Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 4: Aerodynamic, electrical power and acoustic performance of unidirectional ventilation units

This document specifies aerodynamic, acoustic and electrical power performance test methods for unidirectional ventilation units used in residential ventilation systems.
This document is applicable to ventilation units:
-   installed on a wall or in a window without any duct, A category;
-   installed in the upstream of a duct, B category;
-   installed in the downstream of a duct, C category;
-   installed in a duct, or with duct connection upstream and downstream, D category;
-   with one or several inlets/outlets;
-   installed in a system with a heat pump for domestic hot water or water for cooling or heating;
-   which can be used for supply or exhaust.
This document does not apply to:
-   fan assisted cowls which are tested according to EN 13141 5;
-   mechanical supply and exhaust units which are tested according to prEN 13141 7 or prEN 13141 8.

Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftung von Wohnungen - Teil 4: Aerodynamische, elektrische- und akustische Leistung von unidirektionalen Lüftungsgeräten

Dieses Dokument legt Verfahren zur Leistungsprüfung von für die Lüftung von Wohnungen eingesetzten unidirektionalen Lüftungsgeräten im Hinblick auf Aerodynamik, Akustik und elektrische Leistung fest.
Dieses Dokument ist auf Lüftungsgeräte anwendbar:
- die ohne Luftleitung an einer Wand oder in einem Fenster eingebaut sind (Kategorie A);
- die einer Luftleitung vorgeschaltet sind (Kategorie B);
- die im nachgeschalteten Teil einer Luftleitung eingebaut sind (Kategorie C);
- die in einer Luftleitung eingebaut sind oder denen eine Luftleitung vorgeschaltet und nachgeschaltet ist (Kategorie D);
- die einen oder mehrere Einström-/Ausströmöffnungen aufweisen;
- die in einem System mit einer Wärmepumpe für erwärmtes Trinkwasser bzw. für Kühl- oder Heizwasser eingebaut sind;
- die für Zuluft oder Fortluft verwendet werden können.
Dieses Dokument gilt nicht für:
- ventilatorgestützte Hauben, die nach den Angaben in EN 13141 5 geprüft werden;
- mechanische Zuluft- und Fortlufteinheiten, die nach den Angaben in prEN 13141 7:2020 oder prEN 13141 8:2020 geprüft werden.

Ventilation des bâtiments - Essais des performances des composants/produits pour la ventilation des logements - Partie 4 : Performance aéraulique, de puissance électrique et acoustique des unités de ventilation simple flux

Le présent document spécifie les méthodes d’essai de performance aérauliques, acoustiques et électriques pour les unités de ventilation unidirectionnelle utilisées dans les systèmes de ventilation résidentielle.
Le présent document s'applique aux unités de ventilation :
-   installées sur un mur ou une fenêtre sans aucun conduit, catégorie A ;
-   installées en amont d'un conduit, catégorie B ;
-   installées en aval d'un conduit, catégorie C ;
-   installées dans un conduit, ou avec des raccordements de conduits en amont et en aval, catégorie D ;
-   avec une ou plusieurs entrées/sorties ;
-   installées dans un système doté d'une pompe à chaleur pour la production d'eau chaude sanitaire ou d'eau pour le refroidissement ou le chauffage ;
-   qui peuvent être utilisées pour l'alimentation ou l'extraction.
Le présent document ne s'applique pas aux :
-   extracteurs statiques assistés de ventilateurs soumis à essai selon l’EN 13141-5 ;
-   unités de soufflage et d'extraction mécaniques qui sont soumises à essai selon l’EN 13141-7:2021 ou le prEN 13141-8:2021.

Prezračevanje stavb - Preskušanje lastnosti sestavnih delov/izdelkov za prezračevanje stanovanjskih stavb - 4. del: Aerodinamične, električne in akustične lastnosti enosmernih prezračevalnih enot

General Information

Status
Published
Public Enquiry End Date
04-Nov-2018
Publication Date
13-May-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-May-2021
Due Date
15-Jul-2021
Completion Date
14-May-2021

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SLOVENSKI STANDARD
SIST EN 13141-4:2021
01-junij-2021
Nadomešča:
SIST EN 13141-4:2012
Prezračevanje stavb - Preskušanje lastnosti sestavnih delov/izdelkov za

prezračevanje stanovanjskih stavb - 4. del: Aerodinamične, električne in akustične

lastnosti enosmernih prezračevalnih enot

Ventilation for buildings - Performance testing of components/products for residential

ventilation - Part 4: Aerodynamic, electrical power and acoustic performance of
unidirectional ventilation units

Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftung

von Wohnungen - Teil 4: Aerodynamische, elektrische- und akustische Leistung von
unidirektionalen Lüftungsgeräten

Ventilation des bâtiments - Essais des performances des composants/produits pour la

ventilation des logements - Partie 4 : Performance aéraulique, de puissance électrique et

acoustique des unités de ventilation simple flux
Ta slovenski standard je istoveten z: EN 13141-4:2021
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
SIST EN 13141-4:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 13141-4:2021
---------------------- Page: 2 ----------------------
SIST EN 13141-4:2021
EN 13141-4
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 91.140.30 Supersedes EN 13141-4:2011
English Version
Ventilation for buildings - Performance testing of
components/products for residential ventilation - Part 4:
Aerodynamic, electrical power and acoustic performance
of unidirectional ventilation units

Ventilation des bâtiments - Essais de performance des Lüftung von Gebäuden - Leistungsprüfungen von

composants/produits pour la ventilation des Bauteilen/Produkten für die Lüftung von Wohnungen -

logements - Partie 4 : Performance aéraulique, de Teil 4: Aerodynamische, elektrische und akustische

puissance électrique et acoustique des unités de Leistung von unidirektionalen Lüftungsgeräten

ventilation simple flux
This European Standard was approved by CEN on 25 January 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13141-4:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 8

2 Normative references .................................................................................................................................... 8

3 Terms and definitions ................................................................................................................................... 9

4 Symbols and abbreviations ...................................................................................................................... 11

5 Performance testing of aerodynamic characteristics ..................................................................... 13

5.1 External leakages ......................................................................................................................................... 13

5.1.1 Test installation ............................................................................................................................................ 13

5.1.2 Test procedure .............................................................................................................................................. 13

5.2 Air flow/pressure performance .............................................................................................................. 15

5.2.1 General ............................................................................................................................................................. 15

5.2.2 Test Installation ............................................................................................................................................ 16

5.2.3 Test procedure .............................................................................................................................................. 17

5.3 Air flow sensitivity ....................................................................................................................................... 21

5.4 Indoor/outdoor airtightness ................................................................................................................... 22

6 Energy............................................................................................................................................................... 22

6.1 Performance testing of electrical power ............................................................................................. 22

6.1.1 Testing method ............................................................................................................................................. 22

6.1.2 Electrical power input at reference and maximum air volume flow ......................................... 22

6.1.3 Assessment of part load energy efficiency (optional) .................................................................... 22

6.2 Operable mode .............................................................................................................................................. 22

6.3 Standby mode ................................................................................................................................................ 22

7 Performance testing of acoustic characteristics ............................................................................... 23

7.1 General ............................................................................................................................................................. 23

7.2 Noise radiated through the casing of the unit L ........................................................................... 25

7.2.1 General ............................................................................................................................................................. 25

7.2.2 Test Installation ............................................................................................................................................ 25

7.2.3 Measurements ............................................................................................................................................... 26

7.3 Radiated sound power level in the indoor or outdoor space – L and L ........................... 27

Wi Wo

7.3.1 General ............................................................................................................................................................. 27

7.3.2 Test Installation ............................................................................................................................................ 27

7.3.3 Measurements ............................................................................................................................................... 29

7.4 In-duct sound power level of the unit ................................................................................................... 29

7.4.1 General ............................................................................................................................................................. 29

7.4.2 Test Installation ............................................................................................................................................ 29

7.4.3 Measurements ............................................................................................................................................... 31

7.5 Airborne sound insulation ........................................................................................................................ 31

7.5.1 General ............................................................................................................................................................. 31

7.5.2 Test Installation ............................................................................................................................................ 31

7.5.3 Measurements ............................................................................................................................................... 32

8 Test results ..................................................................................................................................................... 32

8.1 Test report ...................................................................................................................................................... 32

---------------------- Page: 4 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)

8.2 Product specifications................................................................................................................................. 32

8.3 Leakages ........................................................................................................................................................... 33

8.4 Air flow/pressure curve ............................................................................................................................. 33

8.5 Air flow sensitivity for non-ducted ventilation units ...................................................................... 33

8.6 Indoor/outdoor airtightness for non-ducted ventilation units ................................................... 33

8.7 Energy ............................................................................................................................................................... 33

8.8 Acoustic characteristics ............................................................................................................................. 33

Annex A (normative) Connection box(es) .......................................................................................................... 36

Annex B (normative) Evaluation of maximum air volume flow and pressure ...................................... 38

Annex C (normative) Examples for the evaluation of reference pressure .............................................. 39

Annex D (informative) Assessment of part load energy efficiency ............................................................ 40

Bibliography ................................................................................................................................................................. 44

---------------------- Page: 5 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
European foreword

This document (EN 13141-4:2021) has been prepared by Technical Committee CEN/TC 156 “Ventilation

for buildings”, the secretariat of which is held by BSI.

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 October 2021, and conflicting national standards shall

be withdrawn at the latest by October 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

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

This document supersedes EN 13141-4:2011.

In addition to a number of editorial revisions, the following main changes have been made with respect

to EN 13141-4:2011:

— the scope has been changed, and concerns now all unidirectional ventilation units (ducted or non-

ducted units, supply or exhaust units), excluding cowls with fans (see EN 13141-5);

— the terms and definitions have been updated in accordance with the parameters used in the

document;

— performance testing of aerodynamic characteristics clause includes new testing of external leakages;

— description of the connection box has been moved in a normative annex;
— determination of the maximum and reference air flow has been added;

— assessment of part load energy efficiency has been moved in an informative annex;

— tests of air flow sensitivity and indoor/outdoor airtightness have been added;
— in the energy part, the characterization of SPI has been added;

— the whole acoustic clause has been reorganized and references to acoustic standard updated;

— testing of noise radiated by the casing for ducted units has been added;

— testing of radiated sound power in the indoor or outdoor space and the airborne sound insulation of

non-ducted units have been added;
— the safety clause has been deleted;
— a new clause dealing with all test results has been created.

A list of all parts in the EN 13141 series, published under the general title Ventilation for buildings —

Performance testing of components/products for residential ventilation can be found on the CEN website.

---------------------- Page: 6 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
---------------------- Page: 7 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
Introduction

This document specifies methods for the performance testing of components used in residential

ventilation systems to establish the performance characteristics as identified in EN 13142:2021 [1].

This document incorporates many references to other European and International Standards, especially

on characteristics other than the aerodynamic characteristics, for instance on acoustic characteristics.

In most cases, some additional tests or some additional conditions are given for the specific use in

residential ventilation systems.
This document can be used for the following applications:
— laboratory testing;
— attestation purposes.

The position of this document in the field of standards for the mechanical building services is shown in

Figure 1.
---------------------- Page: 8 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
Mechanical Building Services

Control systems Ventilation and air conditioning systems Heating systems

Air terminal Air handling Mechanical and natural Design criteria for the System
Ductwork Installation
devices units residential ventilation indoor environment performance
Components/products for
Performance testing and

residential ventilation Performance testing of Simplified calculation Design and dimensioning for

installation checks for

Required and optional components/products for methods for residential residential ventilation

residential ventilation
performance residential ventilation ventilation systems systems
systems
characteristics
Part 1: Externally and internally mounted air transfer devices
Part 2: Exhaust and supply air terminal devices
Part 3: Range hoods for residential use without fan
Part 4: Aerodynamic, electrical power and acoustic performance of unidirectional
ventilation units
Part 5: Cowls, assisted cowls and roof outlet terminal devices
Part 6: Exhaust ventilation system packages used in a single dwelling

Part 7: Performance testing of ducted mechanical supply and exhaust ventilation units

(including heat recovery)

Part 8: Performance testing of non-ducted mechanical supply and exhaust ventilation

units (including heat recovery)
Part 9: Externally mounted humidity controlled air transfer device
Part 10: Humidity controlled extract air terminal device
Part 11: Supply ventilation units

Figure 1 — Position of EN 13141-4 in the field of the mechanical building services

---------------------- Page: 9 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
1 Scope

This document specifies aerodynamic, acoustic and electrical power performance test methods for

unidirectional ventilation units used in residential ventilation systems.
This document is applicable to ventilation units:
— installed on a wall or in a window without any duct, A category;
— installed in the upstream of a duct, B category;
— installed in the downstream of a duct, C category;

— installed in a duct, or with duct connection upstream and downstream, D category;

— with one or several inlets/outlets;

— installed in a system with a heat pump for domestic hot water or water for cooling or heating;

— which can be used for supply or exhaust.
This document does not apply to:
— fan assisted cowls which are tested according to EN 13141-5;

— mechanical supply and exhaust units which are tested according to EN 13141-7:2021 or

prEN 13141-8:2021.
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.

EN 12792, Ventilation for buildings — Symbols, terminology and graphical symbols

EN ISO 717-1, Acoustics — Rating of sound insulation in buildings and of building elements — Part 1:

Airborne sound insulation (ISO 717-1)

EN ISO 5801:2017, Industrial fans — Performance testing using standardized airways (ISO 5801:2017)

EN ISO 5135, Acoustics — Determination of sound power levels of noise from air-terminal devices, air-

terminal units, dampers and valves by measurement in a reverberation room (ISO 5135)

EN ISO 5136, Acoustics — Determination of sound power radiated into a duct by fans and other air-moving

devices — In-duct method (ISO 5136)

EN ISO 10140-1, Acoustics — Laboratory measurement of sound insulation of building elements — Part 1:

Application rules for specific products (ISO 10140-1)

EN ISO 10140-2, Acoustics — Laboratory measurement of sound insulation of building elements — Part 2:

Measurement of airborne sound insulation (ISO 10140-2)

EN ISO 10140-5, Acoustics — Laboratory measurement of sound insulation of building elements — Part 5:

Requirements for test facilities and equipment (ISO 10140-5)
---------------------- Page: 10 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)

EN ISO 16890 (all parts), Air filters for general ventilation (ISO 16890 (all parts))

ISO 13347-2, Industrial fans — Determination of fan sound power levels under standardized laboratory

conditions — Part 2: Reverberant room method

ISO 13347-3, Industrial fans — Determination of fan sound power levels under standardized laboratory

conditions — Part 3: Enveloping surface methods

ISO 13347-4, Industrial fans — Determination of fan sound power levels under standardized laboratory

conditions — Part 4: Sound intensity method
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 12792, EN ISO 5801:2017 and

the following apply.

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

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
unit pressure

pressure increase induced by the ventilation unit given as difference between the total pressures at the

unit outlet and the unit inlet

Note 1 to entry: In case of equal cross-section areas of the inlet and outlet, the total pressure difference is equal

to the static pressure difference.

Note 2 to entry: The parameter p for a ventilation unit is defined as the parameter p described in EN ISO 5801

u f
for a stand alone fan.
3.2
unit static pressure

pressure increase induced by the ventilation unit given as difference between the static pressure at the

unit outlet and the total pressure at the unit inlet

Note 1 to entry: The parameter p for a ventilation unit is defined as the parameter p described in

us fs
EN ISO 5801 for a stand alone fan.
3.3
external static pressure difference
s,ext

pressure increase induced by the ventilation unit given as difference between the static pressures at the

unit outlet and the unit inlet

Note 1 to entry: The external static pressure difference, p , is used to determine the maximum air volume flow

s,ext
and the reference air volume flow.
---------------------- Page: 11 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
3.4
maximum air volume flow at zero pressure
vmax,0

measured air volume flow corresponding to the maximum achievable fan curve setting of the unit, at 0 Pa

unit static pressure, p
3.5
pressure at maximum air volume flow
qvmax

external static pressure difference, p , corresponding to the maximum air volume flow

s,ext
3.6
declared maximum air volume flow
vmax,d
declared maximum air volume flow of the unit
3.7
maximum air volume flow
vmax

air volume flow corresponding to the maximum achievable fan curve setting of the unit at the pressure

p , either declared or measured
qvmax
Note 1 to entry: To determine maximum air volume flow, see 5.2.3.3, Table 5.
3.8
reference air volume flow
vref
air volume flow corresponding to the reference pressure
Note 1 to entry: To determine reference air volume flow, see 5.2.3.4, Table 6.
3.9
reference pressure
ref

external static pressure difference, p , corresponding to the reference air volume flow

s,ext
3.10
ventilation unit

casing incorporating at least a fan, and that may include duct connections, filters, coils, electrical heating,

or any other air treatment component
3.11
external leakage

leakage to or from the air flowing inside the casing of the ventilation unit to or from the surrounding air

3.12
air flow sensitivity

maximum relative deviation of the maximum air volume flow q of a non-ducted ventilation unit due

vmax
to a static pressure difference of + 20 Pa and – 20 Pa
---------------------- Page: 12 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
3.13
indoor/outdoor airtightness
vio

maximum of air volume flow through a non-ducted ventilation unit at static pressure difference of − 20 Pa

and + 20 Pa corresponding to the setting when the fans are “OFF” and all additional shutters are closed

Note 1 to entry: Indoor/outdoor airtightness is not the external leakage.
3.14
non-ducted ventilation units
ventilation unit intended to be used without external ductwork (Cat. A)
3.15
electrical power input

average overall electrical power input to the equipment within a defined interval of time for standard air

conditions obtained from:
— the power input of the fans;

— controller(s), compressor(s), safety devices of the equipment(s) excluding additional electrical

heating devices not used for defrosting
3.16
electrical power input at the reference air volume flow
E,ref

electrical power input at reference air volume flow, q , and reference pressure, p

vref ref
3.17
maximum electrical power input
E,max

electrical power input at maximum air volume flow, q , and its corresponding pressure, p

vmax qvmax
4 Symbols and abbreviations

For the purpose of this document, the symbols and abbreviations given in EN 12792 and those listed in

Table 1 apply.
Table 1 — Symbols
Symbol Designation Unit
D airborne sound insulation dB
n,e
D (Ctr) global airborne sound insulation index dB
n,e,w
L sound power level dB
L A-weighted sound power level dB(A)
L casing emitted sound dB
---------------------- Page: 13 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
Symbol Designation Unit
L inside emitted sound dB
L outside emitted sound dB
p unit pressure Pa
p unit static pressure Pa
p pressure at maximum air volume flow Pa
qvmax
p reference pressure Pa
ref
p external static pressure difference Pa
s,ext
P electrical power input W
P maximum electrical power input W
E,max
P electrical power input at the reference air volume flow W
E,ref
q external leakage 3 a
ve m /s
q indoor/outdoor airtightness 3 a
vio m /s
q maximum air volume flow 3 a
vmax m /s
q maximum air volume flow at zero pressure 3 a
vmax,0 m /s
q declared maximum air volume flow 3 a
vmax,d m /s
q reference air volume flow 3 a
vref m /s
v air flow sensitivity %
— test voltage V
ρ density of ambient air 3
kg/m
a 3

l/s or m /h can be used for measurement of air flow but it shall be verified that all parameters are

consistent with the chosen unit.
---------------------- Page: 14 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
5 Performance testing of aerodynamic characteristics
5.1 External leakages
5.1.1 Test installation

The external leakage test shall be carried out by connecting an adjustable fan to the exhaust/supply air

side of the tested ventilation unit as shown in Figure 2.

During the pressurization tests for external leakages, the fan in the unit under test shall be switched off.

The static pressure tapping is located on a blanking off plate and the tap is connected to a pressure

measuring instrument. The external leakage flow rates at over and/or under pressure in the casing are

established with suitable air flow measuring equipment.

The accuracy of the measured values shall be kept within ± 5 % for the flow rates and ± 3 % for the static

pressures of the casing.
Key
1 adjustable fan
2 air flow measuring equipment
3 ventilation unit
4 static pressure measuring equipment
Figure 2 — External leakage test configuration
5.1.2 Test procedure
5.1.2.1 General

External leakages of ventilation units may impact ventilation efficiency of the system if the extract/supply

air flow of the building is not the intended one. The impact will depend on ventilation unit category

according to EN ISO 5801, the location of the unit, inside or outside the building, and the location of the

air flow measurement device during the air flow/pressure test, according to 5.2. Table 2 and Table 3 refer

cases where external leakages shall be reported, and cases where external leakages measurements are

optional because external leakages don't affect building air flows and are already taken into account in

electrical power consumption measurements.
---------------------- Page: 15 ----------------------
SIST EN 13141-4:2021
EN 13141-4:2021 (E)
Table 2 — External Leakage for exhaust ventilation unit
External leakage
Category of the
Unit inside the building Unit outside the building
exhaust ventilation
unit, according to
Air flow measurement location
EN ISO 5801
Extract side Exhaust side Extract side Exhaust side
Category A (non- Leakage at Leakage at
Optional Optional
ducted) + 250 Pa + 250 Pa
Category B (ducted Leakage at Leakage at
Optional Optional
outlet) + 250 Pa + 250 Pa
Category C (ducted Leakage at Leakage at Leakage at
Optional
inlet) + 250 Pa - 250 Pa - 250 Pa
Category D (both
Leakage Leakage Le
...

SLOVENSKI STANDARD
oSIST prEN 13141-4:2018
01-oktober-2018
Ventilation for buildings - Performance testing of components/products for
residential ventilation - Part 4: Aerodynamic, electrical power and acoustic
performance of unidirectional ventilation units

Ventilation for buildings - Performance testing of components/products for residential

ventilation - Part 4: Aerodynamic, electrical power and acoustic performance of
unidirectional ventilation units

Lüftung von Gebäuden - Leistungsprüfungen von Bauteilen/Produkten für die Lüftung

von Wohnungen - Teil 4: Aerodynamische, elektrische- und akustische Leistung von
unidirektionalen Lüftungsgeräten

Ventilation des bâtiments - Essais des performances des composants/produits pour la

ventilation des logements - Partie 4 : Performance aéraulique, de puissance électrique et

acoustique des unités de ventilation simple flux
Ta slovenski standard je istoveten z: prEN 13141-4
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
oSIST prEN 13141-4:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 13141-4:2018
---------------------- Page: 2 ----------------------
oSIST prEN 13141-4:2018
DRAFT
EUROPEAN STANDARD
prEN 13141-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2018
ICS 91.140.30 Will supersede EN 13141-4:2011
English Version
Ventilation for buildings - Performance testing of
components/products for residential ventilation - Part 4:
Aerodynamic, electrical power and acoustic performance
of unidirectional ventilation units

Ventilation des bâtiments - Essais des performances Lüftung von Gebäuden - Leistungsprüfungen von

des composants/produits pour la ventilation des Bauteilen/Produkten für die Lüftung von Wohnungen -

logements - Partie 4 : Performance aéraulique, de Teil 4: Aerodynamische, elektrische- und akustische

puissance électrique et acoustique des unités de Leistung von unidirektionalen Lüftungsgeräten

ventilation simple flux

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 156.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13141-4:2018 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

4 Symbols and abbreviations ...................................................................................................................... 10

5 Performance testing of aerodynamic characteristics ..................................................................... 11

5.1 External leakages ......................................................................................................................................... 11

5.2 Air flow/pressure performance .............................................................................................................. 14

5.2.1 General ............................................................................................................................................................. 14

5.2.2 Test Installation ............................................................................................................................................ 15

5.2.3 Test procedure .............................................................................................................................................. 16

5.3 Air flow sensitivity ....................................................................................................................................... 19

5.4 Indoor/outdoor airtightness ................................................................................................................... 20

6 Energy............................................................................................................................................................... 20

6.1 Performance testing of electrical power ............................................................................................. 20

6.1.1 Testing method ............................................................................................................................................. 20

6.1.2 Electrical power input at reference and maximum air volume flow ......................................... 20

6.2 Operable mode .............................................................................................................................................. 20

6.3 Standby mode ................................................................................................................................................ 20

7 Performance testing of acoustic characteristics ............................................................................... 21

7.1 General ............................................................................................................................................................. 21

7.2 Noise radiated through the casing of the unit L ............................................................................ 23

7.2.1 General ............................................................................................................................................................. 23

7.2.2 Test Installation ............................................................................................................................................ 23

7.2.3 Measurements ............................................................................................................................................... 24

7.3 Radiative sound power in the indoor or outdoor space – LWi and LWo .................................. 24

7.3.1 General ............................................................................................................................................................. 24

7.3.2 Test Installation ............................................................................................................................................ 25

7.3.3 Measurements ............................................................................................................................................... 26

7.4 In-duct sound power level of the unit ................................................................................................... 26

7.4.1 General ............................................................................................................................................................. 26

7.4.2 Test Installation ............................................................................................................................................ 27

7.4.3 Measurements ............................................................................................................................................... 28

7.5 Airborne sound insulation ........................................................................................................................ 29

7.5.1 General ............................................................................................................................................................. 29

7.5.2 Test Installation ............................................................................................................................................ 29

7.5.3 Measurements ............................................................................................................................................... 29

8 Test results ..................................................................................................................................................... 30

8.1 Test report ...................................................................................................................................................... 30

8.2 Product specifications ................................................................................................................................ 30

8.3 Leakages .......................................................................................................................................................... 31

8.4 Air flow/pressure curve ............................................................................................................................ 31

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8.5 Air flow sensitivity for non-ducted ventilation units ...................................................................... 31

8.6 Indoor/outdoor airtightness for non-ducted ventilation units ................................................... 31

8.7 Energy ............................................................................................................................................................... 31

8.8 Acoustic characteristics ............................................................................................................................. 32

Annex A (normative) Connection box(es) .......................................................................................................... 33

Annex B (normative) Evaluation of maximum air volume flow and pressure ...................................... 35

Annex C (normative) Examples for the evaluation of reference pressure .............................................. 36

Annex D (informative) Assessment of part load energy efficiency ............................................................ 37

Bibliography ................................................................................................................................................................. 41

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European foreword

This document (prEN 13141-4:2018) has been prepared by Technical Committee CEN/TC 156

“Ventilation for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13141-4:2011.

In addition to a number of editorial revisions, the following main changes have been made with respect

to EN 13141-4:2011:

— the scope has been changed, and concerns now all unidirectional ventilation units (ducted or non-

ducted units, supply or exhaust units), excluding cowls with fans (see EN 13141-5);

— the terms and definitions have been updated in accordance with the parameters used in the

document;

— performance testing of aerodynamic characteristics clause includes new testing of external

leakages;
— description of the connection box has been moved in a normative annex;
— determination of the maximum and reference air flow has been added;

— assessment of part load energy efficiency has been moved in an informative annex;

— tests of air flow sensitivity and indoor/outdoor airtightness have been added;
— in the energy part, the characterization of SPI has been added;

— the whole acoustic clause has been reorganized and references to acoustic standard updated;

— testing of noise radiated by the casing for ducted units has been added;

— testing of radiated sound power in the indoor or outdoor space and the airborne sound insulation

of non-ducted units have been added;
— the safety clause has been deleted;
— a new clause dealing with all test results has been created.

A list of all parts in the EN 13141 series, published under the general title Ventilation for buildings —

Performance testing of components/products for residential ventilation can be found on the CEN website.

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Introduction

This European Standard specifies methods for the performance testing of components used in

residential ventilation systems to establish the performance characteristics as identified in

prEN 13142 [1].

This European Standard incorporates many references to other European and International Standards,

especially on characteristics other than the aerodynamic characteristics, for instance on acoustic

characteristics.

In most cases, some additional tests or some additional conditions are given for the specific use in

residential ventilation systems.
This European Standard can be used for the following applications:
— laboratory testing;
— attestation purposes.

The position of this European Standard in the field of standards for the mechanical building services is

shown in Figure 1.
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Figure 1 — Position of EN 13141-4 in the field of the mechanical building services

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1 Scope

This document specifies aerodynamic, acoustic and electrical power performance test methods for

unidirectional ventilation units used in residential ventilation systems.
This document is applicable to ventilation units:
— installed on a wall or in a window without any duct, A category;
— installed in the upstream of a duct, B category;
— installed in the downstream of a duct, C category;

— installed in a duct, or with duct connection upstream and downstream, D category;

— with one or several inlets/outlets;

— installed in a system with a heat pump for domestic hot water or water for cooling or heating;

— which can be used for supply or exhaust.
This document does not apply to:
— fan assisted cowls which are tested according to EN 13141-5;

— mechanical supply and exhaust units which are tested according to prEN 13141-7 or prEN 13141-8.

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.

EN 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols

EN ISO 717-1, Acoustics - Rating of sound insulation in buildings and of building elements - Part 1:

Airborne sound insulation (ISO 717-1)

EN ISO 5801:2017, Industrial fans - Performance testing using standardized airways (ISO 5801:2017)

EN ISO 5135, Acoustics - Determination of sound power levels of noise from air-terminal devices, air-

terminal units, dampers and valves by measurement in a reverberation room (ISO 5135)

EN ISO 5136, Acoustics - Determination of sound power radiated into a duct by fans and other air-moving

devices - In-duct method (ISO 5136)

EN ISO 10140-1, Acoustics - Laboratory measurement of sound insulation of building elements - Part 1:

Application rules for specific products (ISO 10140-1)

EN ISO 10140-2, Acoustics - Laboratory measurement of sound insulation of building elements - Part 2:

Measurement of airborne sound insulation (ISO 10140-2)

EN ISO 10140-5, Acoustics - Laboratory measurement of sound insulation of building elements - Part 5:

Requirements for test facilities and equipment (ISO 10140-5)

EN ISO 16890 (all parts), Air filters for general ventilation (ISO 16890 (all parts))

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ISO 13347-2, Industrial fans - Determination of fan sound power levels under standardized laboratory

conditions - Part 2: Reverberant room method

ISO 13347-3, Industrial fans - Determination of fan sound power levels under standardized laboratory

conditions - Part 3: Enveloping surface methods

ISO 13347-4, Industrial fans - Determination of fan sound power levels under standardized laboratory

conditions - Part 4: Sound intensity method
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 12792:2003,

EN ISO 5801:2017 and the following apply.

ISO and IEC maintain terminological databases for the 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
3.1
fan pressure

pressure increase induced by the ventilation unit given as difference between the total pressures at the

unit outlet and the unit inlet
3.2
fan static pressure

pressure increase induced by the ventilation unit given as difference between the static pressure at the

unit outlet and the total pressure at the unit inlet
3.3
static pressure difference
s,ext

pressure increase induced by the ventilation unit given as difference between the static pressures at the

unit outlet and the unit inlet

Note 1 to entry: The static pressure difference is used to determine the maximum air volume flow and the

reference air volume flow.
3.4
maximum air volume flow at zero pressure
vmax,0

measured air volume flow corresponding to the maximum achievable fan curve setting of the unit, at

0 Pa static pressure difference
3.5
pressure at maximum air volume flow
qvmax
static pressure difference corresponding to the maximum air volume flow
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3.6
declared maximum air volume flow
vmax,d
maximum air volume flow of the unit declared by the manufacturer
3.7
maximum air volume flow
vmax

air volume flow corresponding to the maximum achievable fan curve setting of the unit at the pressure

p , either declared or measured
qvmax
Note 1 to entry: To determine maximum air volume flow, see 5.2.3.3, Table 5.
3.8
reference air volume flow
vref
air volume flow corresponding to the reference pressure
Note 1 to entry: To determine reference air volume flow, see 5.2.3.4, Table 6.
3.9
reference pressure
ref
static pressure difference corresponding to the reference air volume flow
3.10
ventilation unit

casing incorporating at least a fan, and that may include duct connections, filters, coils, electrical

heating, or any other air treatment component
3.11
external leakage

leakage to or from the air flowing inside the casing of the ventilation unit to or from the surrounding air

3.12
air flow sensitivity

maximum relative deviation of the maximum air volume flow q of a non-ducted ventilation unit due

vmax
to a static pressure difference of + 20 Pa and – 20 Pa
3.13
indoor/outdoor airtightness
vio

maximum of air volume flow through a non-ducted ventilation unit at static pressure difference of

− 20 Pa and + 20 Pa corresponding to the setting when the fans are “OFF” and all additional shutters are

closed
Note 1 to entry: Indoor/outdoor airtightness is not the external leakage.
[SOURCE: prEN 13141-8:2017, 3.1.4]
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3.14
non-ducted ventilation units
ventilation unit intended to be used without external ductwork (Cat. A)
3.15
electrical power input

average over all electrical power input to the equipment within a defined interval of time obtained

from:
— the power input of the fans;

— controller(s), compressor(s), safety devices of the equipment(s) excluding additional electrical

heating devices not used for defrosting
3.16
electrical power input at the reference air volume flow
E,ref

electrical power input at reference air volume flow, q , and reference pressure, p

vref ref
3.17
maximum electrical power input
E,max

electrical power input at maximum air volume flow, q , and its corresponding pressure, p

vmax qvmax
4 Symbols and abbreviations

For the purpose of this document, the symbols and abbreviations given in EN 12792 and those listed in

Table 1 apply.
Table1 — Symbols
Symbol Designation Unit
D airborne sound insulation dB
n,e
D (Ctr) global airborne sound insulation index dB
n,e,w
L sound power level dB
L A-weighted sound power level dB(A)
L casing emitted sound dB
L inside emitted sound dB
L outside emitted sound dB
p fan pressure Pa
p fan static pressure Pa
p pressure at maximum air volume flow Pa
qvmax
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Symbol Designation Unit
p reference pressure Pa
ref
p static pressure difference Pa
s,ext
P electrical power input W
P maximum electrical power input W
E,max
P electrical power input at the reference air volume flow W
E,ref
3 3
q external leakage m /s or l/s or m /h
3 3
q indoor/outdoor airtightness m /s or l/s or m /h
vio
3 3
q maximum air volume flow m /s or l/s or m /h
vmax
3 3
q maximum air volume flow at zero pressure m /s or l/s or m /h
vmax,0
3 3
q declared maximum air volume flow m /s or l/s or m /h
vmax,d
3 3
q reference air volume flow m /s or l/s or m /h
vref
v air flow sensitivity %
— test voltage V
ρ density of ambient air kg/m
5 Performance testing of aerodynamic characteristics
5.1 External leakages

The external leakage test shall be carried out by connecting an adjustable fan to the exhaust/supply air

side of the tested ventilation unit as shown in Figure 2.

The static pressure tapping is located on a blanking off plate and the tap is connected to a pressure

measuring instrument. The external leakage flow rates at over and/or under pressure in the casing are

established with suitable air flow measuring equipment.

The accuracy of the measured values shall be kept within ± 5 % for the flow rates and ± 3 % for the

static pressures of the casing.
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Key
1 adjustable fan
2 air flow measuring equipment
3 ventilation unit
4 static pressure measuring equipment
Figure 2 — External leakage test configuration

At least three different measurement points evenly distributed shall be made between 100 Pa and

300 Pa, and reported by means of a curve. The external leakage air volume flow rate at 250 Pa shall not

be a result of an extrapolation.

For non-ducted units, the external leakage air volume flow, q , shall be measured at over and under-

pressure of 50 Pa. The external leakage at 250 Pa shall then be calculated according to Formula (1).

0,65
 
250 Pa
  (1)
q = q
ve,250 ve,50
 
50 Pa
 

During the pressurisation tests for external leakages, the fan unit under test shall be switched off.

The external leakage air volume flow q at over and/or under pressure of 250 Pa, shall be reported as

such and also compared to the reference air volume flow q of the unit as a percentage.

vref

External leakages of ventilation units may impact ventilation efficiency of the system if the

extract/supply air flow of the building is not the intended one. The impact will depend on ventilation

unit category according to EN ISO 5801 and the location of the unit, inside or outside the building.

Table 2 and Table 3 refer cases where external leakages shall be measured and reported, and cases

where external leakages measurements are optional because they don't affect building air flows and are

already taken into account in electrical power consumption measurements.
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Table 2 — External Leakage for exhaust ventilation unit
External leakage
Category of the
Unit inside the building Unit outside the building
exhaust ventilation
unit, according to
Air flow measurement location
EN ISO 5801
Extract side Exhaust side Extract side Exhaust side
Category A (non- Leakage at Leakage at
Optional Optional
ducted) + 250 Pa + 250 Pa
Category B (ducted Leakage at Leakage at
Optional Optional
outlet) + 250 Pa + 250 Pa
Category C (ducted Leakage at Leakage at - Leakage at -
Optional
inlet) + 250 Pa 250 Pa 250 Pa
Category D (both
Leakage at +/- Leakage at +/- Leakage at +/-
ducted inlet and Optional
250 Pa 250 Pa 250 Pa
outlet)
Table 3 — External Leakage for supply ventilation unit
External leakage
Category of the
Unit inside the building Unit outside the building
supply ventilation
unit, according to
Air flow measurement location
EN ISO 5801
Supply side Outdoor side Supply side Outdoor side
Category A (non- Leakage at - Leakage at
Optional Optional
ducted) 250 Pa + 250 Pa
Category B (ducted Leakage at - Leakage at Leakage at
Optional
outlet) 250 Pa + 250 Pa + 250 Pa
Category C (ducted Leakage at - Leakage at
Optional Optional
inlet) 250 Pa + 250 Pa
Category D (both
Leakage at +/- Leakage at +/- Leakage at +/-
ducted inlet and Optional
250 Pa 250 Pa 250 Pa
outlet)
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5.2 Air flow/pressure performance
5.2.1 General

The test shall be carried out in accordance with EN ISO 5801 and in regards with the specifications

given in 5.2.2 and 5.2.3.

In order to convert the measured values of fan pressure p, static fan pressure p , static pressure

f sf

difference p and electrical power input P to the standard conditions (20 °C, 101 325 Pa) the

s,ext E
measured values shall be corrected by the density according to:
— Formula (2), correction of the fan pressure p ;
— Formula (3), correction of the static fan pressure p ;
— Formula (4), correction of the static pressure difference p ;
s,ext
— Formula (5), correction of the electrical power input P .
p = p ⋅ (2)
f f,T
p = p ⋅ (3)
fs fs,T
p = p ⋅ (4)
s,ext s,ext,T
P = P ⋅ (5)
E E,T
where
is the fan pressure under test conditions measured at the density ρ ;
f,T Te
is the static fan pressure under test conditions measured at the density ρ ;
fs,T Te

is the static fan pressure difference under test conditions measured at the density ρ ;

s,ext,T Te

P is the electrical power input under test conditions measured at the density ρ ;

E,Te Te
ρ is the density of the ambient air at the test enclosure;

ρ is the density of 1,2 kg/m corresponding to the air under standard conditions (20 °C and

101 325 Pa).

The simplified calculation method for fans supplying a pressure lower than 2 000 Pa with a Mach

number of less than 0,15 according to EN ISO 5801 can be applied.
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5.2.2 Test Installation
5.2.2.1 General

A ventilation unit is specified to supply a given air flow rate to an installation. In order to choose the

appropriate unit, it is necessary to know its aerodynamic performance characteristics, given as the

volume flow rate as a function of fan pressure p or static fan pressure p .
f sf

These characteristics are strongly influenced by upstream flow conditions (velocity profile, possible

presence of a swirl and wind). Downstream conditions do not usually affect the unit operation, but the

nature of flow downstream from the unit, especially the swirl, can have an effect on losses in the circuit

and should be taken into account during installation design.
Four categories of installations are defined in EN ISO 5801:
— category A: fr
...

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