There are some basic rules of thumb for determining the right size ceiling fan for a given space, although lots of variables must also be considered. Rarely is a space wide open, without dividers, racking, furniture or other obstructions. However, the following guidelines are a good place to start:
For most industrial and commercial large-diameter ceiling fans:
The square footage of the space in which a fan is going should be 5-7 times the diameter of the fan. In other words, a 14-ft fan (measured from tip to tip at its widest point) would cover an area of at least 4,900 square feet. (That’s 5x14=70; 70x70=4,900.) The largest industrial ceiling fan made is 24 feet tip to tip; it would cover approximately 14,400 square feet. (24tx5=120x120=14,400.)
The fan tips must be 2 feet away from any ceiling obstructions or features, such as lights, trusses, beams or disco balls.
There should be enough distance between the ceiling and the fan that the fan doesn’t “suffocate” and has adequate space above it. This is generally 5-7 feet from the ceiling, depending on the fan’s diameter.
The fan should spin from 10 to 24 feet from the ground — often this recommendation is stated as the fan should spin its diameter above the floor.
Although these guidelines can provide a rough idea, larger commercial and industrial spaces have many variables. Please give us a call at 877-244-3267 or drop us a line to get a custom sizing recommendation from a Big Ass expert.