scope:

This document specifies the characteristics of performance for single and multi-wall system chimneys with rigid metal liners composed of chimney sections, chimney fittings, terminals and supports with nominal diameter up to and including 1 200 mm, used to convey the products of combustion from appliances to the outside atmosphere.

This document also specifies characteristics for the air supply ducts of concentric chimneys for roomsealed application, made out of metal or plastic (without fibre stabilization).

Additionally, it specifies assessment and verification of constancy of performance (AVCP).

NOTE 1 Metal liners and metal connecting flue pipes, not covered, are included in prEN 1856-2:2021.

NOTE 2 This document does not apply to structurally independent chimneys.