High Efficiency Particulate Air filter

1. Understanding High Efficiency Particulate Air filter

2. HEPA filters have revolutionized the world of air purifiers for most allergy sufferers. HEPA (High-Efficiency Particulate Air filter) filters were designed to remove at least 99.97% of airborne particles down to 0.3 microns in size which are the most difficult particles to filter.

3. With this percent of particle reduction, it's not hard to see why so many people suffering from allergies benefit greatly by the use of one. Allergy sufferers can rest assured that the airborne contaminants in their air are being removed thus relieving allergy symptoms and allowing for a better quality of life within the home.

4. To better understand this type of filter, take a closer look at their technology and make -up. HEPA filter are composed of randomly arranged fibers on mat-like surface. This random arrangement of fibers allows for more particle to be trapped within them.

5. The filter uses three different methods to capture particles down to 0.3 microns in size: impaction, interception and diffusion. Impaction is when the larger particle are simply unable to avoid the fiber and thus are forced embed themselves into one directly.

6. This effect increases with higher air flow and smaller fiber separation. Interception occurs when particulates, following the flow of air, come within close proximity to a fiber and adhere to it.

7. Diffusion is an enhancing mechanism that is the result of the collision with gas molecules, by the smallest particles, which are thereby impeded and delayed in their path through the filter.

8. This action increases the chances that a particle will be stopped by any of the above mentioned methods. With these three levels of screenings is it easy to see how 99.97% of particles down to 0.3 microns in size are captured and held within this incredible filter that has been around for years.

9. The HEPA filter has a long history of use and research- another reason why allergy sufferers can be confident that by purchasing one, their symptoms will become less severe or even non-existent.

10. The first of these filters was designed in the 1940's and was initially used to prevent the spread of airborne radioactive contaminants. The filter was commercialized in the 1950's, and the name became a registered trademark in the business along with a generic name for any highly efficient air filter

11. Over the years, the filters have evolved to accommodate the constant demands for better air quality in various technologies, such as pharmaceutical processing, hospitals, aerospace, nuclear power and computer chipping.

12. Today, a HEPA filter rating is applicable to any highly efficient air filter that can attain the same filter efficiency performance standards as the ones mentioned above. They must be able to remove 99.97% of particles down to 0.3 microns in size.

13. The highest efficiency air cleaners, widely available today, remove 0.3 micron (1 micron = 1 millionth of a meter) sized particles at a minimum of 99.97% efficiency." Hospitals widely use them as they are critical in the prevention of the spread of airborne bacterial and viral organisms thus reducing infection.

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