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Project by MikeDe posted 02-22-2011 06:30 AM 3580 views 24 times favorited 19 comments Add to Favorites Watch

This is an inexpensive unit to build and does a good job picking up dust especially sanding dust.
I used 3/4 plywood to build the box and 3/4 oak for the door
I used a felt weather stripping on the door provides an airtight seal
The unit has two filters. The primary filter is a 14×20 furnace filter.
The secondary filter is a “K&N Performance Filter” #33-2035, made for a Corvette,
and can be bought at most auto parts stores.
This one I wash out a few times a year.
I just spray it with any household cleaner like Fantastic and rinse with water
The three-foot long duct on the discharge moves the clean air away from the unit
so as not to pull the same air into it repeatedly, like the store bought cleaners

19 comments so far

View NBeener's profile


4816 posts in 3168 days

#1 posted 02-22-2011 06:32 AM

Very slick.
Very nice looking.
Very resourceful, in parts selection.

I’ve had lots of K&N’s. Good product.

Looks like a small block filter, right ? Maybe 427cid, but NOT a 454 ;-)

Do you know the HP and or the CFM of the motor you used ?

-- -- Neil

View BTKS's profile


1986 posts in 3458 days

#2 posted 02-22-2011 06:47 AM

Absolutely ingenious, I love the exhaust duct and incorporating the car parts.

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View DIYaholic's profile


19618 posts in 2669 days

#3 posted 02-22-2011 07:43 AM

Very nice unit.
I’m in the process of designing/setting up my shop (tool/machine placement, DC ducting, lighting/electical). All this includes building my own air cleaner. Seeing your work inspires me to attempt to build one of nearly equivalent quality, not just a “functional” unit. Thanks for sharing your project.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View steliart's profile


2595 posts in 2682 days

#4 posted 02-22-2011 08:31 AM

great idea and very nice construction

-- Stelios L.A. Stavrinides: - I am not so rich to buy cheap tools, but... necessity is the mother of inventions

View Splinterman's profile


23074 posts in 3355 days

#5 posted 02-22-2011 09:01 AM

Hey Mike,
Sweet unit, functional, healthy and cheap….well done.

View BigTiny's profile


1676 posts in 2882 days

#6 posted 02-22-2011 12:11 PM

I love the idea of using the duct to keep from recycling the same air time after time. I’ll bet most of us are filing this under “Why didn’t I think of that?”

-- The nicer the nice, the higher the price!

View Mojo1's profile


267 posts in 2684 days

#7 posted 02-22-2011 02:40 PM

very nice

View Big_Bob's profile


173 posts in 3703 days

#8 posted 02-22-2011 05:04 PM

I do have a question what did you use for a fan motor?

-- Bob Clark, Tool Collector and Sawdust Maker

View KMT's profile


603 posts in 2656 days

#9 posted 02-22-2011 07:17 PM

Thanks for sharing this one. Its a great idea using a washable K&N filter. I second Bobs question. Whats in it for a fan and motor?

-- - Martin

View peteg's profile


4283 posts in 2817 days

#10 posted 02-22-2011 10:30 PM

I too am interested in the drive gear :) looks a good job

-- Pete G: If you always do what you always did you'll always get what you always got

View SgtSnafu's profile


960 posts in 3265 days

#11 posted 02-23-2011 02:00 AM

I like the idea of the added duct keeping the clean air circulating..

Thanks for sharing

-- Scotty - aka... SgtSnafu - Randleman NC

View Gpaw's profile


65 posts in 2681 days

#12 posted 02-23-2011 02:36 AM

Nice work . I built a 3’ x 6’ filter box on my central heat and air inlet . it works great.

View Dusty56's profile


11819 posts in 3682 days

#13 posted 02-23-2011 03:44 AM

”so as not to pull the same air into it repeatedly, like the store bought cleaners”
Nice idea , but my air cleaners are three feet long and suck the dust in one end and exhaust the filtered air out the other end , and they’re store bought and it’s virtually impossible to recirculate the same air with the velocity created by them.
I’ve yet to see any “store bought” units that are built square in the first place , and / or exhaust anywhere near the intake area.
Yours looks like a nice unit for being homemade …what fan and motor are you using in it ? : )

-- I'm absolutely positive that I couldn't be more uncertain!

View Jeffrey Williams's profile

Jeffrey Williams

30 posts in 2685 days

#14 posted 02-23-2011 04:04 AM

Nice design and looks fairly easy to do. Could you add some info on the fan/blower unit?

View Rob Vicelli's profile

Rob Vicelli

104 posts in 2685 days

#15 posted 02-23-2011 05:31 AM

I would also like to know the fan inside…..Nice design though

-- Rob V

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