Changshu High-Tech Energy-Saving Dorwin Co., Ltd.

Changshu High-Tech Energy-Saving Dorwin Co., Ltd. (CSOTK) is a specialized manufacturer and exporter based in Suzhou, Jiangsu province, China. Established in 2009, the company is a recognized leader in the building energy-saving sector, operating a 5,400-square-meter production facility with an annual output capacity of up to 300,000 square meters. CSOTK focuses on the independent research, development, and production of advanced blind-between-glass and hollow shutter glass systems, holding completely independent intellectual property rights for its core technologies. The company even contributed to the editing of the national industry standard for sealed insulating glass units with internal shading. Their comprehensive product portfolio includes motorized and rechargeable hollow shutter glass, magnetic-controlled blinds, electric horizontal blinds, and wrought iron insulating glass. Beyond specialized glass units, they manufacture metal fittings for construction, plastic products, and solar thermal power generation components. As a versatile B2B partner, CSOTK offers OEM, ODM, and OBM services, catering to both domestic and international markets with a strong presence in North America, Western Europe, and Asia. Their commitment to quality and environmental sustainability is backed by a robust quality management system, holding certifications such as ISO 9001, ISO 14001, CCC, FCC, and IGCC. The company is a trusted supplier to major international clients, including Masonite and Nova Plastech, providing high-efficiency solutions designed to improve living environments and reduce building energy consumption.