SIST EN ISO 16890-2:2022

Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow resistance (ISO 16890-2:2022)

This document specifies the aerosol production, the test equipment and the test methods used for
measuring fractional efficiency and air flow resistance of air filters for general ventilation.
It is intended to be used in conjunction with ISO 16890-1, ISO 16890-3 and ISO 16890-4.
The test method described in this document is applicable for air flow rates between 0,25 m3/s
(900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal
face area of 610 mm × 610 mm (24.0 inches × 24.0 inches).
This document refers to particulate air filter elements for general ventilation having an ePM1 efficiency
less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested as per the procedures
defined within the ISO 16890 series.
NOTE The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it is very
difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
This document is not applicable to filter elements used in portable room-air cleaners.

Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des Fraktionsabscheidegrades und des Durchflusswiderstandes (ISO 16890-2:2022)

Dieser Teil von ISO 16890 legt die Aerosolherstellung, die Prüfmittel und Prüfverfahren fest, die zur Ermittlung des Fraktionsabscheidegrads und des Strömungswiderstands von Luftfilter für die allgemeine Raumtechnik verwendet werden.
Er ist für die Anwendung in Verbindung mit ISO 16890 1, ISO 16890 3 und ISO 16890 4 vorgesehen.
Das in diesem Teil der ISO 16890 beschriebene Prüfverfahren ist für Volumenströme zwischen 0,25 m3/s (900 m3/h, 530 ft3/min) und 1,5 m3/s (5 400 m3/h, 3 178 ft3/min) anwendbar, bei einem Prüfstand mit einer nominellen Anströmfläche von 610 mm × 610 mm (24 inch × 24 inch).
ISO 16890 (alle Teile) bezieht sich auf Partikelluftfilterelemente für die allgemeine Raumlufttechnik mit einem ePM1-Abscheidegrad von weniger als oder gleich 99 % und einem ePM10-Abscheidegrad von mehr als 20 % bei der Prüfung nach den in ISO 16890 (alle Teile) festgelegten Verfahren.
ANMERKUNG   Die untere Grenze für dieses Prüfverfahren liegt bei einem ePM10-Mindest-Abscheidegrad von 20 %, da es für ein Prüffilterelement unterhalb dieses Niveaus schwer wird, die Anforderungen an die statistische Gültigkeit von diesem Verfahren zu erreichen.
Luftfilterelemente, die sich nicht in dieser Aerosolfraktion befinden, werden nach anderen anwendbaren Prüfverfahren bewertet (siehe ISO 29463 (alle Teile)).
Filterelemente, die in tragbaren Raumluftreinigern verwendet werden, sind vom Anwendungsbereich dieses Teils der ISO 16890 ausgeschlossen.
Die Leistungsergebnisse, die entsprechend ISO 16890 (alle Teile) ermittelt wurden, können nicht für sich allein dazu verwendet werden, den Abscheidegrad und die Lebensdauer im realen Betrieb quantitativ vorauszubestimmen.

Filtres à air de ventilation générale - Partie 2: Mesurage de l'efficacité spectrale et de la résistance à l'écoulement de l'air (ISO 16890-2:2022)

Le présent document spécifie la production d'aérosol, l'équipement d'essai et les méthodes d'essai utilisés pour mesurer l'efficacité spectrale et la résistance à l'écoulement de l'air des filtres à air de ventilation générale.
Il est destiné à être utilisé conjointement avec l'ISO 16890‑1, l’ISO 16890‑3 et l’ISO 16890‑4.
La méthode d'essai décrite dans le présent document est applicable pour des débits d'air compris entre 0,25 m3/s (900 m3/h, 530 ft3/min) et 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), en se référant à un banc d'essai ayant une surface frontale nominale de 610 mm × 610 mm (24.0 inches × 24.0 inches).
Le présent document concerne les éléments filtrants pour l’élimination des particules pour la ventilation générale ayant une efficacité ePM1 inférieure ou égale à 99 % et une efficacité ePM10 supérieure à 20 % lorsqu'ils sont soumis à essai selon les modes opératoires définis dans la série ISO 16890.
NOTE         La limite inférieure pour ce mode opératoire d'essai est fixée à une efficacité minimale ePM10 de 20 % étant donné qu’il est très difficile pour un élément filtrant d’essai en dessous de ce niveau de respecter les exigences de validité statistique de ce mode opératoire.
Le présent document n’est pas applicable aux éléments filtrants utilisés dans les épurateurs d'air ambiant portatifs.

Zračni filtri pri splošnem prezračevanju - 2. del: Merjenje frakcijske učinkovitosti in odpornosti proti toku zraka (ISO 16890-2:2022)

Ta dokument določa proizvodnjo aerosola, preskusno opremo in preskusne metode, ki se uporabljajo za merjenje frakcijske učinkovitosti in odpornosti proti toku zraka zračnih filtrov pri splošnem prezračevanju. Predviden je za uporabo v povezavi s standardi ISO 16890-1, ISO 16890-3 in ISO 16890-4. Preskusna metoda, opisana v tem dokumentu, se uporablja za stopnje pretoka zraka med 0,25 m3/s (900 m3/h, 530 ft3/min) in 1,5 m3/s (5400 m3/h, 3178 ft3/min), pri čemer se uporablja preskusna oprema z nazivno površino 610 × 610 mm (24,0 × 24,0 palcev). Ta dokument se uporablja za vložke zračnih filtrov delcev pri splošnem prezračevanju, ki pri preskušanju v skladu s postopki, določenimi v skupini standardov ISO 16890, dosegajo učinkovitost 99 % ali manj glede na vrednosti ePM1 in več kot 20 % glede na vrednosti ePM10. OPOMBA: Spodnja meja, določena za ta preskusni postopek, je vsaj 20-odstotna učinkovitost glede na vrednost ePM10, saj je vložek zračnega filtra, ki ne dosega te stopnje, zelo težko preskusiti tako, da bi bile izpolnjene zahteve glede statistične veljavnosti v skladu s tem postopkom. Ta dokument se ne uporablja za vložke filtrov, ki se uporabljajo v prenosnih čistilnikih zraka v prostorih.

General Information

• Status: Published
• Public Enquiry End Date: 31-Jul-2020
• Publication Date: 11-Sep-2022
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Sep-2022
• Due Date: 12-Nov-2022
• Completion Date: 12-Sep-2022
• Ref Project: EN ISO 16890-2:2022 - Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow resistance (ISO 16890-2:2022)

Relations

• Replaces: SIST EN ISO 16890-2:2017 - Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow resistance (ISO 16890-2:2016)
• Effective Date: 07-Sep-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16890-2:2022
01-oktober-2022
Nadomešča:
SIST EN ISO 16890-2:2017
Zračni filtri pri splošnem prezračevanju - 2. del: Merjenje frakcijske učinkovitosti in
odpornosti proti toku zraka (ISO 16890-2:2022)
Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow
resistance (ISO 16890-2:2022)
Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des
Fraktionsabscheidegrades und des Durchflusswiderstandes (ISO 16890-2:2022)
Filtres à air de ventilation générale - Partie 2: Mesurage de l'efficacité spectrale et de la
résistance à l'écoulement de l'air (ISO 16890-2:2022)
Ta slovenski standard je istoveten z: EN ISO 16890-2:2022
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
SIST EN ISO 16890-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16890-2:2022

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SIST EN ISO 16890-2:2022


EN ISO 16890-2
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2022
EUROPÄISCHE NORM
ICS 91.140.30 Supersedes EN ISO 16890-2:2016
English Version

Air filters for general ventilation - Part 2: Measurement of
fractional efficiency and air flow resistance (ISO 16890-
2:2022)
Filtres à air de ventilation générale - Partie 2: Luftfilter für die allgemeine Raumlufttechnik - Teil 2:
Mesurage de l'efficacité spectrale et de la résistance à Ermittlung des Fraktionsabscheidegrades und des
l'écoulement de l'air (ISO 16890-2:2022) Durchflusswiderstandes (ISO 16890-2:2022)
This European Standard was approved by CEN on 21 July 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 16890-2:2022 E
worldwide for CEN national Members.

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SIST EN ISO 16890-2:2022
EN ISO 16890-2:2022 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 16890-2:2022
EN ISO 16890-2:2022 (E)
European foreword
This document (EN ISO 16890-2:2022) 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 February 2023, and conflicting national standards
shall be withdrawn at the latest by February 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.
This document supersedes EN ISO 16890-2:2016.
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 16890-2:2022 has been approved by CEN as EN ISO 16890-2:2022 without any
modification.


3

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SIST EN ISO 16890-2:2022

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SIST EN ISO 16890-2:2022
INTERNATIONAL ISO
STANDARD 16890-2
Second edition
2022-07
Air filters for general ventilation —
Part 2:
Measurement of fractional efficiency
and air flow resistance
Filtres à air de ventilation générale —
Partie 2: Mesurage de l'efficacité spectrale et de la résistance à
l'écoulement de l'air
Reference number
ISO 16890-2:2022(E)
© ISO 2022

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SIST EN ISO 16890-2:2022
ISO 16890-2:2022(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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

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SIST EN ISO 16890-2:2022
ISO 16890-2:2022(E)
Contents Page
Foreword . vi
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Air flow and resistance . 2
3.2 Test device . 2
3.3 Aerosol . 2
3.4 Particle counter . 3
3.5 Efficiency . 3
3.6 Other terms . 4
4 Symbols and abbreviated terms.4
4.1 Symbols . 4
4.2 Abbreviated terms . 6
5 General test requirements . 6
5.1 Test device requirements . 6
5.2 Test device installation . 6
5.3 Test rig requirements . 7
6 Test materials . 7
6.1 Liquid phase aerosol . 7
6.1.1 DiEthylHexylSebacate (DEHS) test aerosol . 7
6.1.2 DEHS properties . 7
6.1.3 Liquid phase aerosol generation . 7
6.2 Solid phase aerosol . 8
6.2.1 Potassium chloride (KCl) test aerosol . 8
6.2.2 KCl properties . 8
6.2.3 Solid phase aerosol generation . 9
6.3 Reference aerosols . 10
6.3.1 Reference aerosol for 0,3 µm to 1,0 µm . 10
6.3.2 Reference aerosol for 1,0 µm to 10,0 µm . . 10
6.4 Aerosol loading . 10
7 Test equipment .11
7.1 Test rig . 11
7.1.1 Dimensions . 11
7.1.2 Construction materials . 11
7.1.3 Test rig shape . 12
7.1.4 Test rig air supply .12
7.1.5 Test rig isolation .12
7.1.6 D/S mixing orifice .12
7.1.7 Aerosol sampling .13
7.1.8 Test rig air flow rate measurement . 15
7.1.9 Resistance to air flow measurement . 15
7.1.10 Test devices not measuring 610 mm × 610 mm (24.0 inches × 24.0 inches) . 16
7.1.11 Dust injection testing . 16
7.2 Aerosol particle counter . . 17
7.2.1 General . 17
7.2.2 OPC sampled size range . 17
7.2.3 OPC particle size ranges . 17
7.2.4 Sizing resolution . 18
7.2.5 Calibration . . . 18
7.2.6 Air flow rate . 18
7.2.7 Zero counting . 18
iii
© ISO 2022 – All rights reserved

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SIST EN ISO 16890-2:2022
ISO 16890-2:2022(E)
7.2.8 Dual OPC(s) . 18
7.3 Temperature, relative humidity . 18
8 Qualification of test rig and apparatus .19
8.1 Schedule of qualification testing requirements . 19
8.1.1 General . 19
8.1.2 Qualification testing . 19
8.1.3 Qualification documentation. 19
8.2 Qualification testing . 20
8.2.1 Test rig — Pressure system testing . 20
8.2.2 OPC — Air flow rate stability test . 21
8.2.3 OPC — Zero test . 21
8.2.4 OPC — Sizing accuracy . 21
8.2.5 OPC — Overload test .22
8.2.6 Aerosol generator — Response time . 22
8.2.7 Aerosol generator — Neutralizer . 23
8.2.8 Test rig — Air leakage test . 24
8.2.9 Test rig — Air velocity uniformity . 24
8.2.10 Test rig — Aerosol uniformity . 25
8.2.11 Test rig — Downstream mixing. 26
8.2.12 Test rig — Empty test device section pressure .28
8.2.13 Test rig — 100 % efficiency test and purge time .28
8.2.14 Test rig — Correlation ratio .29
8.3 Maintenance . 29
8.3.1 General .29
8.3.2 Test rig — Background counts .30
8.3.3 Test rig — Reference filter test .30
8.3.4 Test rig — Pressure reference test . 31
8.3.5 Test rig — Final filter resistance . 32
9 Test methods .32
9.1 Air flow rate . 32
9.2 Measurement of resistance to air flow . 32
9.3 Measurement of fractional efficiency . 32
9.3.1 Aerosol sampling protocol . 32
9.3.2 Background sampling . 32
9.3.3 Testing sequence for a single OPC . 33
9.3.4 Testing sequence for dual OPC . 37
10 Data reduction and calculations .38
10.1 Correlation ratio . .38
10.1.1 Correlation ratio general .38
10.1.2 Correlation ratio data reduction .39
10.2 Penetration and fractional efficiency .40
10.2.1 Penetration and fractional efficiency general .40
10.2.2 Penetration data reduction . 41
10.3 Data quality requirements . 43
10.3.1 Correlation background counts . 43
10.3.2 Efficiency background counts . 43
10.3.3 Correlation ratio . 43
10.3.4 Penetration .44
10.4 Fractional efficiency calculation . 45
11 Reporting results .45
11.1 General . 45
11.2 Required reporting elements . 45
11.2.1 Report general . 45
11.2.2 Report values . 45
11.2.3 Report summary .46
11.2.4 Report details . 47
iv
  © ISO 2022 – All rights reserved

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SIST EN ISO 16890-2:2022
ISO 16890-2:2022(E)
Annex A (informative) Example .50
Annex B (informative) Resistance to air flow calculation .57
Bibliography .59
v
© ISO 2022 – All rights reserved

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SIST EN ISO 16890-2:2022
ISO 16890-2:2022(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).
This second edition cancels and replaces the first edition (ISO 16890-2:2016), which has been
technically revised.
The main changes are as follows:
— definition of light scattering airborne particle counter (LSAPC) has been added in Clause 3;
— rewording of 6.3.1 and removal of 6.3.3 and 6.3.4 eliminating the matching crite
...

SLOVENSKI STANDARD
oSIST prEN ISO 16890-2:2020
01-julij-2020
Zračni filtri pri splošnem prezračevanju - 2. del: Merjenje frakcijske učinkovitosti in
odpornosti proti toku zraka (ISO/DIS 16890-2:2020)
Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow
resistance (ISO/DIS 16890-2:2020)
Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des
Fraktionsabscheidegrades und des Durchflusswiderstandes (ISO/DIS 16890-2:2020)
Filtres à air de ventilation générale - Partie 2: Mesurage de l'efficacité spectrale et de la
résistance à l'écoulement de l'air (ISO/DIS 16890-2:2020)
Ta slovenski standard je istoveten z: prEN ISO 16890-2
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
oSIST prEN ISO 16890-2:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 16890-2:2020

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oSIST prEN ISO 16890-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16890-2
ISO/TC 142 Secretariat: UNI
Voting begins on: Voting terminates on:
2020-06-09 2020-09-01
Air filters for general ventilation —
Part 2:
Measurement of fractional efficiency and air flow
resistance
Filtres à air de ventilation générale —
Partie 2: Mesurage de l'efficacité spectrale et de la résistance à l'écoulement de l'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
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 16890-2:2020(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 2020

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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)
Contents Page
Foreword . vi
Introduction . viii
Table 1 — Optical particle diameter size ranges for the definition of the efficiencies, ePM . viii
x
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Symbols and abbreviated terms .5
4.1 Symbols .5
4.2 Abbreviated terms .7
5 General test requirements .7
5.1 Test device requirements .7
5.2 Test device installation .7
5.3 Test rig requirements .7
6 Test materials .8
6.1 Liquid phase aerosol .8
6.1.1 DEHS test aerosol .8
6.1.2 DEHS/DES/DOS - formula .8
6.1.3 DEHS properties .8
6.1.4 Liquid phase aerosol generation .8
6.2 Solid phase aerosol .9
6.2.1 Potassium chloride (KCl) test aerosol .9
6.2.2 KCl - formula .9
6.2.3 KCl properties .9
6.2.4 Solid phase aerosol generation . 10
6.3 Reference aerosols . 11
6.3.1 Reference aerosol for 0,3 µm to 1,0 µm . 11
6.3.2 Reference aerosol for 1,0 µm to 10,0 µm . 11
6.3.3 Other reference aerosols . 11
6.3.4 Matching criteria . 11
6.4 Aerosol loading . 11
7 Test equipment . 11
7.1 Test rig . 11
7.1.1 Dimensions . 11
7.1.2 Construction materials . 12
7.1.3 Test rig shape . 12
7.1.4 Test rig air supply . 13
7.1.5 Test rig isolation . 13
7.1.6 D/S mixing orifice . 13
7.1.7 Aerosol sampling . 14
7.1.8 Test rig air flow rate measurement . 16
7.1.9 Resistance to air flow measurement . 16
7.1.10 Non 610 mm × 610 mm (24,0 inch × 24,0 inch) test devices . 17
7.1.11 Dust injection testing . 17
7.2 Aerosol particle counter . 18
7.2.1 General . 18
7.2.2 OPC sampled size range . 18
© ISO 2020 – All rights reserved
iii

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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)
7.2.3 OPC particle size ranges. 18
7.2.4 Sizing resolution . 19
7.2.5 Calibration . 19
7.2.6 Air flow rate . 19
7.2.7 Zero counting . 19
7.2.8 Dual OPC(s). 19
7.3 Temperature, relative humidity . 20
8 Qualification of test rig and apparatus . 20
8.1 Schedule of qualification testing requirements . 20
8.1.1 General . 20
8.1.2 Qualification testing . 20
8.1.3 Qualification documentation . 20
8.2 Qualification testing . 21
8.2.1 Test rig — Pressure system testing . 21
8.2.2 OPC — Air flow rate stability test . 22
8.2.3 OPC — Zero test . 23
8.2.4 OPC — Sizing accuracy . 23
8.2.5 OPC — Overload test . 23
8.2.6 Aerosol generator — Response time . 24
8.2.7 Aerosol generator — Neutralizer . 24
8.2.8 Test rig — Air leakage test . 25
8.2.9 Test rig — Air velocity uniformity . 26
8.2.10 Test rig — Aerosol uniformity . 27
8.2.11 Test rig — Downstream mixing . 28
8.2.12 Test rig — Empty test device section pressure . 29
8.2.13 Test rig — 100 % efficiency test and purge time . 30
8.2.14 Test rig — Correlation ratio . 30
8.3 Maintenance . 31
8.3.1 General . 31
8.3.2 Test rig — Background counts . 32
8.3.3 Test rig — Reference filter test . 32
8.3.4 Test rig — Pressure reference test . 33
8.3.5 Test rig — Final filter resistance . 33
9 Test methods . 33
9.1 Air flow rate . 33
9.2 Measurement of resistance to air flow . 33
9.3 Measurement of fractional efficiency . 33
9.3.1 Aerosol sampling protocol . 33
9.3.2 Background sampling . 34
9.3.3 Testing sequence for a single OPC . 34
9.3.4 Testing sequence for dual OPC testing . 36
10 Data reduction and calculations . 38
10.1 Correlation ratio . 38
10.1.1 Correlation ratio general . 38
10.1.2 Correlation ratio data reduction . 38
10.2 Penetration and fractional efficiency . 40
10.2.1 Penetration and fractional efficiency general . 40
10.2.2 Penetration data reduction . 40
10.3 Data quality requirements. 42
10.3.1 Correlation background counts . 42
10.3.2 Efficiency background counts . 43
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10.3.3 Correlation ratio . 43
10.3.4 Penetration . 44
10.4 Fractional efficiency calculation . 44
11 Reporting results . 45
11.1 General . 45
11.2 Required reporting elements . 45
11.2.1 Report general . 45
11.2.2 Report values . 45
11.2.3 Report summary . 45
11.2.4 Report details . 47
Annex A (informative) Example . 50
Annex B (informative) Resistance to air flow calculation . 57
Bibliography . 59

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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(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.
This second edition cancels and replaces the first edition (ISO 16890-2:2016), which has been technically
revised.
The main changes compared to the previous edition are as follows:
⎯ definition of light scattering airborne particle counter (LSAPC) is added in clause 3;
⎯ in 6.3.3 a sentence is added to better clarify that test devices with a media velocity above 20 cm/s
(39,4 ft/min) shall be tested with solid phase aerosol;
⎯ in figure 3, the distance between pressure drop taps and test device (7-8), wrongly indicated as 350
mm is modified into “≥350 mm”.
⎯ in 7.1.6 and in 8.3.3.4 a sentence is added to specify that the D/S mixing orifice shall not be installed
during resistance to airflow measurement;
⎯ aerosol particle counters (APC) and light scattering aerosol particle counter (LSAPC) were added in
7.2.1 as common examples of aerosol particle counter;
⎯ in 7.2.5 the wrong reference to ISO 21501-4 is corrected into ISO 21501-1;
⎯ in 10.3.2 “correlation” is changed into “efficiency” to be consistent with the title of the sub-clause
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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)
⎯ in 11.2.3 at 6)- iv) the word “additive” is changed into “adhesive” to be consistent with the template
of figure 11.
⎯ the example of test report in figure A.1 is updated to match the template report of figure 11;
A list of all parts in the ISO 16890 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.
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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)
Introduction
The effects of particulate matter (PM) on human health have been extensively studied in the past decades.
The results are that fine dust can be a serious health hazard, contributing to or even causing respiratory
and cardiovascular diseases. Different classes of particulate matter can be defined according to the
particle size range. The most important ones are PM , PM and PM . The U.S. Environmental Protection
10 2,5 1
Agency (EPA), the World Health Organization (WHO) and the European Union define PM as particulate
10
matter which passes through a size-selective inlet with a 50 % efficiency cut-off at 10 µm aerodynamic
diameter. PM and PM are similarly defined. However, this definition is not precise if there is no further
2,5 1
characterization of the sampling method and the sampling inlet with a clearly defined separation curve.
In Europe, the reference method for the sampling and measurement of PM is described in EN 12341.
10
The measurement principle is based on the collection on a filter of the PM10 fraction of ambient
particulate matter and the gravimetric mass determination (see EU Council Directive 1999/30/EC of 22
April 1999).
As the precise definition of PM , PM and PM is quite complex and not simple to measure, public
10 2,5 1
authorities, like the U.S. EPA or the German Federal Environmental Agency (Umweltbundesamt),
increasingly use in their publications the more simple denotation of PM as being the particle size
10
fraction less or equal to 10 µm. Since this deviation to the above mentioned complex “official” definition
does not have a significant impact on a filter element’s particle removal efficiency, the ISO 16890 series
refers to this simplified definition of PM , PM and PM .
10 2,5 1
Particulate matter in the context of the ISO 16890 series describes a size fraction of the natural aerosol
(liquid and solid particles) suspended in ambient air. The symbol ePM describes the efficiency of an air
x
cleaning device to particles with an optical diameter between 0,3 µm and x µm. The following particle
size ranges are used in the ISO 16890 series for the listed efficiency values.
Table 1 — Optical particle diameter size ranges for the definition of the efficiencies, ePM
x
Efficiency Size range, µm
ePM 0,3 ≤ × ≤10
10
ePM 0,3 ≤ × ≤2,5
2,5
ePM 0,3 ≤ × ≤1
1

Air filters for general ventilation are widely used in heating, ventilation and air-conditioning applications
of buildings. In this application, air filters significantly influence the indoor air quality and, hence, the
health of people, by reducing the concentration of particulate matter. To enable design engineers and
maintenance personnel to choose the correct filter types, there is an interest from international trade and
manufacturing for a well-defined, common method of testing and classifying air filters according to their
particle efficiencies, especially with respect to the removal of particulate matter. Current regional
standards are applying totally different testing and classification methods which do not allow any
comparison with each other, and thus hinder global trade with common products. Additionally, the
current industry standards have known limitations by generating results which often are far away from
filter performance in service, i.e. overstating the particle removal efficiency of many products. With this
new ISO 16890 series, a completely new approach for a classification system is adopted, which gives
better and more meaningful results compared to the existing standards.
The ISO 16890 series describes the equipment, materials, technical specifications, requirements,
qualifications and procedures to produce the laboratory performance data and efficiency classification
based upon the measured fractional efficiency converted into a particulate matter efficiency (ePM)
reporting system.
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oSIST prEN ISO 16890-2:2020
ISO/DIS 16890-2:2020(E)
Air filter elements according to the ISO 16890 series are evaluated in the laboratory by their ability to
remove aerosol particulate expressed as the efficiency values ePM , ePM and ePM . The air filter
1 2,5 10
elements can then be classified according to the procedures defined in ISO 16890-1. The particulate
removal efficiency of the filter element is measured as a function of the particle size in the range of 0,3 µm
to 10 µm of the unloaded and unconditioned filter element as per the procedures defined in this part of
ISO 16890. After the initial particulate removal efficiency testing, the air filter element is conditioned
according to the procedures defined in ISO 16890-4 and the particulate removal efficiency is repeated on
the conditioned filter element. This is done to provide information about the intensity of any electrostatic
removal mechanism which may or may not be present with the fi
...