Thread: Interesting Concept

What does it mean? - SFA actually.

After all that phaphing about he manages to conclude

My shopvac, it turns out, emits a lot of dust. It only has one of those disposable paper filter bags in it. I guess those paper filter bags are not very good, considering how much dust was in the air after using it for just a few minutes. I also checked the dust coming out of a shopvac using a pleated cartridge filter, and that was much less dust.

He's done some interesting projects but he doesn't know much about dust.