There is quite a difference from dust /chip collection and an air scrubber/filter. You need both in most cases. You have posted an overhead scrubber similar to mine, I have the JET AFS1000B. It helps keep my basement 10x20 shop clean. I also sealed the room off from the living area as best I can. AND I do all really dirty cutting and routing either in an outside garage or with my Taper Shaper or CueMonster which each have a totally enclosed cabinet that get hooked up to a JET dust collector with 1 micron bags which is located in that same room with the overhead scrubber.
If I could mount my dust collector outside of my shop and draw the dust and chips out I would not need an overhead scrubber. No matter how fine the filters, and efficient the collector, you still have a hazard to contend with when you breathe submicron dust. I live in northern Ohio so an outside mounted dust collector is not practical. I would draw out all the heat and AC from my in house workshop and pay a ton in utility bills.
Any woodworking machine that makes a lot of wood dust needs a dust collector, not a shop vac. The much higher air flow rates are what keeps the area clean as the machine churns out huge volumes of dust.
Yeah my "dirty room" that has the two Unique machines in it is small, that way I can contain the mess I make. That same room houses my Cuesmith deluxe and a wood lathe I use for shaft cleaning and repairs. I also have a 20x20 work area with a metal lathe and milling machines just outside the "dirty room". I do cleaner work along with gluing/assembly in that inhouse room. For that work my shop vac with a HEPA filter is sufficient. The larger outside garage area has another large metal lathe and cabinet saw, band saw, shaper, etc for doing initial cutting and turning round my stock, also for cutting and surface sanding inlay material. The garage has a larger JET dust collector with again 1 micron bags, that are "well seasoned". I just keep the dirty work in its place and the dust out of my life as best I can. Ideally work out doors, and even with all the safety equipment, still wear a respirator !
