If you are serious about it then an air filter as a secondary system is a must. e.g. the Record AC400 Two Stage Air Filter which filters down to 1 micron, the smaller it is the worse it is, you seldom get anyone having breathing issues with shavings! One problem with high pressure systems is it is hard for the filter to be effective and not squirt fine dust back into the atmosphere, though many domestic systems now have a 5 micron filter option this is often in the form of a bag for the dust collection so gets expensive over time.
Bottom line is you need to go low end commercial which looks expensive, but over a 2 year period pays for itself in running costs. My extraction is to a 30 micron bag, but that is outside the workshop in an extension shed with a passive pressure feed back through a 5 micron filter to prevent all my heating getting pumped outside. backed up with a 1 micron air filter that mostly cleans the air in the hour after I leave the workshop so I don't need PPE before I go in next morning.
Is it perfect? of course not, it will never be perfect but its the best I can do.