How to Calculate CFM of a Filter

Calculating the CFM is a straightforward process that involves measuring the velocity of air volume. To do this, you need to know the length, width, and height (measured in feet) of the given space, as well as how many air changes are required per hour. If you need help, you can contact the UAF engineering department. CFM or cubic feet per minute is the most common way to measure air flow.

It is the amount of air that an air purifying system filters in a room. The measurement is, in cubic feet, the volume of air movement at a given point in one minute. The higher the CFM, the more air an air purifier can filter in a room. To make sure you get an accurate CFM measurement, you can use our air flow calculator to estimate the pressure drop based on dimensions and air velocity.

This will help you get an accurate CFM measurement for your space.