Green and low-carbon transformation: system doors and windows become the "new darling" of energy-saving buildings

Under the macro background of the continuous deepening of the "double carbon" strategy, the green and low-carbon transformation has become an inevitable trend for the development of China's building materials and home furnishing industry. According to relevant building energy consumption statistics, the energy consumption of buildings in the construction and operation stages accounts for more than 30% of the total energy consumption of society. In the overall energy consumption of building operation, the energy lost through doors and windows accounts for 50% to 60% of it. This eye-catching figure makes the industry realize that doors and windows are the weakest in building energy conservation, but also the key link with the most potential to tap. Therefore, with the implementation of the new version of the "General Code for Building Energy Conservation and Renewable Energy Utilization" in various places, high-performance system doors and windows are rapidly moving from high-end consumption customization to the mainstream building materials market, becoming an inevitable choice for modern energy-saving buildings.

The reason why system doors and windows can become the "new darling" of energy-saving buildings is due to its profound transformation from traditional "processing and assembly" to "technology integration". Traditional doors and windows are often simply pieced together by roadside workshops with aluminum profiles, glass and hardware, and their air tightness, water tightness and heat insulation performance are extremely poor. The system doors and windows are an organic whole that has been carefully scientifically designed. It needs to comprehensively consider a series of important functions such as water tightness, air tightness, wind pressure resistance, mechanical strength, heat insulation, sound insulation, burglar prevention, sun shading, and weather resistance in the research and development stage. In terms of production and craftsmanship, the system doors and windows scientifically optimize the section of the profile, generally using a multi-cavity broken bridge aluminum structure, and with ultra-wide PA66 nylon thermal insulation strips, completely blocking the heat and cold conduction of the metal profile. In the choice of glass, multi-layer insulating glass, three-glass two-chamber glass, Low-E low-emissivity glass, and even more advanced vacuum glass have become standard for system doors and windows. These high-performance glass can not only greatly block the solar radiation in summer, but also firmly lock the indoor heating in winter. In terms of sealing system, the system doors and windows eliminated the traditional inferior PVC rubber strips, and instead used EPDM continuous bending rubber strips, and even added multiple sealing designs in key parts to ensure that the window frame and window sash achieve a near-perfect engagement. This multi-dimensional technology upgrade has greatly reduced the heat transfer coefficient (K value) of the system doors and windows, which can fully match the strict standards of ultra-low energy buildings and even "passive houses". From the perspective of market size, although the penetration rate of China's system doors and windows in the overall stock of buildings still has a large room for improvement compared with developed countries in Europe, America and other countries, it has shown explosive growth in recent years. With the iteration of consumption concepts, more and more homeowners are willing to pay for "long-term high efficiency, energy saving and comfort" when facing the renovation of new houses or second-hand houses. Although the initial investment cost of high-performance system doors and windows is slightly higher than that of ordinary doors and windows, the electricity saved by reducing the energy consumption of air conditioning and heating in subsequent use can bring long-term economic benefits. In the future, driven by the continuous up the ante of green building policies and the continuous improvement of the matching rate of hardcover rooms, the system door and window industry will accelerate the survival of the fittest. Those enterprises that lack core R & D capabilities and rely on price wars to assemble inferior materials will be marginalized, and the entire industry will enter a new era of high quality and low carbonization.