This DIY ventilation system is a game-changer for classrooms! Built with materials from a local hardware store, it removes 90% of aerosols, including potential coronavirus particles, at a fraction of the cost of professional systems. Given its simplicity and effectiveness, this could be a blueprint for schools everywhere to improve air quality and safety. Plus, it tackles CO2 buildup, helping students stay focused. Anyone else think this might be a viable long-term solution beyond the pandemic?