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My outside-exhausting DC w/ baffle
I just finished setting my DC up to exhaust outside, so here's some pics.
Inside the grarag...*cough*cough* shop, there's 6" ASTM 2729 pipe to each tool. The pipe was just fitted together, and screwed through the fittings (no glue), so I can take it apart and re-arrange later (if wanted).
The main line goes through the "floor" into the crawlspace below the house. There, it's sucked into a 2HP Griz collector. I modified it by adding a Thien baffle below the existing input port, and by mounting a 6" piece of PVC to the top "outlet" (where the top bag would usually sit).
From there, the exhaust runs through another piece of 6" PVC to the wall of the crawlspace, where it goes through the wall, and vents outside the house.
I had to use 90* fittings on the exhaust because there wasn't room for 2 45*'s.
The Thien baffle is excellent. If you look at the last pic (showing the outlet on the side of the house), you'll see there's no dust on the rocks below (well, there's a little, but it's from sawing the 6" hole!). It all stays in the bag.
I'm going to replace the bottom bag with a plastic one, just so I don't end up with a fine layer of dust on everything in the crawlspace.
I'm also going to re-arrange the connections on the DC so that it hits the baffle/bag BEFORE the impeller, just incase I suck up any nails.