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Woodshop air filtration unit

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Project by Bullgoose posted 1829 days ago 6394 views 18 times favorited 18 comments Add to Favorites Watch

This is the air filtration unit that I built for my shop. I used a dual squirrel-cage blower attached to a 1.5hp, 220v electric motor that I was given. I attached a timer as the activation switch so that I can set it and forget it and allow it to run after I am done for the day. The cfm rating is such that it will cycle the entire volume of air in the shop about once a minute!

The first photo is of the intake side which houses two separate filters. The forth photo shows the slots where the filters live. They just slide in and out via a sliding “door” on the bottom of the unit. The fifth photo is the exhaust side which houses one filter. I always put the least capable filter on the outside intake, backed by a more capable filter. The exhaust filter is the best that I can buy at Lowes.

It works fabulously! Although it is not that pretty…sorta like me!

-- When I die I want to go like my grandfather did...peaceful, in his sleep...not screaming like the passengers in his car.





18 comments so far

View SCOTSMAN's profile

SCOTSMAN

5235 posts in 2172 days


#1 posted 1829 days ago

I’m pretty.

Pretty useless.LOLAlistair

-- excuse my typing as I have a form of parkinsons disease

View bigdave's profile

bigdave

27 posts in 1871 days


#2 posted 1829 days ago

Me too.

Don’t you just love the Lumberjock ingenuity. This is the greatest website! Too cool! :-)

View a1Jim's profile

a1Jim

111999 posts in 2164 days


#3 posted 1829 days ago

Hey Bull
good job

-- http://artisticwoodstudio.com Custom furniture

View gjd's profile (online now)

gjd

18326 posts in 2239 days


#4 posted 1829 days ago

Thanks for posting. I was measuring up my squirrel cage this afternoon and planning to do the build tomorrow.

-- gjd Southcentral Wisconsin

View eastside's profile

eastside

94 posts in 1848 days


#5 posted 1829 days ago

The squirrel cage reminds me of An exhaust hood for over the stove. Is that what you used and if not does anybody have any insight on using one? looks like a great idea and old stove hoods might be had on Craig’s list. Mike

-- Mike, Westport MA.

View panther's profile

panther

59 posts in 1830 days


#6 posted 1829 days ago

GOOD JOB I WISH I WOULD HAVE THOUGHT ABOUT A TIMER ON MINE , I’LL HAVE TO MAKE A CHANGE
I HAVE A 600 CFM STOVE HOOD WITH A HEPA FILTER IN A BOX LIKE THIS ONE, WORKS GREAT IF YOUR SHOP IS NOT TOO BIG

-- you must live for something or die for nothing (rambo)

View James Early's profile

James Early

48 posts in 2235 days


#7 posted 1829 days ago

I really need to make one of these for my shop. Can these fans (or something else adequate for the purpose) be picked up inexpensively somewhere?

-- -- Jim E., Oswego, NY. Create, have fun, and work safely!

View jockmike2's profile

jockmike2

10635 posts in 2833 days


#8 posted 1828 days ago

You can find these squirrel cages for little or nothing at garage sales. I got three of them for around 3 dollars each, all run like new and they work great. I made two blower units much like Bullgoose’s but mine are with 1 blower unit and I run exhaust across the shop to eliminate cycling good air through the unit. Mine work great except I too forgot the timer. Nice looking air cleaner you made Bullgoose. Mine are only 110 v.

-- (You just have to please the man in the Mirror) Mike from Michigan -

View bigike's profile

bigike

4030 posts in 1875 days


#9 posted 1596 days ago

great job, looks don’t matter with this just as long as it works and keeps your air and lungs clean!

-- Ike, Big Daddies Woodshop, http://www.icombadaniels@yahoo.com

View jm82435's profile

jm82435

1227 posts in 2329 days


#10 posted 1595 days ago

Everyone should have one of these. Once per minute? Wow! You must have a small shop and/or that things must really kick <bottom>.

-- A thing of beauty is a joy forever...

View Josh's profile

Josh

99 posts in 1609 days


#11 posted 1595 days ago

I really like the design and idea, I’m not all super familiar with the type of blower to use though. Would a carpet blower work or would that be too strong?

-- Josh, South Jordan Utah

View NBeener's profile

NBeener

4806 posts in 1761 days


#12 posted 1595 days ago

One and a half horsepower??

Whooo, Baby. THAT thing has got some snot!!! :-)

I’ve seen lots of these made as shop projects, liked and admired every one, but … yours is kind of the Mack Truck of the breed! Very nicely done!

Plus … as a guy who finally scored a CraigsList JDS AirTech 750 10-16, and has it mounted, I applaud the “attic fan” timer on yours. I bought two different possible solutions, but still haven’t gotten as far as installing them.

Very nice!

-- -- Neil

View Bullgoose's profile

Bullgoose

61 posts in 1980 days


#13 posted 1595 days ago

Thanks for the comments and questions. As far as using a carpet fan is concerned, I have no experience; however, if the CFM is adequate and the filtration is also, I cannot imagine that it would not suffice. My calculations indicate that, even with the tri-stage filters, I am actually marginally exceeding the one minute circulation time frame. But, I am not an engineer. Hell, I’m barely a woodworker!

-- When I die I want to go like my grandfather did...peaceful, in his sleep...not screaming like the passengers in his car.

View jm82435's profile

jm82435

1227 posts in 2329 days


#14 posted 1594 days ago

length x width x height = cubic feet. For instance, my shop is 24×36x9=7776 cubic feet – So I am thinking I would need to exchange about 8000 cfm through the filters to accomplish that… or about 5 of these:
http://www.rockler.com/product.cfm?page=17083&filter=air%20filtering%20filter
or 20 of these: (I do have one)
http://www.rockler.com/product.cfm?page=21678

-- A thing of beauty is a joy forever...

View Bullgoose's profile

Bullgoose

61 posts in 1980 days


#15 posted 1594 days ago

jm82435: my shop is 22’ x 21’ x 7.25’ = 3,349.5 cubic feet. My system, even with somewhat “dirty” filters, actually exceeds the one minute cycle comfortably, according to my CFM calulations.

-- When I die I want to go like my grandfather did...peaceful, in his sleep...not screaming like the passengers in his car.

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