HEPA air purifier filters, defined as “high efficiency particle arresting” were developed originally for the U.S. Atomic Energy Commission to remove radioactive particles from the air in the 1950’s. However, modern HEPA filters are now used to clean rooms by removing many of the airborne substances that live inside.

HEPA air purifier filters are polymer or paper sheets, with tiny passages that allow air to pass through the material while retaining everything else in the filter. Since the passages of the filters are designed very small, you will need larger surface area to provide the necessary airflow that must pass through the filter media. For this reason, HEPA air purifier filters can be purchased in zigzag or accordion styles to tackle large surface areas even in a small volume.

Since the introduction of these kinds of filters in the 1950’s, HEPA air purifiers still make use of this technology in cleaning indoor air.  For this reason, many doctors recommend the use of air purifiers that integrate HEPA technology to help patients that suffer from asthma and allergies. These filters will allow people to avoid harmful airborne particles and alleviate the symptoms that are associated with their conditions.
How do HEPA Air Purifiers Work?
The HEPA filters allow extremely tiny particles to pass through the media. However, compared to other air-purifying filters, the style of a HEPA paper can get twice the airflow without the need of replacing the filter often. Some HEPA papers are designed with over 30 square feet of materials folded into sections to ensure a longer filter life and effective filtration of particles.
HEPA filters can trap particles in three ways. First, once the particles interact with the fiber, they stick to the filter. Second, particles that successfully pass one diameter of the fiber will become stuck when they try to slip away from the rest. Lastly, particles that move away from the filter can slide closely to the fiber to get caught eventually. As a result, HEPA air purifiers can stop bacteria, molds spores, dust and germs effectively.
Most HEPA air purifiers guarantee a 99.9% effectiveness rating in cleaning the air by removing particles that passes through the HEPA filter. On the other hand, these purifiers cannot remove chemicals, gasses and odors, because all gas molecular substances can pass through the filters easily. For this reason, you should be aware that the guarantee provided by companies for their air-purifying products may not be completely accurate, since every factor is rarely taken into consideration.

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