Clean Air Through Filtering

[KF Etzold <etzold@xxxxxxxxxx>]

I had sent this directly to gcornwel.erol.com but it got bounced back. So, even
though it fairly specific, maybe other people are interested.
K-F Etzold

Clean Air: This is something needed in an some industrial environments and
usually involves building "Clean Rooms". Clean rooms are common in
semiconductor and disk drive manufacture where particles cause defective
devices. These rooms are typically specified by class, say class 100, for the
degree of filtering used. The finest filters will also remove bacteria. The
kind of filters which are used are called "HEPA" filters which stands for High
Efficiency Particulate. Typically clean rooms are built with special walls and
floors which do not emit particles and which are easy to keep clean. Typically
it is also desirable to have a special air flow pattern which requires a
perforated floor. This would be questionable for aestestic reasons in a
residence. Also the cost is outlandish but clean air can be had. Of course, one
can always scale down to say class 1000 or lower  but you have to decide how
much is enough (cost and aesthetic considerations).
Any questions ... contact me.
K-F Etzold
ETZOLD@xxxxxxxxxx