Opening and closing a triple-sash window

  1. Place the window handle on the primary sash in the turning position.
  2. Open the primary sash.
  3. Place the window handle on the secondary sash in the turning position.
  4. Open the secondary sash.
  5. Swing the handle on the centre sash inwards.
  6. Open the centre sash.
  7. Always close the centre sash first and swing the handle inwards. Then do the same with the secondary sash before finally closing the primary sash.