Efficient ventilation is a key challenge for schools, requiring a balance between maintaining indoor air quality (IAQ) and optimizing energy efficiency. At South Lafourche High School and Thibodaux Middle School in Louisiana, fluctuating occupancy levels—particularly in classrooms and gymnasiums—highlighted the need for a more innovative approach to ventilation. Tasked with enhancing the HVAC systems at these schools, Castagnos Goodwin Utley (CGU) Engineers implemented a cutting-edge solution to ensure both energy savings and compliance with ASHRAE standards.