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.

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
Side hung
Tilt (bottom-hung)
Tilt-and-turn
  • Outstanding tightness performance.
  • Prefabricated windows are shipped to the client under manufacturer warranty.
  • Reliable technological equipment.
  • Variety of design and installation options.
powder coating

1. POWDER COATING

  • exclusive collections (Futura, Precis, Anodic);
  • variety of surface types (glossy, matte, textured);
  • innovative antimicrobial BIO-coating option.
anodizing

2. ANODIZING

  • 9 standard colours;
  • possibility to choose different surface treatments (chemical etching, bead blasting, brushing).
wood-grain effect

3. WOOD-GRAIN EFFECT

  • 5 woodgrain options.

Direct access to technical documentation, catalogs, BIM objects available
for authorized users.

AUTHORIZATION

Log in if you have already been granted access to the ALUTECH Personal Account.

Send a request for access to the ALUTECH Personal Account if you do not have access yet.