Why CO2 monitoring matters

Carbon dioxide (CO2) monitoring is a simple but powerful way to assess indoor air health. High CO2 levels can signal poor ventilation, which contributes to the accumulation of airborne viruses and pollutants. By paying attention to CO2, we can take proactive steps to create healthier, safer spaces for everyone.

The link between CO2 and ventilation

Every breath we exhale adds CO2 to the air. In spaces where ventilation is inadequate, CO2 builds up, indicating that fresh outdoor air isn’t flowing in effectively. Poor ventilation doesn’t just lead to stale air - it allows other contaminants to linger, increasing the risk of airborne virus transmission.

Research confirms that spaces with good ventilation and lower CO2 concentrations are less likely to have viral particles accumulating in the air.

Beyond viruses, improving ventilation reduces the presence of other indoor pollutants, creating healthier environments overall.

Monitoring CO2 provides a practical way to identify when ventilation needs improvement and acts as a signal to take action.

High CO2 levels can also impact health

While CO2 itself isn’t harmful in typical indoor concentrations, prolonged exposure to high levels can affect health. Symptoms like headaches, fatigue, shortness of breath, and difficulty concentrating are common. These occur because high CO2 levels reduce oxygen in the air, which affects how well the body and brain function. 

For those with respiratory conditions, elevated CO2 levels can exacerbate symptoms. This makes CO2 monitoring especially important in spaces like schools, hospitals, and workplaces.

CO2: A practical indicator of safer air

Improving indoor air quality starts with understanding its dynamics, and CO2 monitoring is a valuable tool. The Safer Air Project is committed to raising awareness and providing tools to help create safer, healthier and more inclusive spaces for everyone. By addressing CO2 levels, we’re not just tackling comfort issues - we’re taking meaningful steps towards reducing airborne risks and supporting overall health. 

breathesafeair.com has a great overview of several CO2 monitors that are available to purchase.