Even if a couple of years ago, friends or relatives advised you those double-glazed windows that retain heat better and look more beautiful, today ten times more manufacturers have appeared on the market, and the choice on the advice of relatives, alas, is obsolete. This problem arises more often for those who are ripe for the renovation of an old apartment or have purchased housing on the secondary market - as a rule, new buildings are equipped with double-glazed windows of the basic configuration, and this is enough.
To understand which double-glazed windows to order, which ones are best suited for "Khrushchev", "Stalin" or "Czech", you need to understand not only the engineering tricks of the building, but also the manufacturing companies, and most importantly - characteristics of different types of windows.
Indicators of the specific functionality of double-glazed windows
Often, manufacturers play on the ignorance of buyers with incomprehensible numbers and characteristics: “We install sliding double-glazed windows with a thickening of up to 36 mm, 4-6-4-6-4, 0.54 m2 C ° / W. Quickly and efficiently . So think about whether they fooled you or didn’t have time.
Let's start with the simplest andmodifiable characteristics of double-glazed windows - such as thickness. Firms insist on the need to use window packages with a width of exactly 36 mm instead of the established 24 mm, operating on the fact that such windows are 60-70 percent warmer. In general, this is true from the point of view of physics, because double-glazed windows - which ones are best shown with an example - consist of several blocks according to the “sandwich” scheme. Between the glasses there are gas fillers: oxygen requires 15 mm distance between the glasses, krypton - 9 mm, argon - 12 mm. But here we are studying the effect of recoil only, losing sight of radiation, which is associated with up to 75% of heat loss. This is where the answer to the question lies: the thermal conductivity of windows depends not only on the thickness of the packages, and ordering them thicker than 24 mm is almost meaningless.
Another factor in the requirements for the task: "Insulating glass - which is better to choose?" - the temperature of the internal surfaces of the glass blocks. The presence of condensate depends on it - an unpleasant surprise that loggias and balconies surprise in the cold season. The lowering of cold air streams to the bottom of the double-glazed window plays its role here - thus only the edges of the windows fog up.
How not to fall for the bait and choose the best double-glazed window
Before making a purchase and drawing up an installation contract, study the attached documentation for windows and compare it with the requirements of SNiP: what is the resistance, thickness and heat transfer of the package, the internal temperature of the glass surface?
Remember that brightpromotional offers of tempting additional features are often necessary only to increase demand, in fact, only worsening or not affecting the functionality of windows. Much also depends on the installation work. For example, it is not a fact that sound insulation is determined by the thickness of the glass - rather, the number and type of air layers, the uniformity of the glass thickness and their composition.
Thinking about which double-glazed windows are better to choose, pay attention to the presence of brand names, markings and the presence of heavy compounds - lead and cadmium. After all, high-quality windows in an apartment are not only communication with the outside world, but also a guarantee of the he alth of households.
