The new 77IW (Open-in) window system is designed to meet the most demanding performance requirements, including thermal, weathering and security - ideal for any building, whether refurbishment or new build, high rise or low rise.

Design features

  • High levels of thermal performance
  • Thermal polyamides, insulated centre seals and foam insertions
  • Integrates with AluK curtain wall and door systems


  • Wide variety of configurations
  • Available in single or dual colour options, including anodised finishes