First, calculate the total square footage of the room by multiplying its length by its width (Length × Width = Square Footage). If the room is L-shaped, divide it into two rectangles, calculate each, and add them together.
The "blade span" (or sweep) is the diameter of the circle created when the fan is spinning. Use this chart as a general guide: How to Choose a Ceiling Fan Size & Style
Choosing the right ceiling fan size is critical for both comfort and efficiency. A fan that is too small won't move enough air, while one that is too large can create a noisy "wind tunnel" effect or overwhelm the room's design.
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