Originally Posted by
David L Morse
I'm puzzled by your mix of 6" and 5" for the horizontal runs. I hope you're planning to use blast gates, that DC would be nearly useless with all those ports open.
For your high flow requirement tools like the lathe, RAS and what looks like it could be a MS at the bottom I would consider 6" drops. Your main concern at those tools should be capturing as much fine dust a possible so 6" ports in your hoods with bell mouth entry. You really need maximum CFM here.
You have only a 4" pipe for your TS. Why not 6" under the slab? Will you be taking both cabinet and topside from this pipe or will you have a takeoff from the main for topside? If you're only using the buried pipe for the cabinet and the blade is shrouded then 4" is probably ok.
He's using 6" main duct and 5" drops...something I mentioned earlier in the thread. The 4" in the slab is already in the slab. He's not installing it new...at least that's how I read things earlier.
As an aside, the lathe isn't a target for high flow since one cannot effectively collect from a lathe during cutting; only during sanding. That's also a good location for a floor sweep...once he has a cyclone, but not with a single stage setup.
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The most expensive tool is the one you buy "cheaply" and often...