It was the summer of 2020 and Avon Old Farms School needed a new ventilation system. Avon Old Farms School is an all-boys private boarding high school in Avon, Connecticut. It was founded in 1927. And as a historic campus of that era, it had no previous ventilation in place. The goal was to enhance indoor air quality and take on COVID-19 to prepare for reopening in the fall. Plus, as a historic campus, all of the school’s buildings had to remain intact. Any changes made had to be completely reversible, and hiding the equipment wasn’t an option. Finally, the school needed the ventilation system to be as energy-efficient and sustainable as possible.