Against the backdrop of the in-depth advancement of the national “Dual Carbon” strategy and the accelerated popularization of green buildings, a high-quality door and window means far more than shelter from wind and rain. It serves as a critical barrier for building energy conservation and the first line of defense for green human settlements.

Recently, the casement window series of Hangxin Qiannuo System Doors & Windows has passed rigorous assessment by authoritative national institutions and obtained the Three-Star Certification of China Green Building Materials Product — the highest tier in the graded certification system for green building materials. This authoritative national endorsement marks that Hangxin Qiannuo has officially become an industry benchmark in the green and low-carbon sector.

One Certificate with Dual Credentials

The Green Building Materials Product Certification is jointly promoted by the State Administration for Market Regulation, the Ministry of Housing and Urban-Rural Development, and the Ministry of Industry and Information Technology. In accordance with the Evaluation Standards for Green Building Materials, it conducts a full-life-cycle comprehensive assessment of products covering resource, energy, environmental and quality attributes. As the highest grade, the Three-Star Certification requires products to meet national standards in core indicators including thermal insulation, sound insulation, wind pressure resistance, water tightness and air tightness. It also imposes stringent requirements on every link from raw material procurement, manufacturing, transportation and application to recycling. It is widely regarded as the “green pass” in the building materials industry.

For the market, this certificate serves as a genuine access credential. Green building materials have become a substantive requirement for government procurement. Certified products will be included in the Green Building Materials Database for Adoption and Application managed by the Ministry of Housing and Urban-Rural Development, and enjoy priority selection in green buildings, prefabricated buildings and other engineering projects.

Green features are built into Hangxin Qiannuo System Doors & Windows from the outset.

For Hangxin, green development is not a last-minute effort merely to obtain a certificate, but a “factory default” embedded in its product DNA through 16 years of dedicated industry practice. The certification demands rigorous on-site factory audits, random product sampling inspections and post-certification surveillance to guarantee the consistent and stable green and energy-saving performance of products.

Relying on its 60,000 ㎡ intelligent door and window processing base in Jintang, Chengdu, Hangxin has introduced intelligent CNC processing and testing equipment for system doors and windows from Germany and Italy. Core processes such as cutting, milling and corner crimping are completed numerically. The ERP system connects all links including design and order placement, procurement and warehousing, production and processing, and pre-delivery inspection, enabling full-process digital management from drawings to finished products. Compared with conventional door and window factories, the base achieves markedly lower production energy consumption and steadily improved product precision and material utilization rate. Intelligent manufacturing underpins its foundation for green development.

Behind its positioning as a “Builder of Green, Energy‑Saving and Smart Cities” lies Hangxin’s experienced R&D team specializing in curtain wall and door & window design. The team devotes itself to the R&D and innovation of system doors and windows, continuously upgrading product structures and material technologies to ensure every product accurately meets energy‑saving requirements in different climatic zones. The Hangxin Qiannuo casement window series that has obtained the certification is a concentrated showcase of such R&D accumulation, with four coordinated systems working in synergy:

Profile System — Multi‑chamber thermal break profiles independently developed by Hangxin, which structurally reduce heat transfer paths. Sealing System — A triple‑seal structure paired with professional sealing, waterproof, sound‑insulating and heat‑insulating materials for comprehensive improvements in air tightness, water tightness and sound insulation. Glass System — High‑performance Low‑E insulated glass that reflects heat and cuts down radiant heat transfer at the source. Hardware System — Carefully selected high‑performance hardware to guarantee the durability and tightness of the entire window.

Under identical environmental conditions, the series can cut the combined energy consumption of indoor air conditioning and heating by 30%, delivering far better energy‑saving performance than conventional doors and windows.

From manufacturing high-performance windows to delivering complete buildings

This certification is not only proof of product quality, but also provides authoritative supporting evidence for engineering bidding, government procurement and green building projects. From a single window in a home to a building in the city, green concepts are being implemented in a more systematic manner.

Going forward, Hangxin Qiannuo System Doors & Windows will continue to uphold its mission of “making buildings more energy-efficient and homes more comfortable”. It will clad every building in an energy-saving shell, maintain a pleasant temperature for every household, and bring the green strength of Chinese doors and windows to a broader global stage.