Sternfenster has launched its new, A-Rated Alitherm 400 casement window.

The Alitherm 400 can achieve a U-value of 1.2W/m2K with a triple glazed unit (with a centre-pane U-value of 0.8W/m2K.

The 70mm thermally broken aluminium window also passes BS EN 1026 (air permeability), BS EN 1027 (water tightness) and BS EN 12211 (wind resistance). It also comes with a flush sash option and can meet PAS24 or Secured By Design requirements thanks to optional sash claw locks.

It is available in lead times as short as five days.

The new window comes with Sternfenster’s new Quickglaze knock-in glazing bead with co-extruded gaskets, which helps reduce time spent on site because less time is spent hunting for parts, and installation is very swift – potentially shaving hours off a job.

Additional features include dual colour options, trickle vents, triple glazing up to 38.8mm, and mega egress hinges if the window needs to offer a fire escape route.

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