cheap air cleaner

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Project by Walt posted 10-15-2010 12:01 AM 5421 views 21 times favorited 29 comments Add to Favorites Watch

This air cleaner uses a dual window fan with remote control $54.00 MDF one half a sheet (left over from another project) 4 12×24x1 furnace filters 3.97 at HD. Piano hinge from an old desk I refinished. It will be hung over my workbench near the entrance to my shop. I will need my sons help to lift it into place. I expect to get very good service. Will keep you informed

-- Walt Wilmington Delaware, http://[email protected]

29 comments so far

View Pie's profile


187 posts in 4686 days

#1 posted 10-15-2010 12:13 AM

Ah so that is the Air Cleaner project! Very nice job. Looks a lot better than mine. I see you have a filter in the front and back. I did the same thing but removed the one in the back. Someone made a comment that 2 filters may not let the fan move as much air through the filter as one…kinda like a/c or heaters. One filter at the intake. But whatever works for you. Hope to see more of your projects. Hopefully I can get back to making sawdust but work and the house reno’s and auto repairs keep me busy.

Again, great job.

-- Pie

View swayze's profile


97 posts in 4369 days

#2 posted 10-15-2010 12:30 AM

I made one sort of similar. The only difference I used 2 duct fans used for boosting air flow in forced furnace ducting.

View Manitario's profile


2818 posts in 4164 days

#3 posted 10-15-2010 12:34 AM

Great idea; what is the CFM for the fans? Let us know how well it works.

-- Sometimes the creative process requires foul language. -- Charles Neil

View dbhost's profile


5812 posts in 4513 days

#4 posted 10-15-2010 12:50 AM

Looks like it should do the trick!

-- Please like and subscribe to my YouTube Channel

View NBeener's profile


4816 posts in 4455 days

#5 posted 10-15-2010 12:53 AM

I’ve got one running, now, in the shop …. as an exhaust fan.

I did a big flood coat of Danish Oil on a project I’m building, and … PHEW ! Basement shops DO have a FEW downsides !

I FEEL like my 20” box fan pulls more CFMs than my twin-fan, in-window unit, BUT … it sure ain’t gonna’ hurt to run it with a filter on it :-)

-- -- Neil

View Dennisgrosen's profile


10880 posts in 4396 days

#6 posted 10-15-2010 12:57 AM

I have done it before and now I even wonder more , why is it we don´t have
theese kind of windowfans here in Denmark :-(


View Derek Lyons's profile

Derek Lyons

584 posts in 4849 days

#7 posted 10-15-2010 09:52 AM

How well does it seal and how does the lid close since the fan is decidedly not square?

-- Derek, Bremerton WA --

View Walt's profile


264 posts in 4119 days

#8 posted 10-15-2010 01:37 PM

Thanks for all the comments. Derek it seals well I used 1/2 in foam weather stripping on the lid so when it closes it seals completly. The channels for the filters are fitted so that they seal this area. I actually have two filters behind the fan and one in front. The two behind are 2 inches apart. The air flow is fine and according to the fan manual it should exchange an 9×12 room air in 10 min. I beleive this is about 250 CFM.

-- Walt Wilmington Delaware, http://[email protected]

View rivergirl's profile


3201 posts in 4119 days

#9 posted 10-15-2010 01:39 PM

Ha! what a cool idea. And I have one of those dual fans. So I have never seen a real air cleaning system and am completely ignorant about this. (I work outside in the the yard…but maybe one day can actually get inside the garage or basement…) I am wondering- does the box get filled up with dirt in there? And is there no wood on the front and back- just fan and filter? I can’t really tell from the pictures because I have no previous experience to draw from. (sorry..)

-- Homer : "Oh, and how is education supposed to make me feel smarter? Besides, every time I learn something new, it pushes some old stuff out of my brain."

View natrous's profile


65 posts in 4065 days

#10 posted 10-15-2010 07:04 PM

Nice job! Something like this is in the top 3 on my list projects to work on.

-- I do not like work even when someone else does it. - Mark Twain

View NBeener's profile


4816 posts in 4455 days

#11 posted 10-15-2010 07:11 PM


Not to take away from your thread, OR from your fine idea, but … out of curiosity, I had to check the CFM ratings on your basic 20” box fan.

The $20 Lasko model kicks out about 2,000 CFM.

I like the idea of using BOTH, personally. The window unit can keep fresh air coming in, and the box fan is infinitely portable, allowing you to put it right by the work you’re doing.


-- -- Neil

View TheDane's profile


6017 posts in 4944 days

#12 posted 10-15-2010 07:29 PM

Dennis—My grandfather told me once it never got hot in the old country … he said there was always a cool breeze where he lived (Horsens).

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View Marcalo's profile


72 posts in 4063 days

#13 posted 10-15-2010 07:38 PM

Just as a friendly warning to be careful. The motor may not be suitable for continuous exposure to dust and could be susceptible to the chance of causing a fire. I recently discovered this while researching making my own air cleaner design. Worth looking into!

View Dennisgrosen's profile


10880 posts in 4396 days

#14 posted 10-15-2010 07:46 PM

The Dane :-)
yah the same on this Irland ( Ærø) always windy
but the last 20 years it has realy become an isue in the sommertime
sadly more and more people buy airconditioner to cool the houses
I think mostly becouse of the modern buildingtecnic they live in a plasticboble now a days

now I see this aircleaner and have seen so many use windowfans when they make spraybooths
i begin to be a little frustrated over we can´t get them here
not that I ain´t in the read field already becourse we have to buy good handtools outside the country…lol

take care

View Marcalo's profile


72 posts in 4063 days

#15 posted 10-15-2010 07:54 PM

In the search area type in homemade air cleaner and check out what HickoryHill made it’s probably the route I want to take because I need a smaller sleeker design for my small shop. Cheers!

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