Question 1

What is grow tent CFM?

Accepted Answer

CFM (Cubic Feet per Minute) measures the volume of airflow an exhaust fan moves. A grow tent requires enough CFM to replace the air volume once every minute.

Question 2

How does a carbon filter affect required CFM?

Accepted Answer

A carbon filter adds static pressure resistance, which restricts airflow. To compensate, increase your required exhaust fan CFM rating by 25%.