Alitherm 800

The Alitherm range of windows offers all you would expect from a quality system – Greater comfort, better insulation, minimal maintenance, aesthetically pleasing appearance and enhanced security. In short, the Alitherm product range offers you peace of mind but even more it represents a sound investment in your property.


All general light use applications.


  • Highest thermal performance window suitable for all general use applications
  • Will achieve U Values under 1.6w/m²K when used in conjunction with correct double glazed sealed unit
  • Alitherm 800 windows achieve a Window Energy ‘A’ Rating.
  • Extended chambered Polyamide thermal breaks provide excellent thermal performance.

Technical Specifications

Product CategoryWindow
Product Sub CategoryCasement
U Value (W/m2K)1.6
Doc L 2010Yes

Projects featuring Alitherm 800