Interactive, online multimedia training and decision support tool for sustainable commercial buildings. EcoAdvisor is highly graphically oriented and highly interactive. Interactive multimedia is highly cost-effective compared with instructor-led learning for users can learn 40 percent faster than in classroom situations, and each user can learn at his/her own pace. Daylighting, natural ventilation, lighting, HVAC and integrated building design are the major study areas. Currently there is no charge for the viewing the example content material now available for viewing on the website. In the future, costs will be listed for accessing the content of major lessons.