Cleanroom technology Was: hard drive data recovery

From: Lawrence Walker <>
Date: Thu Jul 16 10:02:15 1998

> At 18:51 14-07-98 +0000, you wrote:
> >Allison (>>) and Tony (>) wrote:
> >
> >
> >BTW, I have two questions. What does HEPA stand for? And (Christian
> A HEPA filter is: High Efficiancy Particulate Air filter. A HEPA filter is
> built so that 9.97% of particles 0.3 micron and larger are removed from the
> air passing through. You see HEPA filters more and more in consumer related
> things (at least I have in the States). Example: Air filters in many modern
> automobiles, possibly all autos, use a HEPA filter for engine air intake
> filtering. Clearances between engine parts are closer nowadays which
> improves engine performance and efficiency plus smaller engines are
> stressed harder in relatively large modern cars, both thus requiring really
> clean air intake.
> Also, I think I've seen an advertisement for a fancy grade household vacuum
> cleaner advertising it has a HEPA filter on its exhaust. Less allergens
> blown about. We use Nilfisk-brand cleanroom vacuum cleaners at work. Made
> in Denmark I believe. Cost around US$1000 each but they're meant for use
> *in* cleanrooms and *must* not throw junk about from their exhaust.

 Do you remember the brand-name by any chance ? I have a couple of Filter Queen
vacuums that have 2 filters and supposedly "cleans" the air emitted via an
exhaust port that can be used for vapor or spray painting accessories.

ciao lary
Received on Thu Jul 16 1998 - 10:02:15 BST

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