I have a laser CNC, which has a built-in fan that is not quite strong enough to move both the smell and the particles out the exhaust system. I bought a pretty cheap dryer-vent blower fan and added it to the exhaust tube. With the addition of this fan, the particles and odor are sucked out sufficiently. Previously the smell of cut particle board and acrylic were so bad, I considered returning the machine.

The business-end of the exhaust tube sits outside a window, and has a reservoir for collecting debris that make it through the tubing--seems to also subdue the odor.