We all know that thermal insulation doors and windows can relieve indoor temperature changes, but what is the function and significance of air tightness of doors and windows for cooling? Next, we will explain carefully what are the benefits of air tightness and how to improve the air tightness of doors and windows.
△San Marco II series system internal opening and inverted window
What is the air tightness of doors and windows
Ability to prevent air penetration
Many people are still unfamiliar with the concept of air tightness of houses. Air tightness is applicable to index terms that measure whether the seal of enclosure structure is tight and whether there is air leakage. The air tightness of the house can be understood as the ability to prevent air penetration under the normal closed state of the outer doors and windows.
In our country's energy saving code, the air tightness standard of doors and windows is stipulated.
Indicator value unit: q1[m3/(m · h)];q2/[m3/(m2 · h)]. The data is taken from the classification and testing methods of air tightness, watertightness and wind pressure resistance of exterior doors and windows of buildings.
Air tightness refers to the ability of the outer (door) window to prevent air penetration under the condition of normal closing. The air tightness of the outer window is directly related to the heat loss of cold air penetration of the outer window. The air tightness is divided into 8 levels. The higher the level, the smaller the heat loss and the better the air tightness. Good air tightness is beneficial to energy conservation and environmental protection.
Good air tightness of buildings has a very important contribution to improving energy efficiency. It involves many fields of architectural physics and not only affects the insulation, moisture-proof, sound insulation and fire prevention of buildings, it is also closely related to shielding harmful substances, ensuring the normal operation of effective ventilation system, optimizing air quality, and creating conditions for improving energy efficiency and comfort.
Good air tightness is not naturally formed, which needs to be considered in all construction links. In the design stage, the air tightness layer of the whole building should be clearly defined, which should be a continuous and uninterrupted closed circle, it covers all heating areas, and pay attention to reasonable arrangement of construction sequence. The red line in the following figure shows the airtight layer identification at the door and window opening.
Detailed drawing of air-tight layer node of window hole
Benefits of air tightness of doors and windows
Winter thermal insulation summer thermal insulation
For areas requiring heat preservation, the temperature difference between indoor and outdoor in winter is very large, and cold air will penetrate into the room, which will lead to heat loss, thus increasing the energy consumption of heating. However, improving the air tightness of doors and windows is helpful to reduce the loss of heat and the overall energy consumption, which is meaningful to the energy saving of buildings.
However, in summer, after the air conditioner is turned on for refrigeration, the indoor temperature difference is also very large. Air leakage will bring a large proportion of total load to non-central air conditioners, improve air tightness, and effectively reduce the energy consumption loss of air conditioners, more energy-saving. Of course, in the transition season, you can properly pull down car window shade and open the fan blades. High air tightness is not easy to ventilate, and natural ventilation becomes more energy-saving and comfortable.
△San Marco II series system internal opening and inverted window
Factors affecting air tightness
Profile installation seal
Door & window profile
The structure and material of aluminum doors and windows have a great influence on the air tightness of doors and windows, while wooden doors and windows have the worst air tightness. Secondly, aluminum doors and windows, injection molded aluminum doors and windows, and advanced system integration
broken bridge aluminum doors and windows the performance is most prominent in air tightness.
Whether the air tightness of doors and windows passes is directly related to the compressive strength of the material, which is easy to deform and rust and oxidize, may lead to gaps between the frame and the glass, and the sealing becomes poor, then there are a series of problems such as air leakage, rain leakage and dust entering.
When purchasing doors and windows, choose aluminum profiles with good quality first to avoid purchasing those with poor quality.
Broken bridge aluminum doors and windows, you can choose big brands
broken bridge aluminum doors and windows to ensure the quality of doors and windows. Recommend choose the doors and windows of Roland Sini system, and use customized ultra-high-precision insulation broken bridge aluminum profiles to ensure its quality and stability.
Door and window installation
The installation of doors and windows is divided into three parts, the frame part, the hinge part of flat doors and windows, and the sliding rail part of push-pull doors and windows. The installation quality is also an important factor that determines the air tightness of doors and windows. After the frame part is vertically positioned and fixed with the iron bar through Styrofoam, the gap needs to be filled with cement. After the cement is solidified, it is better to use a small sealant before sealing, further enhance the tightness.
The hinge part needs to be further adjusted in detail after the installation is completed, so as to further fit the fan blade with the frame and ensure the overall sealing of doors and windows, so as to effectively improve the air tightness of doors and windows.
Door and window rubber steal strip
The most common problem of sealing strip is that the sealing strip cannot match the sealing ring and there are signs of aging cracking, hardening and even pulverization. Roland Sini chose high-speed rail grade EPDM sealing strip with anti-aging, which can reduce the number of times of frequent replacement of sealing strip and ensure its sealing performance at the same time. In addition, dry agent can be sprayed at the Seal of doors and windows to ensure the drying of sealing ring and avoid corrosion of water accumulation.
[This article is reprinted from Roland Sini public account. Only information is transmitted. Please contact us to delete the infringement]]
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