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Shop made Air Filtration system

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Project by Cruiszr posted 01-22-2014 10:35 PM 1919 views 25 times favorited 7 comments Add to Favorites Watch

This is the air filtration system that I built last year for my workshop. The squirrel cage blower came from a downdraft stove we replaced when remoding our kitchen. Didn’t realize that I would be using it for air filtration when I pulled it from the stove, just knew it would come in handly at some point. Glad I saved it now.

The box is made from 3/4” ply that I had left from another project. Everthing was butt jointed using glue and sheet rock screws. I tried to keep the size as small as I could and still fit the blower motor inside. I ended up using 12×20 filters which kept the heigth of the box to 12 inches. (filters ar not a true 12 inches high.) The length of the box ended up being 24 ” long and the width 22”. The exhaust end of the box was fitted with a 8”x16” heat and air vent. The box is still unfinished but I may eventually get around to painting the box but didn’t seem important at the time.

Currently I have the two speed motor wired for a single speed but plan to change that when I install the additional work light to the bottom of the air box. At that time I plan to put in a a triple gang switch for the two speed motor and the light. I currently turn the filter system on via a remote control that also control dust collection and my shop vac. Will post something on that later.
My total investment in the air filtration system is about $15 for the air vent and filters. Everything else I used was lying around the shop looking for a project, lol

If you have an questions shoot me a line!

-- George R. Forest, Virginia





7 comments so far

View Todd's profile

Todd

228 posts in 331 days


#1 posted 01-23-2014 12:04 AM

I’m going to build one of those when I complete my current project. I like your design: simple and functional. I too have stuff laying around to build it from but I need to find a blower somewhere. Do you have any idea of the CFM?

-- Todd, Huntsville, AL

View Cruiszr's profile

Cruiszr

87 posts in 247 days


#2 posted 01-23-2014 12:45 AM

Not sure about the CFM’s without looking at the blower. As my shop is only 16×20 the unit I’m using should be more than enough considering what it was designed for. I know some people are using blowers out of a junked furnace but they are really big and require a large box. I would try and find a discarded kitchen over head exhaust fan and pull the blower from that. If you want to go the new route a place like Granger’s sells the squirrel cage blower.

-- George R. Forest, Virginia

View Nowater's profile

Nowater

6 posts in 595 days


#3 posted 01-23-2014 03:24 AM

Go to your air conditioning or heating man and ask about blowers from air handlers that have been replaced or torn out. I salvaged mine when the AC bit the dust. Just be aware that many of the motors will be wired for 220 volts, so you will need the correct rating on your switches and plugs.

View grumpy749's profile

grumpy749

216 posts in 1032 days


#4 posted 01-23-2014 03:26 AM

Hey George, this looks great. It’s very similar to mine. I used an old furnace blower and filters on both sides with an oak plywood box. To me its the best thing in my shop and I use it often. I find it only needs to run for only a few minutes at a time To filter the entire shop. Check it out on my projects. You will love yours and its the best thing fore your lungs. First class post, looks great, cheep and looks after your health. Denis

-- Denis in Grande Prairie. Yesterday is history, tomorrow is a mistery, but today is a gift. That is why it is called the present.....Pink !

View woodify's profile

woodify

91 posts in 727 days


#5 posted 01-24-2014 02:51 AM

interesting. I’m going to add this to my to built list.

-- Woodify ~~ http://woodified.blogspot.ca/

View sheetzy's profile

sheetzy

80 posts in 814 days


#6 posted 01-25-2014 10:35 PM

I was considering spending a good bit of money on one. THANX. I just happen to have a blower fan handy….....thanx…....sheetzy

-- Sheetzy

View Cruiszr's profile

Cruiszr

87 posts in 247 days


#7 posted 01-25-2014 11:34 PM

Ha Sheetzy,
Saving money on the air filtration means you can buy another new tool right.

-- George R. Forest, Virginia

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