| n the last few decades, everyone has become | | | | called a HEPA filter can do this. HEPA stands for |
| aware of the problem of pollution, and in many | | | | high efficiency particulate air. HEPA filters have |
| cases, great strides have been made in combating | | | | been a popular choice for air filtration for decades. |
| it. Urban waterways have become much less | | | | However, HEPA filters do not remove the |
| polluted in the United States over the past forty | | | | particulates that are smaller than 0.3 of a micron |
| years, and air pollution has in many cases been | | | | in size, and these particulates are the worst for |
| reduced using such measures as controlling | | | | your health. They include viruses, fumes, and |
| emissions from automobiles. However, many | | | | smoke. For these, your air purification system |
| people do not realize that air pollution is a more | | | | should include mechanism that uses ultraviolet light |
| serious problem indoors than outdoors. Because | | | | to break down the DNA and RNA of tiny |
| of the pollution that can exist inside buildings, | | | | microorganisms and thus sterilize them. |
| business owners and homeowners should look into | | | | The ultraviolet method does not get rid of odors |
| air purification using air filters. | | | | and gases, though. For that you should consider a |
| There are many types of air filters, and which | | | | carbon filter. It uses activated carbon, which is |
| type you use depends on what kind of pollutants | | | | carbon that has been super heated with the result |
| you are trying to reduce or get rid of. For | | | | that it is extremely porous. Even the smallest of |
| example, if you are trying to get rid of allergens, | | | | gas molecules are then trapped in these pores. |
| you need a filter which removes big particulates | | | | This kind of filter, used in combination with a |
| like pollen using a pre-filter, but also removes | | | | pre-filter and HEPA filter has been found to be |
| smaller allergens between 0.3 and 5 microns in | | | | the most effective method there is for air |
| size, such as bacteria and animal dander. What is | | | | purification. |