Can energy efficient upgrades in your building affect air quality? Yes it can, and those effects can be either detrimental or beneficial depending on the level of knowledge of those performing the improvements. Understanding the "house as a whole" concept is critical to successfully performing energy upgrades to any building. Understanding how each integral component of the building interacts with other components can be the difference between success and failure. This is why it is important to consider hiring the services of an independent building science professional to work with you in the planning of such projects.