SIST EN ISO 16890-1:2017

Air filters for general ventilation - Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)

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 an efficiency classification system based upon fractional efficiency measurement and a Particulate Matter (PM) reporting system. 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 1: Technische Bestimmungen, Anforderungen und Effizienzklassifizierungssystem basierend auf Feinstaub (PM) (ISO 16890-1:2016)

Dieser Teil der ISO 16890 konstatiert ein Effizienzklassifizierungssystem für Luftfilter für die allgemeine Raumlufttechnik basierend auf Feinstaub (PM). Es bietet zudem einen Überblick über die Prüfverfahren und legt die allgemeinen Anforderungen für die Bewertung und Kennzeichnung der Filter sowie die Dokumentation der Prüfergebnisse fest. Er ist für die Anwendung in Verbindung mit ISO 16890 2, 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 Abscheidegrad ePM1 von weniger oder gleich 99 % bei Prüfung nach den in ISO 16890 1, ISO 16890 2, ISO 16890 3 und ISO 16890 4 festgelegten Verfahren. Luftfilterelemente mit einem höheren Anfangsabscheidegrad werden durch andere anzuwendende Prüfverfahren (siehe ISO 29463-1, ISO 29463-2, ISO 29463-3, ISO 29463-4 und ISO 29463-5) bewertet.
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. In Anhang A sind andere die Leistung beeinflussende Faktoren beschrieben, die ebenfalls berücksichtigt werden müssen.

Filtres à air pour ventilation générale - Partie 1: Spécifications techniques, exigences et système de classification du rendement fondé sur les particules en suspension (PM) (ISO 16890-1:2016)

Zračni filtri pri splošnem prezračevanju - 1. del: Tehnične specifikacije, zahteve in klasifikacijski sistem učinkovitosti na podlagi drobnih delcev (ePM) (ISO 16890-1:2016)

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 sistem razvrščanja učinkovitosti na podlagi merjenja frakcijske učinkovitosti in sistema poročanja o trdnih delcih (PM). 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: Published
• Public Enquiry End Date: 29-Dec-2014
• Publication Date: 26-Jan-2017
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Jan-2017
• Due Date: 16-Mar-2017
• Completion Date: 27-Jan-2017
• Ref Project: EN ISO 16890-1:2016 - Air filters for general ventilation - Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)

Relations

• Revised: SIST EN 779:2012 - Particulate air filters for general ventilation - Determination of the filtration performance
• Effective Date: 06-Jul-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 16890-1:2017
01-marec-2017
1DGRPHãþD
SIST EN 779:2012
=UDþQLILOWULSULVSORãQHPSUH]UDþHYDQMXGHO7HKQLþQHVSHFLILNDFLMH]DKWHYHLQ
NODVLILNDFLMVNLVLVWHPXþLQNRYLWRVWLQDSRGODJLGUREQLKGHOFHYH30,62

Air filters for general ventilation - Part 1: Technical specifications, requirements and
classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)
Luftfilter für die allgemeine Raumlufttechnik - Teil 1: Technische Bestimmungen,
Anforderungen und Effizienzklassifizierungssystem basierend auf Feinstaub (PM) (ISO
16890-1:2016)
Filtres à air pour ventilation générale - Partie 1: Spécifications techniques, exigences et
système de classification du rendement fondé sur les particules en suspension (PM)
(ISO 16890-1:2016)
Ta slovenski standard je istoveten z: EN ISO 16890-1:2016
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
SIST EN ISO 16890-1:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16890-1:2017

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SIST EN ISO 16890-1:2017


EN ISO 16890-1
EUROPEAN STANDARD

NORME EUROPÉENNE

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

Air filters for general ventilation - Part 1: Technical
specifications, requirements and classification system
based upon particulate matter efficiency (ePM) (ISO
16890-1:2016)
Filtres à air de ventilation générale - Partie 1: Luftfilter für die allgemeine Raumlufttechnik - Teil 1:
Spécifications techniques, exigences et système de Technische Bestimmungen, Anforderungen und
classification fondé sur l'efficacité des particules en Effizienzklassifizierungssystem basierend auf
suspension (ePM) (ISO 16890-1:2016) Feinstaub (PM) (ISO 16890-1:2016)
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 16890-1:2016 E
worldwide for CEN national Members.

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SIST EN ISO 16890-1:2017
EN ISO 16890-1:2016 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 16890-1:2017
EN ISO 16890-1:2016 (E)
European foreword
This document (EN ISO 16890-1:2016) 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 16890-1:2016 has been approved by CEN as EN ISO 16890-1:2016 without any
modification.


3

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SIST EN ISO 16890-1:2017

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SIST EN ISO 16890-1:2017
INTERNATIONAL ISO
STANDARD 16890-1
First edition
2016-12-01
Air filters for general ventilation —
Part 1:
Technical specifications, requirements
and classification system based upon
particulate matter efficiency (ePM)
Filtres à air de ventilation générale —
Partie 1: Spécifications techniques, exigences et système de
classification fondé sur l’efficacité des particules en suspension (ePM)
Reference number
ISO 16890-1:2016(E)
©
ISO 2016

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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(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 16890-1:2017
ISO 16890-1:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 4
5 Technical specifications and requirements . 5
5.1 General . 5
5.2 Material . 5
5.3 Nominal air flow rate . 5
5.4 Resistance to air flow . 5
5.5 Fractional efficiency curves (particle size efficiency spectrum) . 5
5.6 Arrestance . 5
6 Test methods and procedure . 6
7 Classification system based on particulate matter efficiency (ePM) .6
7.1 Definition of a standardized particles size distribution of ambient air . 6
7.2 Calculation of the particulate matter efficiencies (ePM) . 9
7.3 Classification . 9
8 Reporting .10
8.1 General .10
8.2 Interpretation of test reports .11
8.3 Summary .12
Annex A (informative) Shedding from filters .17
Annex B (informative) Examples .19
Annex C (informative) Estimation of downstream fine dust concentrations .23
Bibliography .26
© ISO 2016 – All rights reserved iii

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SIST EN ISO 16890-1:2017
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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 16890-1, together with ISO 16890-2, 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
iv © ISO 2016 – All rights reserved

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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(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 as particulate matter which passes through a size-selective inlet with a 50 % efficiency cut-off
10
at 10 µm aerodynamic diameter. PM and PM are similarly defined. However, this definition is not
2,5 1
precise if there is no further 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. The measurement principle is based on the collection on a filter of the
10
PM fraction of ambient particulate matter and the gravimetric mass determination (see EU Council
10
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.
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
1 2,5 10
filter elements can then be classified according to the procedures defined in this part of ISO 16890.
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 ISO 16890-2. After the initial particulate removal efficiency testing, the air filter element is
© ISO 2016 – All rights reserved v

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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(E)

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 filter element for test.
The average efficiency of the filter is determined by calculating the mean between the initial efficiency
and the conditioned efficiency for each size range. The average efficiency is used to calculate the ePM
x
efficiencies by weighting these values to the standardized and normalized particle size distribution of
the related ambient aerosol fraction. When comparing filters tested in accordance with the ISO 16890
series, the fractional efficiency values shall always be compared among the same ePM class (ex. ePM
x 1
of filter A with ePM of filter B). The test dust capacity and the initial arrestance of a filter element are
1
determined as per the test procedures defined in ISO 16890-3.
vi © ISO 2016 – All rights reserved

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SIST EN ISO 16890-1:2017
INTERNATIONAL STANDARD ISO 16890-1:2016(E)
Air filters for general ventilation —
Part 1:
Technical specifications, requirements and classification
system based upon particulate matter efficiency (ePM)
1 Scope
This part of ISO 16890 establishes an efficiency classification system of air filters for general ventilation
based upon particulate matter (PM). It also provides an overview of the test procedures, and specifies
general requirements for assessing and marking the filters, as well as for documenting the test results.
It is intended for use in conjunction with ISO 16890-2, ISO 16890-3 and ISO 16890-4.
3
The test method described in this part of ISO 16890 is applicable for air flow rates between 0,25 m /s
3 3 3 3 3
(900 m /h, 530 ft /min) and 1,5 m /s (5 400 m /h, 3 178 ft /min), referring to a test rig with a nominal
face area of 610 mm × 610 mm (24 inch × 24 inch).
ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an
ePM efficiency less than or equal to 99 % when tested according to the procedures defined within
1
ISO 16890-1, ISO 16890-2, ISO 16890-3 and ISO 16890-4. Air filter elements with a higher initial
efficiency are evaluated by other applicable test methods (see ISO 29463-1, ISO 29463-2, ISO 29463-3,
ISO 29463-4 and ISO 29463-5).
Filter elements used in portable room-air cleaners are excluded from the scope of this part of ISO 16890.
The performance results obtained in accordance with ISO 16890 (all parts) cannot by themselves be
quantitatively applied to predict performance in service with regard to efficiency and lifetime. Other
factors influencing performance to be taken into account are described in Annex A.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 15957, Test dusts for evaluating air cleaning equipment
ISO 16890-2, Air filter for general ventilation — Part 2: Measurement of fractional efficiency and air flow
resistance
ISO 16890-3, Air filter for general ventilation — Part 3: Determination of the gravimetric efficiency and the
air flow resistance versus the mass of test dust captured
ISO 16890-4, Air filter for general ventilation — Part 4: Conditioning method to determine the minimum
fractional test efficiency
ISO 29464:2011, Cleaning equipment for air and other gases — Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 29464 and the following apply.
3.1 Arrestance and efficiency
© ISO 2016 – All rights reserved 1

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3.1.1
arrestance
gravimetric efficiency
A
measure of the ability of a filter to remove mass of a standard test dust from the air passing through it,
under given operating conditions
Note 1 to entry: This measure is expressed as a weight percentage.
3.1.2
initial arrestance
initial gravimetric efficiency
A
i
ratio of the mass of a standard test dust retained by the filter to the mass of dust fed after the first
loading cycle in a filter test
Note 1 to entry: This measure is expressed as a weight percentage.
3.1.3
average arrestance
average gravimetric efficiency
A
m
ratio of the total mass of a standard test dust retained by the filter to the total mass of dust fed up to
final test pressure differential
3.1.4
efficiency
fraction or percentage of a challenge contaminant that is removed by a filter
3.1.5
fractional efficiency
ability of an air cleaning device to remove particles of a specific size or size range
Note 1 to entry: The efficiency plotted as a function of particle size (3.7.1) gives the particle size efficiency
spectrum.
[SOURCE: ISO 29464:2011, 3.1.61]
3.1.6
particulate matter efficiency
ePM
x
efficiency (3.1.4) of an air cleaning device to reduce the mass concentration of particles with an optical
diameter between 0,3 µm and x µm
3.2
filter element
structure made of the filtering material, its supports and its interfaces with the filter housing
3.3
group designation
designation of a group of filters fulfilling certain requirements in the filter classification
Note 1 to entry: This part of ISO 16890 defines four groups of filters. Group designations are “ISO coarse”, “ISO
ePM10”, “ISO ePM2,5” and “ISO ePM1” as defined in Table 4.
3.4 Air flow rates
2 © ISO 2016 – All rights reserved

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SIST EN ISO 16890-1:2017
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3.4.1
air flow rate
q
V
volume of air passing through the filter per unit time
[SOURCE: ISO 29464:2011, 3.2.38]
3.4.2
nominal air flow rate
q
V,nom
air flow rate (3.4.1) specified by the manufacturer
3.4.3
test air flow rate
q
Vt
air flow rate (3.4.1) used for testing
3.5 Particulate matter
3.5.1
particulate matter
PM
solid and/or liquid particles suspended in ambient air
3.5.2
particulate matter PM
10
particulate matter (3.5.1) which passes through a size-selective inlet with a 50 % efficiency cut-off at
10 μm aerodynamic diameter
3.5.3
particulate matter PM
2,5
particulate matter (3.5.1) which passes through a size-selective inlet with a 50 % efficiency cut-off at
2,5 μm aerodynamic diameter
3.5.4
particulate matter PM
1
particulate matter (3.5.1) which passes through a size-selective inlet with a 50 % efficiency cut-off at
1 μm aerodynamic diameter
3.6
particle counter
device for detecting and counting numbers of discrete airborne particles present in a sample of air
[SOURCE: ISO 29464:2011, 3.27]
3.7 Particle size and diameter
3.7.1
particle size
particle diameter
geometric diameter (equivalent spherical, optical or aerodynamic, depending on context) of the
particles of an aerosol
[SOURCE: ISO 29464:2011, 3.1.126]
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3.7.2
particle size distribution
presentation, in the form of tables of numbers or of graphs, of the experimental results obtained using a
method or an apparatus capable of measuring the equivalent diameter of particles in a sample or capable
of giving the proportion of particles for which the equivalent diameter lies between defined limits
[SOURCE: ISO 29464:2011, 3.1.128]
3.8
resistance to air flow
pressure differential
difference in pressure between two points in an airflow system at specified conditions, especially when
measured across the filter element (3.2)
3.9
test dust capacity
amount of a standard test dust held by the filter at final test pressure differential
4 Symbols and abbreviated terms
A Initial arrestance, %
i
d Lower limit particle diameter in a size range i, µm
i
d Upper limit particle diameter in a size range i, µm
i+1
Geometric mean diameter of a size range i, µm
d
i
Δd Width of a particle diameter size range i, µm
i
Δln d Logarithmic width of a particle diameter size range, i; ln is the natural logarithm to the
i
base of e, where e is an irrational and transcendental constant approximately equal to
2,718 281 828
Δlndd=−ln lndd= ln(/ d ) , dimensionless
ii++11ii i
d Median particle size of the log-normal distribution, µm
50
E Initial fractional efficiency of particle size range, i, of the untreated and unloaded filter
i
element, % (equals to the efficiency values E of the untreated filter element resulting
ps
from ISO 16890-2)
E Fractional efficiency of particle size range, i, of the filter element after an artificial
D,i
conditioning step, % (equals to the efficiency values E of the filter element resulting
ps
from ISO 16890-2 after a conditioning step has been carried out according to
ISO 16890-4)
E Average fractional efficiency of particle size range i, %
A,i
ePM Minimum efficiency value with x=1 µm, 2,5 µm or 10 µm of the conditioned filter
x, min
element, %
ePM Efficiency with x=1 µm, 2,5 µm or 10 µm, %
x
q (d) Discrete particle volume distribution, dimensionless
3
Q (d) Cumulative particle volume distribution, dimensionless
3
σ Standard deviation of the log-normal distribution
g
4 © ISO 2016 – All rights reserved

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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(E)

y Mixing ratio of the bimodal particle size distribution
ASHRAE American Society of Heating Refrigeration and Air Conditioning Engineers
CEN European Committee for Standardization
5 Technical specifications and requirements
5.1 General
The filter element shall be designed or marked for air flow direction in a way that prevents incorrect
mounting.
The filter shall be designed in a way that no leaks occur along the sealing edge when correctly mounted
in the ventilation duct. If, for any reason, dimensions do not allow testing of a filter under standard test
conditions, assembly of two or more filters of the same type or model are permitted, provided no leaks
occur in the resulting filter configuration.
5.2 Material
The filter element shall be made of suitable material to withstand normal usage and exposures to those
temper
...

SLOVENSKI STANDARD
oSIST prEN ISO 16890-1:2014
01-december-2014
=UDþQLILOWULSULVSORãQHPSUH]UDþHYDQMXGHO7HKQLþQHVSHFLILNDFLMH]DKWHYHLQ
NODVLILNDFLMVNLVLVWHPXþLQNRYLWRVWLQDSRGODJLGUREQLKGHOFHY30,62',6

Air filters for general ventilation - Part 1: Technical specifications, requirements and
efficiency classification system based upon Particulate Matter (PM) (ISO/DIS 16890-
1:2014)
Luftfilter für die allgemeine Raumlufttechnik - Teil 1: Technische Bestimmungen,
Anforderungen und Effizienzklassifizierungssystem basierend auf Feinstaub (PM)
(ISO/DIS 16890-1:2014)
Filtres à air pour ventilation générale - Partie 1: Spécifications techniques, exigences et
système de classification du rendement fondé sur les particules en suspension (PM)
(ISO/DIS 16890-1:2014)
Ta slovenski standard je istoveten z: prEN ISO 16890-1
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
oSIST prEN ISO 16890-1:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 16890-1:2014

---------------------- Page: 2 ----------------------
oSIST prEN ISO 16890-1:2014
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16890-1
ISO/TC 142 Secretariat: UNI
Voting begins on: Voting terminates on:
2014-10-09 2015-03-09
Air filters for general ventilation —
Part 1:
Technical specifications, requirements and efficiency
classification system based upon Particulate Matter (PM)
Filtres à air pour ventilation générale —
Partie 1: Spécifications techniques, exigences et système de classification du rendement fondé sur les
particules en suspension (PM)
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 16890-1:2014(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 16890-1:2014
ISO/DIS 16890-1:2014(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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
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 16890-1:2014
ISO/DIS 16890-1:2014(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 4
5 Technical specifications and requirements . 5
5.1 General . 5
5.2 Material . 5
5.3 Nominal air flow rate . 5
5.4 Resistance to air flow . 5
5.5 Fractional efficiency curves (Particle size efficiency spectrum) . 5
5.6 Gravimetric arrestance . 5
6 Test methods and procedure . 5
7 Classification system based on Particulate Matter (PM) . 6
7.1 Definition of a standardised particles size distribution of ambient air . 6
7.2 Calculation of the PM-efficiencies . 8
7.3 Classification . 8
8 Reporting . 9
8.1 General . 9
8.2 Interpretation of test reports .10
8.3 Summary .10
Annex A (informative) Shedding from filters .15
Annex B (informative) Example .17
Annex C (informative) Ambient aerosol particle size distribution .20
Annex D (informative) Estimation of downstream fine dust concentrations .22
Bibliography .24
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oSIST prEN ISO 16890-1:2014
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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 16890-1 was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other
gases.
ISO 16890 (all parts) replaces ISO/TS 21220:2009.
ISO 16890 consists of the following parts, under the general title Air filters 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
iv © ISO 2014 – All rights reserved

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oSIST prEN ISO 16890-1:2014
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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 US. Environmental
10 2,5 1
Protection Agency (EPA), the World Health Organization (WHO) or the European Union define PM as
10
particulate 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 as
2,5 1
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
10
that described in EN 12341 “Air Quality — Field Test Procedure to Demonstrate Reference Equivalence
of Sampling Methods for the PM fraction of particulate matter”. The measurement principle is based
10
on the collection on a filter of the PM fraction of ambient particulate matter and the gravimetric mass
10
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
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 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.
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
1 2,5 10
can be 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
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oSIST prEN ISO 16890-1:2014
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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
1 2,5 10
by weighting the fractional efficiency values according to the standardized and normalized particle size
distribution of the related fraction of the ambient aerosol.
vi © ISO 2014 – All rights reserved

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oSIST prEN ISO 16890-1:2014
DRAFT INTERNATIONAL STANDARD ISO/DIS 16890-1:2014(E)
Air filters for general ventilation —
Part 1:
Technical specifications, requirements and efficiency
classification system based upon Particulate Matter (PM)
1 Scope
This part of ISO 16890 establishes an efficiency classification system of air filters for general ventilation
based upon Particulate Matter (PM). It also provides an overview of the test procedures, and specifies
general requirements for assessing and marking the filters, as well as for documenting the test results.
It is intended for use in conjunction with ISO 16890-2, ISO 16890-3 and ISO 16890-4.
3 3
The test method described in this standard is applicable for air flow rates between 0,25 m /s (900 m /h,
3 3 3 3
530 ft /min) and 1,5 m /s (5 400 m /h, 3 178 ft /min), referring to a test rig with a nominal face area of
610 mm × 610 mm (24 inch × 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
1
respect to PM aerosol fraction when tested per the procedures defined within parts 1-4 of ISO 16890.
10
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 shall not by themselves
be quantitatively applied to predict performance in service with regard to efficiency and lifetime. Other
factors influencing performance to be taken into account are described in Annex A (informative).
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 16890-2, Air filter for general ventilation – Part 2: Measurement of fractional efficiency and air flow
resistance
ISO 16890-3, Air filter for general ventilation – Part 3: Determination of the arrestance and the air flow
resistance versus the mass of test dust captured
ISO 16890-4, Air filter for general ventilation – Part 4: Conditioning method to determine the minimum
fractional test efficiency
ISO 15957, Air filter for general ventilation — Challenge contaminants for testing air cleaning equipment
ISO 29463, High-efficiency filters and filter media for removing particles in air
ISO 29464:2011, Cleaning equipment for air and other gases — Terminology
EN 12341:1999, Air quality. Determination of the PM10 fraction of suspended particulate matter. Reference
method and field test procedure to demonstrate reference equivalence of measurement methods
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 29464 and the following apply:
3.1 Arrestance and efficiency
3.1.1
gravimetric arrestance
measure of the ability of a filter to remove a standard test dust from the air passing through it, under
given operating conditions
Note 1 to entry: This measure is expressed as a weight percentage
3.1.2
initial gravimetric arrestance
value of arrestance determined after the first loading cycle in a filter test
Note 1 to entry: This measure is expressed as a weight percentage
3.1.3
average gravimetric arrestance
ratio of the total amount of loading dust retained by the filter to the total amount of dust fed up to final
test pressure differential
3.1.4
efficiency
fraction or percentage of a challenge contaminant that is removed by a filter
3.1.5
fractional efficiency
ability of an air cleaning device to remove particles of a specific size or size range
Note 1 to entry: The efficiency plotted as a function of particle size gives the particle size efficiency spectrum
[SOURCE: ISO 29464:2011; 3.1.61]
3.2
filter element
structure made of the filtering material, its supports and its interfaces with the filter housing
3.3 Air flow rates
3.3.1
air flow rate
q
v
volume of air passing through the filter per unit time
[SOURCE: ISO 29464:2011; 3.2.38]
3.3.2
nominal air flow rate
q
v,nom
air flow rate specified by the manufacturer
3.3.3
test air flow rate
q
vt
air flow rate used for testing

2 © ISO 2014 – All rights reserved

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3.4 Particulate matter
3.4.1
particulate matter
PM
solid or liquid particles suspended in ambient air
3.4.2
particulate matter smaller 10 µm
PM
10
size fraction of particulate matter having an aerodynamic diameter less than or equal to a nominal 10
micrometres
3.4.3
particulate matter smaller 2,5 µm
PM
2,5
size fraction of particulate matter having an aerodynamic diameter less than or equal to a nominal 2,5
micrometres
3.4.5
particulate matter smaller 1 µm
PM
1
size fraction of particulate matter having an aerodynamic diameter less than or equal to a nominal 1
micrometres
3.4.6
PM-efficiencies
efficiencies of an air filter to reduce the mass concentration of the three PM dust fractions. PM -
10
efficiency is the efficiency to the PM fraction, PM -efficiency to the PM fraction and PM -efficiency
10 2,5 2,5 1
to the PM fraction. PM-efficiency is calculated as the ratio of the difference of the PM mass concentration
1
upstream and downstream of the filter to the upstream concentration
3.5
particle counter
device for detecting and counting numbers of discrete airborne particles present in a sample of air
[SOURCE: ISO 29464:2011; 3.1.27]
3.6 Particle size and diameter
3.6.1
particle size
particle diameter
geometric diameter (equivalent spherical, optical or aerodynamic, depending on context) of the particles
of an aerosol
[SOURCE: ISO 29464:2011; 3.1.126]
3.6.2
particle size distribution
presentation, in the form of tables of numbers or of graphs, of the experimental results obtained using a
method or an apparatus capable of measuring the equivalent diameter of particles in a sample or capable
of giving the proportion of particles for which the equivalent diameter lies between defined limits
[SOURCE: ISO 29464:2011; 3.1.128]
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3.7
pressure differential
resistance to air flow
difference in pressure between two points in an airflow system at specified conditions, especially when
measured across the filter element
3.8
test dust capacity
TDC
amount of loading dust held by the filter at final test pressure differential
[SOURCE: ISO 29464:2011; 3.1.52]
4 Symbols and abbreviated terms
For the application of this Standard, the following symbols and abbreviated terms apply:
A Initial gravimetric arrestance
i
d Lower limit particle diameter in a size range i, µm
i
d Upper limit particle diameter in a size range i, µm
i+1
Geometric mean diameter of a size range i, µm
d
i
Δd Width of a particle diameter size range i, µm
i
Δln d Logarithmic width of a particle diameter size range i; ln is the natural logarithm to the
i
base of e, where e is an irrational and transcendental constant approximately equal to
2,718 281 828 Δln d = ln d − ln d = ln(d /d ), dimensionless
i i+1 i i+1 i
d median particle size of the log-normal distribution, µm
50
E Initial fractional efficiency of particle size range i of the untreated and unloaded filter
i
element, %
E Fractional efficiency of particle size range i of the filter element after an artificial condi-
D,i
tioning step, %
E Average fractional efficiency of particle size range i, %
A,i
E (PM ) Minimum average PM -efficiency with x = 1 µm, 2,5 µm or 10 µm of the conditioned filter
min x x
element, %
E(PM ) PM -efficiency with x = 1 µm, 2,5 µm or 10 µm, %
x x
q (d) Discrete particle volume distribution, dimensionless
3
Q (d) Cumulative particle volume distribution, dimensionless
3
σ Standard deviation of the log-normal distribution
g
y Mixing ratio of the bimodal particle size distribution
4 © ISO 2014 – All rights reserved

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oSIST prEN ISO 16890-1:2014
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5 Technical specifications and requirements
5.1 General
The filter element shall be designed or marked for air flow direction in a way preventing incorrect
mounting.
The filter shall be designed in a way that no leaks occur along the sealing edge when correctly mounted
in the ventilation duct. If, for any reason, dimensions do not allow testing of a filter under standard test
conditions, assembly of two or more filters of the same type or model are permitted, provided no leaks
occur in the resulting filter configuration.
5.2 Material
The filter element shall be made of suitable material to withstand normal usage and exposures to those
temperatures, humidities and corrosive environments that are likely to be encountered.
The filter element shall be designed to withstand mechanical constraints that are likely to occur during
normal use.
5.3 Nominal air flow rate
The filter element shall be tested at its nominal air flow rate for which the filter has been designed by
the manufacturer.
3 3 3
However, many national and association bodies use 0,944 m /s (2 000 ft /min or 3 400 m /h) as nominal
air flow for classification or rating of air filters that are nominal 610 mm × 610 mm (24 inch × 24 inch)
in face area. Therefore, if the manufacturer does not specify a nominal air flow rate, the filter shall be
3
tested at 0,944 m /s. The air flow velocity associated with this air flow rate is 2,54 m/s (500 ft/min).
5.4 Resistance to air flow
The resistance to air flow (pressure differential) across the filter element is recorded at the test air flow
rate as described in detail in ISO 16890-2.
5.5 Fractional efficiency curves (Particle size efficiency spectrum)
The initial fractional efficiency curve E of the unloaded and unconditioned filter element as a function
i
of the particle size is measured at the test air flow rate in accordance with ISO 16890-2.
The fractional efficiency curve E of the filter element after an artificial conditioning step defined in
D,i
ISO 16890-4 is determined as a function of the particle size in accordance with ISO 16890-2.
5.6 Gravimetric arrestance
The initial gravimetric arrestance, the resistance to air flow versus the mass of test dust captured and
the test dust capacity are determined in accordance with ISO 16890-3.
6 Test methods and procedure
The technical specifications of the test rig(s), the related test conditions, test aerosols and test dust used
for this standard are described in detail in ISO 16890-2, ISO 16890-3 and ISO 16890-4. The full test
according to this standard consists of the steps given below, which all shall be carried out with the same
filter test specimen under the same test conditions and at the same test air flow rate:
a) Measure the initial fractional efficiency curve E of the unloaded and unconditioned filter element
i
as a function of the particle size in accordance with ISO 16890-2;
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oSIST prEN ISO 16890-1:2014
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b) Carry out an artificial conditioning step in accordance with ISO 16890-4;
c) Measure the fractional efficiency curve E of the conditioned filter element as a function of the
D,i
particle size in accordance with ISO 16890-2;
d) Calculate the PM efficiencies as defined in clause 7;
e) Load the filter with synthetic test dust in accordance with ISO 16890-3 to determine the initial
gravimetric arrestance, the resistance to air flow versus the mass of test dust captured and the test
dust capacity (optional for filters of group PM or higher);
10
f) Measure the fractional efficiency curve of the conditioned filter element after dust loading as a
function of the particle size in accordance with ISO 16890-2;
The initial fractional efficiency curve E of the untreated and unloaded filter element (see 5.5) and the
i
fractional efficiency curves E after an artificial conditioning step are used to calculate the average
D,i
fractional efficiency curve E using Equation (1).
A,i
E = 0,5 · (E + E )
A,i i D,i
(1)
Note Many types of air filter rely to different extends on the effects of passive electrostatic charges on the
fibres to achieve high efficiencies, particularly in the initial stages of their working life, at low resistance to air
flow. Exposure to some types of challenge, such as combustion particles, fine particles or oil m
...