Shop made air filter

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Project by povertyridge posted 02-12-2013 12:59 AM 93176 views 46 times favorited 16 comments Add to Favorites Watch

Like a lot of others on here I found this in an old issue of Shopnotes (the complete small shop 2011). I literally just finished. I can’t wait to use it! I got the blower for free and just took a sheet of 3/4” Birch, pack of 3 filters and a little time in the shop…............ Priceless!

-- --- Chad Franklin, IN ---

16 comments so far

View kdc68's profile


3078 posts in 3766 days

#1 posted 02-12-2013 01:29 AM

Nice work….great color scheme in your shop!

-- Measure "at least" twice and cut once

View David Dean's profile

David Dean

608 posts in 4389 days

#2 posted 02-12-2013 02:30 AM

great job one of them is a most have in the shop.

View Tym's profile


18 posts in 3456 days

#3 posted 02-12-2013 04:19 AM

I made a similar one last year. Its nice not having the sawdust in the air. One thing that I did to mine that you may want to look at is to change the on/off switch to a timer. That way you can leave the area while it cleans up and then goes off on its own. Great build though!

View AnthonyD's profile


21 posts in 3421 days

#4 posted 02-12-2013 04:40 AM

that is awesome!!!!

-- AJ DeSantis

View b2rtch's profile


4922 posts in 4538 days

#5 posted 02-12-2013 01:35 PM

I made one a few weeks ago and I have a timer and a four positions switch for the four speeds fan.
I used 20×25 filters and my last filter is MERV 15.
It makes a huge difference in my shop.

-- Bert

View toddbeaulieu's profile


868 posts in 4494 days

#6 posted 02-12-2013 03:47 PM

Nice Chad.

Did you work out the CFM? I was thinking of making one, but I couldn’t find any motors over 1,000 CFM. And what I did find was too expensive, especially considering I could get one of the common units at 1,400 CFM for around $350.

View mlp490's profile


4 posts in 3419 days

#7 posted 02-12-2013 05:16 PM

Great idea

View Tom Huntley's profile

Tom Huntley

58 posts in 4729 days

#8 posted 02-12-2013 06:54 PM

Perfect timing Chad! I have a friend in the HVAC business that just gave me a free fan, and now I’m doing some research on air cleaning systems. I found a place on line that sells the same type of heppa filters used in the Jet system for about half price. Figured I would use them in a box like yours. Really liked the other feedback too on timers, fan speeds etc. Thanks again to all. Would love to see a follow up report when your fire yours up. It looks terrific!

-- Tom Huntley - Rochester Hills, Michigan

View rlamb007's profile


76 posts in 4027 days

#9 posted 02-12-2013 09:39 PM

Great Job – I am sure that will make a nice difference in the shop. Where did you get the blower?

View ROBZ71LM7's profile


11 posts in 3708 days

#10 posted 02-13-2013 12:07 AM

I would suggest putting your connections (wire nuts) inside a metal junction box mounted inside the filter box.

View povertyridge's profile


44 posts in 3437 days

#11 posted 02-13-2013 12:31 AM

Thanks to all! I’m going to try to address everyone, here goes….

kdc68 – Thanks and I painted it to match our cars, I’m weird like that.

David Dean – Thanks, I’m excited to breath easier!

Tym – That would be best, why style/type of timer are you using?

anthonyD – thanks!

b2rtch – Where did you pick up the switch from? I did try to find one locally with no luck.

toddbeaulieu – I didn’t figure out the cfm’s just yet…. It’s a 1/2 hp and a healthy sized squirrel cage with 4 speeds.. All I know at this point, on high speed it will pull a sheet of paper to it from 3’ away! I advise checking with a local HVAC installer, a lot of times they are more than happy to get rid of the smaller units. Save your $$ and do a little phone work, for $50-$60 you will have a machine 2x better than anything you can buy.. Good luck!

mpl490 – Indeed, wish it was an original one!

Tom Huntley – Perfect! Thanks so much! Happy building and can’t wait to see yours!

rlamb007 – Thank you, I had an old blower laying around from previous home owner. ( it was huge) I am doing a small side jobe and they updated the the HVAC and I was able to score a bit smaller unit. I modified it with a 1/2 hp motor. (it had a 1/3hp motor) the more suck the better!

Thank you all for your feed back. It’s nice to have a community of like minded people!

-- --- Chad Franklin, IN ---

View Grandpa's profile


3265 posts in 4165 days

#12 posted 02-13-2013 12:37 AM

Where did you find those Jet filters you mentioned. Link please,

View povertyridge's profile


44 posts in 3437 days

#13 posted 02-13-2013 01:20 AM

Robz71lm7 – I agree, I was excited and jumped the gun on the pic’s, I actually have the box. Thanks for looking out for my safety!

-- --- Chad Franklin, IN ---

View thinbluebbq's profile


7 posts in 2397 days

#14 posted 01-02-2016 05:14 AM

Great work. I have a great furnace fan courtesy of my awesome hvac guy in Franklin! Great to find another local south side woodworker.

View povertyridge's profile


44 posts in 3437 days

#15 posted 01-07-2016 08:45 PM

Thanks thinblue, It is a lung saver for sure!!!

-- --- Chad Franklin, IN ---

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