Our eternal pursuits are the attitude of "regard the market, regard the custom, regard the science" plus the theory of "quality the basic, have faith in the main and management the advanced" for 500mm Type Ventilation Fan, Exhaust Ventilation Fan, Desiccant Wheel, Fresh Air Ventilation,Positive Pressure Ventilation. Warmly welcome to cooperate and develop with us! we will continue to provide product with high quality and competitive price. The product will supply to all over the world, such as Europe, America, Australia,Nairobi, Niger,Milan, Portugal.The company has perfect management system and after-sales service system. We devote ourselves to building a pioneer in the filter industry. Our factory is willing to cooperate with different customers domestic and overseas to gain better and better future.