Can Air Purifiers
with HEPA Filter
Capture Coronavirus
Can Air Purifiers
with HEPA Filter
Capture Coronavirus
Since the coronavirus outbreak, many have wondered whether Air Purifiers with the HEPA filter protect against the virus. The answer is yes and no. However, one thing is 100% sure - they do help reduce the risk of COVID-19. To find out how to protect yourself and your family, you need to understand how the units work and what they do against the virus itself. Without further ado, let's make things clear right now.
What is a HEPA filter and how it works?
The abbreviation stands for High-Efficiency Particulate Air. The technology was designed to maintain cleanrooms for atomic energy development. It was created by the U.S. Department of Energy as the requirement for providers of filtration units based on the percent, efficient for removing particles (i.e., 99.97% at 0.3 microns and above).

Basically, the HEPA filtration is a physical thing: a fan circulating at high speed draws particles from the air via a felt-like filter with holes of different sizes. Its fibers capture airborne particulates in three ways. All differ according to the particulates' sizes (i.e., for about o.5 micron and above, impaction is effective.) Since it's the COVID-19 virus protection we're talking about, it's diffusion that we need to focus on. But before explaining this physical phenomenon, let's talk about the size of COVID-19 particles.
Do HEPA filters capture the virus?
Scientists have already measured the size of the COVID-19 "virions" or particles. Their diameters are about 125nm or 0.125 microns; the smallest ones are 0.06 and the largest ones are 0.14 microns. Herewith, HEPA filters must remove 99.97% of particles with the size equal to 0.3 microns or bigger.
Anyway, does the capturing happen? This is where diffusion comes in. Very small particles, notably those below 0.1 micron, haphazardly get bounced around and "cooled down" due to their contacts with atmospheric atoms and molecules, and eventually get trapped upon a filter fiber. As a result, all particles get caught fast, while airflow is a bit sabotaged. That way, this diffusion does a great job of capturing virus-sized particles.
So, technically HEPA filters are incredibly effective in protecting against the coronavirus. Moreover, NASA has confirmed that HEPA filters catch " virtually 100% of particulates". Also, some Air Purifiers with the HEPA filter have proved to capture the H1N1 flu virus and respiratory bacterium like Staphylococcus aureus.


Here's the truth you need to know about air purifiers and coronavirus. The latter is not airborne by nature. In other words, it might not get to the filter to be removed straight away. Experts say that the coronavirus is transported due to a physical contact between people. Another way - by contacting with virus-laden droplets as a result of a sick person's sneezing or coughing. In fact, such droplets travel only around 6 feet before landing on surfaces. This makes the air not the primary source by which the virus spreads.

However, according to the recent study of the Research University of California, the COVID-19 can stay viable and be floating in the air for about three hours. So, as it becomes clear from the above, HEPA Air Purifier has all the chances to reduce the spread and capture the COVID-19 virus.
What is more effective - face masks or HEPA Air Purifiers?
Certainly, face masks like N95 respirator offer some protection. However, the coronavirus particles are tiny enough to pass through most surgical masks filters. The latter help prevent spreading mouth-borne germs from one person to other people and to surfaces. Yet, their size does not allow filtering fine particles less than 2 microns. Besides, the leakage usually happens around the edge of the mask which is less protected.

N95 respirators filter out most airborne particles but again - with their size being down to 0.3 microns in diameter. Even if worn properly, the respirator allows the minimal leakage around the edge.

On the other hand, a top-quality HEPA Air Purifier can help filter out virus-sized particles and reduce your chances to catch the COVID-19.

Obviously, it is not comfortable to wear masks at home. So, it would be more reasonable if you put on the mask when you're outside and turn on a HEPA Air Purifier when you're at home.
Air Purifier
Respirator N95
Level of protection
  • 99.97% of the particles above 0.3 microns
  • 95%-99% - below 0.3 microns
95%-99% of the particles down to 0.3 microns
Matters to filter out
  • mold, dust, dander and other allergens
  • smoke, bacteria, germs, and microbe
  • most airborne particles
  • mouth-borne germs spread from one person to another
Action time
3000 hours*
*HEPA filter needs to be replaced twice every six months
8 hours avg
Convenience of use
at home
So, how do True HEPA Filters help against the COVID-19?
Since many countries have announced the quarantine and doctors recommend self-isolation, a HEPA air purifier helps lower the spread of the COVID-19 virus significantly.

For example, PurOxygen P500 Air Purifier comes with the HEPA filter. The brand claims that it captures 99.97% of the particles above 0.3 microns and 95%-99% - below 0.3 microns. Thus, potentially it can filter out up to 99 percent of the COVID-19.

The unit needs 2 hours to clean the air in the space of up to 550 square feet. Besides the COVID-sized viruses, it removes 99.98% of airborne pollutants that float in the air and settle down on surfaces. These are mold, dust, dander and other allergens. It also deals with smoke, bacteria and microbes. As for the placement, to make the performance as effective, as possible, it is recommended to keep the distance between the air purifier and any object in a room to at least 4 inches.

Besides, the model features a 6-level enhanced purification. It consists of 6 filters each working on neutralizing a particular type of contaminant. These are a pre-filter, the HEPA filter, the activated carbon air purifier (absorbs smoke and chemical reactions); the cold catalyst filter (decomposes different harmful gases), the negative ion generator (besides filtering, eliminates the debilitating effects of extra positive ions in the environment), and the UV light sanitizer (neutralizes germs, bacteria, viruses and allergens). This high-performance air purifier contributes to the overall protection of the immune system, whose state is a key factor of the resilience to COVID-19.
How else does an air purifier benefit your immune system?
According to the Johns Hopkins Medicine, people with lung disease (amongst heart one and diabetes) are the most vulnerable to the coronavirus. Thus, using a HEPA air purifier as a preventive measure is particularly on point right now. So is it for the whole immune system improvement.

An air purifier does the following:

  • Alleys allergens that trigger allergic reactions.

  • Alleviates asthma and other inflammation processes in lungs.

  • Relinquishes radon gas that causes lung cancer.

  • Expels external pollutants like diesel exhaust.

    In the condition of living in an "IN-vironment" nowadays, the HEPA filter's capacity for cutting out Carbon Dioxide (CO2 we expel) means the world.
    Here are other ways to protect yourself and your family against the coronavirus:

    • Air out the space when the air purifier is off.

    • Wash your hands with hot water and soap for 30 seconds - do it often, essentially after going to the restroom, before meals and after cleaning your nose, coughing and sneezing.

    • When going outside, use hand sanitizer with 60% alcohol.

    • Avoid a close interaction with people and keep the distance between to 6 feet.

    • Stay home if you feel sick.

    • Do not touch your mouth, eyes, and nose.

    • Wear a mask when outside.

    • Clean surfaces in your home with a household cleaner.
      Important: PurOxygen does not give any medical advice. Consult your healthcare provider about recommendations.
      Keep the environment healthy with PurOxygen!
      PurOxygen P500