Established in 2014, Grandex Door Solutions Co., Ltd. is a premier entry door and window system manufacturer. Our 35,000 m² facility integrates 16 years of industry expertise. With an annual export revenue of USD 28 million, we serve as a backbone for Chicago’s growing commercial and residential infrastructure, providing high-performance chain winder awning windows that meet stringent US building codes.
Chicago's unique climate and vertical landscape require window solutions that prioritize thermal efficiency and durability. As a leading manufacturer, we provide hardware that stands against the harsh Midwestern winds while offering elegant aesthetic appeal for modern developments in the Loop and beyond.
Our 85 specialized engineers ensure that every chain winder mechanism is stress-tested to exceed the wind load requirements typical of Chicago's environment.
Leveraging our 1,200 supply chain partners and intelligent sorting systems, we offer streamlined production cycles that meet tight commercial project timelines.
Grandex Door
