Changsha Develoina Heat-Energy Technology Co., Ltd established in the early year of 2004. Changsha Develoina Heat-Energy Technology Co., Ltd has passed ISO9001. We are the professional supplyer in Paper-Making Ventilation System, and guider in hot-air drying technology. We have more than 80 employees, including over 30 technicians, and annual output reaches RMB 20 Million. The area is about 10000 m2 with advanced production equipment, and automatic stream-line production. Changsha Develoina Heat-Energy Technology Co., Ltd. is specialized in studying material drying heat energy and heat recycling technology and equipment. With high technology talents studying drying mechanism and the whole drying system of thermotechnical theory in drying ventilation field, we have devised drying processes integrating cyclic heat utilization and devised heating systems, ventilating systems and hot hair exhaust systems with the use of heat energy. We not only make the whole drying processes follow the drying curve, but also effectively and economically use cyclic and recycled heat energy.