Aluminum Alloy Inward Casement Window

The inward casement aluminum alloy window swings the sash fully into the interior space, bringing the complete glazed surface within comfortable reach and enabling thorough, safe glass cleaning from inside the room without any exterior access — a significant practical advantage for multi-story and high-floor installations.

Heavy-duty stainless-steel hinges and a multi-point locking system provide secure, stable sash operation, and the frame-to-sash sealing uses multiple rows of EPDM gaskets that compress consistently across the full perimeter when the window is closed, delivering reliable acoustic and thermal performance. The inward-casement geometry allows the window to be opened to a full 90-degree angle for maximum ventilation throughput when required.

The inward casement design is particularly valued in spaces where exterior window cleaning is impractical, or where furniture and fittings must be arranged close to the window reveal without concern for sash clearance on the outside. Typical applications include residential bedrooms, living rooms, and balconies, as well as offices, library reading rooms, and hospital wards where ease of operation and air quality management are both important.

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About Dongcheng

Located in the High-tech Industrial Park of Wuxing District, Huzhou, Zhejiang, China, Zhejiang Dongcheng Energy Saving Technology Co., Ltd. is a professional manufacturer specializing in aluminum energy-efficient doors and windows, fire-rated doors and windows, curtain wall systems, railings, shading systems, and skylights. Integrating R&D, design, production, installation, and after-sales service, we provide complete solutions for a wide range of building applications.

With advanced production equipment, a well-established management system, and an experienced professional team, we are committed to delivering reliable products and consistent quality. Operating in accordance with the ISO9000 quality management system, we implement standardized control throughout the production process to ensure that our products meet relevant standards and project requirements.

Driven by technology and innovation, we continuously improve our products and services to better serve the market. We also place great importance on safety management, maintaining strict supervision throughout project execution to ensure safe, stable, and reliable delivery.

Guided by the principles of integrity, quality, and service, we are committed to providing cost-effective products and dependable support, and we look forward to building long-term partnerships with customers worldwide.