ALT W77VS Highly insulated ventilation sash
ALT W77 VS is a high quality and easy to integrate solution for effective airflow while remaining safe to use.
Narrow side hung turn sashes of 180 mm or 280 mm width and up to 3 m height. These products are used as an energy efficient solution for ventilation.
Hidden sash windows application:
- windows walls;
- curtain walling;
- unitized curtain walls.
Ventilation sashes will complement and emphasize large glazed façades. Available in variety of coating types and colours this system can create an architectural accent in any project. Easy fabrication and installation of the windows are the result from the perfect system engineering.
Two sashes design are available: classic and structural.
Classic sash consists of a solid aluminium profile, which optionally may be paint coated or finished to achieve any texture or colour.
Structural sash is a custom solution where enameled glass is glued to the outside surface of the sash profile.
This solution fits neatly into the structural glazing curtain walls by imitating a blind section.
- Maintaining comfortable temperature and microclimate inside the premises.
- Protection from dust, fume and other harmful substances penetrating from the street.
- Long service life of the windows.
- W77 windows correspond to modern architectural trends.

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.
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