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Shop Made Air Filtration System

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Project by steve6678 posted 10-21-2012 09:22 PM 4556 views 35 times favorited 26 comments Add to Favorites Watch

UP-UPDATE – The unit is working fabulous. The filters are, all three dirty, yes-sah, I will take a pic and add soon.

UPDATE – I found out today that the exit filtret was too close to the fan and causing some air to be forced back into the unit…so I added 5” in front of fan, 3M filtret is NOW 5” from the blades and improved dramatically the inbound air pressure. SEE NEW PICS

Finished this Air Filtration (2 day – 6hr build) today. Attic Fan form Amazon $60, 1 sheet Shop 1/2” Birch, wiring from old band saw wiring switch, glue and brad nails, eye hooks, oak turn knobs (tabs), 2 standard furnace filters intake air, 16”x20”x1” and 1 3M 1 micron Filtret $22 same size, for exiting air. Really simple build, two side intake, 1 end exit air w/3M micro filter.

-- Steve - Dust sucks!





26 comments so far

View LesB's profile

LesB

1091 posts in 2197 days


#1 posted 10-21-2012 10:11 PM

Nice work.
I have a concern about the “fine” filter on the outbound air. I think you will have dust collecting on the fan blaces and the motor. It would be better to use both filters on the air intake side.
I have a similar one made using a used house furnace blower (squirrel cage). I use a coarse filter with a fine one behind it on the intake side. I get no dust build up on the motor or squirrel cage fins. The whole thing is built into a floor cabinet on wheels that also serves as a sharpening station and also has some storage. The exhaust air blows across my wood stove and circulates the heat.

-- Les B, Oregon

View scrimman's profile

scrimman

74 posts in 980 days


#2 posted 10-21-2012 10:13 PM

Sweet! Filters port and starboard but not aft! Makes perfect sense now that I’ve seen it; filter more air that way! And I wouldn’t have thought to put the filter on the output end either! Great ideas!

-- No matter where you go, there you are!

View steve6678's profile

steve6678

438 posts in 814 days


#3 posted 10-21-2012 11:02 PM

@ LesB, Thanks, I’ll keep an eye on the mechanics as it does it’s business, good looking out.
@scrimman, thanks too, I think it’ll produce a pull on the side ports, I tested it with tissue and it grabbed it right out of the air and stuck to the inbound filter. I MAY add a traingular semi-divider at the back to create a swirl or vortex type thing kinda like ”<” that, with the two intakes on either side of the ”<” against the boarded back

-- Steve - Dust sucks!

View CueballRosendaul's profile

CueballRosendaul

301 posts in 894 days


#4 posted 10-21-2012 11:15 PM

Nice build. I like the use of the attic fan because it’s rated for continuous duty. You might check out the string of comments on this project: http://lumberjocks.com/projects/71850 regarding filtration.

-- Matt CueBall Rosendaul. I don't think I've ever had a cup of coffee that didn't have cat hair or sawdust in it.

View steve6678's profile

steve6678

438 posts in 814 days


#5 posted 10-21-2012 11:31 PM

Hmm. good comments. I haven’t had a run at this system yet, working full bore in my shop…sanding, milling, routing, making all that mad dust that gets all over every-freaking-thing. Don’t you hate the dusting effect on absolutely everything in your shop…I can’t figure out how these guys with these bad ass shops that look spotless, I mean spotless, how do they keep it that way?
I spend 10-15 mins. EVERY end of the day vacuuming. Sometimes there is some sawdust and debris, and other times there is nothing, but I do the whole shop regardless…I HATE dusty surroundings.

-- Steve - Dust sucks!

View jap's profile

jap

1240 posts in 808 days


#6 posted 10-21-2012 11:51 PM

good for your health

-- Joel

View woodshaver's profile

woodshaver

2892 posts in 2107 days


#7 posted 10-22-2012 01:14 AM

Nice fillter box. I hate dust too! hope your fillter gets the job done for you! Good Idea!

-- Tony C St Augustine FL, My high school shop teacher said "You can do it"... Now I can't stop!

View b2rtch's profile

b2rtch

4351 posts in 1802 days


#8 posted 10-22-2012 10:02 AM

I hate dust in my shop also, especially because I am allergic to it.
I hate dust on my tools but even more so I hate dust in my lungs.
I realized a while ago that when you have a shop you always do one of two things: make a mess or clean a mess.
That’s about it.
I also noticed that it goes faster and much easier to make the mess that to clean it.
I want to build a air filter for a long time but I have no idea where to put it.
When I build one I would use an Hepa filter that I can get free at work.

-- Bert

View Tag84's profile

Tag84

573 posts in 1411 days


#9 posted 10-22-2012 01:39 PM

Do vou clean the filters once in a while, or after a long time just replace them?

-- -Thomas -

View woodzy's profile

woodzy

416 posts in 1433 days


#10 posted 10-22-2012 02:08 PM

Look like a solid design.

I spend a ton of time vacuuming and blowing dust from every corner of my garage eerr … shop, it seems that be smallest of projects will creat twice it’s weight in dust and debris.

I like that the exhaust ports are on the sides. Nice work.

-- Anthony

View Grumpymike's profile

Grumpymike

1191 posts in 1069 days


#11 posted 10-22-2012 03:53 PM

I really like your design and execution … my 20” box fan’s days are numbered.
When I need to really clean before finishing, I open the big door, sweep, vacuume, blow with compressed air and clear with the leaf blower. (Wife won’t let me dust the house … darn).
I think your idea of the triangle on the back wall might increase the airflow a tiny bit but it will elliminate the “dead space” eddy that square corners will cause.

-- Grumpy old guy, and lookin' good Doin' it. ... Surprise Az.

View steve6678's profile

steve6678

438 posts in 814 days


#12 posted 10-22-2012 07:01 PM

Thanks everyone!
We’ll see how it works out, in time.
The sides are the intakes, and the one 3M filtret is the exhaust, just clarifying…
I think I will add the top to bottom vertical ”<” inside, to create a kind of smoother ride for the air to travel on, ha.
I’ll post results as they are produced, thanks again all.

-- Steve - Dust sucks!

View steve6678's profile

steve6678

438 posts in 814 days


#13 posted 10-22-2012 09:39 PM

UPDATE – I found out today that the exit filtret was too close to the fan and causing some air to be forced back into the unit…so I added 5” in front of fan, 3M filtret is NOW 5” from the blades and improved dramatically the inbound air pressure. SEE NEW PICS

-- Steve - Dust sucks!

View steve6678's profile

steve6678

438 posts in 814 days


#14 posted 10-22-2012 09:42 PM

ALSO – note the dust ring around the exhaust filtret filter, it is collecting the fine particles and not putting them back into the shop.

-- Steve - Dust sucks!

View woodshaver's profile

woodshaver

2892 posts in 2107 days


#15 posted 10-22-2012 11:28 PM

Steve,
What to you think of this filter for doing this job?

Web Plus 20 in. x 20 in. x 1 in. Three-Phase Electrostatic FPR 4 Air Filter

-- Tony C St Augustine FL, My high school shop teacher said "You can do it"... Now I can't stop!

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