| The Airpura
High Efficiency Filtration System
The pre-filter
traps larger dust and particles. It may be vacuumed from the exterior
of the unit. It acts to stop the larger particles such as dust and
lint from clogging the other filters.
The activated carbon bed
adsorbs airborne chemicals, gases and odors. Many air purifiers
offer only a spray of carbon sprayed on the pre-filter. This is
only sufficient to capture a small amount of gases and odors and
soon fills up.
Airpura carbon filters have from 18 to 30 pounds
of activated carbon that will trap 60% of its own weight in airborne
chemicals, gases and odors. They will keep on adsorbing harmful
chemicals for 24 months in typical use.
The 2 Micro-supress filters
on each side of the carbon bed kill microbes that may collect on
them.
The true HEPA filter
traps airborne particles. These filters were developed by the Atomic
Energy Commission to trap radio-active particles. They can capture
99.97% of particles as small as 0.3 microns. That is as small as
some bacteria.
Adsorbtion
with Activated Carbon
Activated Carbon is the only safe, cost effective
way to trap noxious gases and odors
Activated carbon has been treated with oxygen
to open up millions of tiny pores between the carbon atoms.
There are so many of these spores that one pound of activated carbon
has a surface area of 60 to 150 acres.
Activated carbon is the substance that keeps military personnel
safe from poisonous gases. It is also used for water filtration.
Adsorbtion is the process where certain chemicals are attracted
to activated carbon and then bond to it. The millions of pores in
the activated carbon provide an enormous surface area to trap these
chemicals.
The bigger the filter, the more chemicals it
adsorbs and the longer it keeps on working
An activated carbon filter acts rather like a sponge. When it is
full it can adsorb no more. The more carbon you have the more you
can adsorb before changing the filter.
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