National foreword

This British Standard is the UK implementation of EN 13384‑ 1:2015+A1:2019. It supersedes BS EN 13384‑1:2015, which is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by.

The UK participation in its preparation was entrusted to Technical Committee B/506, Chimneys.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2015.

This European Standard was approved by CEN on 24 January 2015 and includes Amendment 1 approved by CEN on 27 April 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

This document (EN 13384‑1:2015+A1:2019) has been prepared by Technical Committee CEN/TC 166 “Chimneys”, the secretariat of which is held by ASI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2020, and conflicting national standards shall be withdrawn at the latest by January 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 13384‑1:2015.

This document includes Amendment 1 approved by CEN on 26 June 2019.

According to EN 13384‑1:2002+A2:2008 and EN 13384‑1:2015+A1:2019 the following fundamental changes are given:

editorial mistakes have been corrected;
mistakes in formulas have been corrected;
for wood the rise of the dew point to take into account the acid condensation has been deleted;
table for material characteristics in Table B.5 has been adapted to EN 15287‑1 and supplemented by radiation coefficients;
in Calculation of thermal resistance according to Annex A are linked to the method of EN 15287‑1 for taking into account the temperature dependence has been added;
for non-concentric ducts the calculation of the mean temperature of the air supply has been amended;
for chimney fans a calculation procedure has been added;
“heating appliance” replaced by “combustion appliance”;
New calculation for combustion air mass flow introduced;
“Supply air” replaced by “combustion air".

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.

The start and finish of text introduced or altered by amendment is indicated in the text by tags ".

This European Standard “Chimneys — Thermal and fluid dynamic calculation methods” consists of three Parts:

Part 1: Chimneys serving one combustion appliance
Part 2: Chimneys serving more than one combustion appliance
Part 3: Methods for the development of diagrams and tables for chimneys serving one heating appliance

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

1 Scope

This European Standard specifies methods for the calculation of the thermal and fluid dynamic characteristics of chimneys serving one combustion appliance.

The methods in this part of this European Standard are applicable to negative or positive pressure chimneys with wet or dry operating conditions. It is valid for chimneys with combustion appliances for fuels subject to the knowledge of the flue gas characteristics which are needed for the calculation.

The methods in this part of this European Standard are applicable to chimneys with one inlet connected with one appliance. The methods in Part 2 of this European Standard are applicable to chimneys with multiple inlets and one inlet with multiple appliances. Part 3 describes methods for the development of diagrams and tables for chimneys serving one combustion appliance.

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Calculation method for non-balanced flue chimneys

5.1 General principles

5.2 Pressure requirements

5.3 Temperature requirement

5.4 Calculation procedure

5.5 Flue gas data characterising the combustion appliance

5.6 Characteristic data for the calculation

5.7 Basic values for the calculation

5.8 Determination of the temperatures

5.9 Determination of the density of the flue gas and the velocity of the flue gas

5.10 Determination of the pressures

5.11 Minimum draught required at the flue gas inlet into the chimney and maximum allowed draught (P_Ze and P_Zemax) and maximum and minimum differential pressure at the flue gas inlet into the chimney (P_ZOe and P_ZOemin)

5.12 Calculation of the inner wall temperature at the chimney outlet (T_iob)

6 Secondary air for negative pressure chimneys

6.1 General

6.2 Calculation method

6.3 Basic values for the calculation of secondary air

6.4 Pressures

6.5 Temperature requirement with secondary air

7 Calculation method for balanced flue chimneys

7.1 General principles

7.2 Pressure requirements

7.3 Temperature requirements

7.4 Calculation procedure

7.5 Flue gas data characterizing the combustion appliance

7.6 Characteristic data for the calculation

7.7 Basic values for the calculation

7.8 Determination of the temperatures

7.9 Determination of densities and velocities

7.10 Determination of pressures

7.11 Minimum draught required at the flue gas inlet into the chimney and maximum allowed draught (P_Ze and P_Zemax) and maximum and minimum differential pressure at the flue gas inlet into the chimney (P_ZOe and P_ZOemin)

7.12 Calculation of the inner wall temperature at the chimney outlet (T_iob)

8 Consideration of the condensation heat of the flue gas water vapour

8.1 General

8.2 Onset of condensation

8.3 Calculation of the flue gas temperature at the outlet of a chimney segment with condensation (j ≥ NsegK)

9 Consideration of chimney fans

9.1 General

9.2 Inline fans

9.3 Exhaust fans

BS EN 13384-1:2015+A1:2019

Chimneys. Thermal and fluid dynamic calculation methods - Chimneys serving one combustion appliance

Current, Under Review

Published:

31 Aug 2019