Shop Air Cleaner

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Project by wunderaa posted 05-15-2012 03:36 PM 4542 views 26 times favorited 15 comments Add to Favorites Watch

I finally got around to making a shop air cleaner. What a difference this makes!! Total cost ran about $60 and took about 4 hours to complete.

Unit is made to utilize common 16×20” filters. Constructed out of 3/4” plywood, the sides are rabbeted, then screwed and glued together. Has some internal bracing, as well as gasket material to seat the filters onto. Currently it has a 4”, 1-micron furnace filter fronted by a cheap pre-filter. Fan was purchased through craigslist for $20 and came out of an old a/c unit. Fan is 1075 cfm, 4-speed, but just wired for single speed. I have wired it into a new wall switch for convenience.

I highly recommend this quick project to folks here. Keep an eye out on craigslist for a/c blower for cheap and breathe easy!!

15 comments so far

View Shanem's profile


130 posts in 2667 days

#1 posted 05-15-2012 03:47 PM

I made one of these for my shop a few months ago. On mine I installed a 6hr timer so that I can leave it on when I leave the shop.

View KMT's profile


603 posts in 2863 days

#2 posted 05-15-2012 04:16 PM

Nice job. Its one thats been on my list for a while now.

-- - Martin

View AgentTwitch's profile


631 posts in 3697 days

#3 posted 05-15-2012 04:21 PM

Great addition to your shop and very clever. I need one of these…

-- Regards, Norm

View OregonWoodRat's profile


168 posts in 2488 days

#4 posted 05-15-2012 05:28 PM

Yep I do need one. I have a 312sqft shop and it does not take much to fill the air with dust.
Looks great.

-- Peter, A man convinced against his will is of the same opinion still.

View Woodwrecker's profile


4200 posts in 3776 days

#5 posted 05-15-2012 07:40 PM

Nice job.
And welcome to Lumberjocks.

View Martyroc's profile


2712 posts in 2507 days

#6 posted 05-16-2012 11:14 AM

Nice job, i am working on one myself.

-- Martin ....always count the number of fingers you have before, and after using the saw.

View mrpedal's profile


30 posts in 2739 days

#7 posted 05-16-2012 04:05 PM

Could you tell me the CL search you used, and what sub board? I’m finding plenty of fan motors, but not the fan/blower unit per say. Nice work!

View wunderaa's profile


248 posts in 2403 days

#8 posted 05-16-2012 04:33 PM

mrpedal, I used a CL search for furnace blower in tools and again in materials and waited a couple of weeks until one turned up. I think I lucked out a bit because the voltage, cfm, and overall size were exactly what I was looking for. With summer around the corner, there should be some of these hitting the market as people repair or upgrade their A/C units.

And it’s certainly worth the wait because a new comparable motor/blower assy. from Grainger runs $330 + shipping.

Dayton Blower Assembly

View mrpedal's profile


30 posts in 2739 days

#9 posted 05-16-2012 04:50 PM

Exactly the info I needed. Thank you very much.

View eddy's profile


939 posts in 3565 days

#10 posted 05-17-2012 02:44 PM

i made/posted one of these about a year ago i have been wanting a better filter for mine where did you get that filter? looks great
thanks for sharing

-- self proclaimed copycat

View wunderaa's profile


248 posts in 2403 days

#11 posted 05-18-2012 03:13 AM

Filters were both from HD. I splurged on the larger filter, knowing that I would always keep it fronted by a cheaper pre filter.

View Lee A. Jesberger's profile

Lee A. Jesberger

6866 posts in 4180 days

#12 posted 05-18-2012 10:48 AM

Very helpful post.

Welcome ro Lumberjocks.


-- by Lee A. Jesberger

View wunderaa's profile


248 posts in 2403 days

#13 posted 05-21-2012 06:55 PM

@eddy – I see that we have the same TS. Looking at your posts, I’m excited to make a version of your router table extension. How do you like the stock fence on the Craftsman?

View eddy's profile


939 posts in 3565 days

#14 posted 05-21-2012 08:19 PM

i have changed it up a lot i will attach a picture of the latest and greatest my new fence is great the stock fence was ok for what it was i now havea router table at bothends of the saw i like the woodpecker lift the best
if you have any questions please ask always will to share

-- self proclaimed copycat

View TimWood's profile


196 posts in 2442 days

#15 posted 04-14-2013 01:05 PM

Man no….don’t buy new at Grainger….most of us know a HVAC guy. Every time they replace an AC “package unit” there is a fan motor or “squirrel cage” in it. Go to the guy’s shop where he keeps all of the old units he has replaced for people. What happens is a few times a year, he separates, salvages, and sells the metals and the old fan motors to scrap yards. If you know the guy well, he may give you one, if not $20 will probably get the unit. I’m surprised at yours though being 110V…most are 220v. Still it’s simple to wire.

-- Tim Harrelson

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