The all-around locking hardware provides unparalleled security and insulation values.
By turning the door handle to the top position the sash is engaged in tilt mode, allowing the door to tilt inwards at the top to create cross ventilation without compromising security.
By turning the handle to the horizontal position, the sash is engaged in turn mode. This allows the door to turn like a normal inward opening side hung door.
With the handle in the downward position the door sash is compressed against the rubber gasket and the frame, leaving the unit completely sealed and locked at multiple points.