Air Filtration Project

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Forum topic by _Steve posted 05-13-2010 10:33 PM 1470 views 1 time favorited 1 reply Add to Favorites Watch
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85 posts in 3232 days

05-13-2010 10:33 PM

I’ve been signed up on LumberJocks now for 3 months and thought I should get around to joining in with posting with everyone else. I am currently recovering from a back fusion, and being unable to work in the shop, thought I would download Google’s SketchUp 7 and design my next project, an Air Filtration System. It looks like this project has been tackled quite few times already, but here’s what I’ve come up with.

I have basement shop with a 9’ ceiling with exposed floor joists. I found a 4 speed ½ HP squirrel cage blower on eBay and started from there. I was concerned about filtering out all the dust and not be re-circulating some. After a few days of research, I decide to go with 1” Merv 8 (5 micron) pleated pre-filters and a Merv 14 (90-95% efficient @ 1micron) final pocket filters.

My other concern was to filter/exchange all the air in the shop and not just what’s nearby the unit. To that end, I decided to direct the output up into a joist cavity and pan it to both sides of the shop, and have 2 intakes on both sides of the blower. Unit Size: 24 1/2” wide x 50” long x 17” tall.

I also incorporated a control/access and blower mount panels so that any of the components can be slid out and serviced or replaced. All components are off-the-shelf parts and are available on the web. To keep the weight down as much as possible, I’m going with a ¾” plywood top and blower mount panels with ¼” Birch plywood bottom and side panels, held together with 4 support frames, of which 2 of them are also the final filter mounts.

I researched 2 levels of controls, one of a simple 12 hr. timer with a 15amp single pole, 4 throw, rotary switch and the other using the remote control system from Jet’s model 2000 system, with the second one doubling the cost of first. I’ve decided the simple timer and switch will suffice for me.

All said and done, I expect my total cost to be 25% of the comparable Jet AFS2000. System specs should be approx. : low 1162 cfm, Low-med 1393 cfm, med-high 1546 cfm, and high 1700 cfm. I would welcome any and all feedback on my project. Thanks in advance.

-- McMaker Woodworks, Where you can give directive for a pending antique.

1 reply so far

View PurpLev's profile


8547 posts in 3854 days

#1 posted 05-13-2010 11:03 PM

looks good so far. as you mentioned, this project HAS been tackled many times over. and all with great success. looking forward to seeing your implementation. the double intake and larger cabinet will add quite a bit of weight though.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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