A.C. ventilating fans and regulators for household and similar purposes - Methods for measuring performance

IEC 60665:2018 specifies the performance and the corresponding methods of test of AC ventilating fans for household and similar purposes intended for air forcing and exhaust, driven by single-phase AC motors having a power consumption of less than 125 W (including any associated regulators) for use on single-phase AC circuits not exceeding 250 V.
This document applies to ventilating fans such as partition fans for walls and windows and duct fans.
This document does not apply to:
- the safety of electric fans for household and similar purposes (IEC 60335-2- 80);
- the performance of comfort fans (IEC 60879);
- range hoods and other cooking fume extractors (IEC 61591);
- airborne acoustic noise for fans (IEC 60704-2-7);
- electromagnetic compatibility of fans (CISPR 14-1 and CISPR 14-2, IEC 61000-3-2, IEC 61000-3-3).
This second edition cancels and replaces the first edition published in 1980. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the test chambers have been updated;
b) a test chamber for a type D fan is introduced.

Aérateurs à courant alternatif et régulateurs pour applications domestiques et analogues - Méthodes de mesure de l’aptitude à la fonction

L'IEC 60665:2018 spécifie l'aptitude à la fonction et les méthodes d'essai correspondantes des aérateurs à courant alternatif pour applications domestiques et analogues, destinés à refouler et à aspirer l'air, entraînés par des moteurs à courant alternatif monophasé n'absorbant pas plus de 125 W (y compris les éventuels régulateurs associés) destinés à être utilisés sur des circuits alimentés en courant alternatif monophasé, à des tensions inférieures ou égales à 250 V.
Le présent document s'applique aux aérateurs tels que les aérateurs pour cloisons et fenêtres, ainsi que les aérateurs à conduit.
Le présent document ne s'applique pas aux aspects suivants:
- la sécurité des ventilateurs électriques pour applications domestiques et analogues (IEC 60335-2-80);
- l'aptitude à la fonction des ventilateurs de confort (IEC 60879);
- les hottes de cuisine et autres extracteurs de fumées de cuisson (IEC 61591);
- le bruit aérien émis par les ventilateurs (IEC 60704-2-7);
- la compatibilité électromagnétique des ventilateurs (CISPR 14-1 et CISPR 14-2, IEC 61000-3-2, IEC 61000-3-3).
Cette deuxième édition annule et remplace la première édition parue en 1980. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les chambres d'essai ont été modifiées;
b) une chambre d'essai a été ajoutée pour le ventilateur de type D.

General Information

Status
Published
Publication Date
22-Nov-2018
Current Stage
PPUB - Publication issued
Completion Date
23-Nov-2018
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IEC 60665
Edition 2.0 2018-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A.C. ventilating fans and regulators for household and similar purposes –
Methods for measuring performance
Aérateurs à courant alternatif et régulateurs pour applications domestiques et
analogues – Méthodes de mesure de l'aptitude à la fonction
IEC 60665:2018-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60665
Edition 2.0 2018-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A.C. ventilating fans and regulators for household and similar purposes –
Methods for measuring performance
Aérateurs à courant alternatif et régulateurs pour applications domestiques et
analogues – Méthodes de mesure de l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.120 ISBN 978-2-8322-6320-4

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60665:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Bearings .......................................................................................................................... 7

5 Speed regulators ............................................................................................................. 7

6 Marking ........................................................................................................................... 7

7 Tests ............................................................................................................................... 7

7.1 General ................................................................................................................... 7

7.2 Test voltage ............................................................................................................ 8

7.3 Test frequency ........................................................................................................ 8

7.4 Limits of voltage variation ....................................................................................... 8

7.5 Tests for air delivery performance ........................................................................... 8

8 Tolerances on fan ratings ................................................................................................ 8

8.1 Partition type ventilating fans (Type A) .................................................................... 8

8.2 Free inlet partition ventilating fans (Type B), free outlet partition ventilating

fans (Type C) and fully ducted ventilating fans (Type D) ......................................... 8

Annex A (normative) Air delivery performance evaluation ..................................................... 9

Bibliography .......................................................................................................................... 16

Figure A.1 – Plot of partial pressure of water vapour in the air against laboratory

ambient temperature for different values of relative humidity (RH) ........................................ 10

Figure A.2 – Type A test installation (outlet-side multiple nozzle test chamber) ..................... 12

Figure A.3 – Type B test installation (without antiswirl device) using multiple nozzle test

chamber ............................................................................................................................... 13

Figure A.4 – Type C test installation (inlet-side test chamber) ............................................... 14

Figure A.5 – Type D using Type B (outlet-side test duct) without antiswirl device,

without common segment and with inlet-duct simulation ....................................................... 15

---------------------- Page: 4 ----------------------
IEC 60665:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
A.C. VENTILATING FANS AND REGULATORS FOR HOUSEHOLD AND
SIMILAR PURPOSES – METHODS FOR MEASURING PERFORMANCE
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 standardization in the electrical and electronic fields. To this end and in

addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60665 has been prepared by subcommittee 59L: Small household

appliances, of IEC technical committee 59: Performance of household and similar electrical

appliances

This second edition cancels and replaces the first edition published in 1980. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) the test chambers have been updated;
b) a test chamber for a type D fan is introduced.
The text of this International Standard is based on the following documents:
CDV Report on voting
59L/139/CDV 59L/156A/RVC
---------------------- Page: 5 ----------------------
– 4 – IEC 60665:2018 © IEC 2018

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct understanding

of its contents. Users should therefore print this document using a colour printer.

---------------------- Page: 6 ----------------------
IEC 60665:2018 © IEC 2018 – 5 –
A.C. VENTILATING FANS AND REGULATORS FOR HOUSEHOLD AND
SIMILAR PURPOSES – METHODS FOR MEASURING PERFORMANCE
1 Scope

This document specifies the performance and the corresponding methods of test of AC

ventilating fans for household and similar purposes intended for air forcing and exhaust, driven

by single-phase AC motors having a power consumption of less than 125 W (including any

associated regulators) for use on single-phase AC circuits not exceeding 250 V.

This document applies to ventilating fans such as partition fans for walls and windows and duct

fans.
NOTE This document does not apply to:

– the safety of electric fans for household and similar purposes (IEC 60335-2- 80);

– the performance of comfort fans (IEC 60879);
– range hoods and other cooking fume extractors (IEC 61591);
– airborne acoustic noise for fans (IEC 60704-2-7);

– electromagnetic compatibility of fans (CISPR 14-1 and CISPR 14-2, IEC 61000-3-2, IEC 61000-3-3).

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.
ISO 5801:2007, Industrial fans – Performance testing using standardized airways
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

NOTE When the terms “voltage” and “current” are used, they imply root mean square (RMS). values unless

otherwise specified.
3.1
fan

fan blades connected to and driven by an electric motor, including its associated speed regulator,

if any
3.2
ventilating fan

fan intended to displace air either from one side of a partition to the other, or within a duct

installed either on the fan inlet or on the fan outlet, or both
---------------------- Page: 7 ----------------------
– 6 – IEC 60665:2018 © IEC 2018
3.3
partition ventilating fan
type A ventilating fan

ventilating fan installed in or upon the aperture of a partition in order to displace air from one side

of the partition to the other side, both the sides being free spaces
3.4
free inlet partition ventilating fan
type B ventilating fan
ventilating fan with a direct inlet from free space and with ducted outlet
3.5
free outlet partition ventilating fan
type C ventilating fan
ventilating fan with ducted inlet, and with direct outlet to free space
3.6
fully ducted ventilating fan
type D ventilating fan
ventilating fan with ducted inlet and ducted outlet
3.7
fan inlet diameter

diameter of the circular opening through which the air first enters the fan casing

Note 1 to entry: If the fan is provided with an inlet connecting flange or spigot, the fan inlet diameter is measured

inside this connection.

Note 2 to entry: If the opening through which the air first enters the fan casing is rectangular, the "fan inlet equivalent

diameter D " is the diameter of a circle for which the inside area is the same as the area A inside this rectangular

1 1
opening. Thus:
D =
3.8
fan outlet diameter

diameter of the circular opening through which the air finally leaves the fan casing

Note 1 to entry: If the fan is provided with an outlet connecting flange or spigot, the fan outlet diameter is measured

inside this connection.

Note 2 to entry: If the opening through which the air finally leaves the fan casing is rectangular, the "fan outlet

equivalent diameter D " is the diameter of a circle for which the inside area is the same as the area A inside this

2 2
rectangular opening. Thus:
D =
3.9
air delivery
volume flow rate
quantity of air delivered measured in m /s under specified conditions
3.10
rated air delivery
air delivery assigned to the fan by the manufacturer
---------------------- Page: 8 ----------------------
IEC 60665:2018 © IEC 2018 – 7 –
3.11
rated voltage
voltage assigned to the fan by the manufacturer
3.12
rated frequency
frequency assigned to the fan by the manufacturer
3.13
fan pressure

air pressure difference produced between the air inlet and the air outlet of the ventilating fan

4 Bearings

Instructions for the proper lubrication of bearings shall be provided by the manufacturer.

5 Speed regulators
5.1 Regulators shall be capable of reducing the speed of the fan by at least
• 35 % of full speed in the case of fans with capacitor motors,
• 20 % of full speed in the case of fans with shaded pole motors,
at the voltage and frequency specified for the air delivery performance test.

5.2 The regulator shall have an "off" position preferably next to the lowest speed position and

shall preferably be provided with five running positions.

5.3 The mechanism of the regulator shall be so designed as to ensure positive contact at

each running position. In the case of induction type regulators, no portion of the induction

winding shall remain permanently short-circuited in any of the running positions.

5.4 Positions of the regulator shall be distinctly and clearly marked and the indicator on the

operating handle or knob shall correctly indicate the position of the regulator. If used, "0" shall

correspond to the position "off" and the highest number to the highest speed operation, for

example 0-1-2-3-4-5 or 0-I-II-III-IV-V.
6 Marking
Each fan shall be indelibly marked with at least the following information:
a) rated air delivery (volume flow rate in m /s);
b) rated voltage (in V);
c) rated power input (in W).
7 Tests
7.1 General

The tests specified in this document are type tests. The measurements of air pressure,

temperature, input power, voltage and physical dimensions shall be carried out when the

measurements of air delivery performance are carried out.
---------------------- Page: 9 ----------------------
– 8 – IEC 60665:2018 © IEC 2018
7.2 Test voltage
7.2.1 The tests shall be conducted at the rated voltage.

7.2.2 If the fan is specified for two or more distinct rated voltages, the tests shall be carried

out at the most unfavourable voltage.
7.2.3 When there is a voltage range, the test voltage shall be:

• the more unfavorable voltage of the highest and the lowest values of the range, when the

difference between the highest and the lowest values is in excess of 10 % of the mean of the

range;

• the mean of the upper and lower limits when the difference of the highest and the lowest

values is 10 % or less of the mean of the range.
7.3 Test frequency
7.3.1 Fans shall be tested at rated frequency, if marked.

7.3.2 For AC fans that are not marked with a rated frequency or are marked with a rated

frequency range of 50 Hz to 60 Hz, they are tested with either 50 Hz or 60 Hz, whichever is the

more unfavorable.
7.4 Limits of voltage variation

The variation in the voltage shall not exceed ±1% of the test voltage during the air performance

tests. While taking the current and power readings during these tests, however, the voltage shall

be the test voltage.
7.5 Tests for air delivery performance

Air delivery performance is evaluated in accordance with the relevant clauses of ISO 5801:2007

using the test chambers and calculations as modified in Annex A of this document. The fan

speed regulator, if any, shall be set to 100 % of full speed.
For Type A ventilating fans, the test chamber in Figure A.2 applies.
For Type B ventilating fans, the test chamber in Figure A.3 applies.
For Type C ventilating fans, the test chamber in Figure A.4 applies.
For Type D ventilating fans, the test chamber in Figure A.5 applies.

Before commencing the tests, the fan shall be operated for approximately 1 h while supplied at

rated voltage.
8 Tolerances on fan ratings
8.1 Partition type ventilating fans (Type A)
The measured air delivery shall be at least 90 % of the rated air delivery.

8.2 Free inlet partition ventilating fans (Type B), free outlet partition ventilating fans

(Type C) and fully ducted ventilating fans (Type D)
The measured air delivery shall be at least 95 % of the rated air delivery.
---------------------- Page: 10 ----------------------
IEC 60665:2018 © IEC 2018 – 9 –
Annex A
(normative)
Air delivery performance evaluation
For Type A ventilating fans, the test chamber in Figure A.2 applies.
For Type B ventilating fans, the test chamber in Figure A.3 applies.
For Type C ventilating fans, the test chamber in Figure A.4 applies.
For Type D ventilating fans, the test chamber in Figure A.5 applies.

The measurement of the average pressure in the airway is specified in Clause 7 of

ISO 5801:2007 and the wall tapping used for insertion of the manometer tubes are detailed in

Figure 2 of ISO 5801:2007.

The flow rate is determined using multiple nozzles as specified in Clause 22 of ISO 5801:2007.

Multiple nozzles without throat tappings are used with length L = 0,6 d ± 0,005 d.

The mass flow rate in general is determined from the following equation:
q(= αd ) 2ρΔp
ma∑ ii
i=1
where
n is the number of nozzles;
ε is expansibility factor assumed equal to 1 for domestic fans;

d is the nozzle diameter for the i nozzle from Figure 16b of ISO 5801:2007, expressed in

Δp is the pressure differential across the nozzle (refer to Figure A.2, Figure A.3, Figure A.4

and Figure A.5 for the test setup for Type A, Type B, Type C and Type D ventilating fans

respectively), expressed in Pa;
ρ is the air density upstream from the nozzles, expressed in kg/m ;

α is the flow rate coefficient obtained from Table 4 of ISO 5801:2007 for the calculated value

of Re for a given nozzle
The value of α can be obtained from the following equation for L / d = 0,6:
 
7,006 134,6 1 C
 
α 0,998 6−+
 44
d 11−αβ −αβ
 Au  Au
where

α is the kinetic energy coefficient upstream of the nozzle, equal to 1,043 for an in-duct

nozzle and 1 for a nozzle and a multiple nozzle in chamber or a free-inlet nozzle;

β is d / D (which may be taken as 0 for a chamber) (β < 0,525 for an in-duct nozzle);

) or fan outlet diameter (= D )
D is the fan inlet diameter (= D
1 2
C is the nozzle discharge coefficient;

is the Reynolds number based on the exit diameter, which may be estimated by the

following equation:
2ρpΔ
a 6
Re 0,95εd ×10
17,1+ 0,048t
= =
---------------------- Page: 11 ----------------------
– 10 – IEC 60665:2018 © IEC 2018
where
ρ is the air density upstream from the nozzle, expressed in kg/m ;
t is the temperature upstream from the nozzle, expressed in °C;
d is the nozzle throat diameter for the i nozzle, expressed in m;
ε is the expansibility factor assumed equal to 1 for domestic fans.
pp− 0,378
ρ =
287 t + 273,15
( )
where
p is the ambient air pressure, expressed in Pa;
t is the dry bulb ambient air temperature, expressed in °C;
p is the partial pressure of water vapour in the air, expressed in Pa.
The value of p is given by
2 34− 46− 5
ph= 610,8+ 44,442t+1,413 3t+ 0,027 68t+ 2,556 67×10 t+ 2,891 66×10 t
vu( a a a a a)
where h is the relative humidity

A plot of partial pressure of water vapour in the air against laboratory ambient temperature for

different values of relative humidity is shown in Figure A.1.
8 000
RH = 100 %
7 000
RH = 90 %
6 000
RH = 75 %
5 000
4 000
RH = 50 %
3 000 RH = 40 %
2 000
RH = 20 %
1 000
0 5 10 15 20 25 30 35 40 45
Test laboratory dry bulb temperature (°C)
IEC

Figure A.1 – Plot of partial pressure of water vapour in the air against laboratory

ambient temperature for different values of relative humidity (RH)
The reference test conditions are:
• RH < 90 % at 25 °C;
Partial water vapour pressure (Pa)
---------------------- Page: 12 ----------------------
IEC 60665:2018 © IEC 2018 – 11 –

• maximum ambient dry bulb temperature < 90 °C, therefore the effect of ignoring p in

calculating ρ is less than 1 % and hence its effect is ignored.

NOTE The altitude of the test location can be ignored since results are corrected to normalised air density at sea

level with a standard atmosphere.
For household fans, it is assumed that:
• the air velocity < 25 m/s;
• the fan pressure < 1 000 Pa;

• the reference Mach number < 0,15 and fan pressure ratio is < 1,02, therefore the effect of air

compressibility is neglected.

Consequently, air pressure and air temperature (dry bulb) are taken as the values measured in

the laboratory during the tests.
The volume flow rate (air delivery) is obtained from:
q =
The fan pressure is obtained from:
p = p + p
f a dyn
where
p is the total fan pressure, expressed in Pa;
p is the laboratory air pressure, expressed in Pa
p is the fan dynamic pressure, expressed in Pa.
dyn
1 
pf=
dyn  M2
2ρA

where A is the cross-sectional area of the fan at the plane where the air exits the fan, expressed

in m
For domestic fans assume f = 1.
The fan pressure obtained depends on the air density at the place of test.

To obtain reproducible results, it is necessary to normalise the total fan pressure for standard air

density. The value of standard air density is ρ = 1,2 kg/m at sea level and
p ρ
fN N
p ρ
Hence
1,2⋅p
p =
---------------------- Page: 13 ----------------------
– 12 – IEC 60665:2018 © IEC 2018

The next step is to obtain the fan output power. For this, the value of normalised total fan

pressure is used.
p =q .p .κ
uN v fN p
where
p is the normalised fan output power, expressed in W;

κ is the air compressibility coefficient (for household fans κ assumes the value of 1).

p p

The fan input power P is measured during the air delivery performance test with the fan being

supplied at rated voltage.

The overall fan efficiency with respect to the normalised fan output power is then obtained

η =

The fan speed shall be measured with the regulator set to 100 % of full speed. The fan speed

shall then be measured with the regulator set as described in 5.1.
Dimensions in millimetres
J ≥0,5 D
0,5 J 38 ±6
38 ±6
PL1 PL2 PL4 PL6 PL8
≥2,5 d
p p ∆p
e4 e6
IEC
Key
1 test fan
2 flow-setting means
3 variable exhaust system

The distance J shall be equal to at least the diameter of the outlet duct for fans with axis of rotation perpendicular

to the discharge
...

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