The thermally insulated frame grille is manufactured from aluminium profiles AlMgSi 0.5 according to EN 12020-2. It is equipped with a thermal insulation panel filled with PUR foam, and the sandwich panel can be powder-coated on both sides if required. The opening dimensions are produced according to specification. The finish is available in natural or bronze anodised (20 microns) or powder-coated in any RAL, Sikkens, NCS or Interpon colour with a coating thickness between 60 and 80 microns.