It is one of the most advanced to date wooden profile systems. Due to the offset set the aluminum set on the leaf and the frame is in the same plane (coplanar), which also allowed to use the widest glazed window of 54mm. Profile ALU 109 on the inside does not have a glazing bead and this window unit is very interesting, because it can be applied as in the classic interior design, and in the Art Nouveau style, using different cutters to create a rounding of the glazing bead conditional zone. The mounting depth of the profile system is 94 mm. Profile ALU 109 has high noise and heat insulation; the ability to install hidden fittings and child protection.