EN 15287-1:2023

Chimneys - Design, installation and commissioning - Part 1: Chimneys and connecting flue pipes for non-room sealed combustion appliances

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 an installed chimney.
This document applies to chimneys which are subject to the following limiting conditions:
-   the distance between the supports not to exceed 4 m;
-   the distance above the last structural attachment not to exceed 3 m;
-   the free-standing height above the uppermost structural support attachment for chimneys with rectangular cross section is not more than five times the smallest external dimension.
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 document are applicable to chimneys and connecting flue pipes for room sealed combustion appliances.

Abgasanlagen - Planung, Montage und Abnahme - Teil 1: Senkrechte Teile von Abgasanlagen und Verbindungsstücke für raumluftabhängige Verbrennungseinrichtungen

Dieses Dokument beschreibt das Verfahren zur Festlegung der Planungs-, Montage- und Kennzeichnungskriterien für System-Abgasanlagen, Montage-Abgasanlagen und die Sanierung bestehender senkrechter Teile von Abgasanlagen und Verbindungsstücke für raumluftabhängige Verbrennungseinrichtungen sowie die Verwendung von Produkten für Abgasanlagen. Es enthält auch Angaben zur Endkontrolle einer eingebauten Abgasanlage.
Dieses Dokument ist anwendbar für senkrechte Teile von Abgasanlagen, die folgenden Randbedingungen genügen:
—   der Abstand zwischen den Abstützungen überschreitet 4 m nicht;
—   der Abstand zur letzten Abstützung überschreitet 3 m nicht;
—   die freistehende Höhe über der obersten Abstützung beträgt bei Abgasanlagen mit rechteckigem Querschnitt höchstens das Fünffache der kleinsten Außenabmessung.
Die Verfahren in diesem Teil dieses Dokuments sind anwendbar für senkrechte Teile von Abgasanlagen und Verbindungsstücke für raumluftabhängige Verbrennungseinrichtungen. Die Verfahren in Teil 2 dieses Dokuments sind anwendbar für senkrechte Teile von Abgasanlagen und Verbindungsstücke für raumluftunabhängige Verbrennungseinrichtungen.

Conduits de fumée - Conception, installation et mise en service - Partie 1: Conduits de fumée et conduits de raccordement pour appareils de combustion qui prélèvent l’air comburant dans la pièce

Le présent document décrit la méthode permettant de spécifier les critères de conception, d’installation et d’étiquetage relatifs aux systèmes de conduits, aux conduits de fumée construits sur site, au tubage des conduits de fumée existants et aux conduits de raccordement pour appareils de combustion qui prélèvent l’air comburant dans la pièce, ainsi qu’à l’utilisation de composants de conduits de fumée. Il fournit également des informations pour la mise en service d’un conduit de fumée venant d’être installé.
Le présent document s’applique aux conduits de fumée soumis aux conditions contraignantes suivantes :
-   la distance entre supports ne doit pas dépasser 4 m ;
-   la distance au dessus de la dernière fixation à la structure ne doit pas dépasser 3 m ;
-   la hauteur libre au dessus de la fixation la plus haute des supports à la structure pour les conduits de fumée avec section rectangulaire n’est pas supérieure à cinq fois la plus petite dimension extérieure.
Les méthodes mentionnées dans cette partie du présent document sont applicables aux conduits de fumée et conduits de raccordement pour appareils qui prélèvent l’air comburant dans la pièce. Les méthodes mentionnées dans la Partie 2 du présent document sont applicables aux conduits de fumée et aux conduits de raccordement pour appareils de combustion à circuit étanche.

Dimniki - Projektiranje, vgradnja in pregled - 1. del: Dimniki in povezovalni dimovodi za ogrevalne naprave v nezatesnjenih prostorih

Ta evropski standard opisuje metodo določanja meril za projektiranje in vgradnjo dimovodnih sistemov, konstrukcijo obrtniško izdelanih dimnikov in obnovo obstoječih dimnikov. Dokument vsebuje tudi informacije o zagonu dimnikov.
Ta evropski standard obravnava tudi povezovalne dimovode.
Ta evropski standard se ne uporablja za prostostoječe dimnike iz standarda EN 13084-1.
Ta evropski standard izključuje dimnike z oznako H (dimniki z visokim nadtlakom) in dimnike za ogrevalne naprave, neodvisne od zraka v prostoru.
Za namene tega evropskega standarda izraz »vgradnja« vključuje konstrukcijo.

General Information

• Status: Published
• Publication Date: 25-Jul-2023
• ICS: 91.060.40 - Chimneys, shafts, ducts
• Technical Committee: CEN/TC 166 - Chimneys
• Drafting Committee: CEN/TC 166/WG 1 - General requirements
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Jul-2023
• Due Date: 10-Jan-2023
• Completion Date: 26-Jul-2023
• Ref Project: SIST EN 15287-1:2023 - Chimneys - Design, installation and commissioning - Part 1: Chimneys and connecting flue pipes for non-room sealed combustion appliances

Relations

• Replaces: EN 15287-1:2007+A1:2010 - Chimneys - Design, installation and commissioning of chimneys - Part 1: Chimneys for non-roomsealed heating appliances
• Effective Date: 19-Jan-2023

Overview

EN 15287-1:2023 - Chimneys, Design, installation and commissioning (Part 1) - is a CEN European standard that specifies how to design, install, relining and commission system and custom-built chimneys and connecting flue pipes for non‑room sealed combustion appliances. It defines labelling (chimney plate), designation classes (temperature, pressure, condensate/corrosion resistance, sootfire resistance) and the information required for safe, code‑compliant chimney systems. The standard replaces EN 15287-1:2007+A1:2010 and applies within stated geometric limits (support spacing and free‑standing heights).

Key topics and technical requirements

• Scope limits: support spacing not to exceed 4 m; distance above last structural attachment ≤ 3 m; rectangular free‑standing height limited to five times the smallest external dimension.
• Chimney designation classes: temperature, pressure, condensate resistance, corrosion resistance, sootfire resistance and minimum distance to combustible materials.
• Required design information: data from appliances, combustion air supply, building structure, existing chimney condition, and local environmental factors.
• Materials & construction: criteria for system chimneys, custom-built chimneys, liners and connecting flue pipes; material selection based on designation and corrosion/condensate loads.
• Sizing & routing: procedures for chimney and connecting flue pipe sizing, route selection and minimum distances to combustible materials.
• Installation practices: relining methods, accessories, supports, sealing and component handling on site.
• Labelling & documentation: chimney plate content and handover documentation required at commissioning.
• Commissioning & handover: physical and operational checks, testing and handing over the installed chimney to the client.
• Annexes: informative guidance (terminology, data lists, examples for designation, minimum distances, maintenance, flue dampers, terminals).

Practical applications and users

EN 15287-1:2023 is used to ensure safe, durable and compliant chimney systems for non‑room sealed appliances. Typical users include:

• HVAC and chimney designers and engineers specifying chimney systems and flue liners
• Installers and site supervisors responsible for construction, relining and supports
• Manufacturers of chimney components and system chimneys
• Building control authorities, fire safety engineers and inspectors performing commissioning and handover checks
• Maintenance contractors responsible for inspection, cleaning and repair

Practical uses include producing the chimney plate, choosing appropriate materials and designation classes, verifying minimum clearances, and performing commissioning tests.

Related standards

• EN 15287-2 (for room sealed combustion appliances) - methods differ for sealed systems.
• EN 1443 is referenced for correlations with flue liner designations (see informative annexes).

Keywords: EN 15287-1:2023, chimneys, connecting flue pipes, non-room sealed combustion appliances, chimney design, chimney installation, chimney commissioning, chimney relining, chimney plate, chimney safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2023
Nadomešča:
SIST EN 15287-1:2008+A1:2010
Dimniki - Projektiranje, vgradnja in pregled - 1. del: Dimniki in povezovalni
dimovodi za ogrevalne naprave v nezatesnjenih prostorih
Chimneys - Design, installation and commissioning - Part 1: Chimneys and connecting
flue pipes for non-room sealed combustion appliances
Abgasanlagen - Planung, Montage und Abnahme - Teil 1: Senkrechte Teile von
Abgasanlagen und Verbindungsstücke für raumluftabhängige
Verbrennungseinrichtungen
Conduits de fumée - Conception, installation et mise en oeuvre - Partie 1: Conduits de
fumée et conduits de raccordement pour appareils à combustion qui dépendent de l’air
dans la pièce
Ta slovenski standard je istoveten z: EN 15287-1:2023
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15287-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 91.060.40 Supersedes EN 15287-1:2007+A1:2010
English Version
Chimneys - Design, installation and commissioning - Part
1: Chimneys and connecting flue pipes for non-room
sealed combustion appliances
Conduits de fumée - Conception, installation et mise en Abgasanlagen - Planung, Montage und Abnahme - Teil
service - Partie 1: Conduits de fumée et conduits de 1: Senkrechte Teile von Abgasanlagen und
raccordement pour appareils de combustion qui Verbindungsstücke für raumluftabhängige
prélèvent l'air comburant dans la pièce Verbrennungseinrichtungen
This European Standard was approved by CEN on 5 June 2023.

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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15287-1:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Design . 16
4.1 General. 16
4.2 Characteristics . 16
4.2.1 Designation of an installed chimney . 16
4.2.2 Temperature classes. 16
4.2.3 Pressure classes . 17
4.2.4 Condensate resistance classes . 17
4.2.5 Corrosion resistance classes . 18
4.2.6 Sootfire resistance classes . 18
4.2.7 Minimum distance to combustible material . 18
4.3 Required information . 19
4.3.1 Sources of data and information . 19
4.3.2 Local conditions. 19
4.3.3 Combustion appliance information . 19
4.3.4 Combustion air supply . 19
4.3.5 Building structure and chimney route . 19
4.3.6 Existing chimney . 20
4.3.7 Chimney product specification . 20
4.4 Design requirements . 20
4.4.1 General. 20
4.4.2 Route of the chimney and the connecting flue pipe . 20
4.4.3 Designation classes . 22
4.4.4 Materials of construction . 23
4.4.5 Chimney sizing and characteristics . 24
4.4.6 Installation requirements . 24
4.4.7 Accessories . 29
4.5 Chimney plate and additional information . 32
5 Installation . 33
5.1 General. 33
5.2 Construction of relined chimneys . 33
5.3 Chimney plate. 33
6 Commissioning/handover . 34
Annex A (informative) Terminology . 35
Annex B (informative) List of combustion appliance data required for the design of a chimney 38
B.1 For choosing the chimney type (required chimney designation) . 38
B.2 For calculation of the chimney (sizing, see 4.4.5) . 38
B.3 For combustion appliance/connecting flue pipe/chimney adapter design/choice . 38
Annex C (informative) Example of typical building structure designed to assist exchange of
information . 39
Annex D (informative) Location of chimney outlets . 42
Annex E (informative) Correlation between the product designation of metal system chimneys,
liners and connecting flue pipes and the corrosion loads in Member States (MS) . 46
Annex F (informative) Correlation between type of flue liner according to the designation of
parameters for clay/ceramic flue liners, clay/ceramic flue blocks and concrete flue blocks
and the designation according to EN 1443 . 53
Annex G (informative) Example for chimney plates . 55
Annex H (informative) Determination of the chimney designation for custom-built and relined
chimneys . 56
H.1 General . 56
H.2 Temperature class . 56
H.3 Pressure class . 64
H.4 Condensate resistance class . 65
H.5 Corrosion resistance class . 65
H.6 Sootfire resistance class . 65
H.7 Minimum distance to combustible material . 66
Annex I (informative) Example for the determination of the designation of a relined chimney
using a metal flue liner . 67
I.1 Input data for a typical relined chimney . 67
I.2 Temperature class . 68
I.3 Pressure class . 70
I.4 Condensate resistance class . 70
I.5 Corrosion resistance class . 70
I.6 Sootfire resistance class . 70
I.7 Minimum distance to combustible material . 70
I.8 Designation of the relined chimney . 71
I.9 Chimney plate of the relined chimney in this example . 71
Annex J (informative) Example for the determination of the designation of a custom-built
chimney using a clay/ceramic flue liner . 72
J.1 Input data for a custom-built chimney . 72
J.2 Temperature class . 72
J.3 Pressure class . 74
J.4 Condensate resistance class . 74
J.5 Corrosion resistance class . 74
J.6 Sootfire resistance class . 75
J.7 Minimum distance to combustible material . 75
J.8 Designation of the custom-built chimney . 75
J.9 Chimney plate for the custom-built chimney in this example . 75
Annex K (informative) Minimum distances to combustible material . 76
K.1 Connecting flue pipes without designation according to 4.2 . 76
K.2 Access components . 76
K.3 Plastic flue liners in a chimney stack . 77
Annex L (informative) Calculating the temperature of adjacent material . 79
L.1 Example for calculation of the temperature of adjacent material (e.g. weatherproofing) 79
L.2 Example for calculation of the temperature of adjacent materials (e.g. weatherproofing)
............................................................................................................................................................................. 80
Annex M (informative) Useful hints for handling of materials and components on site . 82
M.1 General. 82
M.2 Check of existing chimney . 82
M.3 Checking before installation . 82
M.4 Checking on delivery of materials . 82
M.5 Site handling and storage. 82
M.6 Coordination of work . 83
Annex N (informative) Chimney commissioning . 84
N.1 General. 84
N.2 Physical checks . 84
N.3 Operational checks . 85
Annex O (informative) Recommendations for inspection, cleaning and maintenance . 88
O.1 General. 88
O.2 Inspection and cleaning . 88
O.3 Maintenance . 88
Annex P (informative) Flue damper . 89

P.1 General. 89
P.2 Flue damper types . 90
P.3 Additional information for the use of a flue damper type 2 and 4 . 92
Annex Q (informative) Terminals . 94
Q.1 Terminal types . 94
Q.2 Required information . 94
Bibliography . 96

European foreword
This document (EN 15287-1:2023) 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 2024 and conflicting national standards shall
be withdrawn at the latest by January 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document will supersede EN 15287-1:2007+A1:2010.
This European Standard is part of the series Chimneys — Design, installation and commissioning:
— Part 1: Chimneys and connecting flue pipes for non-room sealed combustion appliances;
— Part 2: Chimneys and connecting flue pipes for room sealed combustion appliances.
In comparison with the previous edition, the following technical modifications have been made:
a) restructuring of the chapters and annexes;
b) harmonization of the text with part 2;
c) updating the content according to EN 1443:2019;
d) adoption of all relevant terms from EN 1443:2019;
e) description of the designation and classes of a chimney according to EN 1443:2019;
f) expanding the specifications for accessories;
g) recommendations for some minimum distances from combustible material;
h) scope now also covers chimneys for medium and high positive pressure.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Türkiye and the United
Kingdom.
Introduction
CEN/TC 166 started with its programme on standardization of chimneys approximately 30 years ago,
with standards for interfaces, for products, for tests and last but not least for design, installation,
construction and commissioning matters.
In the last years, first priority in the work program was given to product and test standards.
In the meantime, most of the product and test standards were published or are nearly ready for
publication. In order to introduce the products in a simple way on the markets of the different Member
States, some common rules for design, installation, and commissioning especially with reference to the
designation of a chimney were considered helpful.
Initially, CEN/TC 166/SC 2 started the work on execution standards for metal chimneys, the first
standard being EN 12391-1 in 2003.
In order not to repeat this work in all material orientated WGs and SCs, CEN/TC 166 decided in 2002 to
give the task to WG 1 to develop a material independent design, installation and commissioning standard.
CEN/TC 166/WG 1 started the work in 2003 and decided first to draft two documents, one for chimneys
connected to non-room sealed combustion appliances and one for chimneys connected to room sealed
combustion appliances.
Application of this document presupposes awareness of applicable legal requirements in the different
CEN Member States and its affiliates. In CEN Member States and its affiliates where no applicable legal
requirements exist, this document provides guidance for the design, installation and commissioning of
chimneys.
NOTE Where “Member States” is mentioned in this document this also includes affiliates.
1 Scope
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 an installed chimney.
This document applies to chimneys which are subject to the following limiting conditions:
— the distance between the supports not to exceed 4 m;
— the distance above the last structural attachment not to exceed 3 m;
— the free-standing height above the uppermost structural support attachment for chimneys with
rectangular cross section is not more than five times the smallest external dimension.
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 document are applicable to chimneys
and connecting flue pipes for room sealed combustion appliances.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1443:2019, Chimneys - General requirements
EN 1457-1, Chimneys - Clay/ceramic flue liners - Part 1: Flue liners operating under dry conditions -
Requirements and test methods
EN 1457-2, Chimneys - Clay/ceramic flue liners - Part 2: Flue liners operating under wet conditions -
Requirements and test methods
EN 1806, Chimneys - Clay/ceramic flue blocks for single wall chimneys - Requirements and test methods
EN 1856-1, Chimneys - Requirements for metal chimneys - Part 1: System chimney products
EN 1856-2, Chimneys - Requirements for metal chimneys - Part 2: Metal flue liners and connecting flue pipes
EN 1857, Chimneys - Components - Concrete flue liners
EN 1858, Chimneys - Components - Concrete flue blocks
EN 12446, Chimneys - Components - Concrete outer wall elements
EN 13063-1, Chimneys - System chimneys with clay/ceramic flue liners - Part 1: Requirements and test
methods for sootfire resistance
EN 13063-2, Chimneys - System chimneys with clay/ceramic flue liners - Part 2: Requirements and test
methods under wet conditions
EN 13069, Chimneys - Clay/ceramic outer walls for system chimneys - Requirements and test methods
EN 13084-1, Free-standing chimneys - Part 1: General requirements
EN 13216-1, Chimneys - Test methods for system chimneys - Part 1: General test methods
EN 13384-1, Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving one
combustion appliance
EN 13384-2, Chimneys - Thermal and fluid dynamic calculation methods - Part 2: Chimneys serving more
than one combustion appliance
EN 13502, Chimneys - Requirements and test methods for clay/ceramic flue terminals
EN 14297, Chimneys - Freeze-thaw resistance test method for chimney products
EN 14471, Chimneys - System chimneys with plastic flue liners - Requirements and test methods
EN 16497-1, Chimneys - Concrete System Chimneys - Part 1: Non-balanced flue applications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1443:2019 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/
NOTE Examples of chimney construction identifying individual component terminology and definitions are
given in Figures A.1, A.2 and A.3 in Annex A.
3.1
fire compartment
part of the building comprising one or more rooms, spaces or storeys constructed to prevent the spread
of fire
3.2
combustion appliance
unit generating products of combustion which need to be conveyed to the outside atmosphere
Note 1 to entry: E.g. heating appliances, cooking appliances, motors, CHPs (en: combined heat power).
[SOURCE: EN 1443:2019, 3.1]
3.3
flue
passage for conveying the products of combustion to the outside atmosphere
[SOURCE: EN 1443:2019, 3.2]
3.4
flue gas
gaseous portion of the products of combustion conveyed in a flue
[SOURCE: EN 1443:2019, 3.3]
3.5
products of combustion
products resulting from the combustion of fuel (gaseous, liquid and solid constituents)
[SOURCE: EN 1443:2019, 3.4]
3.6
chimney
structure consisting of a wall or walls enclosing a flue or flues conveying the products of combustion into
the outside atmosphere
Note 1 to entry: The generic word “chimney”, when used in this document, refers to chimneys used to convey the
products of combustion from any combustion appliance to the outside atmosphere, and thus includes all other
terms of common use, such as: vents, flues, shafts, exhaust systems, flue ducts, etc.
[SOURCE: EN 1443:2019, 3.5]
3.7
chimney stack
chimney enclosing more than one flue
3.8
single-wall chimney
chimney with only one wall
[SOURCE: EN 1443:2019, 3.17]
3.9
multi-wall chimney
chimney consisting of a flue liner and at least one additional wall
[SOURCE: EN 1443:2019, 3.18]
3.10
system chimney
chimney that is installed using a combination of compatible chimney components, obtained or specified
as a kit from one manufacturing source with product responsibility for the whole chimney
[SOURCE: EN 1443:2019, 3.19]
3.11
custom-built chimney
chimney that is installed or built on-site using a combination of compatible components that may be from
one or different sources
[SOURCE: EN 1443:2019, 3.20]
3.12
relining
process of renovating or replacing the flue liner of a chimney
[SOURCE: EN 1443:2019, 3.21]
3.13
flue liner
rigid or flexible inner wall of a chimney consisting of components the inner surface of which is in contact
with products of combustion
[SOURCE: EN 1443:2019, 3.6, modified — Replaced “surface” with “inner surface”.]
3.14
flue liner kit
flue liner that is installed using a combination of compatible flue liner components, obtained or specified
as a kit from one manufacturing source with product responsibility for the whole flue liner including all
its components
Note 1 to entry: A flue liner kit is not considered a system chimney.
[SOURCE: EN 1443:2019, 3.7]
3.15
rigid flue liner
flue liner that cannot bend without permanent deformation
3.16
flexible flue liner
tube having a single or multi-skin construction that is able to bend in any direction without permanent
deformation
3.17
outer wall
external wall of a chimney, on the outer surface of which the minimum distance to combustible material
is referred
[SOURCE: EN 1443:2019, 3.22, modified — Replaced “from the surface of which the distance to
combustible is measured” with “, on the outer surface of which the minimum distance to combustible is
referred”.]
3.18
enclosure
additional structure, combustible or non-combustible, built around a chimney
Note 1 to entry: An enclosure which is specified as a part of the chimney is considered an “outer wall” of the
chimney.
Note 2 to entry: Enclosures can for example give additional safety in case of fire, provide additional heat transfer
resistance, prevent accidental human contact, prevent impact damage and can be used for decorative purposes.
[SOURCE: EN 1443:2019, 3.23]
3.19
mid feather wall
dividing wall separating multiple flues within a chimney stack
3.20
flue block
factory-made single- or multi-wall chimney component with one or more flues
[SOURCE: EN 1443:2019, 3.24]
3.21
connecting flue pipe
component or components connecting the combustion appliance outlet and the chimney
[SOURCE: EN 1443:2019, 3.8]
3.22
component
any part of a chimney, of a flue liner or of a connecting flue pipe
[SOURCE: EN 1443:2019, 3.9]
3.23
section
straight chimney component of a flue liner or of a connecting flue pipe, conveying products of combustion
[SOURCE: EN 1443:2019, 3.10]
3.24
joint
connection between two components
[SOURCE: EN 1443:2019, 3.15]
3.25
seal
prefabricated element that joins two components in such a way as to fulfil leakage requirements
[SOURCE: EN 14241-1:2013, 3.7, modified — Replaced “prevent leakage” by “fulfil leakage
requirements”.]
3.26
sealant
material which, applied in an unformed state to a joint, seals it by adhering to appropriate surfaces within
the joint in such a way as to fulfil leakage requirements
3.27
fitting
component of a chimney, of a flue liner or of a connecting flue pipe conveying products of combustion
except a section
[SOURCE: EN 1443:2019, 3.11]
3.28
elbow/bend
chimney fitting which provides a change of direction of the flue
3.29
T-piece
chimney fitting which allows a combustion appliance, connecting flue pipe or accessory to be connected
to the chimney flue at an angle
3.30
access component
component installed in the chimney or in the connecting flue pipe to provide access to the flue for the
purpose of inspection or cleaning
Note 1 to entry: An access component can be a part of a system chimney, flue liner or connecting flue pipe or can
be an accessory.
3.31
back ventilation
ventilation of the space between two walls of the chimney or the chimney and an enclosure
3.32
centralising spacer
component to centralize the flue liner
3.33
support
component of a chimney, a flue liner or a connecting flue pipe used to fix, or transfer the load of
components to structural elements
Note 1 to entry: Structural elements can be a building, a mast, etc.
[SOURCE: EN 1443:2019, 3.13]
3.34
sleeve
component which provides an aperture through a wall, floor or roof through which a chimney or a
connecting flue pipe pass
3.35
flashing
prefabricated component or site fabricated materials used for weatherproofing the penetration of the
roof by the chimney
3.36
fire stop
component intended to provide fire resistance to fire spread between rooms or compartments
3.37
chimney adapter
component which connects the chimney to the connecting flue pipe or a combustion appliance
3.38
combustion appliance adapter
component which connects the connecting flue pipe or the chimney to a combustion appliance
3.39
test point
component that provides access for flue gas sampling and measurement
3.40
accessory
additional flue gas carrying component added to a chimney or a connecting flue pipe to perform a
particular function
[SOURCE: EN 1443:2019, 3.12]
3.41
draught regulator
device with a flap in a flue opening to allow entry of secondary air into the flue to regulate the draught
Note 1 to entry: A draught regulator can be a part of a chimney, flue liner or connecting flue pipe or can be an
accessory.
3.42
standstill opening devices
device which is opened by a motor to allow air to enter the flue during the standstill period of the
combustion appliance
Note 1 to entry: A stand still opening device can be a part of a chimney, flue liner or connecting flue pipe or can be
an accessory.
3.43
combined secondary air device
combination of a draught regulator and standstill opening device
Note 1 to entry: A combined secondary air device can be a part of a chimney, flue liner or connecting flue pipe or
can be an accessory.
3.44
explosion relief
device that protects the chimney against overpressure arising from deflagration or explosion in the flue
3.45
silencer
product used in connecting flue pipes or on top of chimney for reducing noise emission caused by
combustion appliances including emergency generators or fans
Note 1 to entry: A silencer can be a part of a chimney, flue liner or connecting flue pipe or can be an accessory.
3.46
condensate drain
component to facilitate the disposal of condensate
3.47
flue damper
device used to close or partially close the flue
Note 1 to entry: A flue damper can be a part of a chimney, flue liner or connecting flue pipe or can be an accessory.
3.48
terminal
component installed at the outlet of a chimney or a flue liner
Note 1 to entry: There are terminals only for decorative purposes or terminals intended for specified
performances.
[SOURCE: EN 1443:2019, 3.14]
3.49
rain cap
part of the chimney that protects against the entry of rain
Note 1 to entry: A rain cap can be a part of a system chimney, flue liner or terminal or can be an accessory.
3.50
chimney fan
fan positioned on the outlet of the chimney (exhaust fan) or fan positioned in the connecting flue pipe
(inline fan)
3.51
nominal working temperature
flue gas temperature under normal operating conditions of the combustion appliance at maximum heat
input as specified in the appliance product standards
[SOURCE: EN 1443:2019, 3.25]
3.52
negative pressure chimney
chimney designed to operate with the pressure inside the flue equal or less than the pressure outside the
flue
Note 1 to entry: The class for negative pressure is “N”.
[SOURCE: EN 1443:2019, 3.26]
3.53
positive pressure chimney
chimney designed to operate with the pressure inside the flue greater than the pressure outside the flue
Note 1 to entry: Classes for positive pressure are e.g. “P”, “M”, “H”.
[SOURCE: EN 1443:2019, 3.27]
3.54
condensate
liquid products formed when the flue gas is below the water dew point
[SOURCE: EN 1443:2019, 3.28]
3.55
dry operating condition
condition when the chimney is designed to operate normally with the temperature of the inner surface
of the flue liner at or above the water dew point
Note 1 to entry: Dry operating condition is designated “D”.
[SOURCE: EN 1443:2019, 3.29]
3.56
wet operating condition
condition when the chimney is designed to operate normally with the temperature of the inner surface
of the flue liner below the water dew point
Note 1 to entry: Wet operating condition is designated “W”.
Note 2 to entry: The characteristic “W” is not related to rainwater ingress.
[SOURCE: EN 1443:2019, 3.30]
3.57
sootfire
combustion of the flammable residue deposited on the flue liner or connecting flue pipe
[SOURCE: EN 1443:2019, 3.31]
3.58
sootfire resistant chimney
chimney that is resistant to sootfire and is reusable after
Note 1 to entry: Sootfire resistant chimneys are designated “G”.
[SOURCE: EN 1443:2019, 3.32]
3.59
sootfire safe accessory
accessory that may not perform its intended function during and after a sootfire but does not prevent the
safe operation or change the designation “G” of the chimney or connecting flue pipe
Note 1 to entry: Sootfire safe accessories are designated “As”.
Note 2 to entry: “As” is used only for accessories and not for chimneys, flue liners and connecting flue pipes.
Note 3 to entry: Sootfire safe accessories are considered as replaceable without dismantling the chimney.
Note 4 to entry: Measures to be taken after the event of a sootfire are to be found in the relevant product standard.
[SOURCE: EN 1443:2019, 3.33]
3.60
minimum distance to combustible material
minimum distance of the outer wall of the chimney to combustible material
Note 1 to entry: The minimum distance to combustible is designated with “xx”.
[SOURCE: EN 1443:2019, 3.34, modified — Replaced “distance” with “minimum distance”.]
3.61
fire resistance external to external
ability of the chimney to prevent the spread of fire from one compartment to another
[SOURCE: EN 1443:2019, 3.35, modified – Deleted the note.]
3.62
thermal resistance of a chimney
resistance to heat transfer through the wall or walls of the chimney
Note 1 to entry: The thermal resistance of a chimney is given as “(1/Λ)”.
[SOURCE: EN 1443:2019, 3.36]
3.63
flow resistance
pressure loss in a flue or in a combustion air supply duct opposed to the flow of the flue gas or combustion
air in motion at a given temperature and velocity
[SOURCE: EN 1443:2019, 3.37]
3.64
coefficient of flow resistance
ratio between the flow resistance of a fitting and the dynamic pressure of the medium due to a directional
and/or cross-sectional change in the fitting
[SOURCE: EN 1443:2019, 3.38]
3.65
freeze-thaw resistant chimney
chimney that is capable of withstanding freeze-thaw exposure
[SOURCE: EN 1443:2019, 3.39]
4 Design
4.1 General
In order to design a chimney, the following steps should be followed to achieve a safe chimney.
4.2 Characteristics
4.2.1 Designation of an installed chimney
In order to identify the characteristics of the chimney the installed chimney shall be designated.
The designation shall include information on the temperature class, the pressure class, the condensate
resistance class, the corrosion resistance class and the sootfire resistance class and where appropriate
the minimum distance to combustible material.
The meaning of the listed characteristics corresponds to the product characteristics of system chimneys
and components for chimneys such as flue liners, connecting flue pipes and accessories.
EXAMPLE For a designation of an installed chimney:

4.2.2 Temperature classes
Temperature classes under normal operating conditions are given in Table 1.
Table 1 — Temperature classes
Temperature class Nominal working temperature
°C
T 080 ≤ 80
T 100 ≤ 100
T 120 ≤ 120
T 140 ≤ 140
T 160 ≤ 160
T 200 ≤ 200
T 250 ≤ 250
T 300 ≤ 300
T 400 ≤ 400
T 450 ≤ 450
T 600 ≤ 600
4.2.3 Pressure classes
Pressure classes are given in Table 2 (value for a gas tightness determined by a threshold leakage rate
appropriate to the pressure class).
Table 2 — Pressure classes
a
Pressure Pressure Type of use Leakage
class Pa rate
−1 −2
l · s · m
N 1 ≤ 0 for negative pressure chimneys ≤ 2,0
N 2 ≤ 0 for negative pressure chimneys ≤ 3,0
P 1 ≤ 200 for low positive pressure chimneys ≤ 0,006
P 2 ≤ 200 for low positive pressure chimneys ≤ 0,120
M 1 ≤ 1 500 for medium positive pressure chimneys ≤ 0,006
M 2 ≤ 1 500 for medium positive pressure chimneys ≤ 0,120
H 1 ≤ 5 000 for high positive pressure chimneys ≤ 0,006
H 2 ≤ 5 000 for high positive pressure chimneys ≤ 0,120
a
Pressure at steady-state condition under normal operating conditions.
4.2.4 Condensate resistance classes
Condensate resistance classes are:
— D for chimneys, flue liners, connecting flue pipes, components and accessories operating under dry
conditions;
— W for chimneys, flue liners, connecting flue pipes, components and accessories operating under wet
conditions.
4.2.5 Corrosion resistance classes
Corrosion resistance classes are given in Table 3.
Table 3 — Corrosion resistance classes
Corrosion
resistance Gaseous fuels Liquid fuels Solid fuels
class
1 − gas: – –
sulfur-
content ≤ 50 mg/m
− LNG
− LPG
2 − gas: − oil: − chemically
untreated wood
sulfur- sulfur-
and
content ≤ 2 000 mg/m content ≤ 2 000 mg/kg
chemically
− LNG − kerosene
untreated woody
− LPG
a
biomass
3 − gas − oil − wood
− LNG − kerosene − coal
− LPG − peat
NOTE Table 3 does not categorize process gases or liquids.
a
Natural wood and biomass from natural wood are considered as chemically untreated.
4.2.6 Sootfire resistance classes
Sootfire resistance classes are:
— O for chimneys, flue liners, connecting
...