More than twice as contagious as previous variants, Delta has refocused building owners and occupants on the importance of healthy indoor air quality, especially ventilation rates. In fact, the highly flexible DCV approach can provide the right amount of healthy air where and when needed. It’s now understood that fixed ventilation rates exaggerate this conflict, and that DCV resolves the healthy vs. sustainable trap with accurate sensing and control of science-based healthy air parameters. In addition, the emerging consensus is to use higher ventilation rates in all buildings. The path forward to healthy, sustainable buildingsThe path forward must apply the lessons learned from 20 years of experience in labs to all commercial and institutional buildings.