Very good thermal insulation parameters in attractive price, that allow much better to reduce heat losses in the flat. 5-chamber profiles of the frame and the sash made exclusively of prime material in A-class with installation depth 70 mm. Glazing thickness up to 40 mm. One-chamber glass package with thermal transmittance -Ug = 1,0 W/(m2K) m in standard. The possibility to apply three-glass package with Ug = 0,7 W/(m2K); the possibility to apply glasses with enhanced sound insulation, temepered, safety, anti-burglary, ornament or solar protective. High safety level guaranteed by ACO MULTI MATIC KS with two anti-burglary bolts in standard. The system is available in 43 Renolit foil colours. Sound insulation -Rw = 34-44 dB depending on applied glass packages The window is equipped with a system of double sealing; external, internal made of EPDM, available in black, grey and graphite colours. The rounded shape of the profile with sach design IGLO 5 and IGLO 5 Classic.