Guide To Home Air Purifier System
~ How Do Air Purifiers Work ? ~
Do you know that there are different types of home air purifier system ?
Yup, different home air purifiers have different
air purification system. In other words, different air purifiers work differently. If want to shop for one, but don't know how air purifiers
work, then it is time to educate yourself on the different kinds of home air purifier system available.
But why is it important ? Isn't it enough to know what it is capable of doing without really knowing how a particular air purifier does
all the work ?
While some air purifier shoppers shop this way, we think it is very important to be well-informed on air purification systems behind a
home air purifier.
The main reason is because each air purifier has different air purification technologies which are pertinent to
what it is supposed to do. Thus, an air purifier marketed for removing volatile organic compounds has different air purification system
from the ones marketed to remove bigger air particles only. Therefore, to get the right air purifier for you, you must know exactly what home air purifier system
employed by a particular air purifier and what contaminants it removes.
The second reason is, all purification technology have drawbacks; some minor and some major. The major drawback on certain air purification technologies
which cannot be ignored is ozone emission, because it affects the safety of the user. While ozone is desirable in our stratosphere, it is
a major lung irritant when it's present in our atmosphere. Therefore, you would want to avoid buying ozone-producing air purifiers.
So, how do air purifiers work ?
Basically, there are several types of home air purifier system employed by air purifiers:
First, is the filtration technology
An air purifier with filtration technology has a filter which arrests airborne particles which are bigger than its pore. A specific
type of filter called High Efficiency Particulate Air (HEPA) filters are capable in capturing airborne particles bigger than 0.3 micron
and in many cases are also effective in removing particles down to 0.01 micron, for instance: mold spores, pollen, bacteria, or others.
The only particle it cannot remove is gas, including odor-causing gases and smoke. Therefore, if you also want to remove smoke or a
particular gas from the air, it is important to get a home air purifier which has an air purification system designed to capture gases
(activated carbon or chemical).
HEPA filters are one type of home air purifier system commonly used in both HEPA air purifiers and as furnace filters. They are quite
expensive. But its life can be prolonged by the use of a prefilter which is placed such that the air passes through a prefilter before it
passes a HEPA filter. That way, coarse particles are removed first by a prefilter, enabling HEPA filter to deal only with cleaner air.
If you want to learn more about this type of purifier, go to HEPA air
purifier article for more on this.
Second, activated carbon
Gas or smoke air purifiers work by incorporating activated carbon as gas or smoke absorbant.
Basically, activated carbon is porous material which can absorb smoke and gases. However, in order for it to make any difference, the
amount of carbon should be at least 5 lb.
This home air purifier system is used as an add-on, so you won't find any air purifier which has this technology alone. Thus, after
big particulates are removed by prefilter or other filtration system, clean air is then passed through activated carbon which remove small
molecular weight particulates
Although carbon is effective against semi volatile organic compounds, it is not effective in removing inorganic gases and formaldehyde.
So, if you need to remove these compounds, you will have to get an air purifier which also contains certain chemicals designed to capture
For more information on chemical and carbon air purifier, click
Third, ionic air purifier
Ionic air purifiers work by emitting negative ions which then adhere to airborne particles. The negatively-charged particulates are
subsequently routed to various routes, depending on the type of ionic air purifier.
The simplest type of ionic air purifier is called ionizer air purifier. This type of air purifiers simply ionizes the air. It is assumed
that the ionized particulates will fall down because of the weight and then can be removed easily by a vacuum cleaner.
Other ionic air purifiers known as electrostatic air
purifier attract the negatively-charged particulates to positively-charged collection plate in the air purifier. Many people are
attracted to an electrostatic air purifier because it is quiet and is totally filterless. However, you will need to wash the collector
plate regularly in order for the machine to work effectively. A variation of this kind of purifier has a disposable electrostatic
disposable filter (media-filter) instead of a washable collection plate.
With ionic air purifiers, it is important to mention that purifiers which utilize this home air purification system have raised some
concerns because they emit small amount of ozone. Ozone, while it protects us from the sun in the upper atmosphere, is not actually good
for our health when it presents in our surrounding. It irritates lung and can therefore make asthma or lung problem worse.
Fourth, ozone generator
Ozone generator air purifiers work by producing large amount of ozone, a strong oxidant gas which can oxidize many other chemicals.
Originally, ozone generators are used in restoration and hospitality industry and are only used in unoccupied rooms. However, it has
somehow made its way into the home air cleaning domain. While the manufacturers try to convince public on the effectiveness and safety of
this home air purifier system, EPA remains doubtful of these manufacturers' claims. We, at www.airpurifiergalore.com, therefore do not
recommend our readers to buy purifiers which utilize such home air purification system.
For more information on ozone generator, click here.
Fifth, ultraviolet air purifier
UV air purifiers work by producing ultraviolet light. Like activated carbon, ultraviolet light is usually an add-on to an existing home air
purifier system and the primary purpose of the UV light presence is to kill off virus and bacteria.
Read on ultraviolet air purifier article for more
detailed information on this.
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