The architecture door and window industry is ushering in an overall reshuffle period

From January 1, 2021, the Beijing Municipal Bureau of Market Supervision and Administration, in conjunction with the Beijing Municipal Planning and Natural Resources Committee, the Beijing local standard \”Residential and Building Energy Design Standard\” will be officially implemented. According to the new standards, the capacity requirements for building exterior walls and building roofs will be greatly improved, and the thermal coefficient of the entire window of the building doors and windows will be increased to 1.1W/(㎡·K).

According to the new standards, in order to improve the quality of residential and architectural energy, the residential and architectural energy rate has increased from the current 60% to more than 80% (that is, based on the current standard, the energy rate is more than 20%).達不到新標準的產品，將無法進京。

What is the real meaning of the new standards for reducing the actual period and promoting the high-quality development of the industry? Does it mean that more than 20,000 existing companies in the architectural door and window industry will face a overall reshuffle? With such problems, China Business Times reporters visited some corporate and industry specialties.

Indoor energy consumption will be greatly reduced

\”The thickness of building walls is limited. If the wall thickness is increased to reduce the thermal coefficient, it will not be economically calculated. Adjusting the thermal coefficient of the period by adjusting the thermal coefficient k value of the period window is a simple and economical method.\” said Wang Zhiyi, the responsible person of Beijing Jiayu Construction Technology Co., Ltd.

The K value of the thermal coefficient refers to the heat transmitted through the single plane when the air temperature difference between the two sides of the protection structure is 1K (℃). In layman\’s terms, it is the amount of heat transmitted from one side with a high temperature to the lower side within the unit time and within the unit plane. In the north, due to winter heating, the indoor temperature is higher than that of the outdoors. The lower the heat coefficient, the better the indoor temperature maintenance effect and the better the outdoor drainage reduction effect. In summer, outdoor temperatures are often higher than indoors. The lower the heat coefficient, the less energy consumption of indoor cooling and better energy balance.

Since the implementation of the new standards, the consumption of natural gas, coal and electricity during the winter heating period in the north will be greatly reduced. The energy consumption of air-use electricity in the south in summer will also be greatly reduced.

The reporter learned that at present, the laundry technology commonly used in the building blocking bridge aluminum alloy door and window industry is still the laundry technology, which is to penetrate the Nylon heat insulation strip into the groove of the aluminum alloy profile to form a heat insulation strip, so as to減緩熱能量的傳遞。 Using strap technology, the heat coefficient is 1.8 to 2.4W/(㎡·K). To achieve the new standard, more scientific research efforts will be put into place and further improve existing technology. A more effective way is to use new materials and new technologies.

Wang Zhiyan said that after the new standards are implemented, polyurethane will be used as the heat insulation material. This is a patented technology. The advantage is that it not only solves the sealing and watertightness of the door windows, but also improves the temperature and energy saving effect of the door windows. However, compared with the traditional Nilong heat insulation strip, the cost of polyurethane materials is more expensive, but it will further promote enterprises that pursue high-quality products as the goal and constantly develop new technologies and new materials.

Beijing is the first to implement the highest standard的整窗傳熱系數，那麼南方地區又是怎樣的情形？ Li Jiangyan, the responsible person of Shanghai Injie Decoration Design Engineering Co., Ltd., said that Beijing has implemented the highest standards in the country. The \”Jiangsu Province Ultra-Low Energy Consumption Residential Construction Technology Guidelines\” issued by the Jiangsu Province Housing and Construction Building on December 18, and the provisions of the \”Jiangsu Province Ultra-Low Energy Consumption Residential Construction Technology Guidelines\” issued by the Jiangsu Province Housing and Construction Building on December 18. The limits of window heat and shading coefficients are not higher than 1.6W/(㎡·K), and the energy standards of southern provinces and cities such as Shanghai are not higher than 1.8W/(㎡·K). ). He believes that the implementation of the new standard has an energy efficiency of 80% for the buildings and doors and windows in Beijing. We look forward to the hot summer and cold winter areas to see Beijing and improve the energy standards of the festival.

To understand, the EU standard is 0.8. To narrow the gap, we need to further improve the materials, processing and installation techniques of the doors and windows.

The reporter visited and learned that the modern construction door and window industry in Europe has a history of more than 100 years. It has reached the forefront of the world in terms of product technical requirements, especially German enterprises, and industrialization not only in doors and windows, including buildings and other industries. High degree and solid basic science, the material used is also very different from that in China, including other materials. More than ten years ago, the door and windows had controlled the heat coefficient of the entire window to 1.1W/(㎡· K) and all installation methods are in the construction method.

The current construction methods in China are still on the old-fashioned foundation, mainly wet process technology, filling with foam + cement sand. This method is not good for moisture-keeping and waterproofing, and is easy to cause wall development. Therefore, it is necessary to improve the door and window industry standards.

New standards promote the development of industry standards

After the implementation of the new standards, the cost of door and window expenditure will increase significantly. The reporter learned from the interview that the retail cost of doors and windows installed in ordinary residential buildings using Nilong widgets is around 1,500-2,000 yuan. The price of using polymer materials will increase by 2-3 times to about 3,000-8,000 yuan. Despite this, after the implementation of the new standard, its market potential is huge, and its proportion is expected to reach 40%. Because this means that the reduction in indoor energy consumption will lead to a reduction in living costs.

Zhang Fujun, deputy general architect of Zhongxu Architectural Design Institute Co., Ltd., said that the \”Residential and Architectural Energy Design Standards\” DB11/891-2020, which will be implemented in Beijing from January 1, 2021, and \” Residential Design Standards\” DB11/1740-2020, \”Green Building Engineering Experience Acquisition Standards\” DB11/T1315-2020, three specifications and standards must be implemented in the actual engineering projects.

He believes that the above three standards and standards implementation purposes are very clear, which is to improve the comfort of residential residence, develop from various aspects such as residential safety, residential quality, and residential technology to improve the entire life cycle of residential residence. quality.

\”Residential and Architectural Energy Design Standard\” aims to achieve advanced level of residential and architectural energy design in the same climate region in the world. The country is the first to increase the residential and architectural energy rate from 60% to 80.More than % will further improve the capacity design level of residential and architectural buildings in our city.

But he believed that there was a big question about the implementation of the three regulations, such as the implementation standard of the exterior door and window, which greatly increased the cost of the project. Who will bear the cost of this increased cost. ?

But more people working in the construction door and window industry told reporters that more and more door and window companies are becoming high-end and branded, and consumers\’ demand for door and windows is gradually integrating to high-end. In the future, doors and windows should develop in the direction of high technology, and the customized doors and windows industry has unlimited potential. Compared with the reduction in long-term energy consumption caused by the implementation of higher standard whole-window thermal coefficient, the cost of doors is still calculated.

Open data shows that the market size of our door and windows industry has shown a jump in growth since 2012. The market size reached 458.9 billion yuan in 2013, an increase of nearly 80 billion yuan from 2012; 2014-2016 The growth rate of the annual door and window industry market has declined compared with before, and the market size has also remained between 550 billion and 600 billion yuan, but the market still maintained growth. In 2017, the market size of the door and windows industry reached 660.5 billion yuan, mainly benefiting from the positive development of the lower real estate and construction industry markets. Judging from the development of the market in my country in 2019, the development of our door and window industry has further leapfrogged, with an annual scale of 730 billion yuan, and it is expected that the annual scale of our door and window industry will reach 10,000 yuan from 2020 to 2021.

However, it cannot be ignored that the phenomenon of small and scattered markets and homogeneous competition is still very serious. The improvement of industry standards will help the industry to reshuffle the overall industry and promote the industry to conduct standardized competition.

Author: ■This reporter Sun Yongyan

Source: China Business News