Airflow cluster
CFM per Square Foot Calculator
Calculate an airflow-to-area ratio.
How to use
Enter total area and the associated airflow.
Formula
CFM/ft² = CFM ÷ area
Variables
The ratio does not replace a room-volume or code-based calculation.
Example
240 CFM over 300 ft² equals 0.8 CFM/ft².
Result interpretation
Ceiling height and ventilation purpose still matter.
FAQ
Can this size a system?
No. Use a project-specific design method.