ST 91 combines thermal insulation and EPDM sealing with a minimalist profile design. It is suited to hotels, residences and other projects that prioritize natural light and uninterrupted views.

The system can integrate shutter and insect-screen solutions, supports multi-point locking and offers a recessed version that conceals the sash within the wall for a wider opening.

Key specifications:
Frame depth: 94 mm
Fixed visible width: 44 mm
Vent visible width: 74 mm
Sash depth: 36 mm
Glazing thickness: 20-28 mm
Maximum sash size: 2000 x 2700 mm
Maximum sash weight: 160 kg