GDHans was founded in 1996, which introduced the advanced technology of louver hollow glass window products. After 20 years of development, GDHans become a company that includes production, sales and service. The products got the Certification from IS09001、AAMA、CCC. GDHans has rewarded a number of national technology patents and invention patents. GDHans devote to promote louver hollow glass window products, which have 100 thousands times mechanical durability test, 34db-Sound Insulation and 0.38SC-shading coefficient. Productions of GDHans have use for many different places, such as hospital, school, hotel, etc. Be trusted by clients all over the world, we sincerely invite you to cooperate with us.