The only time I had a problem, and that is what prompted me to buy a good mask, I salvaged a piece of cheap luan plywood out of our motorhome when I was redoing the bedroom in it. I was using the plywood to practice on with the practice patterns from one of my first books. I sat hunkered over my saw for a couple of hours cutting and sucking in all the dust. The next day, I woke up with a severe headache and I was plugged up solid in both nostrils. So, I learned early on that a good mask was a necessity. I also bought a 20 inch box fan and a package of 4 cheap furnace filters. Those two things really helped. Since then, I have put a good dust collection system on my Dewalt and I'm designing one for my EX. The Wen air cleaner helps a lot too.