The capacity of an air scrubber is measured in Cubic Feet per Minute (CFM). To decide which is the best air scrubber or air purifier for you, you will have to consider the CFM needed for the size of your space.
How to calculate Cubic Feet Per Minute
One cubic foot is the equivalent measure of 12” x 12” x 12”, which means that one CFM would cover an area of that size in one minute.
1. Calculate your room's volume in cubic feet
2. Calculate the total cubic feet per hour
3. Convert to cubic feet per minute