Air permeability class 4 - DIN EN 12207
Watertightness class 9A - DIN EN 12208
Concealed sash on the outside - so more glass and less frame
Elegant, narrow sash view on the inside
High sash stability thanks to circumferential adhesion with high-valued tested adhesive tapes between glass and frame
Very good thermal insulation values thanks to large, more-walled thermal dividing profiles
Frame's insulation value Uf = 1.7 W/m²K
Triple circumferential rabbet seal
Generally total-glass-thickness of 30 mm
Easy maintenance thanks to light frame-rate and high self-purifying effect
