Changsha Develoina Heat Energy Technology Co., Ltd established in the early year of 2004, that has passed ISO 9001. We are the professional supplier in Paper-making Ventilation System, hot-air drying technology and steam heat exchanger. We have more than 100 employees, including over 30 technicians and experts, and annual output reaches RMB 20 million. The factory area is about 10000*?with advanced production equipment, and automatic production line.