Wood-aluminium system for passive housing


The GEMINI Passiv is a wood-alu system for window constructions designed for passive housing. Thanks to its high utility and durability in the form of excellent thermal insulation, above average tightness, air permeability and wind load resistance, this system is suitable for modern, energy-saving and high performance buildings.



The system utilizes innovative insulation material of high durability foamed PS, which shares the properties of wood. Thanks to its high level of rigidity, Gemini assembly clips can be screwed directly into it. Additional components that distinguish this system from more traditional wood-alu designs include the broadened main gasket, PE cord, additional central gasket, and the use of a Swisspacer Ultimate warm edge spacer bar.




  • Welded corner connections
  • Crimped corner connections
  • Certified wood section thickness 68 – 92 mm
  • Certified glazing thickness 24 – 44 mm
  • Acoustic insilation 32 – 45 dB
  • Thermal transmittance 0,76 – 0,61 W/m2K
  • Security class to RC1, RC2


Gemini Passiv, as a certified component of Passivhaus Institut, meets its requirements for passive housing. That is Gemini Passiv Uw < 0.80 W/(m²K) in combination with triple-glazing Ug = 0.7 W/m²K for cool-temperate climate and Gemini Passiv Ultra Uw installed Uw < 0.80 W/(m²K) in combination with triple-glazing Ug = 0.52 W/m²K for cold climate.