Even if a couple of years ago, friends or relatives advised you of those double-glazed windows that better keep warm and look prettier, today ten times more manufacturers have appeared on the market, and the choice on the advice of loved ones is, alas, morally outdated. This problem often arises for those who are ripe for the repair of an old apartment or bought housing in the secondary market - as a rule, new buildings are equipped with double-glazed windows of the basic configuration, and this is enough.
In order to understand which double-glazed windows to order, which of them are best suited to the "Khrushchev", "Stalin" or "Czech", you need to understand not only the engineering tricks of the building, but also in the manufacturing companies, and most importantly - the characteristics of different types of windows.
Indicators of the specific functionality of double-glazed windows
Often manufacturers play on the ignorance of customers with incomprehensible numbers and characteristics: “We install sliding double-glazed windows with a thickness of up to 36 mm, 4-6-4-6-4, 0.54 m2 ° / W. Quickly and efficiently". So think about it, they circled you around your finger or didn’t have time.
Let's start with the simplest and most modifiable characteristics of glass units - 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 in 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 are better shown by example - consist of several blocks according to the “sandwich” scheme. Between the glasses there are gas fillers: oxygen requires 15 mm of distance between the glasses, krypton - 9 mm, argon - 12 mm. But here we study the effect of only recoil, losing sight of the radiation with which up to 75% of heat loss is associated. This is where the answer to the question lies: the thermal conductivity of the windows depends not only on the thickness of the packages, and ordering them thicker than 24 mm is almost pointless.
Another factor of the requirements for the task: "Double-glazed windows - which are better to choose?" - the temperature of the inner surfaces of the glass blocks. The presence of condensate depends on it - an unpleasant surprise that balconies and balconies surprise in the cold season. Lowering the cold air currents to the bottom of the glass packet plays a role here - only the edges of the windows are fogged.
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 bag, the internal temperature of the glass surface?
Remember that bright advertising offers of tempting additional functions are often necessary only to increase demand, in fact, only worsening or not affecting the functionality of windows. Much also depends on installation work. For example, it is not a fact that noise insulation is determined by the thickness of the glass - rather, the number and type of air layers, the uniformity of the thickness of the glasses and their composition.
When thinking about which double-glazed windows it is better to choose, pay attention to the presence of brand names, markings and the presence of lead and cadmium in the composition of heavy compounds. After all, high-quality windows in the apartment are not only a communication with the outside world, but also a guarantee of the health of households.