What they found
This study found that natural air change rate and building age were positively associated with indoor/outdoor particulate matter (PM) ratios during wildfire smoke events. Conversely, central HVAC systems were negatively associated with these ratios.
What they studied
Researchers measured air change rates in 17 schools using CO2 decay testing and investigated how school characteristics influenced indoor/outdoor PM ratios during a May 2023 wildfire smoke event.
Takeaways
The abstract focuses on findings; it does not give personal how-to steps.
About this paper
This study used controlled release CO2 decay testing in 17 schools to determine air change rates. Researchers then analyzed school characteristics and air change rates against indoor/outdoor PM ratios during a May 2023 wildfire smoke event.