Shop Air Cleaner

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Project by GMatheson posted 1214 days ago 5054 views 35 times favorited 11 comments Add to Favorites Watch

I acquired an older furnace blower saw it as a perfect opportunity to make my shop a little cleaner. The unit itself is pretty large at 33”x22”x19” tall. I have two 16”x20” filters on each side and the air blows out the top. I splurged and installed a one hour timer on it. It’s mostly made out of scrap 1/2” ply to attempt to keep the weight down. With the 1/2HP motor it really sucks. You can watch the dust travel 10 feet straight to the filter. It was an easy build that only took a few hours to make. The hard part was lifting it to the ceiling by myself.

-- Greg - "I wish the first word I ever said was the word 'quote' so right before I die I could say 'unquote'." -Steven Wright

11 comments so far

View patron's profile


12850 posts in 1844 days

#1 posted 1214 days ago

i was looking at filters for this too

where did you get the timer

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View GMatheson's profile


359 posts in 1472 days

#2 posted 1214 days ago

just grabbed it at the hardware store. it was a timer used for hot tubs.

-- Greg - "I wish the first word I ever said was the word 'quote' so right before I die I could say 'unquote'." -Steven Wright

View TZH's profile


387 posts in 1643 days

#3 posted 1214 days ago

I agree with patron – sweet. I can certainly understand lifting a unit like that by yourself to hang it. Maybe an alternative might be to put the unit on casters to be able to move it around the shop. This might also make cleaning/changing the filters a little easier, too. Just a thought. I have three furnace blowers with motors that I was looking for a way to use for dust management in my shop. I do believe you’ve given me the inspiration. Thanks for sharing.



View GMatheson's profile


359 posts in 1472 days

#4 posted 1214 days ago

I dont have a whole lot of real estate on my floor to roll it around but changing the filters is pretty easy since its hanging about 6” above my head.

-- Greg - "I wish the first word I ever said was the word 'quote' so right before I die I could say 'unquote'." -Steven Wright

View ghazard's profile


379 posts in 2013 days

#5 posted 1214 days ago

This is a great idea. Being 6’4” I don’t have a lot of head room but i wonder if I could utilize this same concept but put the bulk of it up in the attic above the garage ceiling? Filters at ceiling level and an outlet blowing down… Did you have to give much thought to the inlet vs outlet size? I’m sure it is important but I wonder how critical…

Thanks for the inspiration! Great job!


-- "Hey, you dang woodchucks! Quit chuckin' my wood!"

View DragonLady's profile


298 posts in 1510 days

#6 posted 1214 days ago

I’ve been keeping an eye open for a furnace blower so I could make something similar. Right now I’ve got the “box fan with filter taped to it” version :)

-- A woman's work is never done-but power tools help!

View robert triplett's profile

robert triplett

1472 posts in 1608 days

#7 posted 1214 days ago

I have had one of these blowers sitting in my shop for a few years. I took out a forced air unit from my mobile home. I know the furnace heating unit was 220. Is the fan run on 110? that’s what I have in my shop. Your unit is exactly what I have envisioned building. thanks for sharing.

-- Robert, so much inspiration here, and so little time!

View sedcokid's profile


2652 posts in 2101 days

#8 posted 1214 days ago

Say, that is a nice unit. I can tell from the size of the blower and motor that it would really suck….

Thanks for sharing

-- Chuck Emery, Michigan,

View SteveW's profile


340 posts in 1361 days

#9 posted 1214 days ago

Built a lot like mine, and I like it a lot.

-- On the eighth day God was back in His woodworking shop! SteveW

View canadianchips's profile


1830 posts in 1500 days

#10 posted 1214 days ago

Inpirational. Mt furnace fan is still sitting on my foor waiting for mr to make a cabinet. I need to mount mine in ceiling as well, I have NO floor space left. Knowing how well these do work, time to get at it !

-- "My mission in life - make everyone smile !"

View Sodabowski's profile


1968 posts in 1336 days

#11 posted 1207 days ago

Whoa dude. One of the things on my “to-do” list.

-- Holy scrap Barkman!

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