Exhaust Filters - Wynn, filter box, others filters for fine dust?

[servant74]

I know we all would like to have Wynn or similar filters, but for the budget minded of us, I saw where someone built a box that fit house type air filters.

Does someone have suggestions on building 'proper' fine particle exhaust filters for the fine particles (down to half a micron) that come out?
Any pans, pictures, drawings, etc would be appreciated, along with how it is working for you.  Do you need/have to clean or replace them often? (Yes, without knowing how you are using them it is difficult to truly compare.)

[Don Andrews]

http://www.ukworkshop.co.uk/forums/viewtopic.php?t=36843&postdays=0&postorder=asc&start=15

I pulled this link from another strand in here somewhere. Judgeing by the pics it looks to work very well.

Don

[servant74]

I saw a similar thing where someone had two smaller DC (bag systems, but same size), and basically cut some holes in the sides of a metal storage cabinet, One large input (like 6" and two 'exhaust' where the DC systems were attached).  It was like a 6' tal cabinet.

But my origional question was related to 'fine filters' and not the particle separation like the Thien Lid does nicely.

[Billy]

http://www.ukworkshop.co.uk/forums/viewtopic.php?t=36843&postdays=0&postorder=asc&start=15

I pulled this link from another strand in here somewhere. Judgeing by the pics it looks to work very well.

Don

I'm going off topic here a little, but thanks for the link to that site!

[Hobkirk]

I am assuming you need lots of filter surface area. You could - in simplistic terms - build a box with 1/2/3/4 sides (whatever works for your location) that are mostly covered with filters rated for 1/2 micron. You need lots of surface area to duplicate the Winn filter. But where do you find fine air filters or filter material? I don't know if they rate car/truck air filters, but I would imagine they are too coarse. Ditto even the expensive house air filters (or am I wrong - HEPA filters, maybe?). Shop vacuum filters are rated but I think 5-10 of the really fine ones would be too expensive (the CleamStream by Gore for the Sears vac costs $35 and filters to .3 microns). Are the HEPA and allergin bags in consumer vacuums fine enough? Those bags typically cost $2-$4 each. Each bag would (I think) be turned into a 2-3 square foot flat filter.

[JakesDad1]

I'm not an air "expert" but......

My primary concern is trying to reduce bad air, not necessarily eliminate it. I don't have the money or inclination to go to those extremes. I have found that a K-Mart box fan ($15) with 2 moderately priced furnace filters duct taped to the intake side, makes a significant difference in the amount of "fines" floating around. Not scientific, but works for me.

[Adam]

What about oiled filters.  They are used for high volume of air with good filtaration on cars has anyone adapted them for woodworking?

[socrates]

I don't think that idea would be very practical for woodwork, dust sticks to oil, clogging filters. The average driver doesn't drive through dusty conditions remotely near what goes on in a workshop. Plus a DC moves a lot more air than your motor would be pulling in.