I got a super deal on a harbor freight 2 hp dust collector, a guy on craigslist had one advertised that I got. It's about 10 years old but never used still in the box with the accessory kit. Got it all for $100
I put it together yesterday and built a thien baffle for it. After reading everything I could, I pretty much determined it should have it.
I've been reading about dust collecting to try to answer some of my questions about duct size...
There's Cubic feet per minute as well as velocity, I don't want to go to big and have dusty ducts where the dust just settles in the pipe. Also the larger the duct the more expensive.
I'm planning on locating the DC in a separate area and possibly venting it outside and removing the filter bag all together.
Therefore my questions
What size duct for the runs?
What size duct for the exhaust to the outside world?
Metal or schedule 20 PVC?