SIST EN 13384-1:2015+A1:2019

SLOVENSKI STANDARD
SIST EN 13384-1:2015+A1:2019
01-september-2019
Nadomešča:
SIST EN 13384-1:2015
Dimniki - Računske metode termodinamike in dinamike fluidov - 1. del: Dimniki za
eno ogrevalno napravo
Chimneys - Thermal and fluid dynamic calculation methods - Part 1: Chimneys serving
one heating appliance
Abgasanlagen - Wärme- und strömungstechnische Berechnungsverfahren - Teil 1:
Abgasanlagen mit einer Feuerstätte
Conduits de fumée - Méthodes de calcul thermo-aéraulique - Partie 1: Conduits de
fumée ne desservant qu'un seul appareil
Ta slovenski standard je istoveten z: EN 13384-1:2015+A1:2019
ICS:
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
SIST EN 13384-1:2015+A1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13384-1:2015+A1:2019

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SIST EN 13384-1:2015+A1:2019


EN 13384-1:2015+A1
EUROPEAN STANDARD

NORME EUROPÉENNE

July 2019
EUROPÄISCHE NORM
ICS 91.060.40 Supersedes EN 13384-1:2015
English Version

Chimneys - Thermal and fluid dynamic calculation
methods - Part 1: Chimneys serving one heating appliance
Conduits de fumée - Méthodes de calcul thermo- Abgasanlagen - Wärme- und strömungstechnische
aéraulique - Partie 1: Conduits de fumée ne desservant Berechnungsverfahren - Teil 1: Abgasanlagen mit einer
qu'un seul appareil Feuerstätte
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, 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 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13384-1:2015+A1:2019 E
worldwide for CEN national Members.

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
Contents Page
European foreword . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and abbreviations . 12
5 Calculation method for non-balanced flue chimneys . 17
5.1 General principles . 17
5.2 Pressure requirements . 17
5.2.1 Negative pressure chimneys . 17
5.2.2 Positive pressure chimneys. 18
5.3 Temperature requirement . 19
5.4 Calculation procedure . 19
5.5 Flue gas data characterising the !combustion"appliance . 20
5.5.1 General . 20
5.5.2 !Flue gas mass flow and combustion air mass flow . 20
5.5.3 Flue gas temperature . 21
5.5.4 Minimum draught for the !combustion" appliance (PW) for negative pressure
chimney . 22
5.5.5 Maximum draught for the !combustion" appliance (P ) for negative
Wmax
pressure chimney . 23
5.5.6 Maximum differential pressure of the !combustion" appliance (P ) for
WO
positive pressure chimney . 23
5.5.7 Minimum differential pressure of the !combustion" appliance (P ) for
WOmin
positive pressure chimney . 23
5.6 Characteristic data for the calculation . 23
5.6.1 General . 23
5.6.2 Mean value for roughness (r) . 23
5.6.3 Thermal resistance (1/Λ) . 23
5.7 Basic values for the calculation . 24
5.7.1 Air temperatures . 24
5.7.2 External air pressure (p ) . 26
L
5.7.3 Gas constant . 26
5.7.4 Density of the external air (ρ ) . 26
L
5.7.5 Specific heat capacity of the flue gas (c ) . 27
p
5.7.6 Condensing temperature (T ) . 27
sp
5.7.7 Correction factor for temperature instability (S ) . 27
H
5.7.8 Flow safety coefficient (S ) . 27
E
5.8 Determination of the temperatures . 27
5.8.1 General . 27
5.8.2 Calculation of the coefficient of cooling (K) . 28
5.8.3 Coefficient of heat transmission (k ) . 28
b
5.9 Determination of the density of the flue gas and the velocity of the flue gas . 31
5.9.1 Density of the flue gas (ρ ) . 31
m
5.9.2 Velocity of the flue gas (w ) . 31
m
2

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5.10 Determination of the pressures . 31
5.10.1 Pressure at the flue gas inlet into the chimney . 31
5.10.2 Theoretical draught available due to chimney effect (P ) . 32
H
5.10.3 Pressure resistance of the chimney (P ) . 33
R
5.10.4 Wind velocity pressure (P ) . 34
L
5.11 Minimum draught required at the flue gas inlet into the chimney and maximum
allowed draught (P and P ) and maximum and minimum differential pressure
Ze Zemax
at the flue gas inlet into the chimney (P and P ) . 35
ZOe ZOemin
5.11.1 General . 35
5.11.2 Minimum and maximum draught for the !combustion" appliance (P and
W
P ) and maximum and minimum differential pressure of the !combustion"
Wmax
appliance (P and P ) . 36
WO WOmin
5.11.3 Effective pressure resistance of the connecting flue pipe (P ) . 36
FV
5.11.4 Pressure resistance of the air supply (P ) . 37
B
5.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 38
iob
6 Secondary air for negative pressure chimneys . 40
6.1 General . 40
6.2 Calculation method . 40
6.3 Basic values for the calculation of secondary air . 40
6.3.1 General . 40
6.3.2 Mixing calculations . 40
6.4 Pressures . 41
6.4.1 Pressure resistance for the air supply with secondary air (P ) . 41
BNL
6.4.2 Draught required for the secondary air devices (P ) . 43
NL
6.4.3 Pressure resistance for that part of the connecting flue pipe before the secondary air
device (P ) . 44
FV1
6.4.4 Pressure requirement with secondary air . 44
6.5 Temperature requirement with secondary air . 44
7 Calculation method for balanced flue chimneys . 45
7.1 General principles . 45
7.2 Pressure requirements . 46
7.3 Temperature requirements . 46
7.4 Calculation procedure . 46
7.5 Flue gas data characterizing the !combustion" appliance . 47
7.6 Characteristic data for the calculation . 47
7.7 Basic values for the calculation . 47
7.7.1 Air temperatures . 47
7.7.2 Other basic values . 48
7.8 Determination of the temperatures . 48
7.8.1 Non-concentric (separate) ducts. 48
7.8.2 Concentric ducts – calculation based on a correction factor for heat radiation . 49
7.8.3 Concentric ducts – calculation based on calculated heat radiation . 64
7.8.4 Mean temperatures for pressure calculation . 68
7.9 Determination of densities and velocities . 69
7.9.1 Density and velocity of the flue gas . 69
7.9.2 Density and velocity of the !combustion" air . 69
7.10 Determination of pressures . 70
7.10.1 Pressure at the flue gas inlet into the chimney . 70
7.10.2 Theoretical draught due to chimney effect in the chimney segment (P ) . 70
H
7.10.3 Pressure resistance in the chimney segment (P ) . 70
R
7.10.4 Wind velocity pressure (P ) . 70
L
3

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EN 13384-1:2015+A1:2019 (E)
7.11 Minimum draught required at the flue gas inlet into the chimney and maximum
allowed draught (P and P ) and maximum and minimum differential pressure
Ze Zemax
at the flue gas inlet into the chimney (P and P ) . 71
ZOe ZOemin
7.11.1 General . 71
7.11.2 Minimum and maximum draught for the !combustion" appliance (P and
W
P ) and maximum and minimum differential pressure of the !combustion"
Wmax
appliance (P and P ) . 71
WO WOmin
7.11.3 Effective pressure resistance of the connection pipe (P ) . 71
FV
7.11.4 Pressure resistance of the air supply . 71
7.12 Calculation of the inner wall temperature at the chimney outlet (T ) . 74
iob
8 Consideration of the condensation heat of the flue gas water vapour . 75
8.1 General . 75
8.2 Onset of condensation . 75
8.3 Calculation of the flue gas temperature at the outlet of a chimney segment with
condensation (j ≥ NsegK) . 78
9 Consideration of chimney fans . 83
9.1 General . 83
9.2 Inline fans . 84
9.3 Exhaust fans . 85
Annex A (informative) Calculation of thermal resistance . 86
Annex B (informative) Tables . 87
Annex C (informative) Chimney outlet with regard to adjacent buildings . 104
Annex D (informative) Determination of the gas constant R considering the condensation . 105

4

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
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 13384-12015+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
5

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
— 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.
6

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SIST EN 13384-1:2015+A1:2019
EN 13384-1:2015+A1:2019 (E)
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
!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, Chimneys - General requirements
EN 1856-1, Chimneys - Requirements for metal chimneys - Part 1: System chimney products
EN 1859, Chimneys — Metal chimneys — Test methods
EN 13502, Chimneys - Requirements and test methods for clay/ceramic flue terminals
EN 15287-1:2007+A1:2010, Chimneys - Design, installation and commissioning of chimneys - Part 1:
Chimneys for non-roomsealed heating appliances
prEN 16475-2, Chimneys - Accessories - Part 2: Chimney fans - Requirements and test methods
CEN/TR 1749, European scheme for the classification of gas appliances according to the method of
evacuation of the combustion products (types)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1443 and the following apply.
!ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp"
3.1
heat output
Q
amount of heat produced by a !combustion"appliance per unit of time
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EN 13384-1:2015+A1:2019 (E)
3.1.1
nominal heat output
Q
N
continuous heat output specified by the manufacturer of the !combustion"appliance related to
specified fuels
3.1.2
heat output range
range of output below the nominal heat output specified by the manufacturer over which the appliance
can be used
3.2
heat input
Q
F
amount of heat in unit time which is supplied to the !combustion"appliance by the fuel based on its
net caloric value H
u
3.3
efficiency of the !combustion"appliance
η
W
ratio of the heat output (Q) from the appliance to the heat input (Q )
F
3.4
flue gas mass flow
m
mass of flue gas leaving the !combustion"appliance through the connecting flue pipe per time unit
3.5
effective height of the chimney
H
difference in height between the axis of the flue gas inlet into the chimney and the outlet of the chimney
3.6
effective height of the connecting flue pipe
H
V
difference in height between the axis of the flue gas chimney outlet of the !combustion"appliance
and the axis of the flue gas inlet into the chimney
Note 1 to entry In the case of open fire chimneys, H is the difference in height between the height of the
V
upper frame of the furnace and the axis of the flue gas inlet into the chimney.
3.7
draught
positive value of the negative pressure in the flue
3.8
theoretical draught available due to chimney effect
P
H
pressure difference caused by the difference in weight between the column of air equal to the effective
height outside a chimney and the column of flue gas equal to the effective height inside the chimney
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3.9
pressure resistance of the chimney
P
R
pressure which is necessary to overcome the resistance of the flue gas mass flow which exists when
carrying the flue gases through the chimney
3.10
wind velocity pressure
P
L
pressure generated on the chimney due to wind
3.11
minimum draught at the flue gas inlet into the chimney
P
Z
difference between the minimum theoretical draught and the sum of the maximum pressure resistance
of the chimney and the wind velocity pressure
3.12
maximum draught at the flue gas inlet into the chimney
P
Zmax
difference between the maximum theoretical draught and the minimum pressure resistance in the
chimney
3.13
minimum draught for the !combustion"appliance
P
W
difference between the static air pressure of the room of installation of the !combustion"appliance
and the static pressure of the flue gas at the chimney outlet of the appliance which is necessary to
maintain the correct operation of the !combustion"appliance
3.14
maximum draught for the !combustion"appliance
P
Wmax
difference between the static air pressure of the room of installation of the !combustion"appliance
and the static pressure of the flue gas at the outlet of the appliance which is the maximum allowed to
maintain the correct operation of the !combustion"appliance
3.15
effective pressure resistance of the connecting flue pipe
P
FV
static pressure difference between the axis of the inlet of the connecting flue pipe and the axis of the
chimney outlet due to the theoretical draught and pressure resistance
3.16
effective pressure resistance of the air supply
P
B
difference between the static pressure in the open air and the static air pressure in the room of
installation of the !combustion"appliance at the same height
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3.17
minimum draught required at the flue gas inlet into the chimney
P
Ze
sum of the minimum draught required for the !combustion"appliance and the draught required to
overcome the effective pressure resistance of the connecting flue pipe and the effective pressure
resistance of the air supply
3.18
maximum allowed draught at the flue gas inlet into the chimney
P
Zemax
sum of the maximum draught allowed for the !combustion"appliance and the draught required to
overcome the effective pressure resistance of the connecting flue pipe and the effective pressure
resistance of the air supply
3.19
maximum positive pressure at the flue gas inlet into the chimney
P
ZO
difference of the maximum pressure resistance and th
...