What does your CO2 number mean?

As the Public Health Agency of Canada (PHAC) noted in November 2020, the vast majority of Covid19 transmission occurs indoors, and, importantly, in settings with poor air ventilation. Given we spend over 90% of our time indoors, the importance of airborne transmission cannot be underestimated.

To put this in more visual context, if an infected individual enters an enclosed space with poor ventilation, they breathe out their Covid19 particles which are then inhaled by others. It lingers and spreads to fill a room, just like smoke. And voila, there’s your outbreak. Wondering what you can do to help reduce the risks of airborne Covid transmission? Here are a few tips. 

Start with a CO2 reading. Our Air Safety Calculator will translate your score into an understanding of whether action is necessary. Try it out! 

Air Safety Calculator


What next? Here are a couple of good starting points.

 Air Filters (especially HEPA): Particle counters confirm that  a filter can produce an order of magnitude reduction in small  airborne particles. So the addition of these filter(s) within a space can help reduce airborne particles, which reduces airborne risks of infection. In addition, some filters come with built-in UV-C disinfection which can also kill viruses directly.

Windows and doorways: Even a single open window with a fan in it can have a dramatic impact on the amount of exhaled air lingering within a space. In many cases a single fan can decrease lingering exhaled air by more than 50%.