Characteristics of system: Windows of IV92 system are made of three-ply window timber blanks; Windows are made with installation depth of 92mm (triple glazing); Thermal insulation coefficient - Uw = 0.67 W/m2K; Standard version: glazing unit 4/18Ar/4 Ug=0,5 W/m2K; High quality furniture produced in the German company “SIEGENIA” is used, providing long and perfect service life for windows; There are used eco-friendly water-based paints; the colors are available in RAL catalogue; security window handle HOPPE Secustic - against drilling outside.