Shop Made Air Cleaner

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Project by Gene47 posted 04-22-2009 06:18 AM 7045 views 40 times favorited 17 comments Add to Favorites Watch

This is a shop made air cleaner that I made using an old furnace squirrel cage blower. I built the box out of 3/4 plywood and mounted the squirrel cage inside. I then made frames that would hold a standard size throw away furnace filters. I put 2 on the intake side of the blower and one on the exhaust side.

When It is time to change I throw away the first intake filter move the other 2 forward and put a fresh one on the exhaust side.

I have calculated that this blower will exchange the air in the shop about every 8 minutes.

I got the blower for free and had most of the other material around the shop so maybe have about $60 bucks invested for a very effective air cleaner that does a nice job when I am sanding or making a lot of sawdust.

-- Gene Miller - it only took me 3 days 9 hours and 28 minutes to get that top flat!

17 comments so far

View interpim's profile


1170 posts in 4425 days

#1 posted 04-22-2009 06:31 AM

How do you switch it on and off?

I am curious if it’s possible to hook one of these up to your equipment switches to cycle the air while your running your sanders etc…

-- San Diego, CA

View MNbuzzdust's profile


99 posts in 4318 days

#2 posted 04-22-2009 07:33 AM

Great job. Thanks for posting it.

View noknot's profile


548 posts in 4408 days

#3 posted 04-22-2009 09:53 AM

Nice work


View Joe Weaver's profile

Joe Weaver

543 posts in 4652 days

#4 posted 04-22-2009 02:10 PM

great job

-- Joe, Ga

View Scott Bryan's profile

Scott Bryan

27249 posts in 4788 days

#5 posted 04-22-2009 03:05 PM

Gene, this is a really nice addition to your shop. Good job on the design and build as well.

-- Challenges are what make life interesting; overcoming them is what makes life meaningful- Joshua Marine

View Gene47's profile


74 posts in 4293 days

#6 posted 04-22-2009 04:25 PM

I have a timer in the outlet that I plug it into and have it set to run a couple of hours every day but if I am sanding there is a switch on the timer that will turn it on to run continuous. In the summer time when the AC is running I set the timer to run more so that I don’t get so much fine dust through the AC. I also place a furnace filter in front of the AC to catch fine dust as well.

-- Gene Miller - it only took me 3 days 9 hours and 28 minutes to get that top flat!

View MyOldGarage's profile


93 posts in 4394 days

#7 posted 04-22-2009 05:40 PM

Very cool—I’m going to build one of these for next fall/winter, unless I get too spoiled by working in AC this summer. (My garage pipes are exposed, so it’s either sweating/dripping pipes or a cool garage . .. hmm . . )

-- Bradley Miller, Blue Springs, MO -

View PurpLev's profile


8642 posts in 4615 days

#8 posted 04-22-2009 05:57 PM

nice looking setup…

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Kevin Depies's profile

Kevin Depies

104 posts in 4334 days

#9 posted 04-22-2009 06:12 PM

Very nice! I’ve been thinking about building something like this for a while. Buying an air cleaner seems like such a ripoff for how simple they really are. I just need to get my hands on a furnace blower to design it around… wish I knew someone who works in HVAC.

Within the last week I’ve come to the realization that I’m allergic to walnut dust. I had a couple reactions where my face turned all red before I made the connection that it happened after I was working with walnut. From what I’ve been reading, a reaction to one wood means I’m susceptible to reactions from others, so I really need to start taking more precautions than just using a dust collector. Something like this needs to be added to my shop sooner than later.

Thanks for posting.

View Popeye Jr.'s profile

Popeye Jr.

120 posts in 4389 days

#10 posted 04-23-2009 07:23 AM

great work thet should help out your air quality alot.

-- People who say it cannot be done should not interup those who are doing it

View Chris Davis's profile

Chris Davis

1560 posts in 4948 days

#11 posted 04-24-2009 07:33 PM

I like that. I need a couple of those.

-- Watch live video from our shop.!current-projects/c3c1

View Dusty56's profile


11863 posts in 4654 days

#12 posted 04-26-2009 08:41 PM

Great job on this one : )

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

View Don K.'s profile

Don K.

1075 posts in 4293 days

#13 posted 04-28-2009 07:04 AM

Looks great !!! Thanks for posting and sharing it.

-- Don S.E. OK

View aj_houston's profile


22 posts in 4259 days

#14 posted 05-31-2009 03:07 PM

Nice job! I am thinking of building one of these.

How did you get it up to the ceiling, and how did you mount it?

-- It is better to wear out than to rust out. --Cumberland

View Gene47's profile


74 posts in 4293 days

#15 posted 05-31-2009 03:51 PM


At the time I was mounting this I had just finished putting up the OSB on all of the walls and ceiling and had borrowed a panel lift from a friend.

I just put a piece of plywood on the panel lift and then set the air cleaner on top of that and cranked it up to where I wanted it and screwed it to the ceiling. I made sure that 4 of the screws went into the 2×4 ceiling joists that I had run and then put in about 8 more directly into the 7/16 OSB panels.

Hope this helps.


-- Gene Miller - it only took me 3 days 9 hours and 28 minutes to get that top flat!

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