From reading the various links and tech articles published and shown in several discussions here, my take away are these:
1) The deadly dust is VERY small, typically invisible, and stirred up easily by walking in the shop, etc.
2) Venting the D/C outside is the only smart solution; this is what industry has been doing for generations, because it is effective. The small dust is immediately neutralized and eventually dropped to the ground once it attaches itself to water molecules, so the danger is mitigated.
3) Trying to filter down to the micron levels with the D/C in the same space and related necessary air flow requirements is unattainable within both reasonable budgets and machinery /space required for a home shop.
4) The argument about heating and cooling losses are irrelevant in the context of this conversation IMO. Much easier to deal with that than to continue to inhale poisons. I live in Canada and am forced to heat my partially insulated garage with electric heat all winter, adds about $100/month to the bill, but ask me if that changes anything. In summer I sweat my balls off, but cooling fans help, altho that is obviously only good if the place is clean.
5) Wearing a respirator is obviously paramount, but impractical, and no one is going to religiously do it, especially since it adds to fogging of safety glasses etc.
My current small 2.5" D/C build is going to get fired up today - I have decided to either run the shop vac outside of the garage (best solution) or at least vent it outside (not so good, but better than running inside). Once this is rolling, and the car gets some attention, I will connect the 4/5" D/C located in the shed and see how this all goes. Will likely need to build/cut in a larger vent intake window so there is crossflow to balance the outlet suction. Planning on running a slightly open permanent intake so the D/C can clean the air constantly. Open garage door may be the solution in the beginning.
a 16 year old hooligan stuck in a 55 year old's carcass
Last edited by tulowd; 05-04-2019 at 12:56 PM.