The ALUMINCO W4900 is an advanced aluminium system that combines the proven benefits of hinged windows and doors – elegant design and maximum safety – with the highest thermal insulation requirements.

Three incomparable advantages, the use of 39 mm reinforced polyamides, the EPDM central gasket and the advanced perimeter locking mechanism, all in one system offer an outstanding Thermal Insulation Index Uf ≥1.2 W/m²K.

It constitutes an ideal solution for high-end residential and commercial projects that require high energy efficient performance with a high degree of design along with top functionality.

characteristics Tilt & Turn Highly Thermal Insulating System

Features and Benefits

  • Unique thermal insulation for aluminium windows in accordance with the passive house certification standard.
  • Innovative insulation system thanks to 54 mm polyamides offering Uf value = 0.76 W/m²K with 102 mm face width.
  • Increased sound reduction
  • Μulti-chamber central gasket that ensures optimum impermeability preventing energy loss.
  • Superior safety due to the multiple perimetric locking
  • Vast selection of profiles in straight and curved cross sections.
  • For all typologies of casements and patio doors.



  • ISO 10140-2 Sound Reduction (Rw) 52 dB
  • EN 10077-2 Thermal Insulation (Uf) 76 W/m²K
  • EN 12207 Air Permeability
  • EN 12208 Water Tightness
  • EN 12210 Resistance to Wind Load


  • Casement windows:

1Leaf – 2Leaf – 3Leaf – 4Leaf

  • Casement-awning windows:

1Leaf – 2Leaf

  • Fixed-picture windows