High-Quality Doors & Windows | Shandong Changyi Engineering

CHANGYI designs and manufactures code-compliant steel fire door assemblies for the U.S. and Canadian markets. Our door assemblies are fire-tested to UL 10C / UL 10B and CAN/ULC-S104, carry the Warnock Hersey (WH) label recognized across North America, and are CE marked to EN 1634-1 / EN 13501-2 for European and international tenders. With ratings from 20 to 180 minutes, 1¾" (44.5 mm) door thickness, and full factory preparation for U.S./Canada-spec closers, hinges, and exit devices, CHANGYI delivers fire doors that install cleanly and pass inspection the first time.

CHANGYI delivers high-performance wooden fire doors that combine ultimate safety with architectural elegance. Engineered for the North American market, our doors provide a critical life-safety barrier without compromising on design.

Certified Protection: Fully tested and compliant with UL 10C/10B, NFPA 252 (USA), and CAN/ULC S104 (Canada).
Flexible Ratings: Available in 20, 45, 60, and 90-minute fire ratings.
Proven Track Record: Successfully deployed in major commercial and luxury residential projects across the United States and Canada.
Bespoke Design: Premium wood veneers and custom finishes tailored to your architectural vision.

CHANGYI Aluminum Casement Windows provide superior structural strength and modern design, ensuring maximum ventilation and security.

Modern Slim Design: High-strength aluminum allows for narrow sightlines, offering a clean, contemporary look with more glass area.
Maximum Airflow: Hinged at the side, the sash opens full 90 degrees to direct fresh air into your interior.
High Durability: Finished with architectural-grade powder coating for exceptional resistance to corrosion, fading, and scratching.

CHANGYI manufactures thermally broken aluminum sliding door systems engineered for the U.S. and Canadian markets. Our assemblies are NFRC-rated for U-factor, SHGC, and visible transmittance, tested to AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS), manufactured under ISO 9001 / ISO 14001 / ISO 45001 systems, and CE marked to EN 14351-1 for European and international tender packages. With 6063-T5/T6 thermal-break profiles, double or triple low-E glazing, and 2-, 3-, and 4-panel configurations, CHANGYI delivers large-format sliding doors that meet energy code, spec review, and field inspection 

CHANGYl Aluminum Folding Doors create a seamless transition between indoor and outdoor spaces, offering panoramic views and high-performance engineering.

Panoramic Opening: Multiple panels fold and stack neatly to maximize space and provide an unobstructed view.
Heavy-Duty Precision: Stainless steel rollers and bottom-tracking systems ensure smooth, effortless operation even for oversized panels.
Weather Shield: Advanced EPDM gaskets and thermal break profiles provide superior air and water tightness.

CHANGYI Vinyl Casement Windows offer the perfect blend of modern energy efficiency and maintenance-free durability, providing an airtight seal for maximum comfort.

Superior Insulation: Multi-chambered virgin Vinyl frames provide exceptional thermal performance, meeting Energy Star requirements for all climate zones.
Maintenance-Free: UV-resistant vinyl ensures the frame will never rot, peel, or require painting, maintaining a fresh look for decades.
Maximum Ventilation: Opens a full 90 degrees to capture cooling breezes and allow for easy glass cleaning from inside the home.
Weather-Tight Performance: Advanced compression seal technology and fusion-welded corners offer industry-leading resistance to air and water infiltration.

CHANGYI Vinyl Double Hung Windows combine timeless architectural appeal with the ultimate in energy efficiency and low-maintenance convenience.

Exceptional Insulation: Advanced multi-chambered Vinyl frames provide superior thermal resistance, significantly reducing heating and cooling costs.
Tilt-In Convenience: Both sashes are designed to tilt inward, allowing for safe and easy cleaning of the exterior glass from inside the home.
Certified Durability: Gold Label certified to AAMA/WDMA/CSA standards; fusion-welded corners ensure a lifetime of structural integrity and leak protection.
Constant Force Balance: Equipped with a precision-engineered balance system for effortless, fingertip operation and reliable positioning at any height.

CHANGYI Vinyl Sliding Windows offer a space-saving design with industry-leading energy efficiency, perfect for modern residential projects.

Space-Saving Efficiency: Horizontal sliding operation is ideal for areas where exterior space is limited, such as patios or walkways.
Energy Performance: Multi-chambered Vinyl frame and dual-pane Low-E glass maximize thermal insulation and reduce utility costs.
Quiet Comfort: Advanced interlocking systems and high-quality weatherstripping minimize noise and air leakage.