Formula
CFM = room volume × ACH ÷ 60
Steps
- Calculate room volume in ft³.
- Use a project-specific ACH target.
- Divide the hourly volume by 60.
Example
A 2,400 ft³ room at 6 ACH needs 240 CFM.
FAQ
Can this replace a ventilation design?
No. It is a simplified volumetric calculation.