The Science
The Science
The Science
Why we measure CO2 ?
“Wherever you are sharing air, the lower the CO2 levels, the lower the risk of infection.” – Professor Jiminez (University of Colorado Boulder)
Professor Jose Jiminez
– University of Colorado Boulder, USA
Why we measure CO2 ?
“Wherever you are sharing air, the lower the CO2 levels, the lower the risk of infection.” – Professor Jiminez (University of Colorado Boulder)
Professor Jose Jiminez
– University of Colorado Boulder, USA
Omnipresent
The average human exhales 21 000 times per day. Human CO2 production is a function of our very existence.
Exhalation
An average adult exhalation contains 35,000 to 50,000 parts per million (ppm) of CO2 – 100x higher than is typically found in outside air
Ventilation Indicator
The CO2 concentration in an occupied indoor space indicates whether there is sufficient ventilation. High CO2 levels = poor ventilation
Omnipresent
The average human exhales 21 000 times per day. The production of CO2 is a function of our very existence.
Exhalation
An average adult exhalation contains 35,000 to 50,000 parts per million (ppm) of CO2 – 100x higher than is typically found in outdoor air
Indicator
The CO2 concentration in an occupied indoor space indicates whether there is sufficient ventilation. High CO2 levels = poor ventilation
Co2 as a Proxy
CO2 is co-exhaled with other aerosols. This means the relative infection risk in a given environment scales with excess CO2 levels.
Productivity
A UK study studied the impact of elevated CO2 on productivity. They found where CO2 levels were lower, test scores improved by up to 12%.
Lifestyle
Maintaining Co2 levels below 700ppm is recognised as optimal for both occupancy comfort and productivity.
The Organisations
The Organisations
Global organisations communicating the importance of ventilation guidelines.
Global organisations communicating the importance of ventilation guidelines.
The experts
The experts
Industry leading experts on
airborne transmission , ventilation and
indoor air risk mitigation strategies.
"Covid-19 has redefined airborne transmission" - Published via the BMJ (April 2021)
There's a need for added emphasis on ventilation because the tiniest suspended particles can remain airborne for hours, and these constitute an important route of transmission.
Airborne Transmission: How to protect ourselves
Paper: Exhaled CO2 as COVID-19 infection risk proxy for different indoor
environments and activities
Indoor CO2 measurements by low-cost sensors hold promise for mass monitoring of indoor aerosol transmission risk for COVID-19 and other respiratory diseases.
The Science of COVID-19 Aerosol Transmission
CO-Author of Healthy Buildings
Our study a few years ago found exposure to CO2 at levels we typically find indoors was associated with decrements in decision-making performance.
CO2 impacts cognitive function performance at low levels (~900-1,400 ppm)
CNN Interview
Ventilation and CO2 meters
An overall improvement of CO2 levels was indeed registered for all classrooms where teachers were compliant and helpful in the management of the air ventilation strategy.
Therefore, this study reports the first evidence-based measures demonstrating that, with the exception of few environments affected by structural limits, the real-time visualization and monitoring of CO2 concentrations allows effective air exchanges to be implemented and contributes to prevent SARS-CoV-2 transmission.
"Covid-19 has redefined airborne transmission"
- Published via the BMJ
April 2021
There's a need for added emphasis on ventilation because the tiniest suspended particles can remain airborne for hours, and these constitute an important route of transmission.
Airborne Transmission: How to protect ourselves
Paper: Exhaled CO2 as COVID-19 infection risk proxy for different indoor
environments and activities
Indoor CO2 measurements by low-cost sensors hold promise for mass monitoring of indoor aerosol transmission risk for COVID-19 and other respiratory diseases.
The Science of COVID-19 Aerosol Transmission
CO-Author of Healthy Buildings
Our study a few years ago found exposure to CO2 at levels we typically find indoors was associated with decrements in decision-making performance.
CO2 impacts cognitive function performance at low levels (~900-1,400 ppm)
CNN Interview
Ventilation and CO2 meters
An overall improvement of CO2 levels was indeed registered for all classrooms where teachers were compliant and helpful in the management of the air ventilation strategy.
Therefore, this study reports the first evidence-based measures demonstrating that, with the exception of few environments affected by structural limits, the real-time visualization and monitoring of CO2 concentrations allows effective air exchanges to be implemented and contributes to prevent SARS-CoV-2 transmission.
know what you breathe
Knowledge is power
