It is a concealed wing joinery system that can be integrated into the ST 60 system.
In addition to the use of visible hinges, it also provides an elegant appearance both inside and outside with the use of hidden hinges.
Waterproofness
E 900 (900 Pa)
Heat Transmission Coefficient
Uw: ≥ 2.1 W/m2K/Uf: ≥ 3.5 W/m2K
Air Permeability
Class 4 (600 Pa)
