CFM Per Room Calculator
Calculate required CFM for a room based on air changes per hour. Free, instant.
How to Use CFM Per Room Calculator
1
Enter room dimensions.
2
Enter desired air changes per hour.
3
Get required CFM.
Frequently Asked Questions
How many air changes for different rooms?
Offices: 4–6 ACH, kitchens: 15–20 ACH, bathrooms: 8–10 ACH.