This European Standard specifies the material, dimensional and performance requirements, including methods of test, for factory-made concrete flue liners and fittings for the construction of multi-wall chimneys. This standard also applies to storey-height and reinforced flue liners. NOTE 1 Classes in this standard, unless otherwise specified, e. g. temperature pressure, are not derived from conditions referred to in article 3.2 of Directive 89/106/EC, and should only be considered as technical classes in the sense of Commission Guidance Paper E `Levels and classes in the Construction Products Directive'. NOTE 2 Any reference to the term flue liners implies both flue liners and their fittings, except where otherwise indicated.