Inward opening (also known as tilt-and-turn) windows are traditional to Central Europe. DK13-3k Window is a solid wooden window with the 78 mm profile system and a glazing unit with two low-E and one regular glass, Argon filled cavities and the total thickness of 40 mm. For the warm edge solution it is recommended to use SGG Swisspacer spacer bars as a warm edge solution.
Typical opening type is side hung (turn) combined with the ventilation opening (tilt from top of the sash): tilt-and-turn window. Thermal transmittance of the standard window is Uw = 0,94 W/²K