Green walls are self-sustaining garden systems that can be designed on the walls of a building. The purpose of this paper is to review all types of green wall systems so as to classify, organize their main features and investigate the benefits of green wall systems to improve buildings performance. It can be determined that green wall provide great potential in reducing energy intake in buildings, especially in the cooling periods. The study has been conducted on the basis of literature survey with Library, Journals, Internet, Various seminar papers, reports of research organization. In this paper a classification of green wall systems and the main requirements of different green wall systems are investigate. It concludes that some characteristics must be studied in depth, such as classification and benefits of green wall.
