Frame section 70x87mm with dual thermoacoustic gasket. Sash section 80x62 mm with extruded aluminum covering profiles on the exterior side, acoustic gasket, 90° junction of stiles and rails (patented system). Glass mm. 28 for an excellent thermal and acoustic insulation. asymmetrical (AS) central mullion. The bottom frame rail, designed for water drainage , can be made of wood with an extruded anodised aluminium profile on the external side. Door-window with extruded anodised aluminium thermal break threshold of H = 44mm.