SIST EN ISO 12569:2018

SLOVENSKI STANDARD
SIST EN ISO 12569:2018
01-februar-2018
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SIST EN ISO 12569:2013
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Thermal performance of buildings and materials - Determination of specific airflow rate in
buildings - Tracer gas dilution method (ISO 12569:2017)
Wärmetechnisches Verhalten von Gebäuden und Werkstoffen - Bestimmung des
spezifischen Luftvolumenstroms in Gebäuden - Indikatorgasverfahren (ISO 12569:2017)
Performance thermique des bâtiments et des matériaux - Détermination du débit d'air
spécifique dans les bâtiments - Méthode de dilution de gaz traceurs (ISO 12569:2017)
Ta slovenski standard je istoveten z: EN ISO 12569:2017
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
SIST EN ISO 12569:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12569:2018

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SIST EN ISO 12569:2018


EN ISO 12569
EUROPEAN STANDARD

NORME EUROPÉENNE

September 2017
EUROPÄISCHE NORM
ICS 91.120.10 Supersedes EN ISO 12569:2012
English Version

Thermal performance of buildings and materials -
Determination of specific airflow rate in buildings - Tracer
gas dilution method (ISO 12569:2017)
Performance thermique des bâtiments et des Wärmetechnisches Verhalten von Gebäuden und
matériaux - Détermination du débit d'air spécifique Werkstoffen - Bestimmung des spezifischen
dans les bâtiments - Méthode de dilution de gaz Luftvolumenstroms in Gebäuden -
traceurs (ISO 12569:2017) Indikatorgasverfahren (ISO 12569:2017)
This European Standard was approved by CEN on 6 July 2017.

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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12569:2017 E
worldwide for CEN national Members.

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SIST EN ISO 12569:2018
EN ISO 12569:2017 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 12569:2018
EN ISO 12569:2017 (E)
European foreword
This document (EN ISO 12569:2017) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with Technical Committee
CEN/TC 89 “Thermal performance of buildings and building components” the secretariat of which is
held by SIS.
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 March 2018 and conflicting national standards shall be
withdrawn at the latest by March 2018.
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 supersedes EN ISO 12569:2012.
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, 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.
Endorsement notice
The text of ISO 12569:2017 has been approved by CEN as EN ISO 12569:2017 without any modification.
3

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SIST EN ISO 12569:2018

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SIST EN ISO 12569:2018
INTERNATIONAL ISO
STANDARD 12569
Third edition
2017-08
Thermal performance of buildings and
materials — Determination of specific
airflow rate in buildings — Tracer gas
dilution method
Performance thermique des bâtiments et des matériaux —
Détermination du débit d'air spécifique dans les bâtiments —
Méthode de dilution de gaz traceurs
Reference number
ISO 12569:2017(E)
©
ISO 2017

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SIST EN ISO 12569:2018
ISO 12569:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 12569:2018
ISO 12569:2017(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4 Measurement method and its selection . 2
4.1 General . 2
4.2 Concentration decay method . 4
4.2.1 Principle . 4
4.2.2 Two-point decay method . 5
4.2.3 Multipoint decay method . 6
4.2.4 Step-down exhaust concentration method . 6
4.2.5 Pulse method . 7
4.3 Continuous dose method . 8
4.3.1 Principle . 8
4.3.2 Average inverse concentration method . 8
4.3.3 Average concentration method . 9
4.3.4 Stationary concentration method .10
4.4 Constant concentration method .10
4.5 Type of tracer gas.10
4.6 Measurement apparatus .11
4.6.1 General.11
4.6.2 Tracer gas dosing device .13
4.6.3 Tracer gas sampling apparatus .14
4.6.4 Gas analyser .14
5 Procedure.14
5.1 Building preparations .14
5.2 Ancillary measurements .14
5.3 Concentration decay method .15
5.3.1 Calculation of two-point and multi-point methods .15
5.3.2 Procedure of two-point and multi-point methods .16
5.3.3 Calculation of step-down exhaust concentration method and pulse method .17
5.3.4 Procedure of the step-down exhaust concentration method and pulse method .18
5.4 Continuous dose methods .21
5.4.1 Calculation of average of inverse concentration method.21
5.4.2 Procedure of average of inverse concentration method .22
5.4.3 Calculation of average concentration method .23
5.4.4 Procedure of average concentration method .24
5.4.5 Calculation of stationary concentration method .25
5.4.6 Procedure of stationary concentration method.25
5.5 Constant concentration method .27
5.5.1 Calculation of constant concentration method .27
5.5.2 Procedure of constant concentration method .27
6 Accuracy .28
6.1 General .28
6.2 Tracer gas dose procedure and room concentration distribution .29
6.3 Tracer gas sampling and storage method .29
6.4 Tracer gas concentration measuring instruments .29
6.4.1 General.29
6.4.2 Resolution .29
6.4.3 Tracer gas analyser drift.29
6.4.4 Accuracy of tracer gas analyser .29
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SIST EN ISO 12569:2018
ISO 12569:2017(E)

6.4.5 Calibration of tracer gas analyser .30
6.4.6 Standard gas concentration .30
6.5 Changes in outside wind and outdoor air temperature and schedule of air
conditioning system .30
7 Test report .30
7.1 General .30
7.2 Details necessary to identify the simulation tested .31
7.3 Details of heating and ventilation systems .31
7.4 Test conditions and apparatus .31
7.5 Collected data and results .31
7.6 Date of the test .32
Annex A (normative) Confidence intervals .33
Annex B (normative) Method to estimate ventilation rate Q and effective mixed zone
v
[3][4]
volume V simultaneously .36
emz
Annex C (informative) Considerations when measuring the ventilation rate of large spaces .41
Annex D (informative) Effects of internal and external temperature difference, temperature
change, and outdoor air concentration change during the measurement period .42
Annex E (informative) Estimation error minimizing method in two-point and multi-point
decay methods .46
Annex F (informative) Propagation of error analysis .51
Bibliography .53
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SIST EN ISO 12569:2018
ISO 12569:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 1, Test and measurement methods.
This third edition cancels and replaces the second edition (ISO 12569:2012), which has been technically
revised.
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SIST EN ISO 12569:2018
ISO 12569:2017(E)

Introduction
The aim of ventilation is to maintain a proper hygienic status of the room by introducing outdoor air
and diluting contaminants, heat, moisture or odour generated in the room, and evacuating them. In
terms of energy savings, it is also important to keep the ventilation at the required rate, in order to
reduce heat loss and heat gain under air conditioning as much as possible. Measurement of airflow rates
is often necessary, for example, to check if the performance of a ventilation system is as intended, to
assess the source strength of contaminants, to ensure that contaminants are properly eliminated, etc.
The methods described here can be used to measure the ventilation rate or the specific airflow rate.
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SIST EN ISO 12569:2018
INTERNATIONAL STANDARD ISO 12569:2017(E)
Thermal performance of buildings and materials —
Determination of specific airflow rate in buildings —
Tracer gas dilution method
1 Scope
This document establishes methods to obtain the ventilation rate or specific airflow rate in a building
space (which is considered to be a single zone) using a tracer gas.
The measurement methods apply for spaces where the combined conditions concerning the uniformity
of tracer gas concentration, measurement of the exhaust gas concentration, effective mixed zone and/or
fluctuation of ventilation are satisfied.
This document provides three measurement methods using a tracer gas: concentration decay method,
continuous dose method, and constant concentration method.
NOTE Specific measurement conditions are given in Table 1.
2 Normative references
There are no normative references in this document.
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
single zone
V
space which only exchanges air with the outside
3.2
effective mixed zone
V
emz
space within a single zone (3.1), excluding sealed furniture or storage space, in which tracer gas (3.6)
supplied to the zone is regarded as uniformly distributed
Note 1 to entry: Measured in cubic metres.
Note 2 to entry: Forced mixing of air in the zone is often needed to keep uniform tracer gas concentration.
3.3
ventilation rate
Q
v
total volume of air passing through the zone to the outside per unit of time
3 3
Note 1 to entry: Measured in m /s or m /h.
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SIST EN ISO 12569:2018
ISO 12569:2017(E)

3.4
specific airflow rate
N
ratio of the ventilation rate (3.3) of a zone to the volume of the effective mixed zone (3.2), per second or
per hour
3.5
building envelope
boundary or barrier separating the interior volume of a building from the outside environment
3.6
tracer gas
gas that can be mixed with air and measured in very small concentration in order to study airflow rate
3.7
concentration decay method
method by which the specific airflow rate (3.4) is obtained from the decaying curve of concentration
observed after the end of the injection of tracer gas (3.6)
3.8
continuous dose method
method by which the ventilation rate (3.3) is obtained from the concentration resulting from continuous
generation or injection of the tracer gas (3.6)
3.9
constant concentration method
method by which the ventilation rate (3.3) is obtained from the injection rate of tracer gas (3.6) dosed
for constant concentration in the space
4 Measurement method and its selection
4.1 General
Selection of a measurement method and data processing depends on the building structure, ventilation
system and measurement instrument employed. One of the three measurement methods (concentration
decay method, continuous dose method and constant concentration method) is used to estimate the
ventilation rate or specific airflow rate. The concentration decay method has a limited measurement
time of up to several hours while the continuous dose and constant concentration methods can provide
a longer measurement time up to several weeks. The guideline of selection of the method and what is
measured by the method is listed in Table 1.
In order to improve the accuracy of deriving the ventilation rate or specific airflow rate, it is sometimes
necessary to devise measures that approximate prerequisite conditions demanded of measurement
methods. In particular, if a measurement method were used that requires uniformity of concentration
in the effective mixed zone, it would be preferable to forcibly mix the internal air. In general, forced
mixing of internal air has little effect on ventilation rate or specific airflow rate, but there is a risk that
forced mixing affects the measured ventilation rate if natural ventilation due to temperature differences
predominates and the temperature within the room is distributed significantly, or if airflow emitted
from a fan for the purpose of mixing air directly impinges on the leakage areas in buildings. In such
instances, a mixing system needs to be improved or it would be recommended to select a measurement
method that could ensure uniformity of concentration without mixing.
In Table 1, specifications for the various applications are described as follows.
— “Room concentration can be maintained uniform at initial stage only” means making the
concentration in the effective mixed zone uniform by a method such as forced mixing when
supplying a tracer gas into the zone, but allowing the concentration to be distributed in principle
with the measurement.
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SIST EN ISO 12569:2018
ISO 12569:2017(E)

— If it is specified that “room concentration can be maintained uniform at all times”, continuous forced
mixing of air in the effective mixed zone is preferable. However, if the constant concentration method
is used, and if concentration is controlled by injecting the tracer gas at several places and air is
sampled at several locations, it is possible to assume that concentration is uniform without mixing.
— “Average exhaust concentration can be measured” can either mean instances in which concentration
in an effective mixed zone is made uniform using mixing, or instances whereby the pressure inside
a zone is kept lower than the outside when using the exhaust ventilation system, or the leakage area
is extremely low so the exfiltration rate may be ignored and exhaust pathways may be specified
beforehand.
— When using measurement methods that require the “known volume of an effective mixed zone”, the
volume of the effective mixed zone can be estimated using room dimensions. However, when using
the corresponding average inverse concentration method and average concentration method, high
accuracy for estimating the volume of an effective mixed zone is not needed if a sufficiently long
time is taken to evaluate the ventilation rate.
— Measurement methods that can be applied in instances where “fluctuation in ventilation rate can be
ignored” are designed on the assumption that the ventilation rate or specific airflow rate over time
does not change.
— The tracer gas volume is defined as the value of exhaust temperature converted into density. When
the room air is mixed well, the room temperature approximately matches the exhaust temperature.
— In addition to the measurement methods in Table 1, there is an intermittent dose method that allows
the measurement of the volume of an effective mixed zone and ventilation rate at the same time.
— For measurement of ventilation rate among the other measurements, if volume of an effective mixed
zone is known, the ventilation rate can be obtained by multiplying the volume of the effective mixed
zone by the specific airflow rate, and then converting to ventilation rate.
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ISO 12569:2017(E)

Table 1 — Relationship of method, application and estimated quantities
Application and measured quantities
Application What is measured
Room
Room Flexibility
concentra- Average Fluctu-
concentra- Known Ventilation to signif-
Method
tion can be exhaust ation in
tion can be
...