air filter; a machine you mean?
don't those add an electric current to dust etc. ? If so, won't that be more dangerous for your computer than dust itself?
Yes, I was talking about the machine. It will not damage the PC in any way (unless you physically put it INSIDE the PC case). If you just leave it in a corner a few feet away from the PC you'll be fine. I have been using one for about 2 years now and it works well.