Skip to the main content.

3 min read

Air Purifiers & Covid-19

Air Purifiers & Covid-19

As people seek any means to protect themselves and their families from the spread of Covid-19, many are asking, “Do air purifiers kill viruses” like Covid-19? 

According to the United States Environmental Protection Agency, air purifiers can improve indoor air quality in spaces without access to outdoor air. Specifically, they reduce the concentration of virus-carrying particles in the air, which is why their popularity is on the rise. 

The Centers for Disease Control and Prevention also advises that an air purifier protects against coronavirus by reducing the density of virus particles in indoor spaces. Though air purifiers cannot substitute outdoor air, they can reduce the concentration of airborne particles that may be carrying coronavirus.


Can Air Purifiers Protect you from Covid-19?

While no study has conclusively proven or disproven air purifiers kill Covid-19 in the room, experts do agree that having an air purifier for Covid-19 can be highly beneficial in the fight against viruses. That said, it isn’t a silver bullet, it is something that must be teamed with wearing a mask and physical distancing.

Learn more about Indoor Air Quality


Choosing Air Purifiers for Covid Protection

Not all air purifiers are equally effective at removing coronavirus from your environment. According to the EPA’s air purifier coronavirus guidance, there are few requirements to keep in mind when selecting portable air purifiers for Covid:

  • The size of the room they will be placed in;
  • The CADR rating of the purifier;
  • That the purifier uses a HEPA filter (or is manufacturer certified to remove particles smaller than 1 micron).

Consider the following factors when you are choosing an air purifier for viruses for your space.

      1. Size of the space

The size of the room it will be used in is important because different air cleaners and air purifiers are effective only up to a certain size of room, measured in square feet. While most commercially available air purifiers should be able to work effectively in an average sized room, double-check the measurements of your space. A better alternative is installing a portable air purifying unit, like the AirFixture CleanAir Tower. 

      2. Avoid ozone generators

The EPA also recommends avoiding air cleaners that generate ozone. While ozone particles are able to eliminate biological air contaminants like virus particles, concentrated ozone can be dangerous, and this method should not be used in spaces with occupants.  

      3. Check the CADR rating

In addition to selecting an air purifier with a HEPA filter, an air purifier that kills viruses should also be CADR rated. CADR, or Clean Air Delivery Rate, essentially measures how quickly the air purifier is able to process air at its highest setting. 

Air purifiers have different CADR ratings for smoke, dust and pollen, reflecting their effectiveness for different sizes of particles. According to Consumer Reports lab tests, they recommend an air purifier for Covid-19 must have a CADR over 240, meaning it’s able to process the air five times per hour in its recommended size of room.


Do HEPA Air Purifiers Kill Viruses?

Air Purifiers and Covid-19

Though studies have yet to show conclusively that air purifiers destroy viruses, they have been shown to filter different types of viruses. Instead of capturing the virus itself, air purifiers capture the particles that carry viruses.

99.97% HEPA filters capture most airborne particles as small as 0.3 microns

In particular, a true HEPA filter would be the ideal air purifier virus-killer. A ‘High-Efficiency Particulate Air’ filter, HEPA filter, is made of ultrafine polypropylene or fiberglass fibres. These are certified to capture at least 99.97 percent of airborne particles as small as 0.3 microns.

The New York Times also reports that HEPA filters are effective at removing particles as small as 0.01 microns. As such, they do provide some measure of air purifier Covid-19 protection.


do air purifiers help with covid?

In the end, whether air purifiers can kill Covid-19 depends on a number of factors: the type of filter, size of the room, number of occupants, to name a few.  What is clear is that air purifiers that use a HEPA filter for virus protection are an effective layer of defense. Not only do they filter out coronavirus carrying particles, they improve indoor air quality too. 

What’s important is that the HEPA air purifier should be able to filter the air before you breathe it. Unfortunately, many buildings in the U.S. use “mixing ventilation” systems, in which air is introduced and extracted from the ceiling. This causes virus carrying particles to linger longer in the air.

That means a solitary air filter on the far side of the office is unlikely to protect you adequately. Make sure all occupants have an air purifier near them and use them at a higher setting for maximum air purifier virus and bacteria removal.

Work With AirFixture and Improve Your Indoor Air Quality

Are you looking to add air purifiers to your premises?

Find out how best to deploy air filters across your premises, by getting in touch with AirFixture today. Our seasoned experts can expand further on our CleanAir Tower, a mobile air purification unit that can combine Bi-Polar Ionization, UV Light and HEPA air filtration to eliminate contaminants. 

Join the hundreds of customers around the world that trust Airfixture for their air purification needs.

The Best Energy Efficient Air Purifiers

The Best Energy Efficient Air Purifiers

So you’ve decided that you want to prioritize your health by cleaning that dirty air in your home or office - but you don’t want to rack up your...

Read More

Indoor Air Quality and Floor Air Distribution

Indoor Air Quality Directly Impacted by Floor Air Distribution

Read More

Sustainable Office Buildings: 7 Ways UFAD and Raised Floors Can Help the Environment

The demand for environmentally-sustainable buildings is growing exponentially. The number of LEED-registered projects in the United States rose...

Read More