Features: Louver automatic control system, automatic pan fan open and closed to dust, waterproof, aesthetic effect. Low noise, air volume, less power consumption, the cooling effect obvious; Can briefing, but also ventilation, Quality assurance! And other greenhouse ventilation cooling the best choice. Scope of application: Almost all the needs cooling, ventilation, ventilation of the premises may be used, such as commercial plants, supermarkets, offices, hotels, hospitals, Station, a stadium, a dance hall, an auditorium, conference rooms, schools, cafes, factories, workshops and other places. 2, applies to high temperature or smell of industrial production workshops, such as chemical plants, mills, factories, machinery factory, can also be used for jobs or full cooling ventilation.