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
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
09-Jan-2017
Due Date
16-Mar-2017
Completion Date
27-Jan-2017

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SIST EN ISO 16890-1:2017
01-marec-2017
1DGRPHãþD
SIST EN 779:2012

=UDþQLILOWULSULVSORãQHPSUH]UDþHYDQMXGHO7HKQLþQHVSHFLILNDFLMH]DKWHYHLQ

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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.

---------------------- Page: 1 ----------------------
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

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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.
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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. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
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
ISO 16890-1:2016(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 16890-1, 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

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

PM fraction of ambient particulate matter and the gravimetric mass determination (see EU Council

Directive 1999/30/EC of 22 April 1999).

As the precise definition of PM , PM and PM is quite complex and not simple to measure, public

10 2,5 1

authorities, like the U.S. EPA or the German Federal Environmental Agency (Umweltbundesamt),

increasingly use in their publications the more simple denotation of PM as being the particle size

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

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

Efficiency Size range, µm
ePM 0,3 ≤ × ≤10
ePM 0,3 ≤ × ≤2,5
2,5
ePM 0,3 ≤ × ≤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

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

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.

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

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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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(E)
3.1.1
arrestance
gravimetric efficiency

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

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

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

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
ISO 16890-1:2016(E)
3.4.1
air flow rate
volume of air passing through the filter per unit time
[SOURCE: ISO 29464:2011, 3.2.38]
3.4.2
nominal air flow rate
V,nom
air flow rate (3.4.1) specified by the manufacturer
3.4.3
test air flow rate
air flow rate (3.4.1) used for testing
3.5 Particulate matter
3.5.1
particulate matter
solid and/or liquid particles suspended in ambient air
3.5.2
particulate matter PM

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

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]
© ISO 2016 – All rights reserved 3
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SIST EN ISO 16890-1:2017
ISO 16890-1:2016(E)
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, %
d Lower limit particle diameter in a size range i, µm
d Upper limit particle diameter in a size range i, µm
i+1
Geometric mean diameter of a size range i, µm
Δd Width of a particle diameter size range i, µm

Δln d Logarithmic width of a particle diameter size range, i; ln is the natural logarithm to the

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

E Initial fractional efficiency of particle size range, i, of the untreated and unloaded filter

element, % (equals to the efficiency values E of the untreated filter element resulting

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

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, %
q (d) Discrete particle volume distribution, dimensionless
Q (d) Cumulative particle volume distribution, dimensionless
σ Standard deviation of the log-normal distribution
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
...

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