I have a Jet air cleaner in my garage that does a great job of getting rid of suspended dust particles quickly. It looks to be about the same size as that one. My garage is about 20 x 20 and the air cleaner is in the middle. If the dust has to travel past you to get to the cleaner, You will still get a lungfull. I try to set it up so that when I am sanding, my back is not towards the air cleaner. This is not always possible so I always wear the respirator. I can take it off much sooner when the air cleaner is on.
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