More light
The appearance of Patio PSK windows resembles standard balcony windows. The sashes and elements operate on one plane. In order to open a window, one first has to pull it and then slide. A threshold in PSK windows has the same height as in a standard balcony window.
Contrary to standard windows, in PSK system the sash width can even be 2 m. Using “K” scheme within one window structure, we can obtain 4 meters’ transfer light for the total 8-meter width of one window.