Natural ventilator can be divided into horizontal and vertical types according to installation location. According to the structure, they can be divided into streamlined natural vent and low-profile ventilator. According to functions, they can be divided into opening type, opening and closing type, daylighting type. Natural ventilator is ideal product for ventilation in high-heat workshops. They are suitable for occasions which the number of air changes is large and the concentration of hot air, exhaust gas, harmful gases and smoke is high. It is widely used in various industrial plants for ventilation, such as electric power, metallurgy, chemical industry, light industry, electronics, shipbuilding and so on. National Standard Atlas 11CJ33<<Daylighting Natural Ventilator>> is co-edited by Mcwell. and China Building Standard Design and Research Institute. It covers all types of daylighting natural ventilator and is selected by various design institutes.