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.
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Probably talking about a flowrate. This is a common unit of measure when talking about airflow from a fan. CFM = cubic feet per minute.
Cubic Feet per Minute (CFM). A measure of how much air moves in a minute, measured in cubic feet (the amount of air which fits inside a box 1 foot wide, one foot high, and one foot long). Most vacuums and fans are rated in terms of CFM. It tells how much air gets moved in a given length of time. More CFM is usually better, but it usually comes at the cost of more noise.
the throttle body is rated at 330 cfm
2200 cfm
Cmh = cubic meters per hour cfm = cubic feet per minute m3/hr * 35.3ft3/m3 * hr/60minutes = ft3/minute So, 1 cmh = 0.5883 cfm
1. ASSUMING AIR DENSITY AND FAN BLADE DIAMETER IS CONSTANT OR THE SAME --THE LATTER (1750 RPM) DELIVERS MORE CFM WHETHER BELT DRIVEN OR DIRECT COUPLED -- SAME HP RATING OF MOTOR. 2. 1250 RPM FAN CAN MATCH THE CFM OF 1750 RPM FAN --- CHANGE OR ADJUST THE PITCH OF 1250 RPM FAN BLADE. 3. 1250 RPM FAN CAN DELIVER MORE CFM THAN THE 1750 RPM FAN --- REPLACE FAN BLADE. 4. 1250 RPM FAN CAN DELIVER MORE CFM THAN THE 1750 RPM FAN --- REPLACE WITH BIGGER HORSE POWER.