Hi Everyone. So, over the holidays I had a little spare time and started cleaning the shop in earnest. It's really two rooms; one is a "clean" or assembly room and the other is what I'm talking about here, which is where all the tools are. Pic posted. So I realized as I was cleaning the pounds of fine dust that a) my dust collector isn't cutting it and, b) I quit smoking for a reason and don't want to swap one carcinogen for another Anyway, that led to my researching until my eyes glazed over and my head hurt. Bill Pentz would wash his hands in exasperation because, although I've read and read, the practical application isn't sinking in. What has, however, is this: I'm ditching what I have and redoing. Currently I have a Grizzly cyclone with 4" PVC piping and flex hose machine couplings; a couple of Shop Fox fine particle filters and a larger Shop Fox hanging air cleaner. That I'm keeping. The smaller ones I moved to where I paint. I think that, for me, I'd like to have a system that simply exhausts the fines to the outside and that captures the chunkier stuff before it gets to the impeller. In other words, really no filtering. The nearest neighbor is over 140 yards away on any side and there's nobody to be bothered by the particulate. Also, I'm out in an area where there are no ordinances against the discharge. And, the shop, although connected to the house, is not conditioned and I would seal the doors to prevent pulling conditioned air out of the house. A make up air vent in the outside wall would seem to do the job; I'm in south Louisiana and temps are fine year-round. I want to go up to 5 hp but single phase, with 6" or possibly 8" main piping with reducers only at the machines that are ported for 4". So I'd put a reducer on the end of each drop to minimize any 4" bottlenecks. Also, I will be investing in automatic blast gates and using metal duct. I drew up a rough plan showing a rough idea. I did forget to include a floor sweep in the drawing but would probably like to have one at each end of the shop. Any opinion, expertise, or practical assistance would be most appreciated. For example, WHERE do I find a large impeller and housing, etc. Bill Pentz' site points to electricmotorwarehouse.com, which has a very nice Leeson for this purpose. I have buddies that do electrical for a living so the wiring isn't an issue. For me, it's gathering the parts and knowing how to proceed to assemble, etc. Thanks!