Maybe I'm wrong, and I hope I am. But, for some reason I don't think people are comfortable with this post. I have very little dust, due to my tending proceedures. Like others have said; if in a big hurry, and sloppy = more dust. Personally, I have one door open to a time on the stove. Air is being drawn in the open door. No fly ash comes out of the stove. Because my stove is a top feed, I dump a 5 gallon pail of coal in the top. The coal dust follows the coal, due to also being drawn in. I made an ash tote(box), with a piano hinged lid. I empty the ash pan into the ash box, and quickly close the lid. All the while, the shop vac is running in close proximity to the ash. Very little, if any fly ash escapes. One more tip; I shake down my ashes, and let them cool till next tending time. The ash pan is much cooler to handle, as well as no hot air currents carrying the fly ash around. If my stove was in the living quarters, I'd have a cover for the ash pan. Or maybe a shop vac with metal canister, piped up to the stove.