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)

This International Standard refers to particulate air filters for general ventilation having an initial efficiency of less than 99 % with respect to 0,4 µm particles. Filters used in the ventilation of low-rise residential buildings or portable room-air cleaners are excluded from the scope of this standard. It describes the technical specifications, requirements and a method of test for the fractional efficiency measurement and resistance to airflow. The method is applicable for air flow rates between 0,25 m³/s (900 m³/h, 530 ft³/min) and 1,5 m³/s (5400 m³/h, 3178 ft³/min), referring to a test duct with a nominal face area of 0,61 m x 0,61 m. Filters in the higher end and above 99 % initial efficiency with respect to 0,4 µm particles are tested and classified according to other standards (see ISO 29463, part 1-5). Filters according to this series of standards are rated by their removal efficiency to PM10, PM2.5 and PM1 aerosol fractions. The particle collection efficiency of the filter element is measured as a function of the particle size in the range of 0,3 to 10 µm of the unloaded and unconditioned filter element. In a second step, a full filter element shall be conditioned (discharged) in an artificial aging step to provide information about the intensity of the electrostatic removal mechanism. The results from this second step are used to calculate the average efficiency in each of the PM10, PM2.5 and PM1 size ranges by weighting the fractional efficiency values according to the standardized and normalized particle size distribution of the related fraction of the ambient aerosol. This standardized and normalized particle size distribution is defined in this standard

Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des Franktionsabscheidegrades und des Durchflusswiderstandes (ISO 16890-2:2016)

Filtres à air pour ventilation générale - Partie 2: Mesurage du rendement fractionnaire et de la résistance à l'écoulement de l'air (ISO 16890-2:2016)

ISO 16890-2:2016 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 d'un filtre à air de ventilation générale.
Elle est destinée à être utilisée conjointement avec l'ISO 16890‑1, l'ISO 16890‑3 et l'ISO 16890‑4.
La méthode d'essai décrite dans la présente partie de l'ISO 16890 est applicable pour des débits d'air compris entre 0,25 m3/s (900 m3/h, 530 ft3/min) et 1,5 m3/s (5400 m3/h, 3178 ft3/min), en se référant à un banc d'essai ayant une surface frontale nominale de 610 mm x 610 mm (24 inch x 24 inch).
L'ISO 16890 (toutes les parties) concerne les éléments filtrants de 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 l'ISO 16890 (toutes les parties).
NOTE          Pour ce mode opératoire, la limite inférieure 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.
En dehors de ces fractions d'aérosol, les éléments filtrant sont évalués par d'autres méthodes d'essai applicables (voir l'ISO 29463 (toutes les parties)).
Les éléments filtrants utilisés dans les épurateurs d'air ambiant portatifs sont exclus du domaine d'application.
Les résultats de performance obtenus conformément à l'ISO 29463 (toutes les parties) ne peuvent pas être utilisés quantitativement pour prédire les performances en service, en ce qui concerne l'efficacité et la durée de vie.

Zračni filtri pri splošnem prezračevanju - 2. del: Merjenje frakcijske učinkovitosti in odpornosti proti toku zraka (ISO 16890-2:2016)

Ta evropski standard se uporablja za zračne filtre delcev za splošno prezračevanje, katerih začetna učinkovitost v zvezi z delci velikosti 0,4 μm je manj kot 99 %. Filtri, ki se uporabljajo pri prezračevanju nizkih stanovanjskih stavb ali premični čistilniki zraka v prostorih so izključeni s področja uporabe tega standarda. Opisuje tehnične specifikacije, zahteve in metodo preskušanja za merjenje frakcijske učinkovitosti in odpornosti proti toku zraka. Metoda je uporabna za tok zraka med 0,25 m³/s (900 m³/h, 530 ft³/min) in 1,5 m³/s (5400 m³/h, 3178 ft³/min) v preskusnih ceveh z nazivno površino 0,61 m x 0,61 m. Boljši filtri z začetno učinkovitostjo nad 99 % glede na delce velikosti 0,4 µm se preskušajo in razvrščajo v skladu z drugimi standardi (glej ISO 29463, del 1-5). Filtri v skladu s to serijo standardov se ocenjujejo po njihovi učinkovitosti odstranjevanja delcev aerosolov PM10, PM2.5 in PM1. Učinkovitost zbiranja delcev vložka filtra se meri kot funkcija velikosti delcev v razponu od 0,3 do 10 μm pri praznem in nekondicioniranem vložku filtra. V drugem koraku je treba polni vložek filtra kondicionirati (izprazniti) v koraku umetnega staranja, s čimer se zagotovijo informacije o intenzivnosti elektrostatičnega mehanizma odstranjevanja. Rezultati drugega koraka se uporabljajo za izračun povprečne učinkovitosti v razponih velikosti PM10, PM2.5 in PM1 s ponderiranjem vrednosti frakcijske učinkovitosti glede na porazdelitev standardizirane in normalizirane velikosti delcev povezane frakcije zunanjega aerosola. V tem standardu je določena ta porazdelitev standardizirane in normalizirane velikosti delcev.

General Information

• Status: Withdrawn
• Public Enquiry End Date: 29-Dec-2014
• Publication Date: 15-Jan-2017
• Withdrawal Date: 08-Sep-2022
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 08-Sep-2022
• Due Date: 01-Oct-2022
• Completion Date: 09-Sep-2022
• Ref Project: EN ISO 16890-2:2016 - Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow resistance (ISO 16890-2:2016)

Relations

• Replaced By: 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)
• Effective Date: 07-Sep-2022
• Replaces: SIST EN 779:2012 - Particulate air filters for general ventilation - Determination of the filtration performance
• Effective Date: 21-Dec-2016
• Replaces: SIST EN 779:2012 - Particulate air filters for general ventilation - Determination of the filtration performance
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16890-2:2017
01-marec-2017
1DGRPHãþD
SIST EN 779:2012
=UDþQLILOWULSULVSORãQHPSUH]UDþHYDQMXGHO0HUMHQMHIUDNFLMVNHXþLQNRYLWRVWLLQ
RGSRUQRVWLSURWLWRNX]UDND,62
Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow
resistance (ISO 16890-2:2016)
Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des
Franktionsabscheidegrades und des Durchflusswiderstandes (ISO 16890-2:2016)
Filtres à air pour ventilation générale - Partie 2: Mesurage du rendement fractionnaire et
de la résistance à l'écoulement de l'air (ISO 16890-2:2016)
Ta slovenski standard je istoveten z: EN ISO 16890-2:2016
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
SIST EN ISO 16890-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16890-2:2017

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SIST EN ISO 16890-2:2017


EN ISO 16890-2
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2016
EUROPÄISCHE NORM
ICS 91.140.30 Supersedes EN 779:2012
English Version

Air filters for general ventilation - Part 2: Measurement of
fractional efficiency and air flow resistance (ISO 16890-
2:2016)
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 Franktionsabscheidegrades und des
l'écoulement de l'air (ISO 16890-2:2016) Durchflusswiderstandes (ISO 16890-2:2016)
This European Standard was approved by CEN on 19 September 2016.

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, 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
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16890-2:2016 E
worldwide for CEN national Members.

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SIST EN ISO 16890-2:2017
EN ISO 16890-2:2016 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 16890-2:2017
EN ISO 16890-2:2016 (E)
European foreword
This document (EN ISO 16890-2:2016) has been prepared by Technical Committee ISO/TC 142
"Cleaning equipment for air and other gases" in collaboration with Technical Committee CEN/TC 195
“Air filters for general air cleaning” 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 June 2017, and conflicting national standards shall be
withdrawn at the latest by June 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 779:2012.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 16890-2:2016 has been approved by CEN as EN ISO 16890-2:2016 without any
modification.


3

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SIST EN ISO 16890-2:2017

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SIST EN ISO 16890-2:2017
INTERNATIONAL ISO
STANDARD 16890-2
First edition
2016-12-01
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
Reference number
ISO 16890-2:2016(E)
©
ISO 2016

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, 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. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
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 . 6
6 Test materials . 7
6.1 Liquid phase aerosol . 7
6.1.1 DEHS test aerosol . 7
6.1.2 DEHS/DES/DOS - formula . 7
6.1.3 DEHS properties . 7
6.1.4 Liquid phase aerosol generation . 7
6.2 Solid phase aerosol . 8
6.2.1 Potassium chloride (KCl) test aerosol . 8
6.2.2 KCl - formula . 8
6.2.3 KCl properties . 8
6.2.4 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
6.3.3 Other reference aerosols .10
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 .18
7.2 Aerosol particle counter .18
7.2.1 General.18
7.2.2 OPC sampled size range .18
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
© ISO 2016 – All rights reserved iii

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(E)

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 . . .22
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 .30
8.3.1 General.30
8.3.2 Test rig — Background counts .31
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 .33
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 .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 .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
iv © ISO 2016 – All rights reserved

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(E)

Bibliography .59
© ISO 2016 – All rights reserved v

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(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 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.
The committee responsible for this document is ISO/TC 142, Cleaning equipment for air and other gases.
This first edition of ISO 16890-2, together with ISO 16890-1, ISO 16890-3 and ISO 16890-4, cancels and
replaces ISO/TS 21220:2009, which has been technically revised.
ISO 16890 consists of the following parts, under the general title Air filters for general ventilation:
— Part 1: Technical specifications, requirements and classification system based upon particulate matter
efficiency (ePM)
— Part 2: Measurement of fractional efficiency and air flow resistance
— Part 3: Determination of the gravimetric efficiency and the air flow resistance versus the mass of test
dust captured
— Part 4: Conditioning method to determine the minimum fractional test efficiency
vi © ISO 2016 – All rights reserved

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SIST EN ISO 16890-2:2017
ISO 16890-2:2016(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
10 2,5 1
Protection Agency (EPA), the World Health Organization (WHO) and the European Union define
PM
...

SLOVENSKI STANDARD
oSIST prEN ISO 16890-2:2014
01-december-2014
=UDþQLILOWULSULVSORãQHPSUH]UDþHYDQMXGHO0HUMHQMHIUDNFLMVNHXþLQNRYLWRVWLLQ
RGSRUQRVWLSURWLWRNX]UDND
Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow
resistance
Luftfilter für die allgemeine Raumlufttechnik - Teil 2: Ermittlung des
Franktionsabscheidegrades und des Durchflusswiderstandes
Filtres à air pour ventilation générale - Partie 2: Mesurage du rendement fractionnaire et
de la résistance à l'écoulement de l'air
Ta slovenski standard je istoveten z: prEN ISO 16890-2
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
oSIST prEN ISO 16890-2:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 16890-2:2014

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oSIST prEN ISO 16890-2:2014
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16890-2
ISO/TC 142 Secretariat: UNI
Voting begins on: Voting terminates on:
2014-09-25 2015-02-25
Air filters for general ventilation —
Part 2:
Measurement of fractional efficiency and air flow
resistance
Filtres à air pour ventilation générale —
Partie 2: Mesurage du rendement fractionnaire et de la résistance à l’écoulement de l’air
ICS: 91.140.30
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
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 16890-2:2014(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 2014

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oSIST prEN ISO 16890-2:2014
ISO/DIS 16890-2:2014(E)

Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
electronic, photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
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Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2014 – All rights reserved

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oSIST prEN ISO 16890-2:2014

Contents Page
Foreword . v
Introduction . vi
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 . 6
5 General test requirements . 6
5.1 Test Device requirements . 6
5.2 Test Device Selection . 6
5.3 Test rig requirements . 7
6 Test materials . 7
6.1 Liquid phase aerosol . 7
6.1.1 DEHS test aerosol . 7
6.1.2 Liquid phase aerosol generation . 7
6.2 Solid phase aerosol . 8
6.2.1 Potassium chloride (KCl) test aerosol . 8
6.2.2 Solid phase aerosol generation . 8
6.3 Aerosol references . 9
6.3.1 Aerosol reference for 0,3 µm to 1,0 µm . 9
6.3.2 Aerosol reference for 1,0 µm to 10,0 µm . 9
6.3.3 Other aerosol references . 10
7 Test equipment . 10
7.1 Test rig . 10
7.1.1 Dimensions . 10
7.1.2 Construction materials . 11
7.1.3 Test rig shape . 11
7.1.4 Test rig air supply . 11
7.1.5 Test rig isolation . 11
7.1.6 D/S mixing orifice . 11
7.1.7 Aerosol Sampling . 12
7.1.8 Test rig Air Flow measurement . 14
7.1.9 Resistance to air flow measurement . 14
7.1.10 Non 610 x 610 mm (24 x 24 inch) test devices . 14
7.1.11 Dust injection testing . 15
7.2 Aerosol Particle Counter . 15
7.2.1 OPC sampled size range. 15
7.2.2 OPC particle size ranges . 15
7.2.3 Sizing Resolution . 16
7.2.4 Calibration . 16
7.2.5 Air flow rate . 16
7.2.6 Zero counting . 16
7.2.7 Dual OPC(s) . 16
7.3 Temperature, RH . 17
8 Qualification of test rig and apparatus . 17
8.1 Schedule of qualification testing requirements . 17
© ISO 2014 – All rights reserved iii

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oSIST prEN ISO 16890-2:2014
ISO/DIS 16890-2
8.1.1 Qualification testing . 17
8.1.2 Qualification documentation . 17
8.2 Qualification testing . 18
8.2.1 Test rig – Pressure system testing . 18
8.2.2 OPC – air flow rate stability test . 19
8.2.3 OPC – zero test . 19
8.2.4 OPC – sizing accuracy . 19
8.2.5 OPC – overload test . 20
8.2.6 Aerosol generator – response time . 20
8.2.7 Aerosol generator – neutralizer . 21
8.2.8 Test rig – air leakage test . 22
8.2.9 Test rig – air velocity uniformity . 22
8.2.10 Test rig – aerosol uniformity . 23
8.2.11 Test rig – downstream mixing . 24
8.2.12 Test rig – empty test device section pressure . 25
8.2.13 Test rig – 100% efficiency test and purge time . 26
8.2.14 Test rig – correlation ratio . 26
8.3 Maintenance items . 26
8.3.1 Test rig – background counts . 27
8.3.2 Test rig – reference filter test . 27
8.3.3 Test rig – pressure reference test . 28
8.3.4 Test rig – final filter resistance . 28
9 Test methods . 29
9.1 Air flow rate . 29
9.2 Measurement of resistance to air flow . 29
9.3 Measurement of fractional efficiency . 29
9.3.1 Aerosol sampling protocol . 29
9.3.2 Background sampling . 29
9.3.3 Testing sequence for a single OPC . 29
9.3.4 Test sequence for dual OPC testing . 31
10 Data reduction and calculations . 32
10.1 Correlation ratio . 32
10.1.1 Correlation ratio data reduction . 33
10.2 Penetration and fractional efficiency . 35
10.2.1 Penetration data reduction . 35
10.3 Data quality requirements . 37
10.3.1 Correlation background counts . 37
10.3.2 Efficiency background counts . 37
10.3.3 Correlation ratio . 38
10.3.4 Penetration . 38
10.4 Fractional efficiency calculation . 39
11 Reporting results . 39
11.1 General . 39
11.2 Required reporting elements . 39
11.2.1 Report values . 39
11.2.2 Report Summary . 40
11.2.3 Report Details . 40
Annex A (informative) Example . 44
Annex B (informative) Resistance to air flow calculation . 51
Bibliography . 53

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oSIST prEN ISO 16890-2:2014

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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 16890-2 was prepared by Technical Committee ISO/TC 142, Cleaning equipment for gas and other
gases.
ISO 16890 (all parts) replaces ISO/TS 21220:2009.
ISO 16890 consists of the following parts, under the general title Air filter for general ventilation:
 Part 1: Technical specifications, requirements and efficiency classification system based upon Particulate
Matter (PM)
 Part 2: Measurement of fractional efficiency and air flow resistance
 Part 3: Determination of the arrestance and the air flow resistance versus the mass of test dust captured
 Part 4: Conditioning method to determine the minimum fractional test efficiency
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oSIST prEN ISO 16890-2:2014
ISO/DIS 16890-2
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 Agency (EPA),
10 2,5 1
the World Health Organization (WHO) or the European Union define PM as particulate matter which passes
10
through a size-selective inlet with a 50% efficiency cut-off at 10 µm aerodynamic diameter. PM and PM are
2,5 1
similarly defined. However, this definition is not precise as long as there are no further definition 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 that described in EN 12341 “Air Quality – Field Test
10
Procedure to Demonstrate Reference Equivalence of Sampling Methods for the PM fraction of particulate
10
matter”. The measurement principle is based on the collection on a filter of the PM fraction of ambient
10
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 e.g. the US EPA or the German Federal Environmental Agency (Umweltbundesamt),
increasingly use in their publications the more simple denotation of PM as being the particle size fraction
10
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 elements particle removal efficiency as reported by ISO 16890, this simplified
definition of PM , PM and PM will be utilized within ISO 16890 documents.
10 2,5 1
Particulate Matter in the context of this standard describes a size fraction of the natural aerosol (liquid and
solid particles) suspended in ambient air, with the symbol PM where x defines the size range of the
x
aerodynamic diameter ≤ x µm. The following particle size fractions are used in this standard:
Fraction Size range
PM ≤ 10 µm
10
PM ≤ 2,5 µm
2,5
PM ≤ 1 µm
1

Air filters used for general ventilation are widely used in heating, ventilation and air-conditioning applications of
buildings. In this application they 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 properly 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 to each other, and hence,
hinder global trade with common products. Additionally, the current standards have known limitations and
generate results which are sometimes far away from filter performance in service. With this new international
standard, a completely new approach for a classification system is adopted, which gives better and more
meaningful results compared to the existing standards. Additionally, this new approach shall overcome major
concerns related to the former approach of ISO/TS 21220.
ISO 16890 (all parts) 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 (PM) reporting system.
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oSIST prEN ISO 16890-2:2014

Air filter elements according to this series of standards are evaluated in the laboratory by their ability to
remove aerosol particulate to PM , PM and PM aerosol fractions and then the air filter elements can be
1 2,5 10
classified per the procedures defined in part 1. The particulate removal efficiency of the filter element is
measured as a function of the particle size in the range of 0,3 to 10 µm of the unloaded and unconditioned
filter element per the procedures defined in part 2. The air filter element is then conditioned per the
procedures defined in part 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 filter element for test. The results from this second particle collection
efficiency step are used to shift the fractional efficiency curve of the filter element to be used to calculate the
average efficiency in each of the PM , PM and PM ranges by weighting the fractional efficiency values
1 2,5 10
according to the standardized and normalized particle size distribution of the related fraction of the ambient
aerosol.
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oSIST prEN ISO 16890-2:2014

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oSIST prEN ISO 16890-2:2014
DRAFT INTERNATIONAL STANDARD ISO/DIS 16890-2

Air filter for general ventilation — Part 2: Measurement of
fractional efficiency and air flow resistance
1 Scope
This part of ISO 16890 specifies the aerosol production, the test equipment and the test methods used for
measuring fractional efficiency and air flow resistance of air filter for general ventilation.
It is intended for use in conjunction with ISO 16890-1, ISO 16890-3 and ISO16890-4.
The test method described in this standard is applicable for air flow rates between 0,25 m³/s (900 m³/h,
530 ft³/min) and 1,5 m³/s (5400 m³/h, 3178 ft³/min), referring to a test rig with a nominal face area of 610 mm x
610 mm (24 inch x 24 inch).
ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an initial efficiency
less than or equal to 99% with respect to PM aerosol fraction and greater than 20% with respect to PM
1 10
aerosol fraction when tested per the procedures defined within parts 1-4 of ISO 16890.
Air filter elements outside of this aerosol fraction are evaluated by other applicable test methods, (see ISO
29463, part 1-5).
Filter elements used in portable room-air cleaners are excluded from the scope of this standard.
The performance results obtained in accordance with this series of standards cannot by themselves be
quantitatively applied to predict performance in service with regard to efficiency and lifetime.

2 Normative references
The following referenced documents are indispensable for the application 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 5167-1, Measurement of fluid flow by means of pressure differential devices - Part 1: Orifice plates,
nozzles and Venturi tubes inserted in circular cross-section conduits running full (ISO 5167-1:1991).
ISO 16890-1, Air filters for general ventilation — Part 1: Technical specifications, requirements and efficiency
classification system based upon Particulate Matter (PM) (Currently an ISO DIS)
ISO 16890-3, Air filters for general ventilation — Part 3: Determination of the gravimetric efficiency and the air
flow resistance versus the mass of test dust captured (Currently ISO CD)
ISO 16890-4, Air filters for general ventilation — Part 4: Conditioning method to determine the minimum
fractional test efficiency (Currently ISO CD)
ISO 14644-3, Metrology & Test Methods.
ISO 21501-4, Determination of particle size distribution – Single particle light-interaction methods - Part 4:
Light scattering airborne particle counter for clean spaces.
ISO 29463, High efficiency filters and filter media for removing particles from air
ISO 29494 Cleaning equipment for air and other gases – Terminology
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oSIST prEN ISO 16890-2:2014
ISO/DIS 16890-2
ISO 21501-1, Determination of particle size distribution - Single particle light interaction methods - Part 1:
Light scattering aerosol spectrometer

3 Terms and definitions
For the purposes of this document the terms and definitions given in ISO 29464 and the following apply:
3.1 Air flow and resistance

3.1.1
air flow rate
volume of air passing through the filter per unit time

[Source: ISO 29464:2011; 3.2.38]

3.1.2
nominal air flow rate
air flow rate specified by the manufacturer

3.1.3
resistance to airflow
difference in pressure between
...