EN 13141-5:2020

SLOVENSKI STANDARD
01-januar-2021
Nadomešča:
SIST EN 13141-5:2005
Prezračevanje stavb - Preskušanje lastnosti sestavnih delov/izdelkov za
prezračevanje stanovanjskih stavb - 5. del: Prezračevalne kape in strešni iztoki na
strehah
Ventilation for buildings - Performance testing of components/products for residential
ventilation - Part 5: Cowls, assisted cowls and roof outlet terminal devices
Lüftung von Gebäuden - Leistungsprüfung von Bauteilen/Produkten für die Lüftung von
Wohnungen - Teil 5: Hauben und Dach-Fortluftdurchlässe
Ventilation des bâtiments - Essais de performance des composants/produits pour la
ventilation des logements - Partie 5 : Extracteurs statiques, extracteurs statiques
assistés et dispositifs de sortie en toiture
Ta slovenski standard je istoveten z: EN 13141-5:2020
ICS:
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13141-5
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2020
EUROPÄISCHE NORM
ICS 91.140.30 Supersedes EN 13141-5:2004
English Version
Ventilation for buildings - Performance testing of
components/products for residential ventilation - Part 5:
Cowls, assisted cowls and roof outlet terminal devices
Ventilation des bâtiments - Essais de performance des Lüftung von Gebäuden - Leistungsprüfung von
composants/produits pour la ventilation des Bauteilen/Produkten für die Lüftung von Wohnungen -
logements - Partie 5 : Extracteurs statiques, extracteurs Teil 5: Hauben und Dach-Fortluftdurchlässe
statiques assistés et dispositifs de sortie en toiture
This European Standard was approved by CEN on 8 June 2020.

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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13141-5:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and abbreviated terms . 8
5 Performance testing of aerodynamic characteristics . 10
5.1 Test installation . 10
5.2 Pressure drop . 14
5.3 Suction effect of a cowl . 16
6 Performance testing of electrical characteristics. 20
6.1 Test installation . 20
6.2 Electrical power input . 20
7 Performance testing of acoustic characteristics of assisted cowl . 21
7.1 General . 21
7.2 Radiative sound power in outdoor space – L . 21
Wo
7.3 Sound power level in duct connections of the unit . 24
8 Test report . 25
8.1 General . 25
8.2 Aerodynamics characteristics . 26
8.3 Electricals characteristics . 26
8.4 Acoustics characteristics . 26
Annex A (normative) Derivation of values through the similitude law. 28
Bibliography . 29

European foreword
This document (EN 13141-5:2020) 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 April 2021, and conflicting national standards shall be
withdrawn at the latest by April 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 13141-5:2004.
In addition to a number of editorial revisions, the following main changes have been made with respect
to EN 13141-5:2004:
— modification of the title and scope to add assisted cowls;
— exclusion from the scope of roof exhaust fans which are tested according to EN 13141-4;
— reorganization of the clause concerning the performance testing of aerodynamic characteristics
(now Clause 5) in order to have a more homogeneous organization and modification of all the figures
to make them more understandable;
— modification of the subclause concerning test installation for aerodynamic characteristics (now 5.1),
which includes the modification of all tests installation requirements as well as the distinction
between requirements that apply to all the tests and those that apply only to the wind tunnel use;
— modification of the volume flow rate correction (see 5.2 concerning pressure drop);
— modification of the formula used to characterize the suction effect of a cowl (see 5.3.2 concerning the
measurements and calculations);
— renaming of “Preliminary test” as “Least favourable horizontal wind approach angle for the suction
effect” (see 5.3.3.1);
— replacement of “a wind of sufficient speed to give easily measurable pressure differences” by “a wind
of 8 m/s” (see 5.3.3.1);
— removal of the two following measurements points: V = 0,5 m/s and 1,5 m/s (see 5.3.3.2);
— more precise definition of the three series of measurements to carry out (i.e. v = 0m/s,
duct
v = 4m/s and 0 m/s < v < 4 m/s) (see 5.3.3.3);
duct duct
— for additional testing (e.g. acoustics and aerodynamic) for fan assisted cowls, reference to
EN 13141-4 is replaced by reference to EN ISO 5801 and more developed information are given;
— addition of a test method for measuring the combined effect of natural wind and wind from the fan
assisted cowl;
— addition of a detailed clause concerning the test report;
— review of the entire document in order to make it more accessible regarding the changes made.
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.
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.
Introduction
The position of this document in the field of standards for the mechanical building services is shown in
Figure 1.
Mechanical Building Services
Ventilation and air conditioning
Control systems     Heating systems

systems
Mechanical and Design criteria for
Air terminal Air handling System
Ductwork  natural residential  the indoor  Installation
devices units performance
ventilation environment
Components/product
s for residential Performance testing of Design and Performance testing
Simplified calculation
ventilation Required components/products dimensioning for and installation
methods for residential
and optional for residential residential ventilation checks for residential
ventilation systems
performance ventilation systems ventilation 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: Fans used in residential ventilation systems

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 a mechanical supply and exhaust
ventilation units (including heat recovery) for mechanical ventilation
systems intended for single family dwellings

Part 8: Performance testing of un-ducted mechanical supply and exhaust
ventilation units (including heat recovery) for mechanical ventilation
systems intended for a single room

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 13141-5 in the field of the mechanical building services
1 Scope
This document specifies methods for measuring:
— the aerodynamic characteristics of cowls, fan assisted cowls and roof outlets;
— the electrical and acoustic characteristics of fan assisted cowls.
This document is applicable to cowls, assisted cowls and roof outlets used in natural, hybrid or
mechanical ventilation and that are meant to be fitted onto ducts which project above the roof surface.
This document does not apply to:
— assisted cowls assisted by a device other than a fan (e.g. injection assisted cowls);
— roof exhaust fans (see EN 13141-4).
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 5136, Acoustics — Determination of sound power radiated into a duct by fans and other air-moving
devices — In-duct method (ISO 5136)
EN ISO 5801:2017, Fans — Performance testing using standardized airways (ISO 5801:2017)
EN ISO 7235, Acoustics — Laboratory measurement
...