Regarding energy-saving doors and windows, the country has not yet issued specific standards and indicators. But as an industry person, I want to talk about my understanding of energy-saving doors and windows. In fact, the term energy-saving doors and windows has been mentioned in the industry, but I think these views are somewhat one-sided.
The general view is that energy-saving windows and doors are actually coated glass, low-e glass, etc., as long as this form of glass can be called energy-saving doors and windows. I don't quite agree with this point of view. When it comes to doors and windows, it is actually a huge industrial chain, and it is also a combination of multiple marginal disciplines. For example, the rubber industry, such as the wood processing industry, non-metal surface treatment and many other disciplines. Any small detail will affect the overall performance of the door and window. For example, if the rubber strip is used in the market, it may take less than a year for the rubber strip to age, deform, and cause air leakage. The sealing effect is very poor. What about energy saving? I think energy-saving doors and windows should be from the following aspects. Considering:
First, the door and window material
Now the doors and windows are made of aluminum alloy, plastic steel, plastic, solid wood, and possibly some iron. There is a common sense that everyone knows that iron and aluminum have very high thermal conductivity, and a little heat will be emitted, so the winter house is always cold. Plastic steel windows and plastic windows have been popular in recent years, but the strength of the window is not strong enough, it is easy to become brittle, and the safety can be imagined. At present, wooden windows are the most energy-saving and environmentally friendly, but wooden windows have their own defects, are not easy to burn, are prone to decay, and are easy to crack. But after special processing and technical treatment, the wood is very stable. But at the same time, the price of wooden windows is not cheap.
Second, the glass
Glass occupies most of the area of ​​doors and windows, so it plays a very important role in energy-saving indicators. There are several types of glass on the market: one is ordinary glass, which has not been tempered; the other is ordinary tempered glass; the third is coated glass; the fourth is low-e glass. Each glass can also be subdivided. So which kind of glass has the best energy-saving effect? ​​It should be low-e glass, which can filter out harmful light such as infrared rays, far infrared rays and ultraviolet rays, and the energy saving effect is remarkable. In recent years, the state has demanded that high-rise buildings use insulating glass, which is two-layer glass. But look at the hollow glass on the market side is plausible, it may be just a simple two layers together, the real insulation effect is not achieved. In Germany, their buildings have been required to be three-story glass. To be honest, it is also hollow glass. The hollowness of China and the hollowness of Germany are also far apart.
Third, door and window energy saving is the overall energy saving
When it comes to the energy saving of doors and windows, it is actually the energy saving of the whole window. It is impossible to achieve energy saving by relying solely on glass. The sealing performance of doors and windows is also an important parameter affecting energy saving. If there is a problem with the sealing of the doors and windows, the energy will also be easily lost. The sealing of doors and windows includes the following aspects. First, the choice of sealing material. The good sealing strip is flexible and elastic, and has strong weather resistance. Even at minus 20°, it can maintain its toughness. In addition to the sealing strips, the doors and windows need to be treated with special techniques to balance the pressure difference between the inside and the outside, and the sound of the doors and windows screaming and disappearing disappears.
All in all, the energy saving of doors and windows depends not only on the material, but also on the glass, and on the process of the doors and windows.
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