Rani ki vav is located in Patan, Patan district, Gujarat, India. Rani ki vav was constructed during the rule of the Chaulukya dynasty. The construction of Rani ki vav is attributed to his queen Udayamati. Another variation is a hybrid between VAV and CAV systems. This VAV system consists of a VAV box, ductwork, and four air terminals. Chand Baori, Rani ki vav, Step-well of Ambapur, and the Dada Harir Stepwell. Rani ki vav is declared the Monument of National Importance and protected by the ASI. Even a simple VAV system has several advantages over a CAV system. The main tourist attractions are the Rani ki vav (World Heritage Site) and patola saris. According to popular tradition, she also commissioned the Rani ki vav (Queen's stepwell). There are 12 Vav, or "men," representing the 12 tribes or patriarchs of Israel. In Gujarati and Marwari language, they are usually called "vav" or "vaav" (). The vav ("hook") connects the two realms. There is another stepwell known as Badiyashi Vav in Biladi Baug. VAVs supply pressurized air to VAV boxes, usually one box per room or area.