The commercial buildings industry is gearing up for a post-vaccine return to occupancy. Although it may seem like a return to business as usual, at least one pandemic-era change will stick around: The idea that indoor air quality (IAQ) matters. Optimizing buildings for better IAQ will require HVAC systems to work harder and use more energy. To prevent this from leading to higher energy bills, you’ll have to make sure you’re optimizing for energy efficiency.