The system MB-59S CASEMENT is the modern construction used to build tilt and turn windows open outside- both economic and having a good functional properties. The values of coefficients of the window heat transfer and door frames in the HI vary from 0.1 to 0.5 W / (m2K) lower than values obtained for similar profiles of the base system. The minimal coefficient Uf for system profiles MB-59S Casement HI equals 2,1 W/(m2K). The windows opened outside based on standard window-door system was created mainly for users from British Isles, who use this type of solution frequently. These products have their followers also on different markets.