Health How many CFM should a dust collector have? How many CFM should a dust collector have? They found most small shop stationary tools need about 1000 cubic feet per minute (CFM) of airflow to have good fine dust collection and only need about 350 CFM for good "chip collection". Related Posts:How many CFM do I need for a 8x10 bathroom?Which type of exhaust fan is best for kitchen?How to calculate cfm for range hood - all you should knowWhat is the highest cfm compressor?