that it can move more air and keep you cool.

There’s no definitive answer to this question as it depends on a number of factors, including the height of your ceilings and the layout of your room. However, as a general rule of thumb, you should choose a ceiling fan that’s at least 36 inches in diameter for a room that’s 200 square feet or less. If you have higher ceilings or a larger room, you may need a bigger fan.