CAVI | Community Access to Ventilation Information

Everything you need to propose and implement a CO2 monitor lending program for your community's library

Meet library patrons' needs and increase environmental health literacy with CO2 monitors

We know that indoor air quality is improved with good ventilation, but we can not tell if a space is well ventilated just by looking at it. With CO2 monitors, you can better understand how much of the air you are breathing in was exhaled by other people.

Most people do not own CO2 monitors and do not know how to interpret CO2 readings. Libraries can solve both problems by offering patrons CO2 monitors and curated information packets.

This website collates information you can use to help your library set up a CO2 monitor lending program that empowers community members to understand and help to mitigate the potential risks of: airborne transmission of pathogens such as SARS-CoV-2 (the virus that causes COVID-19), high levels of CO2, and other pollutants that may be found in indoor air.

CO2 monitor info for libraries

Practical info about buying and recalibrating CO2 monitors and finding partner organizations and funders, plus template language for grant applications

CO2 monitor info for library users

Consumer-level information about using CO2 monitors, interpreting CO2 monitor readings, improving ventilation, and reducing the risk of airborne pathogen transmission.


Frequently asked questions about CO2 monitors in libraries. Ask your questions too!

Maps, news coverage, and research about CO2 monitors in libraries

Maps, news, literature, and case studies


Contact to get more information