If not effectively managed, dust made from woodworking projects can be a hassle to employees, project time, and productivity. Depending on how fine of a dust you’d like to filter, you can buy HEPA furnace filters for the pre-filter (though this can slow down the overall CFM through the filter), or washable/reusable filters , or even charcoal filters to remove organic vapor from the despite the versatility and convenience of using an air filter, it certainly shouldn’t be relied upon as a woodworker’s only line of defense against wood dust.
Some vacs have an auto-on feature to work with a sander or other small tool to kick on when the tool is switch on. In most instances, the tool is actually plugged directly into the advantage to this method is that it can be very precise, so that even though only a moderate amount of suction is created with the vac, it is in just the right place for optimum dust extraction.
They usually use 4″ dust collection hose , and will filter large chips and dust from a variety of woodworking beauty of a dust collector is that they are designed to create a lot of CFMs of suction, and unlike shop vacs which use a small internal filter, dust collectors use a giant bag (or a canister ) and almost never lose any suction with continued use.
This is essentially a giant vortex-shaped pre-filter piece that allows larger chunks of wood to drop and fall into a trash can or other large container: prolonging the life of the dust collector’s bag and greatly reducing the frequency that you have to empty it. Bill Pentz has written and studied wood dust safety and cyclone dust collectors extensively, and is his website is a recommended resource for those wanting a thorough defense against wood dust.
I bought a shop full of used Nordfab ductwork years ago, and am still using up the last bits of it. It makes this ritual much easier. The cyclonic collection system works very well on the high velocity vacuum systems (and you can make one yourself pretty easily). You’d have to be making several inch long ones in the pipe you have for the wire to work. These cartridge respirators are a great choice when applying wood finishes in enclosed areas, especially during winter months when ventilation can be difficult.