notbob wrote:

On 2010-08-04, Jim Elbrecht wrote:

So far all I've seen is your opinion.

DOH!! Ya' got me!

I, who've worked with/around HEPA filters for years, couldn't possibly
know as much as you, who, with the irrefutable qualification of having
absolutely NO experience whatsoever with HEPA filters, disagrees with
my "opinion". I'm sure all ahr readers will gladly bow to your
overwhelmingly superior logic in this matter. Yeah, verily, Jim has
spoken. Go forth and buy HEPA!!

nb

You seem to be confusing "HEPA filter" with "clean room". HEPA filters
are used in clean rooms, but they are also used elsewhere. The use of a
HEPA filter alone does not make the environment a "clean room", nor does
an environment which is not a "clean room" mean that the filter used
there is not a "HEPA filter".