Did you know you can make your own low-cost air purifiers? Here are instructions for two low-cost options you can make with a box fan and filters. Learn more about the importance of air filtration and ventilation + how to improve it through our link in bio. ▫️ ▫️ ▫️ ▫️ ▫️ ▫️ #AirPurifier #AirPurifiers #Ventilation #AirQuality #COVID19 #SafeBuildings #SchoolsReopening #wildfires