How HEPA Air Filters
air filters are made from very tiny glass fibers that are made into a
tightly woven paper. This creates a filter consisting of a multitude of very
small sieves that can capture extremely small particles, including some
biological agents. Once trapped, contaminates and particles are not able to
flow back into circulation, due to the highly absorbent pores of the HEPA
HEPA Air Filter
Facts & Effectiveness Studies
HEPA air filters remove 99.97%
of particles down to 0.3 microns in size, almost 300 times smaller than
the width of a human hair.
HEPA air filters were developed
by the Atomic Energy Commission during the second World War. They were
originally designed to remove radio active dust from their plants.
HEPA air filters are
recommended by the
Dept. of Homeland Security.
Journal of Hygiene
study found that ionizers increase efficiency of HEPA air filters. The
EnviroFry 6 step air purifier offers an ionizer and a germ-killing UV
light in addition to its true HEPA filter.
A study by Air & Waste
Management Association found the combination of a HEPA air filter and
germicidal UV lamp reduced bacteria by 80% in a 3072 cubic foot chamber.
Purification Technologies Comparison