Completed Air Filtration System

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Project by MikeGCNY posted 12-13-2010 07:07 AM 3855 views 6 times favorited 15 comments Add to Favorites Watch

Finally finished this and mounted it. I used some furnace filters and a new attic fan that my father had given to me. Overall, i think I spent about $50.00 on it.

I don’t like the way the attic fan is working out and plan to swap in a HVAC blower once i get my hands on one. The attic fan is way too choppy and loud. It works though—the air is noticeably much cleaner.

15 comments so far

View Timthemailman's profile


336 posts in 4237 days

#1 posted 12-13-2010 09:24 AM

I need to do something like that, thanks for the post

View Eagle1's profile


2066 posts in 4525 days

#2 posted 12-13-2010 02:13 PM

I agree with you Timthemailman. I need to make one also. Got a couple of other things to do first, running a couple of more 220’s.

-- Tim, Missouri ....Inside every older person is a younger person wondering what the heck happened

View BernieMay's profile


31 posts in 4498 days

#3 posted 12-13-2010 02:40 PM

What kind of filter did you put behind the furnace filter we can see?

View Maveric777's profile


2694 posts in 4538 days

#4 posted 12-13-2010 02:49 PM

What a good reminder to quit putting the saw dust in the air long enough to make something to take the saw dust out of the air. Good stuff Mike!

-- Dan ~ Texarkana, Tx.

View natrous's profile


65 posts in 4245 days

#5 posted 12-13-2010 03:43 PM

Nicely done. I’m trying to find a blower too so I can build something similar. Thanks for sharing your design!

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

View Knothead62's profile


2600 posts in 4422 days

#6 posted 12-13-2010 03:52 PM

My wife saw a show on HGTV where they used a box fan and a furnace filter attached with a bungee cord. I just turn mine on high and the suction keeps it snug against the fam. I was sanding yesterday and was surprised at how it kept the air clean.

View dfdye's profile


372 posts in 4498 days

#7 posted 12-13-2010 07:23 PM

I did the box fan/furnace filter, but I wanted a little more sturdy solution to attach the filter than the bungee cords, so I used duct tape! :)

It really does work quite well, and if you want more capacity, it is quite cheaply upgradeable (just buy another fan!). If you do build one of these, be sure to put the filter on the “sucking” side of the fan and not the “blowing” side. The other trick I would recommend, as with any air filter system, is to have the “in” side facing your dirty area where the dust gets generated, and the “out” side facing a cleaner area where there isn’t as much dust. So far this has worked quite well for me in my 2 car garage shop.

-- David from Indiana --

View Jim Reeves's profile

Jim Reeves

211 posts in 4484 days

#8 posted 12-13-2010 09:47 PM

Great job Mike, l think it looks great and no dought the air is much cleaner.
Just wondering, likely to start moving my shop, to my father inlaw’s house he gave my wife and l his home.
He gave me a furnace blower, if l made box like yours would furnace blower with a furnace filter do the same thing in cleaning the air?
Again a great job


-- jim

View NBeener's profile


4816 posts in 4635 days

#9 posted 12-13-2010 09:48 PM

Very nice !

-- -- Neil

View dbhost's profile


5906 posts in 4693 days

#10 posted 12-14-2010 12:28 AM

Air filtration is always an excellent upgrade. You did a good job on that. Can I make a suggestion though? You might want to take a router / roundover bit and reileve the edges if that hangs down low enough, and you are tall enough to introduce your skull to those corners. I bet that could HURT…

-- Please like and subscribe to my YouTube Channel

View dbhost's profile


5906 posts in 4693 days

#11 posted 12-14-2010 12:33 AM

Oops. Wrong window…

-- Please like and subscribe to my YouTube Channel

View Grantman's profile


119 posts in 5487 days

#12 posted 12-14-2010 01:26 AM

Similar to one I made. I have a buddy in the HVAC biz and asked him for an old blower. I built a box with 2) 20” x 20” intake filters on either side of the box and then blowing out through a 12” x 12” filter in the front. It’s stationed near my table saw and blows toward the front of the shop (basement, too).

You should be able to call around to HVAC contractors and ask them for old blowers…you certainly don’t have to go and buy one. I also got round vacuum cleaner belts (4”- 6” Ø) and doubled them to use for shock absorbers as the vibration from the basement had my wife going nuts. Sequence: rafter > hook > belt > chain > belt > hook > air cleaner.

Also, stop in at Lowe’s or the Depot and get a solid-state timer. I leave mine running for an hour or more after I leave the shop…it helps keep things really clean. Just my 2¢.

View dfdye's profile


372 posts in 4498 days

#13 posted 12-14-2010 08:33 AM


You can definitely use an old HVAC blower! Here is one I just found via a quick search:

I am sure there are plenty more designs to provide some inspiration.

-- David from Indiana --

View MikeGCNY's profile


44 posts in 4956 days

#14 posted 12-14-2010 09:08 PM

Thanks all for the tips!

@Jim – An old blower is probably ideal. The problem is in my area I cannot locate any that are reasonably priced. Most of the contractors want to sell me old blowers for more than a brand new JDS filtration system would cost.

@dbhost – I am short. I am planning on putting some child proofing foam around the edges. Ideally i want to move the unit a little more towards the back of my house so that people walking down the stairs don’t take a hard left and hit their head. But the only people who ever go down to our basement are myself, my wife and our cleaning lady and we are all kind of short.

@BernieMay – I used 3M filters. I have a MERV 7 and MERV 9 filters behind the blue furnace filter—and these are only on the “intake” side. You could also take a look at McMaster-Carr online. The have some great pocket style filters. I could not use theirs because they only come in 20×20.

View ClayandNancy's profile


532 posts in 4476 days

#15 posted 12-14-2010 09:45 PM

I gave the furnace exhaust blower from my old furnace to a friend and he made one, other than color looks just like my Delta. He has three filters mounted in it. Works good

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