filtration, finally

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Project by ncdon posted 04-25-2012 07:25 PM 2162 views 6 times favorited 5 comments Add to Favorites Watch

I used an existing shop storage cabinet to create my filtration unit. I use 3 filters back to back. The outer most
filter is just a common furnace dust filter, the second a washable sponge type the the inner filter is a high performance filter which is suppose to pull 90% of .03 micron dust. Since my blower is huge and I’m in a steel Building, ceiling mounting it was out of the question. I’m returning the air to the shop via a duct system, still working on that.
I’ve had it up and running now for a couple of weeks and man what a difference it makes.
I should have done this years ago.

-- Don, North Carolina, Working full time at retired.

5 comments so far

View jackthelab's profile


313 posts in 4033 days

#1 posted 04-25-2012 08:13 PM


Like the design – I have a similar building type of situation and the ceiling mount won’t work for me. Thanks for sharing the design – will work on one soon.

-- Dave in Minnesota - If it ain't broke, improve it!

View Enoelf's profile


192 posts in 3603 days

#2 posted 04-26-2012 12:58 PM

That’s a neat idea! I have always wondered how noisy these types of filter boxes are. Just added this one to my favorites!
Thanks for sharing.
Well done.

-- Central Ohio, Still got 9 and 15/16 fingers!

View dlmckirdy's profile


199 posts in 4473 days

#3 posted 04-26-2012 05:45 PM

How do you think the performance compares to a high mounted filter? I have often wondered if a low mounted filter might collect more of the dust particles, as they are heavier than air and ultimately settle.

Are the return ducts outlets just above the working height, or are they all the way up to the ceiling?
How may CFM is the blower?

Good job!

-- Doug, Bakersfield, CA - I measured twice, cut it twice, and it is still too short!

View ncdon's profile


220 posts in 4216 days

#4 posted 04-26-2012 10:01 PM

Enoelf. Most of my noise is coming from my discharge ducting, I know that I’ll have to end up enlarging that ducting. I’m presently using some 3 inch pvc I had left from another project. Looks like I’ll need 6 inch and will probably go metal.
Dimckirdy, You know I can’t say if low is better, never having had a ceiling mount unit. after operating for a couple of weeks my outer filter is dirty so its doing some thing. I also don’t have dust accumulating on horizontal surfaces as before. I am running my return duct high, when finished it will extend about 1/2 way around the shop.
I’m running the blower on low and the name tag says 650 cfm on low

-- Don, North Carolina, Working full time at retired.

View Warren's profile


81 posts in 3675 days

#5 posted 04-29-2012 12:06 PM

very nice I have a smaller version of that in my shop I mounted it close to the ceiling. Thats a good idea of using more than one filter at a time. Think when my hip heals I will reconfigurate the one I made to accomodate more than just the one filter. Right now Im just using cheap furnace filters. It does ok but with your idea I think it will do better. :) Thanks for posting this :)

-- Warren, Cambridge,OH.

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