I have a 18x22 shop with a Jet AFS-1000B filter with the Wynn internal filter and a Home Depot outer filter. I also have a Jet JCDC-3 dust collector. I also have a Dylos air quality monitor that measures down to .3 microns. When I pollute the air with small particles there Jet air filter removes them down to a safe level in about 10 minutes. I can tell you from experience that the Jet air filter works. Collecting at the machine is not 100% even if you have a great dust collection system. Shaving a piece on the table saw will really spit out a lot of small particles. Small particles stay in the air for a very long time.
Michael Dilday
Suffolk, Va.