It is important to communicate to your clients that multiple complementary home energy improvements may be important to realize the full benefits of an energy efficient home. The HAAS approach considers the intended or unintended effects that retrofitting one component of a home can have on other components. By taking HAAS into consideration, contractors can advise homeowners on the importance of well-planned whole-home renovations and offer solutions that can fix existing issues, avoid creating new issues and maximize the co-benefits of the product you are selling.