77IWE Open-Out Window




The new 77IWE (Open-out) 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

Application type

Ideal for residential and commercial applications incl. houses, apartments, villas, public buildings, hospitals, schools and industrial buildings.

  77IWE - Open out 77IWE HI - Open out
U value W/m²K (Double glazing) : 1.4 W/m²K 1.3 W/m²K
U value W/m²K (Triple glazing) : 1.2 W/m²K 1.1 W/m²K
BRE Green Guide rating : A, B Rated A, B Rated
Acoustic performance (dB) : - -
Air tightness (Pa) : Class 4 (600 Pa) Class 4 (600 Pa)
Water tightness (Pa) : E1050 (1050 Pa) E1050 (1050 Pa)
Wind load (Pa) : C5 (2400 Pa) C5 (2400 Pa)
Security PAS 24 : X X
Certifications : Q-mark Q-mark
Secured by design : X X
Tilt & turn : - -
Top hung : X X
Side hung : X X
Bottom hung : X X
Punched openings : X X
Triple glazing : X X
100 mm restriction : X X
Size limits
Top hung (max weight) : 180 Kg 180 Kg
Side hung (max weight) : 55 Kg 55 Kg
Dual color option : X X
Multi-point locking : X X
Locking handle : X X
Folding opener : X X
Trickle ventilation : X X