The
use of electrical fields and discharges has long been
known to address both of these issues. The improvement
of filter capture through the application of electrostatic
fields is well established. Polarisation effects brought
about by an electrical field produce an attractive force
between particles and filter fibres resulting in significantly
enhaanced filter efficiency, especially for small particles.
Allowing a porous, low-pressure drop filter to be used
for high efficiency service.
The plasma filter
was primarily developed for hospital applications where
high efficiency filtration and sterilisation are both
needed and where lower pressure drop operation is desired.
Due to the plasma filter being extremely effective at
removing air borne contaminates, including fine dust,
pollen, mould spores, dust mites, paint fumes and tobacco
smoke; there has been considerable interest for office
building, clubs, pubs and school market sectors. This
has proved to be effective against sicknesses induced
by airborne organisms.
Another major advantage
to this form of air conditioning is the ease with which
the filters may be cleaned and maintained. As long as
this excercise is carried out under regular maintenance
supervision, these filters will last many years with
no drop in performance.
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