Innovative Vertical Sliding Systems Tailored for Brussels, Antwerp, and Ghent Markets
Expertise, Innovation, and Localized Engineering
As a leading Double-Hung Windows Manufacturer for the Belgium market, we understand the unique intersection of medieval architectural preservation and cutting-edge Passive House requirements. In Belgium, from the historic townhouses of Bruges to the modern glass facades in the European Quarter of Brussels, the demand for high-performance windows has never been higher. While traditionally European "Tilt and Turn" windows have dominated, the "Double-Hung" or vertical sliding window is experiencing a significant renaissance among Belgian architects and property developers.
In densely populated Belgian cities, space is a premium. Double-hung windows slide vertically, requiring zero interior or exterior swing space, making them ideal for narrow Brussels streets.
Our windows are engineered to meet strict Belgian Energy Performance of Buildings (EPB) standards, featuring thermal breaks and Low-E glass for maximum insulation.
With high-decibel traffic in Antwerp and Liege, our double-glazed systems provide up to 45dB sound reduction, ensuring a quiet interior environment.
Belgium serves as a logistical hub for Europe, and the window manufacturing industry is currently shifting toward sustainable and circular economy models. The Belgian market is particularly sensitive to the U-value (thermal transmittance) of windows. Manufacturers are now utilizing advanced polymers and recycled aluminum to align with the "Renovation Wave" strategy promoted by the Flemish and Walloon governments. As a factory supplying Belgium, our production lines are optimized for customized sizing, allowing for seamless integration into 19th-century facade restorations where standard sizes are inapplicable.
The current trend in the Belgian window factory sector is the integration of "Smart Glass" and "AI-controlled ventilation." Double-hung windows are particularly suited for natural convection; by opening both top and bottom sashes, cool air enters the bottom while warm air escapes the top—a perfect solution for the increasingly warm Belgian summers without relying solely on air conditioning.
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.
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.
Our Double-Hung Windows are specifically tested for water tightness and wind resistance, making them exceptionally reliable for the coastal regions of Flanders and the windy Ardennes highlands.
Tailored Solutions for Residential and Commercial Excellence
Restoring old brick-layered houses with energy-efficient Vinyl Double Hung Windows that maintain the classic vertical aesthetic while providing modern R-values.
Utilizing Thermal Break Aluminum systems for high-rise offices to reduce solar heat gain and lower operational costs in the "Green City" initiative.
Installing corrosion-resistant aluminum frames with heavy-duty weather stripping to withstand the North Sea's salt spray and high winds.
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, ensuring seamless integration into both exterior facades and interior spaces.
Nanjing Spencer Window Co., Ltd. follows the philosophy of “Quality First, Customer Foremost, Integrity-Based.” We offer Belgian partners:
Global Quality, Local Precision
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 in Belgium and across the European Union.
Spencer Window
