Alunet BF73

As an enhancement on the known and loved BF73 bifold system, the super slim profile sections of the ALUNA bifold system minimise the visible framework and maximise the glass area, with sightlines of just 107 mm from frame to sash.Offering one of the largest sash sizes available, up to 1200mm wide and 3000mm high per pane, the ALUNA bifold system also has part L compliant U-values as low as 1.4 W/m2K, DER Rating B, when combined with highly energy efficient glass, and is secure to PAS24.