Dust into the house from the shop is a very definite thing. I was polluting the house with sawdust and small wood chips. I tried vacuuming my clothes and shedding my shoes. The problem stopped.
I no longer shed the shoes. I do wipe them thoroughly on a mat. Now, once-in-a-while, I shed a small chip.
What I do with my clothes depends on what I was doing with wood. If I was table sawing, sanding, or causing major disturbance to wood, I give my clothes a really good shaking, batting, brushing. I do have a reasonable dust collecting system. I have shown pics of it and described it in quite a few threads and posts. I would not dream of doing woodwork without it.
As the dust collection system developed, the need for radical clothes shaking has almost vanished. The thing that makes me the greatest chip carrier is the wood lathe. I can seem to corral all or almost all of the fine dust at the lathe. However, some of the hard stuff coming off of the wood can have enough mass and velocity to get past the air intakes and onto my clothes. This is the place where more horse power would pay off.
I paid attention to all of the rules for running ducts (hard plumbing, as little flex ducting as possible, no sharp turns, etc.) and that is what makes my system work so well. However, the laws of physics say that it takes a certain amount of energy to make a moving object change its path. You can change the path of the fine dust easily. As the mass increases it becomes more difficult. If the mass is enough you cannot capture it. The same type of thing happens with the amount of air you are taking into your DC pick-up. The greater the volume of air you move at a given speed, the heavier the particle that you can convince to come into your DC. Etc.
I hope this helped.
Enjoy,
JimB