Real estate companies tend to purchase door and window products from the perspective of energy conservation

The promotion of building energy-saving process has also accelerated the application of energy-saving doors and windows, and the development companies are more inclined to purchase door and window products from the perspective of energy conservation. Recently, regarding the energy-saving door and window procurement concerns, Zhu Xiankun, the deputy general manager of Landsea Real Estate Purchasing Department, Hu Xin, Director of Wantong Real Estate Procurement Center, and Dong Zhiyong, Manager of Investment Management Department of China Merchants Property, were interviewed.

Q: The Ministry of Housing and Urban-Rural Development recently issued a notice to save energy-saving door and window products. Will the introduction of this system affect the procurement principles of enterprises?

Zhu Xiankun: This system has guiding significance for standardizing the production and product standards of the door and window processing and installation industry. It will surely eliminate a group of non-standard and small workshop doors and windows enterprises, raise the level of the entire industry, and save energy and reduce consumption for residential construction. Development has a strong push. However, this has little effect on the procurement work of Landsea Real Estate, because Landsea Real Estate has always had a high purchase standard for windows and doors, and all parameter requirements are difficult to reach for low-end and small-scale enterprises, and they cooperate with Landsea Real Estate. The doors and windows related companies (profiles, glass, hardware, processing and installation companies) are the industry leaders. For this system, we will make clear in the tender procurement the bidders to provide relevant certificates, test reports, certification documents and other information as a prerequisite for entry.

Q: What are the main energy-saving indicators for companies when purchasing doors and windows?

Zhu Xiankun: We will be very concerned about the overall match of the doors and windows, profiles, glass, hardware and other matching.

Specific technical aspects will require that the overall heat insulation value of doors and windows must be less than 2.0W/m2K; the basic requirements of Low-E glass are: high-transmittance offline low-emissivity coated glass, double tempered, hollow, argon-filled, integrated The "K" value should be less than 1.5W/m2K.

Dong Zhiyong: As one of the surface maintenance of buildings, doors and windows directly affect the energy-saving performance of buildings, and improving the insulation performance of doors and windows is the main way to ensure the energy consumption of buildings. The real energy-saving doors and windows are not a single partitioned aluminum profile or a low-E insulating glass energy-saving material. It is a perfect combination of the system and the integrated results of all aspects, and is indispensable. Therefore, the main concern in terms of doors and windows The indicators such as heat conduction and heat radiation should be matched with relevant indexes of energy-saving buildings.

Different heat transfer coefficients determine the different energy consumption of doors and windows, so we must choose the profiles, such as the application of thermal insulation cold bridge multi-cavity aluminum alloy profiles; glass is the main window of thermal radiation loss, so we have to choose the building windows and doors, To ensure the energy efficiency of the entire building, we must choose the glass reasonably. In the case of the southern region, the southern region is a hot summer and warm winter region with a long period of high temperature. As the choice of glass, it cannot be selected as a transparent glass with good light, and should be selected for low heat reflection, such as heat reflective coating. Hollow glass and Low-E hollow glass.


Hu Yi: Vantone Real Estate has long been concerned about the application of energy-saving doors and windows, and in accordance with the energy-saving requirements around the procurement. In recent years, with the advancement of Vantone Real Estate's green strategy, the requirements for energy saving of doors and windows have also been continuously improved. For example, the glass requirement is Low-E, the heat insulation strip is better, and the cavity design needs a reasonable cold bridge. Etc. to comply with relevant indicators of building energy efficiency.

Q: In addition to energy-saving indicators, what kind of performance will be paid attention to when purchasing door and window products?

Zhu Xiankun: We will first focus on the airtightness, watertightness, sound insulation performance, and strength of the entire window (plastic lining steel performance, etc.); followed by the glass reflection effect, condensation phenomenon, etc.; again the installation process, node processing The details of the measures, the quality of the auxiliary materials (foam, etc.), how to prevent leakage, etc.

Dong Zhiyong: From the selection of windows, the structural design of the form, the application of accessories to the processing and assembly, construction and installation are the focus of attention, in some aspects, such as the application of sealant strips, processing quality, etc. will affect the use of doors and windows products Life and safety. (The above content is taken from: China Real Estate News)

For the interviews of two real estate developers in the China Real Estate News, Jiu Zheng Xiao Bian also visited several companies in Sichuan in recent days to understand the implementation of energy conservation by door and window companies.

During the visit to Chengdu Tangmen Wood Industry Co., Ltd., the relevant person in charge of the company stated: “In recent years, Tangmen Wood has not only made breakthroughs in energy conservation, but also developed door and window products for affordable housing and versatility. The wood industry insists on producing according to the relevant standards of the country and the industry. Many products even exceed the requirements of the relevant standards."

When talking about energy saving of doors and windows, the person in charge of Chengdu Renyuan Doors & Windows Co., Ltd. stated: “With the relevant requirements of national policies on energy conservation and consumers’ concern for green environmental protection, doors and windows products must also keep up with the situation. Energy-saving doors and windows will be a With great development trend, we have already developed a lot of new energy-saving doors and windows products for Renyuan doors and windows, and we plan to invest in the market in the near future."