A large ceiling fan can give you the airflow and movement you need to keep your rooms cool. With a large fan, you can also use it to force air through areas where there isn't much natural light, such as closets and corners in your office. You can also use a large ceiling fan in places where there is already lots of natural light, like at a window or door that faces the sun all day long. Large ceiling fans are great for rooms with large ceilings, as they allow you to place your fan directly above the surface of the ceiling. This is an effective way to circulate air in a room and reduce the amount of heat that rises into the room.