Reklamnyie myths about windows

The unsophisticated consumer traps unfair advertisers and the propagandists, wishing to sell you the goods. A lot of amusing about modern windows our consumers from advertising have gathered. Here the most widespread advertising gimmicks:

1. Windows at all do not pass a cold in apartment.

Fantastic tales! Actually ANY window is manufactured more heat from your premise on street, than BY ANY wall. I.e., from the point of view of heat, it is necessary to build houses without windows. Wish to live in such cosy small house Windows and doors in any case give 80 % of all teplopoter in the usual house. There are no absolutely warm windows. Alas … However normal modern windows on the average save up heat in your house, than the old wooden twice more effectively. Often say, that at windows with double-glazed windows the condensate drops out. And it is natural, it is physics. If at you on kitchen the third hour cooks soup, windows are closed, and in the street-30o - the condensate will drop out not only at windows - on walls! Modern windows have powerful system of consolidations, it exclude blowing. A back is necessity to air a premise for humidity reduction.

2. Windows completely suppress all street noise.

First, not completely, secondly not any. Tram noise under a window, jackhammer blows, a powerful transport rumble - these low-frequency noise though are hardly weakened by correct windows with correct double-glazed windows, but will be all the same audible. And high-frequency noise are absorbed much better. Subjectively, if without figures noise does not disappear at all, but decreases very essentially. If at you under a window the Garden ring, that is sense to put double-glazed windows with raznotolschinnyimi glasses of 4 mm + 6 mm + 4 mm, it gives additional effect at the expense of partial removal of the phenomena of a resonance. Besides, there is a sense to break a window on bolshee quantity of small parts since the big glasses are more subject to a resonance. Besides, it is necessary to remember, that as soon as you will open a window - all noise isolation will disappear. Therefore if you have seriously decided to struggle with noise, it is necessary to take care of the conditioner.

3. In a double-glazed window - vacuum.

The term "a vacuum double-glazed window" is inexact. If in a double-glazed window really there was a deep vacuum atmospheric pressure would press glasses in a double-glazed window, paternal they is simply burst. Actually at manufacturing in a double-glazed window really there is some depression that glasses nestled on a framework more densely. However it not vacuum in the standard understanding.

4. Windows are absolutely tight.

Tightness of windows is limited to their ability not to pass draughts. The advertising gimmick with manufacturing of an aquarium from windows is known. Really, unsophisticated consumer b’yot on the spot. However usually do not explain, that without special hermetic sealing by plentiful obmazyivaniya all design waterproof hermetic, it will be not an aquarium, and a thin bucket.

5. A thick double-glazed window - the best.

It not absolutely so. This thesis has been put forward newsdealers approximately in 96th year and all their data based on the VISITOR "Window blocks for mass housing construction" editions of 1966. Actually the double-glazed window, unlike wooden (typical Soviet windows), realises not trivial enough idea of restriction konvektivnogo heat exchange. It requires some explanatories. There are some types of heat exchange - by radiation, by konvektsii and by heat conductivity of environment. The most simple example of heat exchange by radiation - radiation solar. A heat conductivity example - it is not necessary to catch at the metal handle of a frying pan - it hot though the flame heats not the handle, and a frying pan. Konvektivnyiy heat exchange is connected with heat carrying over together with air (the warm is lifted - hot falls). In this case along internal (warm) glass air is lifted, and its place takes cold, fallen downwards on a way along outside (cold) glass. Thus between glasses circulation of air which successfully transfers warmly outside, and a cold inside is formed. This kind of heat exchange gives the greatest losses of heat. That circulation was not, distance between glasses do the small. There is a radiation and heat conductivity of air, and air, as is known, an excellent heat insulator. Thus, the distance between glasses has some optimum, and its increase can lead to aggravation of thermal characteristics of a double-glazed window. By our experience, optimum for Moscow on a parity the price-quality is a two-chamber double-glazed window (3 glasses). For reception of higher teplosberegayuschih properties usual glass is replaced with K-glass (energosberegayuschee), capable to reflect a part of thermal radiation back in the house.

6. Windows stand 40$ for square metre.

As to the price, free cheese happens only in a mousetrap. Unfortunately, this principle does not know exceptions. If you were adjusted to replace windows, be ready to that they will not be very much cheap. Qualitatively produced plastic window more cheaply old Soviet stolyarki - a line item any DSK cannot to cost. The prices for windows at all basic Moscow manufacturers about the identical. If to you somewhere offer much more cheaply - something means not so, it is suspicious. Never make the choice, being limited to data on cost of a certain abstract square metre of a window. Be not too lazy, measure at least approximately the windows, be defined with their configuration, with an arrangement, quantity and the sizes of shutters, window leaves, transoms etc., call in firm and count your order. (It is ridiculous, but some sellers continue to use an old advertising course - instructions of the price disregarding the VAT - remember and it). Do not forget to specify in how many to you installation and delivery of the ordered windows and all necessary complete set to them (window sills, otlivyi, transitive profiles, etc.) will manage.

Modern windows represent the difficult design consisting of several tens of different components. For this reason their price, unlike such materials as carpet cover, cannot be defined on the area. Nevertheless, till now in many advertisements there are phrases, type "from 80$/sq.m.", "from 60$/sq.m." or even "from 37$/sq.m." Think,  it should be obvious , that simply advertising, and a key element here is not the figure, and a prefix "from…". Basically a window for 37$/sq.m. to produce it is really possible, but, absolutely precisely, it will be not that window which is required to you. For example, if you decide to order a simple deaf window with a single-chamber double-glazed window and the size 2h2 m it can quite cost 160$, accordingly cost of square metre will be equal 40$ (those advertising "from…").

7. The best double-glazed windows - with filling with argon.

Here there are two essential moments. First, from the point of view of classical physics, heat conductivity of ideal gases depends only on their pressure and more from what. I.e., that air, that argon - all the same. Difference in characteristics of real gases and ideal gas, schitannyie percent. Because of them, in our opinion, it is not necessary to make a fuss with the expensive equipment, cylinders, in itself argon is enough nedeshev. One more moment. How you will check up availability of argon in your double-glazed window? On colour, on taste, on a smell? Without the special device - IN ANY WAY! And check with spectrometer use will manage not more cheaply the window. It is possible to break, of course, a double-glazed window … the Propaganda material about argon it is often enough used as an advertising gimmick - "and at us but with argon" - zazyivno and it is inexpensive - try check up! Thus we do not assert, that double-glazed windows with argon - a continuous linden. We simply urge you not to take a word.

8. Than thicker a profile (speech about plastic windows), the more in it of chambers - the better.

It is senseless to increase a thickness and complexity of a profile, and so its resistance to a heat transfer on the average twice more than at a double-glazed window. So that if the window will be chilled - it in any case will be chilled on glass! And such frosts that the profile of any known manufacturer was chilled, at us simply does not happen. So that do not allow to hammer to itself in a head every possible "design features" and "technological novelties". Three - four-or a five-chamber profile - all it practically will not affect in any way properties of your windows at operation. The profile can be made easily though ten-chamber and to deliver in a window though ten contours of rubber sealants, but it simply is not necessary. Not casually, any serious manufacturer does not dare to take a great interest in similar cheap advertising gimmicks. The standard scheme - the three-chambered profile, two (three) contours of consolidation and a two-chamber double-glazed window (and here it is really useful) is an optimum alternative. All profiles of the basic manufacturers are produced so. Also do not trust not so correct statements of "managers" of some firms. REHAU, VEKA, PROPLEX, KBE, INTERTEC is worse nothing and it is not better one another. Choose any known manufacturer - will not lose.

9. PVC is ecologically harmful.

As it is not regrettable for critics, such judgements occur without delay from illiteracy, than from the real reasons. Really, earlier by production of household windows as the stabilizer lead was used. Now it is replaced by other materials, but, first of all, not because of ecological danger (its contents did not exceed admissible norms), and owing to occurrence of cheaper and technological stabilizers. Allocation of chlorine and other harmful substances - too is more from area of fairy tales (chlorine is connected in connection). For example, such formula as NaCl (table salt) frightens nobody. Nobody refuses for these reasons electric kettles from this PVC though conditions of their operation are more rigid, and temperature of boiling of water above, than temperature of windows in a hot sunny day. Modern PVC of a window do not support burning. Moreover, if in apartment the fire (God forbid) begins, windows with a good double-glazed window in some cases can "extinguish" it. The matter is that windows always played the big role in a fire outcome, – if glasses burst, the air flow inflates a fire. Double-glazed windows – good heat insulators. Therefore if the first glass also bursts from strong difference of temperatures the second, heating up much more slowly, will sustain still any time and will not allow to fire to extend. It is developed also special osteklenie which maintains heats.