Shop Fan/Air Filter

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Project by Knightrider posted 06-22-2015 09:41 AM 104541 views 27 times favorited 18 comments Add to Favorites Watch

I decided to try to improve my shop air quality (on a budget), and I fully admit to spending way too much time on this, but I was having fun!

Case and stand are made from scraps of plywood, pine and 2 X 4, with some Masonite for accent pieces. Fan parts came from a box fan I had laying around. Knobs were made on my router pantograph.

I intended to put an electronic timer like I used on my drill cabinet, but I was feeling cheap, so I decided to use a mechanical timer that I already had.

Thanks for looking.

-- Chris Knight

18 comments so far

View recycle1943's profile


4958 posts in 2598 days

#1 posted 06-22-2015 09:53 AM

That looks like a 5 micron filter, cant get too much more than that and besides, filtering is a good thing

-- Dick, Malvern Ohio - my biggest fear is that when I die, my wife sells my toys for what I told her I paid for them

View michelletwo's profile


2789 posts in 3992 days

#2 posted 06-22-2015 10:40 AM

nice build, what impresses me the most is your little wood knobs! (for the rotation)

View Jim Jakosh's profile

Jim Jakosh

25762 posts in 4082 days

#3 posted 06-22-2015 11:23 AM

That’s a great idea, Chris. Nice project. I have a fan that looks exactly like that one and I am constantly moving it around to find a flat spot to set it on for cooling in the shop. Thanks for the idea!!!!!!!!!!!!

Cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Oldtool's profile


3158 posts in 3167 days

#4 posted 06-22-2015 12:07 PM

Cool idea! Sorry, had to say that.
Nice work.

-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln

View  woodshaver Tony C   's profile

woodshaver Tony C

7833 posts in 4329 days

#5 posted 06-22-2015 12:44 PM

Nicely done Chris! I like the idea that you can tilt it and that it’s at work bench height so you can bring it closer to your dust maker.

-- St Augustine FL, Experience is the sum of our mistakes!

View WoodNSawdust's profile


1417 posts in 2153 days

#6 posted 06-22-2015 12:50 PM

Nice design. How did the filter affect the airflow?

-- "I love it when a plan comes together" John "Hannibal" Smith

View Knightrider's profile


74 posts in 2283 days

#7 posted 06-22-2015 02:17 PM

Thanks everybody!

Woodnsawdust – the airflow is definitely reduced considerably with the 5 micron filter… Much better airflow with a cheap filter, so I’ll need to experiment as to which is more effective – better filtration with less airflow or better air flow with less filtration!

-- Chris Knight

View Pointer's profile


463 posts in 2087 days

#8 posted 06-22-2015 02:20 PM

Very useful item. I too like the height and its ability to tilt. Certainly nicer looking and more functional than duck taping a filter onto a box fan. Not saying I do that. :)

-- Joe - I am not entirely worthless, I can always serve as a bad example.

View ChipByrd's profile


160 posts in 2903 days

#9 posted 06-22-2015 08:05 PM

That’s a great idea! BTW, I am in Holland.

View Woodwrecker's profile


4240 posts in 4552 days

#10 posted 06-22-2015 09:19 PM

Nice job Chris.
That came out great !

View AZWoody's profile


1478 posts in 2200 days

#11 posted 06-22-2015 09:40 PM

I really like the tilting aspect. Great job.

As for the filtration, I would go for more filtration over air flow. If you get more airflow, all you’re doing is spreading the finer particles around more to where you’ll be breathing them.

Now that you’ve made one of these, you could easily make a couple others faster now and could place them strategically around your shop to have some nice circulation going.

View jeff's profile


1289 posts in 4441 days

#12 posted 06-22-2015 11:51 PM

Very nice project.I really like how you made it mobile.

-- Jeff,Tucson,Az.

View Mean_Dean's profile


7057 posts in 4123 days

#13 posted 06-23-2015 12:08 AM

This is a great idea—may have to add to my “to-do” list!

Question, though: Is 5 microns enough filtration? If I’m remembering right, we’re supposed to be shooting for 1 micron?

-- Dean -- "Don't give up the ship -- fight her 'till she sinks!" Capt James Lawrence USN

View CB_Cohick's profile


493 posts in 2227 days

#14 posted 06-23-2015 02:29 PM

I like your idea of removing the grate on the back of the fan. I will incorporate that into mine next time I take it apart.

-- Chris - Would work, but I'm too busy reading about woodwork.

View timbertailor's profile


1594 posts in 2400 days

#15 posted 06-23-2015 05:14 PM

Question, though: Is 5 microns enough filtration? If I m remembering right, we re supposed to be shooting for 1 micron?

- Mean_Dean

No. 0.5micron is even better. Otherwise, they just become dust generators recirculating the really hazardous, fine particles.

-- Brad, Texas,

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