Passive House certified windows Steel reinforced PVC profile system with outstanding thermal insulation will keep you warm.. The perfect solution for saving energy. Key features of Steel reinforced PVC system: 7-chamber window system with outstanding thermal insulation properties for Uf values as low as 0.96 W/(m²K) Available with 2 or 3 sealing levels Multiple design options Energy-saving innovative windows of the new generation. Alu Inside is a 7-chamber profile system with excellent thermal insulation properties. Notice on the cross section of the profile that the massive steel reinforcement is missing. This  is an innovative solution for the construction ofRead More