Reply by jmos

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Posted on Why Do I Need Air Filtration?

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916 posts in 2817 days

#1 posted 10-29-2017 09:00 PM

I’ve got a good dust collection system (ClearVue 1800) and a ceiling mounted air filter (Powermatic) with Wynn filters. I always use the dust collector, but only turned on the air filter when I was doing things that I figured kicked up the most dust. I’ve been working this way for about 5 years.

I recently decided to buy a Dylos meter, with the extended lower particle size range, just to get some data on what was really going on. While I’m not going to argue it’s 100% accurate, I think it does give a good relative sense as to what’s going on.

What I discovered -

On the good side: The dust collector really does do a good job in most cases when I’m using my large equipment. When sanding, I use a homemade downdraft table and the dust port on my Porter Cable sander; I used to wear a respirator, but discovered that the dust levels were really quite low. I can also use the dust collector to filter general dust out of the air, as Loren mentions above, and it works pretty quickly.

On the bad side: Sweeping up REALLY kicks up dust; highest levels I ever see. However, just moving around in the shop working kicks up dust, and at high enough levels to worry about. I now run my air filter the entire time I’m in the shop, and it does help keep the dust level down. This surprised me, but was a good lesson.

So, my takeaway, capturing dust at the source is always best, but the ceiling mounted air filter is a worthwhile device and should be used.

-- John

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