What Is Hepa In An Air Purifier
Author: Louise Wasa

An air purifier is an appliance used for cleaning air indoors
and they are used in homes, commercial buildings, industrial
workplaces etc. The application of air purifiers is usually in
places which tend to have unhealthy air due to pets, molds,
pollutants, smoke or industrial work, hazardous materials etc.
Air purifiers are also popular in homes of allergic people and
asthmatics who wish to keep the air healthy in their homes.
They are also popular due to the fact that the air inside homes
is less healthy than the air outside.
Since people spend a significant amount of time indoors having
an air purifier is healthy.

Allergic applications

Air purifiers are most popular for asthmatics and allergic
people and they work by keeping allergens and triggers out of
the air in homes. Allergens or triggers can be dust, pollen,
mold spores, fungus, pet hair, smoke particles, airborne gases
etc.

Functioning

Air purifiers employ various techniques for air purification
like absorbents, ionizers, mechanical filters etc. Absorbents
can be in the form of activated charcoal and ionizers can be in
the form of electrostatic chargers. Some air purifiers have
additional systems like germ killing UV light, ionizer for
neutralizing contaminants.

HEPA filters

HEPA is an acronym for High Efficiency Particulate Air. HEPA
filters are very popular for air purifiers. Before being
designated as HEPA, air purifiers must meet very stringent
requirements as laid down by the Department of Energy. HEPA
filters should remove at least 99.97 % of air borne particles
of 0.3 micron size at 85 liters per minute rate. However HEPA
filters are very expensive and replacing the filter in the
purifier may cost as much as the purifier itself. Further HEPA
filters cannot remove gases or odors from the air. For removing
gases absorbent type of air purifiers are suitable.

Ozone

Some Ionic air purifiers produce ozone in the delivered air.
Ozone can be dangerous at higher concentration, which is the
cause of a controversy. However ionic air purifiers are
associated with healthy air environments such as waterfalls,
mountains etc, since these places have a negative ion
concentration as in ionic air purifiers. An ionic air purifier
in conjunction with an air filtration system is suited for most
purposes.

What to look for

Customers usually look for aesthetic appeal, noise levels, size
of the equipment, frequency of filter replacement, electricity
consumption, air delivery rate etc. Most of the filters can be
cleaned easily by vacuuming, by water or by hand. The filters
may need replacement anywhere between months to a few years
depending upon the type of air purifier.


About The Author: Louise Wasa always writes about valuable news
& reviews. A related resource is http://about-air-purifier.info/
Further information can be found at http://the-new-economy.info/