6 inch flanged exhaust port

I added a flange to DRandolph's design to make it easier to mount to my laser-cut window vent for the output of my dust filter. Note that you are supposed to have a secondary filter to catch the charcoal dust between the laser's filter and your window vent if you want to not pollute your local air.

I didn't have any machine screws laying around, so I made rectangular holes for affixing with zip-ties. The fit is a little loose on my lasercut hole but I just added a little gaff to tighten it