Both Indoor airPLUS and ENERGY STAR Certified Homes are voluntary programs created by EPA to promote improved construction in new homes. Indoor airPLUS is a companion label to ENERGY STAR Certified Homes. Together these programs provide increased energy efficiency, improved durability, and comprehensive health protections. Builders can use a variety of construction practices and technologies to achieve the Indoor airPLUS label, reduce indoor air pollutants, and improve the indoor air quality in your new home.
See http://www.energystar.gov/index.cfm?c=new_homes.hm_index to learn more about the ENERGY STAR Certified Homes Program.