What does the abbreviation CFM stand for?

What does the abbreviation CFM stand for?

• A. Cubic Foot per Minute
• B. Cubic Feet per Minute
• C. Cubic Feet per Second
• D. Cubic Meter per Minute

Answer: (B)

CFM is the rate at which air moves through a point in a system in one minute. It stands for Cubic Feet per Minute, the standard imperial unit for airflow in HVAC and refrigeration contexts. The plural form “feet” is used because it refers to a volume of air, not just a single cubic foot. Using the singular would be nonstandard for a rate of flow. Per second would be a different unit (Cubic Feet per Second), which describes a much larger rate and isn’t the typical sizing unit here. A metric alternative exists as Cubic Meters per Minute, but that uses different units. So the commonly accepted meaning is Cubic Feet per Minute.

CFM is the rate at which air moves through a point in a system in one minute. It stands for Cubic Feet per Minute, the standard imperial unit for airflow in HVAC and refrigeration contexts. The plural form “feet” is used because it refers to a volume of air, not just a single cubic foot. Using the singular would be nonstandard for a rate of flow. Per second would be a different unit (Cubic Feet per Second), which describes a much larger rate and isn’t the typical sizing unit here. A metric alternative exists as Cubic Meters per Minute, but that uses different units. So the commonly accepted meaning is Cubic Feet per Minute.