Small door and window, release energy saving big momentum. One of the special committee of wood door of China timber distribution association expert introduction, both in national standard fire safety as the key content of doors and Windows, although on the fire door, window product naming, classification and codes, specifications and types, technical requirements, test methods, inspection rule, mark, packing, transportation and storage, etc, but it applies to all building which has the function of light steel window, wood and wood composite window and other Windows, and so on. Compared with the old standard, the new standard is not only refined, but also more energy efficient.

    Doors and Windows are an important part of the building envelope, which is the opening part of the building and the weakest link between the indoor and outdoor energy. Relevant data show that the heat loss through doors and Windows energy consumption accounts for about 28% of building energy consumption, air infiltration through doors and Windows energy consumption accounts for about 27% of building energy consumption, the total account for more than 50% of building energy consumption. Visible, the key of building energy saving is door window energy-saving.

    One industry expert said that the essence of window and window energy saving is to reduce indoor air and outdoor air as much as possible through doors and Windows. We know that heat transfer has conduction, convection and radiation. In order to reduce heat transfer through heat conduction, the material with low thermal conductivity is required. In order to reduce convection heat transfer, the doors and Windows are required to have good sealing performance. To reduce the heat radiation transmission, the door window has better shading function. In the standard of building energy saving design, the properties of doors and Windows are realized by heat transfer coefficient, airtight performance and shading coefficient respectively.

    Fireproof doors and Windows industry in China after more than ten years of development, improving quality and performance have a large product range also increased, the original standard is not suitable for guiding the production of the product, quality supervision and inspection. Institute of the ministry of public security in tianjin fire revision process, refer to the standard of the international standard and foreign developed countries, combined with the fire door production, installation and usage in our country, has carried on the thorough investigation, analysis and research. The new standard from the international and foreign standards introduced in the part of the heat insulation fire doors and fire door the concept and requirements of the fire door classification by original only according to the heat insulation fire door classification, according to the heat insulation fire doors, part of the heat insulation fire doors and fire door classification; At the same time, the original a, b, class c fire resistance adjusting fire door is 1.5, 1.0 and 0.5 h h h, enriched the kinds of fire door products, increased the practical choice, has insulating parts stays for only need to fire doors or refractory integrity requirements, you can choose some heat insulation or heat insulation fire doors. The new standard also stipulates that if the door fan is filled with materials, it should adopt a non-toxic and harmless fire and insulation material to reduce the impact on personal health. These regulations not only make the fire door more reasonable, but also reduce the production cost and raw material consumption of fire doors, and meet the requirements of environmental protection and the construction of economical society.

    At present, the building energy conservation work has received the party and the country's high attention. The national civil building engineering design technical measures - energy-saving ", "11th five-year plan" application and limited release to ban the use of technology, the implementation of the "building energy conservation project quality acceptance procedure"... A series of national policies and regulations on building energy conservation have been issued, which show the necessity of building energy conservation and the importance of the state to building energy conservation work.

    According to the research and practice of energy industry in the last 30 years, it is widely believed that building energy conservation is the most effective and most effective way of energy saving. At present, China's urban and rural construction housing is growing at more than 20% a year, year completed area of 2 billion square meters, including building area of 40 billion square meters, more than 95% of energy construction, the doors and Windows of energy consumption for 2 ~ 3 times of the developed countries. In the next 30 years, China will build 40 billion square meters of new buildings, so the doors and Windows industry will usher in an unprecedented opportunity for development.

    In fact, the United States and other developed countries also attach great importance to the technical standards for the production of energy-saving doors and Windows. The U.S. government rules to improve the effect of building energy saving, not only the ordinary residential building energy-saving materials and products need to adopt, and public buildings must also adopted energy-saving building materials and products. Commissioned by the U.S. department of energy (doe) national window rating committee formulates a set of plans, and specify the professional organization specially formulated the doors and Windows production related technical standards, especially in thermal performance and sealing life of hollow glass two aspects put forward specific requirements, and conduct supervision and inspection. New energy saving plans not only to the design of buildings, timber, construction has been clear about the energy efficiency standards, and requires each family should attaches great importance to the building energy efficiency, through the use of energy-saving products, the methods of energy saving technology to save energy, and save the cost of a year, or less than 100 yuan. Mentioned in the plan, although 100 yuan ($10) isn't much, but about nearly 100 million households in the United States, if you achieve this goal, you can save 10 billion yuan a year, saving effect is considerable.

    Of course, different areas, different buildings, have different energy efficiency design requirements. Alone in our country, for the thermal energy efficiency design in hot summer and cold winter region, the hot summer and cold winter area residential building energy efficiency design standards in different orientation, not old outside the window wall area ratio, specifies its heat transfer coefficient. In addition, the heat transfer coefficient and the comprehensive shading coefficient of the residential buildings in the south and north areas are stipulated in the design standard for energy conservation of residential buildings in hot summer and winter.

    In addition, the "public building energy efficiency design standard" the heat transfer coefficient and shading coefficient of external window also rules: about building outside the window airtight performance, the hot summer and warm winter area residential building energy efficiency design standard "has the following provisions:" 1 ~ 9 layers of residential buildings outside the air tightness of the window, under 10 mpa pressure difference, every meters per hour the air gap osmotic quantity should not be greater than 2.5 cubic meters, per hour per square meters area of the air and osmotic quantity should not be greater than 7.5 cubic meters; 10 and 10 layers above the tightness of the window, outside under the 10 mpa pressure difference, every meters per hour the air gap osmotic quantity should not be greater than 1.5 cubic meters, per hour per square meters area of the air and osmotic quantity should not be greater than 4.5 cubic meters."

    According to experts, the thermal conductivity of plastic doors and Windows is only 1/360 of steel and 1/250 of aluminum, which has good thermal insulation performance.