This document describes the method of specifying the design, installation and labelling criteria for system chimneys, construction of custom-built chimneys, the relining of existing chimneys and connecting flue pipes for non-room sealed combustion appliances as well as the use of chimney products. It also gives information on commissioning of chimneys. This document applies to chimneys which are subject to the following limiting conditions (specified in EN 13084-1 - freestanding chimneys): the horizontal distance between the building and the chimney outer wall not to exceed 1 m; the distance between the supports not to exceed 4 m; the distance above the last structural attachment not to exceed 3 m. The methods in this part of this document are applicable to chimneys and connecting flue pipes for non-room sealed combustion appliances. The methods in Part 2 of this European Standard are applicable to chimneys and connecting flue pipes for room sealed combustion appliances. For the purpose of this document the term installation includes construction.