Grinder dust collection - a few questions

[Julius Schmidt]

The AC400 is a good unit and probably is why you don't have settling dust.

But the AC400 is outside of the cabin and there is no settling dust inside of the cabin. The reason my set up works is because my cabin is almost tightly sealed and the suction from outside of the cabin creates underpressure (partial vacuum) inside the cabin and the entire air is replaced every few minutes and with it all the particles in the air. My vac sucks 3.7 cubic meter per minute and my cabin has 5.2 cubic meter. If the very fine particles are fine enough to be airborne they also get sucked up by the system without any problem.