The design of HS76 includes 76 mm (2.99 Inches) wide leaves with 4 chambers. The use of baseplates with a higher moment of inertia allows joinery with a wider space. Both aluminum and uPVC (vinyl) can be used as the bottom frame. The system uses special gaskets to provide an excellent level of insulation. In addition, it is possible to use glazing up to 45 mm (1.77 inches) thick.
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