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ConceptSystem 77 Softline Window

Technical information



Thermal insulation - Uf
1.8 W/m²K
Thermal insulation - Uw
1.5 W/m²K


Air tightness
Class 4 (600Pa)
Water tightness
Class 9A (600Pa)
Wind load resistance
Class C5 (2000Pa)


Opening & closing resistance
Class 3
* Note: Performances and properties may be different depending on the profile combinations


Max. dimensions & weight

Min. height of element
668 mm
Max. height of element
2868 mm
Min. width of element
518 mm
Max. width of element
1268 mm
Min. height of vent
600 mm
Max. height of vent
2800 mm
Min. width of vent
450 mm
Max. width of vent
1200 mm
Max. weight of vent
170 kg


Min. frame width (inward opening)
51 mm
Min. vent width (inward opening)
33 mm
Min. frame-vent width (inward opening)
89 mm
Min. vent-vent width (inward opening)
144 mm
Min. width T-profile
76 mm
Depth frame
68 mm
Depth Vent
77 mm
Depth frame-vent
77 mm


Rebate height
25 mm
Glazing method
Dry glazing Siliconized glazing Internal glazing Glazing bead
Min. glass thickness - frame/element
16 mm
Max. glass thickness - frame/element
28 mm
Min. glass thickness - vent
6 mm
Max. glass thickness - vent
40 mm