Can I measure carbon dioxide (CO2) indoors to get information on ventilation?

Good ventilation is important to help protect people from COVID-19 and for healthy indoor environments in general. Carbon dioxide concentrations indoors can provide information about ventilation but need to be interpreted carefully.

• See CDC Ventilation FAQs for more information.
• See the ASHRAE Position Document on Indoor Carbon Dioxide (pdf).

Return to Frequent Questions about Indoor Air and Coronavirus Disease (COVID-19).