I bought a machine in January and found myself in a similar situation. The only place in my basement available was directly beneath my wife’s 1st floor work from home desk. After contemplating enclosures i decided to build 2 full walls and ceiling to box in the foundation corner. 2x4 studs with 5/8 drywall both sides on a cement footer for walls, same for ceiling while trying to keep it as isolated as possible from the existing joists. Filled the gaps at ends of walls/foundation and ceiling/foundation with lots of type s mortar, and encased 2 lengths of 2” pvc pipe thru the wall for shop vac exhaust and fresh air intake. Insulated with rock wool insulation, sealed all of the gaps with silicone as I built my way from the inside out. Built a door out of the same. Put all of my remaining insulation above the booth ceiling between the existing joists. Foam tape seal around the inside of the door, and the room is pretty much airtight. Variable speed router control on the shop vac let’s me cut it down to 50% power, which is still well above the 50cfm required for my dust deputy to separate out the dust effectively. The vac is now only slightly louder than a hairdryer. According to some random decibel meter app, a 90 decibel sound inside the room with the door closed registers at about 65 decibels outside the room in my basement, and merely 38 decibels at my wife’s desk only 8-10 feet above the machine. I have a 1.5kw 65mm liquid cooled spindle and vfd here, so I’m not concerned about the noise at all. I’m going to actually pipe the shop vac exhaust out of the window so it might even get a little quieter when I do that. I build the room as wide as a 48” piece of drywall to minimize the amount of material I’d need, and the machine will fit just right in there. I envisioned a drag chain or 2 in there but I may have to see exactly how much room I have. Just waiting for the machine to get here…
