Use *OHCOW's Ventilation Calculator to find out. This Excel-based tool can assist you in determining the adequacy of the ventilation in your classroom.
Watch the video, download the tool and follow the step-by-step instructions at https://www.ohcow.on.ca/covid-19/ventilation-calculation-tool/.
Once the ventilation rate in your classroom is determined you can even print a sign for posting on your door!
See also the Clear the Air and other related infographics at https://www.ohcow.on.ca/covid-19/#practical-solutions
*Occupational Health Clinics for Ontario Workers (OHCOW)