The COVID-19 pandemic isn’t going away any time soon, and as people begin to move indoors for the fall and winter seasons, it’s clear we need to do everything we can to protect ourselves, our families, and our communities. We know that spending time with people indoors is riskier than meeting friends outside since it’s difficult to maintain 6-feet between others and there’s much less ventilation. Air filtration will play a key role in the coming months as Canadians move inside, and it may be time to invest in an air purifier for COVID prevention.
Over a grueling first wave and long summer, experts have learned a lot about the transmission of SARS-CoV-2 (the virus that causes COVID-19). So, are air purifiers effective for COVID-19 prevention, and what do you need to look for?
How Does COVID-19 Spread?
At this stage, health experts believe a key factor in the spread of COVID-19 is through person-to-person transmission. This refers to people who are in close proximity to one another—within six feet. If one of these people is infected with COVID-19 and they cough, sneeze, speak, or sing, respiratory droplets are produced that can be inhaled by or land in the mouths and noses of those around them.
The CDC says, “the more closely a person interacts with others and the longer that interaction, the higher the risk of COVID-19 spread.”
It’s also extremely important to remember that COVID-19 can be spread by people who are not showing any symptoms—which means that simply sharing the airspace of someone unknowingly infected with COVID could result in you becoming infected yourself.
Surface transmission is no longer thought to be a major factor in the spread of COVID-19. In May 2020, the CDC updated its guidelines concerning the surface transmission of COVID. They stress that while it is possible that a person can become infected by touching a surface contaminated with COVID-19, it’s not “the main way the virus spreads.”
Thus far, the World Health Organization has been reluctant to claim the coronavirus is airborne. The CDC is currently updating its own recommendations regarding the airborne transmission of SARS-CoV-2. They originally released a draft of their updated guidelines in late September and seemed to confirm the virus is airborne, but they retracted that statement and will post updated language at a later date.
What we do know is how long particles can remain in the air. In July, The New York Times shared that “the coronavirus can stay aloft for hours in tiny droplets in stagnant air, infecting people as they inhale.” Not only can COVID-19 survive for hours in the air, but depending on a room’s airflow, temperature, and humidity, a cough can send respiratory droplets as far as 19 feet away, and a sneeze can send droplets up to 26 feet.
Are Air Purifiers Effective For COVID-19 Prevention?
Air Purifiers Reduce Viral Load
Just because you are exposed to COVID-19 doesn’t mean you’re going to become infected. Transmission depends on a number of factors, including the health of your immune system and how much of the virus you come into contact with. Viral load refers to the quantity of the virus in the air. Air purifiers constantly filter the air in your indoor space, removing virus particles so that if you do become exposed to the virus, you’re less likely to get sick because the viral load isn’t high enough to infect you.
Air Purifiers Reduce Air Pollution
There’s a clear connection between air pollution and coronavirus infections. A 2020 study concluded that “The highest number of COVID-19 cases were recorded in the most polluted regions with patients with more severe forms of the disease requiring ICU admission. In these regions, mortality was two-fold higher than the other regions.”
Poor air quality can make you more susceptible to catching the virus, and it could mean more severe consequences. While you can’t control the air outdoors in the city you live in, you can control the quality of air in your home and workspace. Air purifiers remove harmful air contaminants, including benzene, formaldehyde, dust, dirt, and smoke.
Air Purifiers Protect Your Immune System
If you do come into contact with COVID-19, you want to give your body every chance possible of fighting off the virus. Building and maintaining a strong immune system does just that. In addition to making healthy lifestyle choices, an air purifier protects your immune system by filtering out harmful bacteria, pollution, and chemicals.
Whether at home or the office, we are regularly exposed to volatile organic compounds (VOCs), which include a wide variety of chemicals found in paint, printers, cosmetics, some air fresheners, and many other household products. Quality air filters scrub the air, removing these chemicals so they can’t interfere with your immune health.
Choosing an Air Purifier For COVID-19 Prevention
Super HEPA Filter (0.1 Micron)
In order to properly filter airborne viruses and bacteria, such as the coronavirus, an air purifier needs to be able to filter smaller micron particles and microorganisms from the air. The size of the coronavirus is approximately 0.125 micron in diameter. A Super HEPA filter removes 99.9% of all particles at 0.1 micron in size, whereas a regular HEPA removes 99.97% of all particles at 0.3 micron.
Look for air purifiers with Super HEPA in order to filter viruses and bacteria smaller than 0.3 micron.
Activated Carbon Filter
Activated carbon filters are small pieces of carbon that have been treated to be very porous.
They’re designed to remove harmful chemicals, such as formaldehyde and benzene, from the air. HEPA filters and activated carbon filters need to work together. Only having a HEPA filter will mean chemicals that stress your immune system can pass right through.
A Germicidal UV Bulb is an electric light that produces ultraviolet C (UV-C) light. The short-wave ultraviolet light is proficient at neutralizing airborne germs, larger viruses, and mold spores by disabling their DNA. The most effective air purifiers have this technology working alongside a Super HEPA filter and activated carbon filter.
What’s the Best Air Purifier For COVID-19?
Look for an air purifier with a Super HEPA filter to ensure your unit is capable of properly filtering the coronavirus, which is approximately 0.125 micron in size. Your unit should have a deep-bed activated carbon filter to remove harmful chemicals that strain your immune system. Germicidal UV is also recommended, as this will kill airborne viruses and bacteria.
Follow recommendations based on the size of your space. Using a unit that’s only equipped for a small space when you need one for a larger room won’t be as effective, and it could leave virus particles lingering in the air.
Air Filtration Is Only One Aspect
Air filtration is by no means a magical solution to the COVID-19 pandemic. Prevention requires a multi-faceted approach and continued vigilance. An air purifier that meets the requirements we’ve recommended above will filter viruses and bacteria from the air while also reducing your contact with harmful chemicals—keeping your immune system strong.
Other recommended precautions, including wearing a mask in public, social distancing, maintaining a small social bubble, surface cleaning, and regular hand washing, should all continue. Maintaining these lifestyle changes will help keep yourself and those around you safe from COVID-19.
Contact Intelligent Air to Learn More
Intelligent Air is a Canadian company proudly based in Waterloo, Ontario. We specialize in AllerAir Air Purifiers that target viruses, bacteria, and other harmful air pollutants. If you’d like to learn more about what air purification system is right for your home or business, contact Intelligent Air.