In the indoor environment, indoor air quality (IAQ) affects occupants and their ability to perform; and creates positive or negative impressions of customers, clients, and other visitors to a building. When the IAQ is good, buildings are great places to work, to learn, and to heal.2 When it is not, satisfaction with the indoor environment and productivity decrease; and health concerns increase. Poor IAQ hinders comfort, attention span and productivity. The Occupational Safety and Health Administration (OSHA) estimates that poor IAQ costs employers $15 billion annually due to worker inefficiency and days off for illness.