FIELD: construction.
SUBSTANCE: double-layer window comprises many vertical stands and a horizontal window beam; many external and internal folds. Each pair of external and internal folds is installed in each area formed by a horizontal window beam and vertical window stands. External and internal folds of each pair are spaced from each other, forming a cavity between them. In the horizontal window beam there are ventilation facilities providing for penetration of external air through them into a cavity formed between inner and outer folds. Vertical window stands comprise both external vertical window stands and many internal vertical window stands. In the inner vertical window stands there is one or more ventilation holes.
EFFECT: invention will make it possible to provide for prevention of moisture condensation without the necessity to open an inner or an outer fold.
4 cl, 8 dwg
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