ALT W77 Highly insulated window with hidden sash
ALT W77 HS hidden sash window system with opening elements look like fixed elements provides maximum glazing area and sophisticated faсade look. The system has excellent thermal and AWW performance alongside the minimalist exterior appearance.
Technical information
Opening elements
Fabrication benefits
Video
Color options
Documentation
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Technical information
2500 mm
Maximum sash height
1600 mm
Maximum sash width
150 kg
Maximum infill unit weight
Energy
68 mm
Maximum infill unit thickness
Uf = 1.63 W/m2∙K
Thermal insulation
Uw >= 0,7 W/m2∙K
Thermal insulation
Comfort
class E1200 (1 200 Pa)
Water tightness
class 4 (600 Pa)
Air permeability
class C5 (2 000 Pa)
Wind load resistance
Opening elements
Fabrication benefits
- Outstanding tightness performance.
- Prefabricated windows are shipped to the client under manufacturer warranty.
- Reliable technological equipment.
- Variety of design and installation options.
Color options

1. POWDER COATING
- exclusive collections (Futura, Precis, Anodic);
- variety of surface types (glossy, matte, textured);
- innovative antimicrobial BIO-coating option.
2. ANODIZING
- 9 standard colours;
- possibility to choose different surface treatments (chemical etching, bead blasting, brushing).
3. WOOD-GRAIN EFFECT
- 5 woodgrain options.
Documentation
Direct access to technical documentation, catalogs, BIM objects available
for authorized users.
AUTHORIZATION
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