In reading your review of the Grizzly HEPA-Rated Air Cleaners in Issue #303, you have raised concerns about pulling the dust into the breathing zone when using ceiling hung dust collection systems. Since I already have a non-HEPA system installed, I was wondering if it would make sense to relocate the unit below counter height and pull the dust below the breathing zone. I am wondering if this would be better than leaving the system hanging from the ceiling and how effective you might feel that it would be.
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I went and found the article, more of a new tool announcement, and it reads like marketing-speak... but it does have a common sense "reality" to it.
Then I went to the griz site and looked at a few non HEPA and HEPA units and that language was not there. My take away is that having any filter unit running in the "breathing zone" is a plus, with better filtration having advantages.
A curious thought to add filtration down low, but the finest dust will stay airborne while you're in the shop anyway. I suppose you could try to gauge how much settles on the tablesaw with each setup.
Designing a useful test is an interesting idea.