Years Experience
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Annual Capacity (㎡)
Registered Capital (RMB)
The global architectural landscape is witnessing a paradigm shift. Where traditional "boxy" structures once dominated, modern design is embracing organic geometry. As a leading China Circular Glass Windows Manufacturer, we have observed a 35% increase in demand for non-linear window systems over the last five years. Circular glass windows, once reserved for historic restorations or nautical portholes, are now a focal point in contemporary luxury residences, minimalist commercial hubs, and high-tech industrial offices.
The "softening" of urban skylines is a major trend. Architects are utilizing circular and arched windows to break the monotony of straight lines, creating a sense of biophilic harmony. In markets like Europe and North America, circular windows are frequently used as "statement pieces"—picture windows that frame the landscape like a living painting. Meanwhile, in emerging markets, they represent technological sophistication and status.
From an industrial perspective, the manufacturing of circular windows requires significantly higher precision than standard rectangular units. Bending aluminum profiles without compromising structural integrity and ensuring a perfect seal for curved glass are tasks that only a specialized factory can handle. At Nanjing Spencer, we leverage advanced CNC bending technology and precision glass cutting to meet these rigorous global standards.
Nanjing Spencer Window Co., Ltd. was established in 2013 with a registered capital of RMB 20 million. The company operates a modern production base covering approximately 10,000 square meters. As an integrated enterprise combining research and development, manufacturing, and sales, Spencer specializes in aluminum alloy system doors and windows, offering solutions for both standard and high-end architectural applications.
With an annual production capacity of up to 100,000 square meters, the company’s products are widely used in residential buildings, commercial complexes, and industrial projects. By combining modern design concepts with durable materials and precise engineering, Spencer delivers door and window systems that feature excellent sealing performance, energy efficiency, and long-lasting reliability.
Our facility is equipped with automated CNC lines for aluminum profile processing, ensuring millimeter-level precision for complex circular shapes.
Strict adherence to ISO standards and international building codes (like Australia's AS2047) ensures every window is hurricane-proof and thermal-efficient.
Real estate developers and large-scale architectural firms from Australia, Middle East, and the US choose China factories for the cost-to-quality ratio. We provide end-to-end OEM/ODM services.
In high-end villas, Circular Pivot Windows provide a unique ventilation solution while maintaining a sleek, modern exterior aesthetic.
Offices and hotels use round windows to create "capsule-like" interior pods or dramatic lobby facades that stand out from competitors.
The dominance of Chinese manufacturers in the circular glass window sector stems from a unique integration of supply chain agility and technological investment. Unlike many Western workshops that treat circular windows as expensive custom orders with 6-month lead times, factories like Nanjing Spencer have streamlined the process. We utilize specialized rolling machines for aluminum profiles that maintain structural integrity during the bending process, paired with automated glass tempering furnaces capable of handling curved panes.
Furthermore, China's logistical advantage allows us to export high-performance Triple Glazed Circular Windows that meet the strict thermal break requirements of the Australian AS2047 standard or European U-value regulations, all while maintaining a competitive price point that allows developers to stay within budget without sacrificing design.
Spencer provides a comprehensive range of door and window solutions designed to meet diverse architectural needs. Its offerings include various types of casement windows, sliding systems, and integrated screen window designs, as well as insulated aluminum alloy doors and customized sunroom solutions. Through flexible configurations and tailored designs, the company is able to adapt its products to different spatial layouts, functional requirements, and aesthetic preferences.
The company places strong emphasis on technological innovation and precision manufacturing. Equipped with advanced production lines and supported by an experienced technical team, Spencer maintains strict quality control throughout every stage of production. From raw material selection to processing and final assembly, each step is carefully managed to ensure high standards in durability, safety, thermal insulation, and soundproofing performance.
Nanjing Spencer Window Co., Ltd. follows the philosophy of “Quality First, Customer Foremost, Integrity-Based.” The company provides comprehensive services covering consultation, customized design, and after-sales support. By integrating innovation with craftsmanship, Spencer strives to create comfortable, energy-efficient, and aesthetically refined living spaces.
Spencer is committed to continuous innovation and service improvement, aiming to become a trusted global partner in the door and window industry while delivering lasting value to its customers through sustainable engineering and artistic design.
Spencer Window
