| Hygienic air is essential to human life, and in this | | | | that traps pollen, dust particulate, smoke and |
| modern age, that requires air cleaners. There are | | | | air-borne irritants and pet dander. The best |
| a few different methods of air cleaning, like | | | | example of this type of filters is HEPA (High |
| Filtration, Electro-static Precipitation and Ion | | | | Efficiency Particulate Air) filter. |
| Generation. Air Filtration cleans air through the | | | | Gas Phase Filters |
| removal of sub-micron particulate, gases and | | | | These air filters are used for removing odors and |
| odors. If you are plagued by allergies or asthma, | | | | other types of pollutants such as gases from |
| an air filter might help you. Air filters are the best | | | | cooking, paints, perfume etc. These filters are not |
| tools for eradicating allergens from the house. | | | | meant for the removal of allergens in the home. |
| Particularly for those people who are suffering | | | | Electronic Filters |
| from asthma and allergies, both the U.S. | | | | In these types of filters, allergens are trapped |
| Environmental Protection Agency (EPA) and the | | | | through electrostatic precipitators with a fan. |
| American Lung Association recommend air | | | | Electronic filters use electric charges to attract |
| filtration. | | | | contaminants. |
| The ability to remove allergens and contaminants | | | | Hybrid Filters |
| depends on the amount of air drawn through the | | | | These air filters combine electrostatic and |
| filter. Factors that affect filter efficiency include | | | | mechanical filters. These are used to trap allergens |
| fiber size, fiber density, airflow rate, and particle | | | | rather than gas based contaminants. |
| diameter. Air filters may be centralized, in-home | | | | Another type of air filters is the Ozone air filter, |
| filtration systems or portable devices. When the | | | | but it is not environment-friendly. |
| air quality problems exist throughout the house, | | | | When purchasing an air filter, one has to consider |
| then a centralized filtration system is needed. | | | | things like which type of allergens will be removed, |
| Otherwise, portable cleaner may serve the | | | | the filter's efficiency with respect to HEPA |
| purpose of air filtration. | | | | standards, the clean air delivery rate (CADR) of |
| There are four major types of air filters, | | | | the filter, the ease of changing the filter, and the |
| depending on specific needs. They are: | | | | noise that it will make. Changing air filters regularly |
| Mechanical Filters | | | | facilitates is ability to improve the quality of air. |
| These filters force air through a special screen | | | | |