Large buildings and wide shop fronts can be closed and reopened conveniently and barrier-free across the entire area with the Sunflex horizontal sliding wall systems. The individual glass panels are not connected to each other. Thus, they can be parked in a space-saving manner not only at the ends, but in any individual position. Since the system does not require any bottom track at all, no connections are necessary in the floor area. This also makes the panels ideal as room dividers and dividing walls.