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Non-facing sashes and weatherstrips with a characteristic undercut give our window the unparallel appearance. Very robust design with 68 mm of frame height and installation depth of 60 mm guarantees high stiffness. Thickness of external chamber walls as high as 3 mm makes it possible to design large fenestration. FORIS 100 assures perfect acoustic and thermal insulation, the U-factor (coefficient of thermal insulation for windows profiles) is Uf=1.6 W/(m2xK). Due to traditional design and durable and reliable structure the FORIS 100 system is suitable for any types of buildings.