IEC TS 63086-2-5:2026

IEC TS 63086-2-5
Edition 1.0 2026-08
TECHNICAL
SPECIFICATION
Household and similar electrical air cleaning appliances - Methods for
measuring the performance -
Part 2-5: Particular requirements for determination of the performance change
by loading with particles
ICS 23.120; 97.080   ISBN 978-2-8327-1424-9

IEC TS 63086-2-5: 2026-08(en)
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CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviated terms . 5
3.1 Terms and definitions . 5
3.2 Abbreviated terms. 6
4 Test equipment and measurement instruments . 6
4.1 Test aerosol generation . 6
4.2 Loading aerosol generation. 6
4.3 Instrumentation for CADR measurements . 6
4.4 Balance for weighing . 6
5 Determination of the cumulative clean mass . 6
5.1 General . 6
5.2 Choice of the loading aerosol . 7
5.2.1 General. 7
5.2.2 Salt . 7
5.2.3 Dust . 7
5.2.4 Cigarette smoke. 7
5.2.5 Di-ethyl-hexyl-sebacate (DEHS) . 7
5.2.6 Defined mixtures of loading aerosols. 8
5.3 Measurement of the natural decay rate . 8
5.4 Measurement of the initial total decay rate . 8
5.5 Calculation of the initial CADR . 8
5.6 First loading step . 8
5.7 Measurement of the total decay rate after loading . 9
5.8 Calculation of the CADR after loading . 9
5.9 Calculation of the CCM . 9
5.10 Calculation of the mass for the next loading step . 10
5.11 Next loading step . 11
6 Loading procedures . 12
6.1 General . 12
6.2 Loading of the air-cleaning module . 12
6.2.1 Removal and weighing of the air-cleaning module . 12
6.2.2 Installation of the air-cleaning module in the loading duct . 12
6.2.3 Loading of the air-cleaning module with a loading aerosol . 12
6.2.4 Re-weighing and re-installation of the air-cleaning module . 12
6.3 Loading of the DUT . 12
6.3.1 Weighing of the air-cleaning module or DUT . 12
6.3.2 Loading of the DUT . 13
6.3.3 Reweighing of the air-cleaning module or whole DUT . 13

Annex A (normative) Alternative definition of the CCM . 14
Annex B (informative) Estimation of the service interval time of the air-cleaning
module . 15

Annex C (normative) Alternative fine particle size range . 17
C.1 General . 17
C.2 Optical particle counter . 17
C.3 Measurement of the total decay rate after loading . 17
C.4 Background particle number concentration . 17
Annex D (informative) Schematic flow chart of the determination of the cumulative
clean mass . 18
Annex E (informative) Test report information . 19
E.1 General . 19
E.2 Loading of the air-cleaning module . 19
E.3 Results . 19
Annex F (normative) Loading duct for particle exposure of the air-cleaning module . 20
Bibliography . 21

Figure 1 – Example for the measurement of the initial CADR . 8
Figure 2 – Example for estimating the CCM by linear interpolation . 9
Figure 3 – Example where m is reached . 10
max
Figure 4 – Example for the calculation of the mass for the next loading step . 11
Figure 5 – Examples where the mass for the next loading step is replaced by m . 11
max
Figure D.1 – Flow chart of the determination of the CCM . 18
Figure F.1 – Schematic of the loading duct. 20

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Household and similar electrical air cleaning appliances - Methods for
measuring the performance - Part 2-5: Particular requirements for
determination of the performance change by loading with particles

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for
standardization comprising all national electrotechnical committees (IEC National Committees).
The object of IEC is to promote international co-operation on all questions concerning
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced
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IEC TS 63086-2-5 has been prepared by subcommittee 59N: Electrical air cleaners for
household and similar purposes, of IEC technical committee 59: Performance of household and
similar electrical appliances, in co-operation with ISO technical committee 142: Cleaning
equipment for air and other gases and subcommittee 6: Indoor air, of ISO technical committee
146: Air quality. It is a Technical Specification.
It is published as a double logo Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
59N/98/DTS 59N/101/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63086 series, published under the general title Household and
similar electrical air cleaning appliances - Methods for measuring the performance, can be
found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
1 Scope
This part of IEC 63086 specifies test methods for measuring the performance change of
electrically powered household and similar air cleaners caused by the loading with particles.
NOTE The main intention of the document is to compare differences in the performance change between air
cleaners exposed to the same loading with particles. The performance change is not necessarily representative for
real-use applications since concentration, size, morphology and chemical composition of particles present in
household or similar environments can strongly differ.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 63086-1:2020, Household and similar electrical air cleaning appliances - Methods for
measuring the performance - Part 1: General requirements
IEC 63086-2-1:2024, Household and similar electrical air cleaning appliances - Methods for
measuring the performance - Part 2-1: Particular requirements for determination of particle
reduction
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63086-1:2020, IEC
63086-2-1:2024, as well as the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
air-cleaning module
replaceable part of the DUT which is responsible for the reduction of particles
Note 1 to entry: Pre-filters which can be cleaned by the consumer are not part of the air-cleaning module (3.1.1).
3.1.2
CCM
cumulative clean mass
mass of particles loaded into or on the air-cleaning module or DUT to reduce the initial CADR
by 50 %
Note 1 to entry: An alternative definition of the CCM (3.1.2) using different values than 50 % for the reduction of
the initial CADR is given in Annex A.
Note 2 to entry: An estimated value for the service interval time of the air-cleaning module based on the CCM
(3.1.2) is described in Annex B.
3.1.3
loading aerosol
aerosol used to expose either the air-cleaning module (3.1.1) or the DUT with the aim to build
up a filter cake or to reduce electrostatic charges on the filter material
3.1.4
loading duct
channel with rectangular cross section used to expose the air-cleaning module to particles at a
defined air flow rate
3.2 Abbreviated terms
DUT device under test
CADR clean air delivery rate
CCM cumulative clean mass
DEHS di-ethyl-hexyl-sebacate
OPC optical particle counter
4 Test equipment and measurement instruments
4.1 Test aerosol generation
For producing the aerosol that is needed for testing the CADR in the fine particle size range,
either the salt aerosol generator defined in IEC 63086-2-1:2024, 5.1 or the smoke aerosol
generator defined in IEC 63086-2-1:2024, 5.2 shall be used.
4.2 Loading aerosol generation
For generating the loading aerosol a suitable aerosol generator shall be used.
NOTE Examples for suitable aerosol generators are given in 5.2.
4.3 Instrumentation for CADR measurements
For measuring the CADR in the fine particle size range, the OPC defined in IEC 63086-2-
1:2024, 4.4 shall be used.
4.4 Balance for weighing
For determination of the weight of particles loaded on the air-cleaning module or the DUT, a
balance with a resolution of at least ±0,1 g shall be used.
5 Determination of the cumulative clean mass
5.1 General
The CCM is determined by stepwise loading of either the air-cleaning module or the whole DUT
with particles and measuring the CADR after each step. As soon as the CADR has been reduced
to less than 50 % of the initial value, the loading procedure is stopped and the CCM is
determined by linear interpolation between the last two data points. As the mass loadings
needed to reach 50 % of the initial CADR can strongly depend on flow rate, filter size and
filtration technology of the DUT, a flexible loading scheme is applied.
From the different test options in IEC 63086-2-1:2024, Clause 6, the fine particle size range is
chosen to evaluate the effect under loading with particles.
If an alternative defintion of the CCM is used, the modifications specified in Annex A shall be
applied to this document.
If the alternative fine particle size range from IEC 63086-2-1:2024, Annex C is used, the
modifications specified in Annex C shall be applied to this document.
NOTE A flow chart of the procedure to determine the CCM can be found in Annex D.
5.2 Choice of the loading aerosol
5.2.1 General
There are two fundamentally different reasons that can lead to a 50 % reduction in CADR. On
the one hand, many air cleaners use electrostatically charged filters (electret filters), which may
be discharged over time by deposited particles. On the other hand, buildup of a filter cake will
lead to an increase in pressure drop and thus a reduced flow rate if the air flow rate of the air
cleaner is not regulated. There is insufficient knowledge so far how these two effects relatively
contribute to the change in CADR and there can be strong differences for different appliances
and environments. Therefore, this document proposes several alternative loading aerosols
which focus on the discharging effect or the pressure drop increase.
When performing a CCM test and reporting the results, the loading aerosol used shall be clearly
indicated in the test report (Annex E gives the information that should be included in a test
report).
5.2.2 Salt
Aerosols from salts like potassium chloride (KCl) or sodium chloride (NaCl) are widely used in
standardized filtration tests because they can be generated very reproducibly and with well-
defined particle sizes. Salt particles may extend from the fine to the ultrafine size range and
are known to lead to discharging of the filter. They can be generated using the salt aerosol
generators defined inIEC 63086-2-1:2024, 5.1.
NOTE The loading process can be accelerated by using the most concentrated salt solution which does not lead to
blocking of the nozzle of the salt aerosol generator during the loading process.
5.2.3 Dust
Aerosols from dusts like ISO A2 Fine are widely used in standardized filtration tests because
they have a well-defined particle size distribution and composition, e.g. consisting of quartz and
other silicate minerals. They are also widely used to simulate the loading of filters. The dust
particles deposit on the filter causing an increase in pressure drop mimicking real-world use.
However, dust does not cause strong electrostatic discharging effects. Therefore, it is most
appropriate if the focus is on filter clogging rather than on electrostatic discharging. Dust can
be dispersed using the methods described in IEC 63086-2-1:2024, 5.3.2.
5.2.4 Cigarette smoke
Cigarette smoke is a complex mixture of fine solid particles, liquid droplets, and semi-volatile
organic compounds. The generated particle mass can vary between l
...