It is widely known that buildings have the potential to cause great swings in the performance of occupants. Owners and occupants of buildings have the common financial goal of economic returns, yet efficiencies have traditionally been measured in energy use. Decision makers have been reluctant to use human productivity as a tool because it has been hard to measure. With over 25 studies completed, capped by a landmark Harvard Study, the jury is in. There is a spectacular relationship between indoor air quality and human cognitive function, unleashing an entirely new set of economic considerations when operating commercial property.