DYZT roof natural lighting ventilator is composed of profiled steel plate. It has the characteristics of simple structure, light weight, convenient installation, no maintenance, day-lighting, ventilation and exhaust as a whole, beautiful appearance and so on. Without electric power, it can also achieve good ventilation result. It has been widely used in the ventilation of various hot workshops of the areas of electric power, metallurgy, machinery, petrochemical, light industry, electronics and other departments. We have developed DYZT series roof natural ventilation device on the basis of absorbing foreign advanced technology and summarizing the advantages of domestic similar products. It has a more reasonable structure and better performance, which is an ideal energy-saving ventilation device.