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As Americans grow more
concerned about the air they breathe the demand for air purifiers constantly
rise. The air purifying industry has not missed this rising interest and
they are now flooding the market with all sorts of air purifying gadgets.
Each comes with special features and new promises. However if we go to the
basic technology behind all these various models we will notice that air
purifiers are actually of three main varieties.
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Ionic air purifier
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HEPA air purifier
and -
Ozone air purifier
There is also a fourth variation - the UV air purifier but these mostly come in
combination with the HEPA air purifier.
Ionic Air Purifier: This variety of air purifier works on a principle which
seems to be inspired from how static electricity actually draws particle towards
itself. In an
ionic air purifier there are charged sheets inside which actually
draws the neutrally charged particulates from the air. Although this works with
bigger particulates, it tends to miss out on a whole lot of other pollutants
present in air. So such purifiers are very basic and improve the quality of the
air partially.
HEPA Air Purifier: these purifiers are much more advanced than the ionic air
purifier. In fact HEPA air purifiers actually filter the air inside rooms. A
HEPA air purifier draws in the air from the room, filters the particles present
in the air and then releases the cleansed air. A HEPA filter is good enough to
capture particulates as small as 0.3 microns. Such levels of purification is
truly remarkable and even hospitals use HEPA air purifiers.
However, there are a number of particulates, especially organisms including a
few bacteria, viruses and germs which are less than 0.3 microns. For such
organisms the UV air purifier has been introduced. They either come with HEPA
air purifiers or they are stand alone machines. The UV air purifier emits UV
light which actually alters the DNA and RNA of the microscopic organisms so that
hey are sterilized and cannot continue to multiply inside our body.
Ozone Air Purifier: This is perhaps the most controversial of all air purifier
as many think that constant exposure to ozone at close proximity cannot be good
for the human body. However, there are believers too. This purifier actually
releases ozone in the air. The third oxygen atom of the ozone gets detached and
combines with the particulates while the remaining two are released as an oxygen
molecule in the air. Oxygen works as a cleaning agent.
by : Jason
Uvios
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