KELLER MINIMAL WINDOWS® NG S4 + NG S5

Keller minimal windows pushed itself even further with the design and implementation of the new NGS system. This sliding system made of 99% glass, boasts of even higher performance than previous systems. The floor profile is only 5 mm (gasket), vertical mullions of 26mm, each single sash can reach up to 18 square meters and 1500 kg in weight. Performance: - thermal transmittance 0.65 W/(m²K) - burglar-proof RC3 - sound insulation 46 dB - air permeability 4 - rain tightness 8A - wind resistance C5