Casement window system aluminium-wood thermal break. Sth Eco is a perfect combination between performance and design. Described as the first hybrid system, thanks to the perfect proportion between two materials that compose it: wood and aluminium. The balance and merging of these elements as mirror make Sth Eco suitable for all needs: beauty and sheer size of the solid wood contrasts with its minimalist sleek lines of aluminium giving to windows an attractive and modern look. Suitable at the same time for more traditional application as ancient historical center.