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Increasing Ventilation in Schools Across Ontario Juan Malvestitti is the man in charge of getting the word out on safe back to school, and specifically Nerva's duct sealing process, which is a proven method to increase ventilation without the need for mechanical upgrades. Today we focus on safe back to school, what it means for parents, students and educators. Juan Malvestitti is the man in charge of getting the word out on safe back to school, and specifically Nerva's duct sealing process, which is a proven method to increase ventilation without the need for mechanical [...]