was asked by fellow Creeker Brad Beam to post pictures of how I constructed
my under-the-floor dust collection system. I have posted it before but maybe it cannot be seen because it has been so long. So here it is again. The system was designed by Oneida Air by sending all my machines and their sizes to them. I have a 3 hp industrial cyclone that sits in a utility
room that has an 8” inlet. The duct work goes from 8” down to 7”, then
to 6” and finally to 5”. All the duct work is under the concrete floor with 11 “duct ports” that come up through the floor. Four of them come up in the middle of the floor for machines like my table saw, WBS, shaper and bandsaw. For these there I also ran conduit and the appropriate size wire for that machine. There is a cover and a hole cut just big enough for the size pipe to come through and a 3/8” hole for a pigtail for electrical. All this is cover with pea fill and then concrete. The system is turned on with a car key size remote. I have had this system for about 4 years now and it has worked flawlessly. Some have said, “What do you do or what if you have a clog below the floor”? I have not yet and I am not worried about it. If it ever happens I run a snake through the line. Oh, the duct pipe is very heavy gauge spiral that is coated with PVC inside and out. Oneida did not supply this but I got it at a local HVAC supplier. I can not remember what I paid for the duct pipe, but as I recall it was not the cheapest. I hope this helps you Brad and any others that this might help.
Dave