This draft European Standard specifies requirements and the basic performance criteria for chimneys@ flue liners@ connecting flue pipes@ fittings and accessories@ used to convey the products of combustion from combustion appliances to the outside atmosphere. This draft European Standard is to be used as a reference for all product standards of CEN/TC 166. This draft European Standard specifies sootfire resistant chimneys@ flue liners@ connecting flue pipes@ fittings and accessories for combustion appliances burning solid@ liquid and gaseous fuels and nonsootfire resistant chimneys@ flue liners@ connecting flue pipes@ fittings and accessories for combustion appliances burning liquid and gaseous fuels only. It also specifies sootfire safe accessories for combustion appliances burning solid@ liquid and gaseous fuels. NOTE 1 This means that chimneys@ flue liners@ connecting flue pipes@ fittings and accessories designated ??O?? are not suitable for combustion appliances burning solid fuel. This draft European Standard also identifies minimum requirements for marking@ manufacturer's instructions@ product information and provides guidance for the attestation and verification of constancy of performance (AVCP). This draft European Standard does not apply to structurally independent chimneys and custom-built chimneys consisting of non-CE-marked components. NOTE 2 This draft European Standard can be used as a basis for the specifications of products covered by a European Technical Assessment. NOTE 3 All product standards drafted by Technical Committee CEN/TC 166 are based on the Mandate M/105