Requirements to it were dictated more by practical considerations – 'bandwidth' of sunlight and maximum protection shelter from the cold. As technology and communications have moved away from the windows of their former counterparts, not only on the material. Requirements for them has increased dramatically – here and durability, and good ventilation properties, and the exclusion of the draft, a good sound and heat insulation, easy to use and maintain. Besides structural and operational features, to the window and assigned an aesthetic function – it must be in harmony with the whole room, make color and style unity. Suffice it to say that the cornerstone of a wooden windows – glass – for its diversity in the market has reached a range which would not even dream of our ancestors. In insulating glass units are now used various types of glass: colorless polished, tinted, patterned, tempered, laminated glass (laminated), mirror, bulletproof. There was a special energy-efficient K-glass, which, thanks to a special coating provides a smooth passage into the room short-wave sunlight, but delays the exit from her long-wave heat radiation. This heat saving property could not be more true for the Russian winters.
The choice of window designs and rich – and single- Two masts, all colors, shapes and sizes. They vary in design – opened in different ways by different types of wings – a simple, sliding, povortnye, swing-out. There were windows – Sealed design for high levels of thermal insulation and noise absorption. They do not freeze and do not mist over even at temperatures up to – 45 degrees Celsius.