The green movement is gaining new ground in the built environment. Builders and HVAC contractors alike are benefitting from these inroads, and the National Association of Home Builders (NAHB) is keeping an eye on builder and consumer behavior as the idea of being green continues to advance. According to the "2020 Green Single Family and Multifamily Homes SmartMarket Brief" — which analyzes the green home building market and current market trends — 97 percent of green builders report using energy efficiency practices on more than 75 percent of their projects. The relevance to the HVAC industry is in the next finding that showed 88 percent of those 97 percent of green builders call out a tight building envelope and 61 percent use high performance ventilation. The latest in a series of studies conducted by Dodge Data & Analytics in partnership with NAHB, the report also points out that over two-thirds of these same green builders are also using practices designed to improve IAQ and water efficiency.