CFM is a way of saying ft3/min, or cubi feet per minute. It is a
measure of the volume of air a fan can move in a minute. Generally
speaking, the higher the CFM, the more powerful a fan it is. Or, if
you happen to be in the aircraft industry, CFM refers to the
company CFM International, a 50-50 joint venture between General
Electric of the United States and Snecma in France.