oSIST prEN 1856-1:2021
(Main)Chimneys - Requirements for metal chimneys - Part 1: System chimney products
Chimneys - Requirements for metal chimneys - Part 1: System chimney products
This European Standard specifies the performance requirements for single and multi-wall system chimney products with rigid metallic
liners (chimney sections, chimney fittings and terminals, including supports) with nominal diameter up to and including 1200 mm, used
to convey the products of combustion from appliances to the outside atmosphere. It also specifies the requirements for marking,
manufacturer's instructions, product information and evaluation of conformity. Metal liners and metal connecting flue pipes not covered
here are included in EN 1856-2:2009. This European Standard does not apply to structurally independent (free standing or self-supporting) chimneys.
Abgasanlagen - Anforderungen an Metall-Abgasanlagen - Teil 1: Bauteile für System-Abgasanlagen
Dieses Dokument legt die Leistungsmerkmale für Bauteile für ein- und mehrschalige System-Abgasanlagen mit starren Metallinnenrohren (Abschnitte der Abgasanlagen, Formstücke und Aufsätze, einschließlich der Stützen) mit einem Nenndurchmesser von 1 200 mm fest, die zur Ableitung von Verbrennungsprodukten von Feuerstätten an die Außenluft verwendet werden.
Dieses Dokument legt zudem die Eigenschaften der Zuluftschächte von konzentrischen Abgasanlagen für raumluftunabhängige Anwendungen fest. Darüber hinaus werden die Eigenschaften für die Kennzeichnung, die Herstellerangaben, die Produktinformationen sowie die Bewertung und Überprüfung der Leistungs¬konstanz (AVCP, en:assessment and verification of constancy of performance) festgelegt. Innenrohre und Verbindungsstücke aus Metall, die in dieser Norm nicht behandelt werden, sind in prEN 1856 2:2019 angegeben.
Dieses Dokument gilt nicht für Abgasanlagen (freistehend oder selbststützend), die von der Trag-konstruktion unabhängig errichtet werden können.
Conduits de fumée - Prescriptions pour les conduits de fumée métalliques - Partie 1 : Composants de systèmes de conduits de fumée
Le présent document spécifie les caractéristiques de performance des systèmes de conduits de fumée avec conduits intérieurs métalliques rigides simple ou multi-parois (éléments droits, éléments de conduit de fumée et terminaux, y compris les supports) d'un diamètre nominal jusqu'à 1 200 mm inclus, utilisés pour évacuer les produits de combustion des appareils jusqu'à l'atmosphère extérieure.
Ce document spécifie aussi les caractéristiques des conduits d'alimentation en air des conduits de fumée concentriques pour les applications à circuit étanche. De plus, il spécifie les caractéristiques de marquage, les instructions du fabricant, les informations relatives au produit ainsi que l'évaluation et la vérification de la constance des performances (EVCP). Les tubages et éléments de raccordement métalliques qui ne sont pas traités ici font l'objet du prEN 1856 2:2019.
Le présent document ne s'applique pas aux conduits de fumée structurellement indépendants (autoporteurs ou autonomes).
Dimovodne naprave - Zahteve za kovinske dimovodne naprave - 1. del: Proizvodi za sistemske dimovodne naprave
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2021
Dimovodne naprave - Zahteve za kovinske dimovodne naprave - 1. del: Proizvodi
za sistemske dimovodne naprave
Chimneys - Requirements for metal chimneys - Part 1: System chimney products
Abgasanlagen - Anforderungen an Metall-Abgasanlagen - Teil 1: Bauteile für System-
Abgasanlagen
Conduits de fumée - Prescriptions pour les conduits de fumée métalliques - Partie 1 :
Composants de systèmes de conduits de fumée
Ta slovenski standard je istoveten z: prEN 1856-1
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 91.060.40 Will supersede EN 14989-1:2007, EN 14989-2:2007,
EN 1856-1:2009, EN 1859:2009+A1:2013
English Version
Chimneys - Requirements for metal chimneys - Part 1:
System chimney products
Conduits de fumée - Prescriptions pour les conduits de Abgasanlagen - Anforderungen an Metall-
fumée métalliques - Partie 1 : Composants de systèmes Abgasanlagen - Teil 1: Bauteile für System-
de conduits de fumée Abgasanlagen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 166.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1856-1:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Product characteristics . 13
4.1 Mechanical resistance and stability . 13
4.1.1 Compressive strength . 13
4.1.2 Tensile strength . 13
4.1.3 Lateral strength . 13
4.2 Reaction to fire . 14
4.3 Resistance to fire . 14
4.3.1 Resistance to fire (external to external) . 14
4.3.2 Sootfire resistance (internal to external) . 14
4.4 Hygiene, health and environment, gas tightness . 15
4.5 Safety in use. 16
4.5.1 Thermal resistance . 16
4.5.2 Condensate resistance . 16
4.5.3 Flow resistance of the chimney, fittings and terminals . 16
4.6 Durability . 17
4.6.1 Durability of the flue liner against corrosion . 17
4.6.2 Freeze–thaw resistance . 18
4.7 Specific characteristics for concentric and multi-served chimneys and their
terminals and for balanced flue terminals connected to a separate single chimney
and air supply duct . 18
4.7.1 Specific characteristics for both chimneys and terminals . 18
4.7.2 Flow resistance for the air supply ducts and for the air supply fittings of the
concentric chimney . 19
4.7.3 Specific characteristics for terminals . 19
5 Testing, assessment and sampling methods specific to metal chimneys . 20
5.1 General . 20
5.2 Compressive strength . 20
5.2.1 Sections and Fittings . 20
5.2.2 Chimney support . 21
5.3 Tensile strength . 24
5.3.1 Test assembly . 24
5.3.2 Test procedure and results. 24
5.4 Lateral strength . 26
5.4.1 Fittings in non-vertical orientation . 26
5.4.2 Wind load resistance test . 26
5.5 Thermal performance test . 27
5.5.1 General . 27
5.5.2 Test structure . 28
5.5.3 Test chimney . 28
5.5.4 Vibration conditioning . 29
5.6 Gas tightness . 29
5.7 Condensate resistance . 29
5.7.1 General . 29
5.7.2 Condensate penetration (liquid phase) . 29
5.7.3 Condensate resistance (vapour phase) . 29
5.8 Corrosion resistance test . 30
5.8.1 General . 30
5.8.2 Uniform corrosion . 30
5.8.3 Pitting corrosion and mean pitting corrosion. 30
5.8.4 Corrosion under high temperature conditions (Intergranular corrosion) . 30
5.9 Flow resistance for terminals . 31
5.9.1 Flow resistance test for terminals types I and II . 31
5.9.2 Flow resistance test for terminals type III . 32
5.10 Flow resistance test for air supply ducts or for the air supply fittings of the
concentric chimneys . 39
5.10.1 General . 39
5.10.2 Test results for concentric ducts . 41
5.10.3 Test results for concentric fittings . 41
5.10.4 Rainwater resistance test . 42
5.11 Compressive strength of terminals . 42
5.11.1 Test assembly . 42
5.11.2 Procedure . 42
5.11.3 Test results . 42
5.12 Thermal resistance for the air intake of the chimney and terminal . 42
5.12.1 Procedure . 42
5.12.2 Calculation of the thermal resistance of the flue duct . 43
5.12.3 Calculation of the thermal resistance of the air supply duct . 47
6 Assessment and verification of constancy of performance – AVCP . 49
6.1 General . 49
6.2 Type testing . 49
6.2.1 General . 49
6.2.2 Test samples, testing and compliance criteria . 50
6.2.3 Test reports . 53
6.2.4 Shared other party results . 53
6.2.5 Cascading determination of the product type results . 54
6.3 Factory production control (FPC) . 55
6.3.1 General . 55
6.3.2 Characteristics . 56
6.3.3 Product specific characteristics . 58
6.3.4 Initial inspection of factory and of FPC . 58
6.3.5 Continuous surveillance of FPC . 59
6.3.6 Procedure for modifications . 59
6.3.7 One-off components, pre-production products (e.g. prototypes) and components
produced in very low quantity . 59
7 Designation and product information . 60
7.1 Designation system . 60
7.2 Other information . 60
7.2.1 General . 60
7.2.2 For chimneys . 60
7.2.3 For terminals . 61
8 Marking, labelling and packaging . 61
8.1 Flue gases carrying components . 61
8.2 Chimney plate . 61
Annex A (normative) Corrosion test. 62
A.1 Sampling and preconditioning . 62
A.1.1 Corrosion under exposure to flue gas . 62
A.1.2 Corrosion under high temperature conditions . 62
A.2 Test methods . 62
A.2.1 Test sample . 62
A.2.1.1 General . 62
A.2.1.2 Preparation of test sample . 63
A.2.2 Test room and test equipment . 63
A.2.3 Test procedure . 63
A.2.3.1 Installation . 63
A.2.3.2 Cycling condensate load . 64
A.2.4 Monitoring . 65
A.3 Evaluation . 65
A.3.1 General . 65
A.3.2 Uniform corrosion . 65
A.3.3 Pitting corrosion . 66
A.3.4 Mean pitting corrosion . 66
A.3.5 Intergranular corrosion . 66
A.4 Test report . 67
Annex B (normative) Sampling for factory production control . 72
B.1 Incoming material . 72
B.1.1 Sampling plans . 72
B.1.2 Acceptable quality level (AQL) . 72
B.1.3 Normal, tightened or reduced inspection . 72
B.1.4 Single, double, multiple or sequential sampling. 72
B.1.5 Batch quantity . 72
B.1.6 The inspection level . 72
B.2 In-process inspection . 73
B.2.1 All dimensional aspects . 73
B.2.2 Joint leakage tests . 73
B.2.3 Insulation weight checks . 73
B.2.4 Volume and density checks . 73
B.2.5 Finished goods checks . 73
Annex C (normative) Factory production control scheme . 74
C.1 General . 74
C.2 Insulation material . 74
C.3 Metals, including coatings . 74
C.4 Supports . 74
C.5 Seals and sealants . 74
C.6 Manufacturing checks . 75
C.6.1 Dimensions . 75
C.6.2 Other checks . 75
Annex D (normative) Method for applying an evenly distributed load (horizontal) . 76
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No. 305/2011 . 77
ZA.1 Scope and relevant characteristics . 77
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 81
ZA.3 Assignment of AVCP tasks . 81
Bibliography . 84
European foreword
This document (prEN 1856-1:2021) has been prepared by Technical Committee CEN/TC 166
“Chimneys”, the secretariat of which is held by ASI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1856-1:2009, EN 1859:2009+A1:2013, EN 14989-1:2007 and
EN 14989-2:2007.
The main changes to EN 1856-1:2009 are:
— adoption of the template for harmonized standards under the EU Construction Products Regulation
(305/2011/EU) meaning a clearer definition of the Scope, rewording in Clause 4 “Product
characteristics”, Clause 5 “Testing, assessment and sampling methods” and Clause 7 “Product
classification and designation”, and adoption of the template for Clause 6 “Assessment and
verification of constancy of performance”;
— the main test references are made to EN 13216-1:2019 and the metal chimney specific tests of
EN 1859:2009+A1:2013, and the terminal specific tests of EN 14989-1:2007 and EN 14989-2:2007
have been incorporated into this document;
— adoption of a new revised Annex A “Corrosion tests”. The material table with minimum material
specification of the former edition has been taken over;
— deletion of Annex E, as reference is made to the calculation method of EN 13384-1:2015+A1:2019,
Annex A throughout the document.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Regulation(s).
For relationship with EU Regulation(s), see informative Annex ZA, which is an integral part of this
document.
1 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 room-
sealed 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.
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 573-3:2013, Aluminium and aluminium alloys - Chemical composition and form of wrought products -
Part 3: Chemical composition and form of products
EN 1443:2019, Chimneys - General requirements
EN 1366-13:2019, Fire resistance tests for service installations - Part 13: Chimneys
EN 10088-1:2014, Stainless steels - Part 1: List of stainless steels
EN 13216-1:2019, Chimneys - Test methods for system chimneys - Part 1: General test methods
EN 13384-1:2015+A1:2019, Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys
serving one combustion appliance
EN 13501-1:2018, Fire classification of construction products and building elements - Part 1: Classification
using data from reaction to fire tests
EN 14241-1:2013, Chimneys - Elastomeric seals and elastomeric sealants - Material requirements and test
methods - Part 1: Seals in flue liners
EN 14471:2013+A1:2015, Chimneys - System chimneys with plastic flue liners - Requirements and test
methods
EN 60068-2-57:2013, Environmental testing - Part 2-57: Tests - Test Ff: Vibration - Time-history and sine-
beat method (IEC 60068-2-57:2013)
EN ISO 3651-2:1998, Determination of resistance to intergranular corrosion of stainless steels - Part 2:
Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing
sulfuric acid (ISO 3651-2:1998)
1)
ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed
by acceptance quality limit (AQL) for lot-by-lot inspection
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 terminological 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
3.1
appliance outlet
position where the products of combustion exit from the appliance
3.2
balanced flue terminal
terminal where the air entry to the combustion air supply duct is adjacent to the discharge of combustion
products from the flue
Note 1 to entry: The inlet and outlet being so positioned that wind effects are substantially balanced.
[SOURCE: CEN/TS 16134:2011, 3.11]
3.3
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]
3.4
chimney component
any part of a chimney, of a flue liner or of a connecting flue pipe
3.5
chimney designation
shortened description of a specific chimney type, which clearly distinguishes it from any other types
3.6
chimney fitting
component of a chimney, of a flue liner or of a connecting flue pipe conveying products of combustion
except a section
1)
This document is impacted by the amendment ISO 2859-1:1999/AMD 1:2011 and the corrigendum ISO 2859-
1:1999/COR 1:2001.
3.7
chimney section
straight chimney component of a flue liner or of a connecting flue pipe, conveying products of combustion
3.8
cladding
additional non-structural outer wall around a chimney for protection against heat transfer or weathering,
or for decorative purposes
3.9
concentric chimney
flue duct fully surrounded by the air supply duct
3.10
connecting flue pipe
component or components connecting the heating appliance outlet and the chimney
[SOURCE: EN 1443:2019, 3.8]
3.11
corrosion load
combination of condensate and corrosion resistance classes necessary for the different operating
conditions and types of fuel
3.12
custom built chimney
chimney that is installed or built on-site using a combination of compatible chimney components that
may be from one or different sources
[SOURCE: EN 1443:2019, 3.20]
3.13
design load
load which a chimney or its components are designed to be subjected to, under normal operating
conditions, when installed as per manufacturer's installation instruction
3.14
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]
3.15
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]
3.16
external installation
part of a chimney, which is located outside the building
3.17
firestops
chimney component to prevent the spread of fire
3.18
flexible pipe
metal liner, or metal connecting flue pipe having a single or double skin construction, designed to bend
in any direction without permanent deformation
Note 1 to entry: For the purpose of Annex A (Corrosion test).
3.19
flue
passage for conveying the products of combustion to the outside atmosphere
[SOURCE: EN 1443:2019, 3.2]
3.20
flue gas
gaseous portion of the products of combustion conveyed in a flue
[SOURCE: EN 1443:2019, 3.3]
3.21
metal flue liner
inner wall of a chimney consisting of components the surface of which is in contact with products of
combustion
3.22
combustion appliances
unit generating products of combustion which need to be conveyed to the outside atmosphere
EXAMPLE Heating appliances, cooking appliances, motors, CHPs (Combined Heat and Power).
3.23
insulation
material or air gap between the flue liner and the outer wall, designed to increase thermal resistance of
the chimney
3.24
internal installation
part of a chimney which is located inside a building
3.25
joint
connection between two components
[SOURCE: EN 1443:2019, 3.15]
3.26
installation instructions
written product information that outlines the installation procedure which is provided to the user
3.27
minimum declared wall thickness
value declared for the minimum thickness, after manufacturing of the walls
3.28
multi-wall chimney
chimney consisting of a flue liner and at least one additional wall
[SOURCE: EN 1443:2019, 3.18]
3.29
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]
3.30
nominal size
whole number representing the value of the internal diameter of the flue liner, expressed in millimetres
3.31
non enclosed chimney
chimney which is installed without any enclosure or cladding
3.32
outer wall
external wall of a chimney from the surface of which the distance to combustible material is measured
3.33
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]
3.34
resistance to fire
ability of a chimney to prevent ignition of adjacent combustible material, and to prevent the spread of fire
to adjacent areas
3.35
single-wall chimney
chimney with only one wall
[SOURCE: EN 1443:2019, 3.17]
3.36
sootfire
combustion of the flammable residue deposited on the flue liner
[SOURCE: EN 1443:2019, 3.31]
3.37
structurally independent chimney
chimney which is not attached to buildings, masts or other support structure
3.38
support
chimney component used to fix, or transfer the load of, chimney components to structural elements
(building, mast, etc.)
3.39
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]
3.40
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]
3.41
test assembly
complete assembly of all parts necessary to enable the specific performance criteria to be assessed,
comprising test chimney, test structures, and measuring equipment
3.42
test chimney
assembly of the chimney components (as specified in the test method), necessary to the assessment of a
specific performance criteria of a metal system chimney product
3.43
test structure
assembly of the additional materials (non-chimney components) to enable the test chimney to be
assessed for the specific performance criteria
3.44
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]
3.45
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]
3.46
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, 3.2.5]
3.47
multi-served chimney
chimney serving several heating appliances located on different floors and/or compartments of a
building and individually connected to the chimney
Note 1 to entry: For room-sealed appliances the air supply can be concentric or by means of a separate air supply
duct.
4 Product characteristics
4.1 Mechanical resistance and stability
4.1.1 Compressive strength
4.1.1.1 Chimney sections and fittings
The compressive strength of chimney sections and fittings shall be tested according to the test method
described in 5.2.1, and shall be expressed in kg of chimney or preferably equivalent meters of sections
length.
4.1.1.2 Chimney supports
The compressive strength of chimney supports shall be tested according to the test method described in
5.2.2, and shall be expressed in kg of chimney or preferably equivalent meters of sections length.
4.1.2 Tensile strength
The tensile strength of chimney sections and fittings shall be tested according to the test method
described in 5.3, and shall be expressed in kg of chimney or preferably equivalent meters of sections
length.
4.1.3 Lateral strength
4.1.3.1 Non-vertical installation
The non-vertical installation of chimney sections and fittings shall be tested according to the test method
described in 5.4.1, and expressed as maximum length between the supports.
4.1.3.2 Wind load resistance
The resistance to wind load of chimney sections and fittings shall be tested according to the test method
described in 5.4.2, and expressed as maximum distance between the supports and maximum
freestanding length in m.
4.2 Reaction to fire
The reaction to fire shall be declared. Classification may be carried out via testing according to the
relevant product standard and in accordance with EN 13501-1:2018.
Metal liners, chimneys and terminals shall be classified A1 without testing.
NOTE More information is available in Commission Decision [96/603/EC (2)].
Classification of other materials, i.e. thermal insulation, plastic air supply duct, shall be assessed via
testing according to the relevant product standard and in accordance with EN 13501-1:2018.
4.3 Resistance to fire
4.3.1 Resistance to fire (external to external)
The resistance to an external fire (fire spreading from one compartment to another) shall be tested
according to EN 1366-13:2019 and the results expressed in minutes also stating the test conditions
(horizontal, vertical, open, closed).
4.3.2 Sootfire resistance (internal to external)
4.3.2.1 General
Sootfire resistance shall be tested as described in 4.3.2.3 and 4.3.2.4, depending on the designated classes
and expressed as described in 4.3.2.2.
4.3.2.2 Sootfire resistance classes
Sootfire resistance classes are:
— G for chimneys, and components with sootfire resistance;
— O for chimneys, and components without sootfire resistance;
The sootfire resistance expressed as G or O as described above shall be followed by the distance to
combustible materials (xx) expressed in mm.
4.3.2.3 Sootfire resistance
The sootfire resistance shall be tested according to the test method described in 5.5 and shall be
expressed as described in 4.3.2.2.
4.3.2.4 Thermal performance under normal operating conditions
The thermal performance under normal operating conditions (performed for G and O designated
chimneys) shall be tested according to the test method described in 5.5 and shall be expressed as
described in 4.3.2.2, with the addition of the temperature classes according to Table 1.
Table 1 — Temperature classes and test temperatures
Temperature class Nominal working Flue gas test temperature
temperature (T)
°C
°C
T 080 ≤ 80 100
T 100 ≤ 100 120
T 120 ≤ 120 150
T 140 ≤ 140 170
T 160 ≤ 160 190
T 200 ≤ 200 250
T 250 ≤ 250 300
T 300 ≤ 300 350
T 400 ≤ 400 500
T 450 ≤ 450 550
T 600 ≤ 600 700
4.4 Hygiene, health and environment, gas tightness
The gas tightness of chimneys and terminals shall be tested according to 5.6 and expressed as a pressure
class according to Table 2.
Table 2 — Pressure class
a
Pressure Type of use Test pressure Leakage rate
Pressure
−1 −2
Class Pa
Pa l · s · m
N 1 ≤ 0 for negative pressure chimneys 40 ≤ 2,0
N 2 ≤ 0 for negative pressure chimneys 20 ≤ 3,0
P 1 ≤ 200 for low positive pressure chimneys 200 ≤ 0,006
P 2 ≤ 200 for low positive pressure chimneys 200 ≤ 0,120
for medium positive pressure
M 1 ≤ 1 500 1 500 ≤ 0,006
chimneys
for medium positive pressure
M 2 ≤ 1 500 1 500 ≤ 0,120
chimneys
H 1 ≤ 5 000 for high positive pressure chimneys 5 000 ≤ 0,006
H 2 ≤ 5 000 for high positive pressure chimneys 5 000 ≤ 0,120
a
Pressure at steady-state condition under normal operating conditions.
4.5 Safety in use
4.5.1 Therm
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