Shop air filtration box

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Project by Fdxjetmech posted 01-19-2015 09:24 PM 3112 views 19 times favorited 4 comments Add to Favorites Watch

Neighbor got a new A/C system and put air handler on the curb. One mans junk…. Double filters on each end. Expensive filters on inside,cheap ones on outside to catch the big stuff. I had it on wheels but would blow across the shop as it moves tons of air. I now have it hanging from ceiling near heater. It exchanges air in the shop quickly.
I also installed a 3 speed rotary switch to lower the speed. 4 filters and 1 sheet of plywood invested.

I have since removed the supply grate as I found it was too restrictive and added a deflector to direct the jet blast down.

-- "Plagiarism is the highest form of flattery"

4 comments so far

View rustythebailiff's profile


99 posts in 2821 days

#1 posted 01-20-2015 03:47 AM

Very nice! Low flying birds beware, that thing looks like it could pull down a small plane. Good news for your lungs and anything you are finishing.

-- "Necessity is the mother of invention"

View 489tad's profile


3900 posts in 3891 days

#2 posted 01-20-2015 11:15 AM

Nice job. I’m building one now and I don’t notice much of a difference in speed between high and low. What brand of switch did you use. Thanks for posting.

-- Dan, Naperville IL, I.G.N.

View Fdxjetmech's profile


20 posts in 2484 days

#3 posted 01-20-2015 12:08 PM

I don’t know what brand it was got it at hardware store. I dont notice much difference either. I think its like 2-300 rpm difference in each position. I use it on low most of the time for general scrubbing and high when I’m sanding.

-- "Plagiarism is the highest form of flattery"

View 489tad's profile


3900 posts in 3891 days

#4 posted 01-20-2015 02:00 PM


-- Dan, Naperville IL, I.G.N.

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