In this installation of the “Mechanical Mavericks: Design Discussions with Mechanical Engineering’s Thought Leaders” video series, Engineered Systems Editor-in-Chief Herb Woerpel interviews Cory Duggin, P.E., LEED AP BD+C, BEMP, principal, PEAK Institute, TLC Engineering Solutions. Their conversation centers on the importance of recently-released Addendum aa to ASHRAE standard 62.1, including the energy and cost savings implications of using the IAQ procedure rather than the VRP. According to Duggin, “This really sets the bar for what acceptable air quality is in spaces.”