Subject: Plans for a dust filtration unit?

From: [email-masked] (Steve Rehrauer)
Date: Tue, 11 Feb 1997 17:59:22 GMT

(By this I don't mean a dust collector, but the kind of fan-in-a-box
unit that typically gets hung from the ceiling, to remove fine dust
>from  the air.  For now, I can live with a shop-vac and sweeping up,
but the fines are killing me.  Well, more like my wife will kill me
if I don't put a stop to them.)

I've seen some commercial units, and I believe I've seen a kit in
(I think) the Woodsmith catalog that included the blower.  To save
money, I'd like to try scrounging a used motor and building one from
scratch.

Is it as simple as building a box with a switch? :-/  Are there gotchas
I should avoid?  (Beyond things like building a box too small for the
motor, obviously. :)  Anyone done this recently?  Or seen plans for
something like this?  Thanks in advance!
-- 
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All software is bug-free, assuming          | Steve [email-masked]
 sufficiently clever definitions of         | Massachusetts Language Lab
 "feature" and "expected behaviour".        | USDA Zone 5, more or less

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From: [email-masked] (RodWSheets)
Date: 11 Feb 1997 21:55:40 GMT

I built one of these recently -except mine is on wheels and doubles as a
sanding table. I think I got the plans from Shop Notes. It works ok but
not great. It turned out louder than I hoped - (it doesn't hurt the ears
but is just loud enough to 
annoy me). I keep wondering if I did something wrong because the suction
is not very great but I guess its ok. Its not the "be all and end all"
that I hoped.

Rodney Sheets([email-masked])

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From: yvan & debi lacroix <[email-masked]>
Date: 12 Feb 1997 01:16:51 GMT

>something like this?  Thanks in advance!
Steve.  
I built mine using 8 4" computer fans ($2.00 each surplus) that 
develope 80 cfm each. They are very quiet and I was able to 
orient them in different directions to promote air circulation. 
As for filters I use furnace filters for the primaries and the 
flat & square automotive air filters used in the newer cars for 
the main filters. My box is 12" x 24"x 30" with 2 12x24" filters 
and 4 5x11" car filters. It works great and cost me $60.00 total.

If you need more detail E-mail me at [email-masked]

Thank you     Yvan

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From: Dave Tardiff <[email-masked]>
Date: 13 Feb 1997 17:19:04 GMT

Here's an ultra-simple dust filter, especially
suited for demolition work outside your shop:

    Go to your favorite supply store.  Buy one of those
cheap box fans, approx. 20" by 20" by 6".  Should cost
about $15 max.  Wander over to the heating section, and
get a half-dozen furnace filters in a matching size (20x20,
I think - I can't remember the actual number right now.  Just
hold up the filter next to your box...). Cheap filters are
maybe $1 each.  Grab a roll of duct tape on the way to the
checkout.

    Take the 6 filters, stack 'em, and duct tape them (at the
corners will do fine) to the INLET side of the box fan.  Put
the fan where your dusty air is, plug in it, and turn it on.
You're done.  The air will be cleaner immediately, and visibly so.

    After a while, take off the first filter (the dirtiest) and
chuck it, and add a new clean one to the fan side of the stack,
and tape 'em back in place.  Repeat as needed.