SIST EN ISO 10121-3:2023
(Main)Test methods for assessing the performance of gas-phase air cleaning media and devices for general ventilation - Part 3: Classification system for GPACDs applied to treatment of outdoor air (ISO 10121-3:2022)
Test methods for assessing the performance of gas-phase air cleaning media and devices for general ventilation - Part 3: Classification system for GPACDs applied to treatment of outdoor air (ISO 10121-3:2022)
This part of ISO 10121 establishes a classification system for GPACD’s supplying make-up air to
general ventilation systems using outdoor air polluted by local urban sources and/or long-distance
pollution. The classification system is intended to aid in assessing molecular pollution besides the
particulate pollution dealt with by ISO 16890-1.
Methode zur Leistungsermittlung von Medien und Vorrichtungen zur Reinigung der Gasphase für die allgemeine Lüftung - Teil 3: Klassifizierungssystem für die Behandlung von Außenluft (ISO 10121-3:2022)
Dieser Teil von ISO 10121 erstellt ein Klassifizierungssystem für GPACD, die Außenluft in einem Durchgang an allgemeine Belüftungssysteme unter Verwendung von durch lokale urbane Quellen und/oder Verschmutzung aus großer Entfernung verschmutzte Außenluft liefern. Zweck des Klassifizierungssystems ist es, die Beurteilung der molekularen Verschmutzung zusätzlich zu der in ISO 16890 1 behandelten Partikelverschmutzung zu unterstützen.
Die gewählten normativen Schmutzstoffe sind Ozon, Schwefeldioxid, Stickstoffdioxid und Toluol aufgrund ihrer Relevanz für den bestimmungsgemäßen Gebrauch. Jedem Schmutzstoff werden drei Beanspruchungsgrade zugewiesen, die den üblichen Leistungsbereich der für die Anwendung vorgesehenen Vorrichtungen wiedergeben. Die Beanspruchungsgrade sind mit der benötigten Leistung verbunden, aber die Verbindung einer spezifischen Beanspruchungsgradanforderung mit einer bestimmten Orts- oder Stadtgröße liegt außerhalb des Anwendungsbereichs dieser Klassifizierung. Der zu behandelnde Luftströmungstyp ist Außenluft zu Gebäuden, d. h. eine Filtration von einem riesigen Außenluftempfänger mit gekannten, relativ stabilen Konzentrationen, auch wenn die Konzentration täglich und jährlich variieren kann, und/oder lokal erhöhten Konzentrationen aufgrund von Hauptverkehrsstraßen. Die Prüfung erfolgt nach Abschnitt 5, Abschnitt 6 und ISO 10121 2.
Die Klassifizierung wird als integrierte Reinigungsleistung für den höchsten Beanspruchungsgrad, der der Vorrichtung zugewiesen werden kann, ausgedrückt. Jedem der vier normativen Schmutzstoffe wird eine separate Klasse zugewiesen. Da die Auswahl der normativen Schmutzstoffe und der Beanspruchungsgrade spezifisch ist und nur für den bestimmungsgemäßen Gebrauch gilt, sind alle anderen Anwendungen ausgeschlossen. Insbesondere sind GPACD in Rezirkulationsanwendungen und/oder die Verschmutzung aus Innenraumschmutzstoffen handhaben sowie pharmazeutische, mikroelektronische, nukleare, Heimatschutz- und militärische Anwendungen ausdrücklich ausgeschlossen.
Méthodes d’essai pour l’évaluation de la performance des médias et des dispositifs de filtration moléculaire pour la ventilation générale - Partie 3: Système de classification pour les GPACD appliqués au traitement de l’air extérieur (ISO 10121-3:2022)
Le présent document établit un système de classification pour les GPACD fournissant de l’air extérieur en passage unique à des systèmes de ventilation générale utilisant de l’air extérieur pollué par des sources urbaines locales et/ou une pollution à longue distance. Le système de classification est destiné à aider pour l’évaluation de la contamination moléculaire en plus de la contamination particulaire traitée par l’ISO 16890-1.
Le présent document spécifie quatre polluants de référence, c’est-à-dire l’ozone, le dioxyde de soufre, le dioxyde d’azote et le toluène, utilisés pour la classification du fait de leur pertinence pour l’application prévue. Le présent document spécifie trois niveaux de service qui sont assignés pour chaque polluant reflétant la plage de performance typique des dispositifs prévus pour l’application. Puisque le choix des polluants de référence et des niveaux de service est spécifique et unique pour l’application prévue, toutes autres applications sont exclues. En particulier, le présent document ne s’applique pas aux GPACD dans les applications de recirculation et/ou le traitement de la pollution provenant de sources intérieures ainsi que les applications pharmaceutiques, microélectroniques, nucléaires, de sécurité intérieure et militaires.
Preskusna metoda za ocenjevanje zmogljivosti sredstev in naprav za čiščenje plinske faze za splošno prezračevanje - 3. del: Sistem klasifikacije za GPACD, ki se uporablja za obdelavo zraka na prostem (ISO 10121-3:2022)
Ta del standarda ISO 10121 vzpostavlja sistem klasifikacije za naprave za čiščenje plinske faze (GPACD), ki dovajajo dodaten zrak v splošne prezračevalne sisteme, ki uporabljajo zunanji zrak, onesnažen z emisijami iz lokalnih mestnih virov in/ali oddaljenih virov onesnaženja. Sistem klasifikacije je predviden kot pomoč pri ocenjevanju molekularnega onesnaženja poleg onesnaženja s trdnimi delci, ki je obravnavano v standardu ISO 16890-1.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10121-3:2023
01-januar-2023
Preskusna metoda za ocenjevanje zmogljivosti sredstev in naprav za čiščenje
plinske faze za splošno prezračevanje - 3. del: Sistem klasifikacije za GPACD, ki se
uporablja za obdelavo zraka na prostem (ISO 10121-3:2022)
Test methods for assessing the performance of gas-phase air cleaning media and
devices for general ventilation - Part 3: Classification system for GPACDs applied to
treatment of outdoor air (ISO 10121-3:2022)
Methode zur Leistungsermittlung von Medien und Vorrichtungen zur Reinigung der
Gasphase für die allgemeine Lüftung - Teil 3: Klassifizierungssystem für die Behandlung
von Außenluft (ISO 10121-3:2022)
Méthodes d’essai pour l’évaluation de la performance des médias et des dispositifs de
filtration moléculaire pour la ventilation générale - Partie 3: Système de classification
pour les GPACD appliqués au traitement de l’air extérieur (ISO 10121-3:2022)
Ta slovenski standard je istoveten z: EN ISO 10121-3:2022
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
SIST EN ISO 10121-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 10121-3:2023
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SIST EN ISO 10121-3:2023
EN ISO 10121-3
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 91.140.30
English Version
Test methods for assessing the performance of gas-phase
air cleaning media and devices for general ventilation -
Part 3: Classification system for GPACDs applied to
treatment of outdoor air (ISO 10121-3:2022)
Méthodes d'essai pour l'évaluation de la performance Methode zur Leistungsermittlung von Medien und
des médias et des dispositifs de filtration moléculaire Vorrichtungen zur Reinigung der Gasphase für die
pour la ventilation générale - Partie 3: Système de allgemeine Lüftung - Teil 3: Klassifizierungssystem für
classification pour les GPACD appliqués au traitement die Behandlung von Außenluft (ISO 10121-3:2022)
de l'air extérieur (ISO 10121-3:2022)
This European Standard was approved by CEN on 25 September 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10121-3:2022 E
worldwide for CEN national Members.
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SIST EN ISO 10121-3:2023
EN ISO 10121-3:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 10121-3:2023
EN ISO 10121-3:2022 (E)
European foreword
This document (EN ISO 10121-3:2022) has been prepared by Technical Committee ISO/TC 142
"Cleaning equipment for air and other gases" in collaboration with Technical Committee CEN/TC 195
“Cleaning equipment for air and other gases” the secretariat of which is held by UNI.
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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. 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.
Endorsement notice
The text of ISO 10121-3:2022 has been approved by CEN as EN ISO 10121-3:2022 without any
modification.
3
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SIST EN ISO 10121-3:2023
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SIST EN ISO 10121-3:2023
INTERNATIONAL ISO
STANDARD 10121-3
First edition
2022-10
Test methods for assessing the
performance of gas-phase air cleaning
media and devices for general
ventilation —
Part 3:
Classification system for GPACDs
applied to treatment of outdoor air
Méthodes d’essai pour l’évaluation de la performance des médias
et des dispositifs de filtration moléculaire pour la ventilation
générale —
Partie 3: Système de classification pour les GPACD appliqués au
traitement de l’air extérieur
Reference number
ISO 10121-3:2022(E)
© ISO 2022
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.6
5 Classification system for outdoor air . 6
5.1 General . 6
5.2 Test setup and test parameters . 7
5.3 Initial removal efficiency . 8
5.4 Dose concept . 8
5.5 Classes, duty levels and dose . 8
5.6 Pollutants and concentrations . 9
5.7 Integrated removal efficiency . 9
5.8 Classification example graph . 10
5.9 Desorption and retentivity . 11
6 Classification test sequence .11
6.1 General . 11
6.2 Conditioning. 11
6.3 Initial removal efficiency .12
2
6.4 Capacity determination expressed as E (%) versus D (g/m ) .12
c N
6.4.1 Zero to LD . 12
6.4.2 Check E at LD .12
c
6.4.3 LD to MD . 12
6.4.4 MD to HD and HD .12
6.5 Retentivity . 13
6.6 Premature stop . 13
7 Classification system .13
7.1 General .13
7.2 LD, MD and HD dose values . 13
7.3 Classification example . 14
8 Report .15
8.1 General . 15
8.2 Test report layout . 15
Annex A (informative) Information about environment pollutant concentration in outdoor
air .22
Bibliography .24
iii
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other
gases, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 195, Cleaning equipment for air and other gases, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 10121 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
Introduction
There is an increasing need for gas-phase filtration in general filtration applications. This demand can
be expected to grow rapidly due to the increasing gaseous pollution problems in the world together with
an increasing awareness that solutions to the problems are available in the form of filtration devices or,
phrased more technically, gas-phase air cleaning devices (GPACD). The performance of devices relies
to a large extent on the performance of the gas-phase air cleaning media (GPACM) incorporated in the
device. The applications and device performance are often poorly understood by the users and suppliers
of such media and devices. Media tests can be adequate to offer data for real applications if actual low
concentrations (< 100 ppb) and longer exposure times (> weeks) can be used in the test, provided that
the geometrical configuration, packing density and flow conditions of the small-scale test specimen
are equal to those used in the real applications. Such tests are however not included in the scope of the
ISO 10121 series.
ISO 10121-1 and ISO 10121-2 aim to provide laboratory test methods for GPACM and GPACD respectively.
From the tests and reports produced, a person skilled in the field of molecular filtration can evaluate
the performance of different products as well as comparing performance using benchmark tests for
specific applications. To make these evaluations, a basic knowledge in chemistry, molecular filtration
and the application at hand are necessary.
Persons not skilled in molecular filtration face challenges with increasing pollution. Annex A shows
the annual average concentration of selected outdoor pollutants, the concentration differences of
different urban and industrial settings as well as an example of ambient air quality guidelines. The
air quality guideline is from WHO, where most countries have similar national threshold values. Due
to this increasing pollution in urban areas, any building owner, facility management engineer, design
engineers or maintenance personnel need to be able to evaluate GPACDs for general ventilation in
buildings. Different standards classifying air filters for particle filtration (e.g. ASHRAE 52.2 and
ISO 16890-1) have, together with many national standards, made a vast difference in facilitating the
selection of air filters for particle filtration for general ventilation in buildings. Equivalent standards
classifying molecular filtration devices, i.e. GPACDs, have not been available up to the publication of this
document. This document addresses the specific case of outdoor air to buildings in cities and aim to be
used in parallel with ISO 16890-1.
The ISO 10121 series consists of three parts.
— ISO 10121-1 covers three different media configurations and aims to provide a standardized interface
between media suppliers and producers of air cleaning devices. It may also be used between media
suppliers and end customers with regards to loose fill media properties.
— ISO 10121-2 aims to provide a standardized interface between suppliers of air cleaning devices and
end customers seeking the most cost-efficient way to employ gas-phase filtration.
— ISO 10121-3 provides a classification system for the specific application of GPACDs in general,
ventilation systems for cleaning of outdoor air polluted by local urban sources and/or long-range
transboundary air pollution.
v
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SIST EN ISO 10121-3:2023
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SIST EN ISO 10121-3:2023
INTERNATIONAL STANDARD ISO 10121-3:2022(E)
Test methods for assessing the performance of gas-phase
air cleaning media and devices for general ventilation —
Part 3:
Classification system for GPACDs applied to treatment of
outdoor air
1 Scope
This document establishes a classification system for GPACDs supplying single pass outdoor air to
general ventilation systems using outdoor air polluted by local urban sources and/or long-distance
pollution. The classification system is intended to aid in assessing molecular contamination in addition
to the particulate contamination dealt with by ISO 16890-1.
This document specifies four reference pollutants, i.e. ozone, sulphur dioxide, nitrogen dioxide and
toluene, used for the classification due to their relevance to the intended application. This document
further specifies three duty levels that are assigned for each pollutant reflecting the typical performance
range of devices intended for the application. Since selection of reference pollutants and duty levels are
specific and unique to the intended application, all other applications are excluded. In particular, this
document does not apply to GPACDs in recirculation applications and/or dealing with pollution from
indoor sources as well as pharmaceutical, microelectronic, nuclear, homeland security and military
applications.
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.
ISO 10121-2:2013, Test methods for assessing the performance of gas-phase air cleaning media and devices
for general ventilation — Part 2: Gas-phase air cleaning devices (GPACD)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
adsorption
process in which the molecules of a gas (3.14) or vapour adhere by physical or chemical processes to
the exposed surface of solid substances, both the outer surface and inner pore surface, with which they
come into contact
[SOURCE: ISO 29464:2017, 3.5.7]
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
3.2
adsorbate
molecular compound in gaseous or vapour phase that may be retained by an adsorbent (3.3) medium
[SOURCE: ISO 29464:2017, 3.5.3]
3.3
adsorbent
material having the ability to retain gaseous or vapour contaminants (3.10) on its surface by physical or
chemical processes
[SOURCE: ISO 29464:2017, 3.5.4]
3.4
ambient pressure
absolute barometric pressure immediately outside the test rig
[SOURCE: ISO 29464:2017, 3.5.50, modified — The word “barometric” has been added.]
3.5
adsorbate capacity
m
s
maximum amount (mass or moles) of a selected adsorbate (3.2) that can be contained in GAPC medium
or device under given test conditions and a specific end point (termination time)
Note 1 to entry: Capacity can also be negative during desorption (3.11).
[SOURCE: ISO 29464:2017, 3.5.12, modified — The symbol m and the words “maximum” and “a specific”
s
have been added.]
3.6
challenge air stream
test contaminant(s) (3.10) of interest diluted to the specified concentration(s) (3.9) of the test prior to
filtration
[SOURCE: ISO 29464:2017, 3.5.13]
3.7
challenge concentration
concentration (3.9) of the test contaminant(s) (3.10) of interest in the air stream prior to filtration
[challenge air stream (3.6)]
[SOURCE: ISO 29464:2017, 3.5.14]
3.8
challenge compound
chemical compound that is being used as the contaminant (3.10) of interest for any given test
[SOURCE: ISO 29464:2017, 3.5.15]
3.9
concentration
C
n
quantity of one substance dispersed in a defined amount of another
Note 1 to entry: Indices “n” denote location.
[SOURCE: ISO 29464:2017, 3.1.7, modified — The symbol C and Note 1 to entry have been added.]
n
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
3.10
contaminant
substance [solid, liquid or gas (3.14)] that negatively affects the intended use of a fluid
[SOURCE: ISO 29464:2017, 3.1.8, modified — The alternative term “pollutant” has been removed.]
3.11
desorption
process in which adsorbate (3.2) molecules leave the surface of the adsorbent (3.3) and re-enter the air
stream
Note 1 to entry: Desorption is the opposite of adsorption (3.1).
[SOURCE: ISO 29464:2017, 3.5.21]
3.12
downstream
area or region into which fluid flows on leaving the GPACD (3.15)
[SOURCE: ISO 29464:2017, 3.1.11, modified — “GPACD” has been used instead of “test device”.]
3.13
face velocity
volumetric air flow rate divided by the nominal GPACD face area (3.16)
Note 1 to entry: GPACD (3.15) face velocity is expressed in m/s.
[SOURCE: ISO 29464:2017, 3.1.15, modified — The alternative term “filter face velocity” has been
removed; “GPACD face area” and “GPACD face velocity” have been used instead of “filter face area” and
“filter face velocity”.]
3.14
gas
substance whose vapour pressure is greater than the ambient pressure (3.4) at ambient temperature
[SOURCE: ISO 29464:2017, 3.1.28]
3.15
gas-phase air cleaning device
GPACD
assembly of a fixed size enabling the removal of specific gas- or vapour-phase contaminants (3.10)
Note 1 to entry: It is normally box shaped or fits into a box of dimensions between 290 mm × 290 mm × 290 mm
up to approximately 610 mm × 610 mm × 610 mm or 2 ft × 2 ft × 2 ft.
[SOURCE: ISO 29464:2017, 3.5.32, modified — The box dimensions in note 1 to entry have been
modified.]
3.16
GPACD face area
nominal cross-sectional area of the GPACD (3.15)
Note 1 to entry: For the purpose of standardizing measurements, the nominal area is calculated using
610 mm × 610 mm for a full-size filter, 610 mm × 305 mm for a half-size filter and 305 mm × 305 mm for a quarter
size filter.
3.17
heavy duty
HD
duty level (specific dose) of a contaminant (3.10) that corresponds to a removal efficiency (3.29) versus
dose performance for a GPACD (3.15) that is used in challenging environments (e.g. heavily polluted
environments)
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SIST EN ISO 10121-3:2023
ISO 10121-3:2022(E)
3.18
initial dose
D
i
mass per GPACD face area (3.16) that reaches a GPACD (3.15) calculated from air flow in (volume per
time), time, pollution concentration (3.9) (mass per volume) and GPACD face area during the test phase
for determination of the initial efficiency (3.19)
3.19
initial efficiency
E
i
removal efficiency (3.29) of an unexposed filter or GPACD (3.15) calculated as soon as possible after the
start of a test
Note 1 to entry: For gas-phase, this should be calculated as soon as a steady reading can be obtained.
3.20
integrated removal efficiency
E
Σ
numerically integrated fraction or percentage of a challenge contaminant (3.10) that is removed by a
GPACD (3.15) over a specified time or dose period
3.21
light duty
LD
duty level (specific dose) of a contaminant (3.10) that corresponds to a removal efficiency (3.29) versus
dose performance for a GPACD (3.15) that is used as an entry level solution, for low concentrations (3.9)
or intermittent contamination episodes
3.22
medium duty
MD
duty level (specific dose) of a contaminant (3.10) that corresponds to a removal efficiency (3.29) versus
dose performance for a GPACD (3.15) that is used for medium concentrations (3.9) of contamination
3.23
molecular contamination
contamination present in gas (3.14) or vapour phase in an air stream and excluding compounds in
particulate (solid) phase regardless of their chemical nature
[SOURCE: ISO 29464:2017, 3.5.40]
3.24
normalised dose
D
N
mass per GPACD face area (3.16) that reaches a GPACD (3.15) calculated from air flow in (volume per
time), time, pollution concentration (3.9) (mass per volume) and GPACD face area
3.25
normalised retentivity
R
measure of the ability of an adsorbent (3.3) or GPACD (3.15) to resist desorption (3.11) of an adsorbate
(3.2) per GPACD face area (3.16)
Note 1 to entry: Computed as the residual capacity (fraction remaining) after purging the adsorbent with clean,
conditioned air only, following challenge breakthrough and expressed per GPACD face area (3.16).
[SOURCE: ISO 29464:2017, 3.5.53, modified — "normalised" has been added in the term, the symbol R
has been added, "per GPACD face area" has been added in the definition, "and expressed per GPACD face
area" has been added in Note 1 to entry.]
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SLOVENSKI STANDARD
oSIST prEN ISO 10121-3:2021
01-julij-2021
Preskusna metoda za ocenjevanje zmogljivosti sredstev in naprav za čiščenje
plinske faze za splošno prezračevanje - 3. del: Sistem klasifikacije za GPACD, ki se
uporablja za obdelavo zraka na prostem (ISO/DIS 10121-3:2021)
Test methods for assessing the performance of gas-phase air cleaning media and
devices for general ventilation - Part 3: Classification system for GPACDs applied to
treatment of outdoor air (ISO/DIS 10121-3:2021)
Methode zur Leistungsermittlung von Medien und Vorrichtungen zur Reinigung der
Gasphase für die allgemeine Lüftung - Teil 3: Klassifizierungssystem für die Behandlung
von Außenluft (ISO/DIS 10121-3:2021)
Méthodes d’essai pour l’évaluation de la performance des médias et des dispositifs de
filtration moléculaire pour la ventilation générale - Partie 3: Système de classification
pour les GPACD appliqués au traitement de l’air extérieur (ISO/DIS 10121-3:2021)
Ta slovenski standard je istoveten z: prEN ISO 10121-3
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
oSIST prEN ISO 10121-3:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 10121-3:2021
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oSIST prEN ISO 10121-3:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10121-3
ISO/TC 142 Secretariat: UNI
Voting begins on: Voting terminates on:
2021-05-05 2021-07-28
Test methods for assessing the performance of gas-phase
air cleaning media and devices for general ventilation —
Part 3:
Classification system for GPACDs applied to treatment of
outdoor air
ICS: 91.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
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BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 10121-3:2021(E)
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. ISO 2021
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
ISO/DIS 10121-3:2021(E)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 6
4.1 Symbols. 6
4.2 Abbreviated terms . 7
5 Classification system for outdoor air . 7
5.1 General . 7
5.2 Test setup and normative test parameters . 7
5.3 Initial removal efficiency . 8
5.4 Dose concept . 8
5.5 Classes, duty levels & dose . 9
5.6 Normative pollutants and concentrations . 9
5.7 Integrated removal efficiency . 10
5.8 Classification example graph . 10
5.9 Desorption and retentivity . 12
6 Classification test sequence . 12
6.1 General . 12
6.2 Conditioning . 12
6.3 Initial removal efficiency . 12
2
6.4 Capacity determination expressed as E [%] vs D [g/m ] . 13
C N
6.4.1 Zero to LD . 13
6.4.2 Check E at LD . 13
C
6.4.3 LD to MD . 13
6.4.4 MD to HD and HD . 13
6.5 Retentivity . 13
6.6 Premature Stop . 13
7 Classification system . 14
7.1 General . 14
7.2 Reporting of the LD, MD and HD dose values . 14
7.3 Classification example . 14
8 Report . 16
8.1 General . 16
8.2 Test report layout . 16
Annex A (informative) Information about environment pollutant concentration . 21
COPYRIGHT PROTECTED DOCUMENT
A.1 Pollutant concentration in outdoor air . 21
© ISO 2021
Bibliography . 23
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ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 6
4.1 Symbols. 6
4.2 Abbreviated terms . 7
5 Classification system for outdoor air . 7
5.1 General . 7
5.2 Test setup and normative test parameters . 7
5.3 Initial removal efficiency . 8
5.4 Dose concept . 8
5.5 Classes, duty levels & dose . 9
5.6 Normative pollutants and concentrations . 9
5.7 Integrated removal efficiency . 10
5.8 Classification example graph . 10
5.9 Desorption and retentivity . 12
6 Classification test sequence . 12
6.1 General . 12
6.2 Conditioning . 12
6.3 Initial removal efficiency . 12
2
6.4 Capacity determination expressed as E [%] vs D [g/m ] . 13
C N
6.4.1 Zero to LD . 13
6.4.2 Check E at LD . 13
C
6.4.3 LD to MD . 13
6.4.4 MD to HD and HD . 13
6.5 Retentivity . 13
6.6 Premature Stop . 13
7 Classification system . 14
7.1 General . 14
7.2 Reporting of the LD, MD and HD dose values . 14
7.3 Classification example . 14
8 Report . 16
8.1 General . 16
8.2 Test report layout . 16
Annex A (informative) Information about environment pollutant concentration . 21
A.1 Pollutant concentration in outdoor air . 21
Bibliography . 23
© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other
gases.
A list of all parts in the ISO 10121 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv © ISO 2021 – All rights reserved
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
Introduction
There is an increasing use and need for gas-phase filtration in general filtration applications. This demand
can be expected to increase rapidly due to the increasing gaseous pollution problems in the world
together with an increasing awareness that solutions to the problems are available in the form of
filtration devices or, phrased more technically, gas-phase air cleaning devices (GPACD). The performance
of devices relies to a large extent on the performance of a gas-phase air cleaning media (GPACM)
incorporated in the device. Still applications and device performance are often poorly understood by the
users and suppliers of such media and devices. Media tests may also be adequate to offer data for real
applications if actual low concentrations (< 100 ppb) and longer exposure times (>weeks) can be used in
the test, provided that the geometrical configuration, packing density and flow conditions of the small-
scale test specimen are equal to those used in the real applications. Such tests are however not included
in the scope of ISO 10121.
ISO 10121 parts 1 and 2 aim to provide laboratory test methods for GPACM and GPACD respectively.
From the tests and reports produced a person skilled in the field of molecular filtration can evaluate the
performance of different products as well as comparing performance by benchmark tests for specific
applications. However, to make these evaluations a basic knowledge in chemistry, molecular filtration
and the application at hand are necessary.
Today, not only persons skilled in molecular filtration face challenges with increasing pollution. Annex A
shows annual average concentration of selected outdoor pollutants, the concentration differences of
different urban and industrial settings as well as an example of ambient air quality guidelines. The air
quality guideline is from Malaysia, but most countries have similar national threshold values. Due to this
increasing pollution in urban areas any building owner, facility management engineer, design engineers
or maintenance personnel needs to be able to evaluate GPACD’s for general ventilation in buildings.
Different standards classifying air filters for particle filtration e.g. ASHRAE 52.2, and ISO 16890 have
together with many national standards made a vast difference in assisting selection of air filters for
particle filtration for general ventilation in buildings. Such standards classifying molecular filtration
devices i.e. GPACD’s have to this date not been available. Part three of this series addresses the specific
case of outdoor air to buildings in cities and aim to be used in parallel with ISO 16890-1.
ISO 10121 consists of three parts:
— ISO 10121-1 covers three different media configurations and is targeted towards giving a standardized
interface between media suppliers and producers of air cleaning devices. It may also be used between
media suppliers and end customers with regards to loose fill media properties.
— ISO 10121-2 aims to give a standardized interface between suppliers of air cleaning devices and end
customers seeking the most cost-efficient way to employ gas-phase filtration.
—ISO 10121-3 provides a classification system for the specific application of GPACD’s to general
ventilation of outdoor air polluted by local urban sources and/or long-distance pollution.
© ISO 2021 – All rights reserved v
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oSIST prEN ISO 10121-3:2021
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
Test methods for assessing the performance of gas-phase air
cleaning media and devices for general ventilation — Part 3:
Classification system for GPACD’s applied to treatment of make-up
air
1 Scope
This part of ISO 10121 establishes a classification system for GPACDs supplying single pass outdoor air
to general ventilation systems using outdoor air polluted by local urban sources and/or long-distance
pollution. The classification system is intended to aid in assessing molecular pollution in addition to the
particulate pollution dealt with by ISO 16890-1.
The selected normative pollutants are ozone, sulphur dioxide, nitrogen dioxide and toluene due to their
relevance to the intended application. Three duty levels are assigned for each pollutant reflecting the
typical performance range of devices intended for the application. The duty levels are related to the
performance needed, but it is not in the scope of this classification to relate a specific duty level need to a
certain place or city size. The air flow type to be covered is outdoor air to buildings i.e. a one pass filtration
from a vast outdoor recipient of known fairly stable concentrations even if the concentration may have
daily and yearly variations and/or local increased concentrations due to main traffic routes. The testing
is performed according to clause 5, clause 6 and ISO 10121-2.
The classification is expressed as an integrated removal efficiency for the highest duty level that the
device may be awarded. A separate class is given for each of the four normative pollutants. Since selection
of normative pollutants and duty levels are specific and unique to the intended application, all other
applications are excluded. In particular, GPACDs in recirculation applications and/or dealing with
pollution from indoor sources as well as pharmaceutical, microelectronic, nuclear, homeland security and
military applications are specifically excluded.
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.
ISO 10121-2, Test methods for assessing the performance of gas-phase air cleaning media and devices for
general ventilation — Part 2: Gas-phase air cleaning devices (GPACD)
ISO 16890-1, Air filters for general ventilation - Part 1: Technical specifications, requirements and
classification system based upon particulate matter efficiency (ePM)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 29464 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
— IEC Electropedia: available at http://www.electropedia.org/
3.1
adsorption
process in which the molecules of a gas or vapour adhere by physical or chemical processes to the
exposed surface of solid substances, both the outer surface and inner pore surface, with which they come
into contact
[Source: ISO 29464:2017; 3.5.7]
3.2
adsorbate
molecular compound in gaseous or vapour phase that may be retained by an adsorbent (3.3) medium
[Source: ISO 29464:2017; 3.5.3]3.3
adsorbent
material having the ability to retain gaseous or vapour contaminants on its surface by physical or
chemical processes
[Source: ISO 29464:2017; 3.5.3]
3.4
ambient pressure
absolute barometric pressure immediately outside the test rig
[Source: ISO 29464:2017; 3.5.50, modified]
3.5
adsorbate capacity
m
s
maximum amount (mass or moles) of a selected adsorbate (3.2) that can be contained in GAPC medium
or device under given test conditions, and a specific end point (termination time)
Note 1 to entry: Capacity can also be negative during desorption (3.11).
[Source: ISO 29464:2017; 3.5.12]
3.6
challenge air stream
test contaminant(s) (3.10) of interest diluted to the specified concentration(s) of the test prior to
filtration
[Source: ISO 29464:2017; 3.5.13]
3.7
challenge concentration
concentration of the test contaminant(s) (3.10) of interest in the air stream prior to filtration (challenge
air stream (3.6))
[Source: ISO 29464:2017; 3.5.14]
3.8
challenge compound
chemical compound that is being used as the contaminant (3.10) of interest for any given test
2 © ISO 2021 – All rights reserved
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
[Source: ISO 29464:2017; 3.5.15]
3.9
concentration
Cn
quantity of one substance dispersed in a defined amount of another
Note 1 to entry: Indices “n” denote location.
[Source: ISO 29464:2017; 3.1.7, modified - Cn and note 1 to entry have been added]
3.10
contaminant
substance (solid, liquid or gas) that negatively affects the intended use of a fluid
[Source: ISO 29464:2017; 3.1.8]
3.11
desorption
process in which adsorbate (3.2) molecules leave the surface of the adsorbent and re-enter the air stream
Note 1 to entry: Desorption is the opposite of adsorption.
[Source: ISO 29464:2017; 3.5.21]
3.12
downstream
area or region into which fluid flows on leaving the GPACD
[Source: ISO 29464:2017; 3.1.11, modified – GPACD is used instead of test device]
3.13
Normative Dose
D
N
dose [mass/GPACD face area] that reaches a GPACD calculated from air flow in [volume/time], time,
pollution concentration [mass /volume] and GPACD face area
3.14
efficiency vs. capacity curve
plot of the GPACD removal efficiency (3.30) against the integrated capacity over the duration of a
challenge test for a particular challenge concentration (3.7) and airflow
[Source: ISO 29464:2017; 3.5.22]
3.15
efficiency vs. time curve
plot of the GPACD removal efficiency (3.30) against time over the duration of a challenge test for a
particular challenge concentration (3.7) and airflow
[Source: ISO 29464:2017; 3.5.23]
3.16
face velocity
volumetric air flow rate divided by the nominal GPACD face area
© ISO 2021 – All rights reserved 3
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oSIST prEN ISO 10121-3:2021
ISO/DIS 10121-3:2021(E)
Note 1 to entry: GPACD face velocity is expressed in m/s.
[Source: ISO 29464:2017; 3.1.15, modified – GPACD face area is used instead of filter face area]
3.17
gas
substance whose vapour pressure is greater than the ambient pressure (3.4) at ambient temperature
[Source: ISO 29464:2017; 3.1.28]
3.18
gas-phase air cleaning device
GPACD
assembly of a fixed size enabling the removal of specific gas- or vapour-phase contaminants
Note 1 to entry: It is normally box shaped or fits into a box of dimensions between 290 × 290 × 290 mm
up to approximately 610 × 610 × 610 mm or 2 × 2 × 2 feet.
[Source: ISO 29464:2017; 3.5.32, modified – Note has been modified.]
3.19
GPACD face area
nominal cross-sectional area of the GPACD
Note 1 to entry: For the purpose of standardizing measurements, the nominal area is calculated using
610 x 610 mm for a full size filter, 610 x 305 mm for a half size filter and 305 x 305 mm for a quarter size
filter.
3.20
heavy-duty
HD
corresponds to a removal efficiency versus dose performance for a GPACD that is used in challenging
environments e.g. heavily polluted environments.
3.21
initial efficiency
removal efficiency of an unexposed filter or GPACD calculated as soon as possible after the start of a test
Note 1 to entry: For gas-phase, this should be calculated as soon as a steady reading can be obtained.
3.22
integrated removal efficiency
E
Σ
the numerically integrated fraction or percentage of a challenge contaminant that is removed by a GPACD
over a specified time or dose
...
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