prEN 13142

Ventilation for buildings - Components/products for residential ventilation - Required and optional performance characteristics

This document specifies and classifies the component/product performance characteristics, which may be necessary for the design, rating and dimensioning, placing on the market of residential ventilation products and systems to provide the predetermined performance, comfort conditions of temperature, air velocity, humidity, hygiene and sound in the occupied zone.
It defines those performance characteristics (mandatory or optional) which are determined, measured and presented according to relevant test methods. It provides a classification scheme, which leads to a full definition of product properties based on test methods described in various European Standards, and gives an overview of the test standards. Distinction between mandatory and optional requirements is left to each European and national regulation(s).
The codification part in Annex B and the classification part in Clause 8 apply to the following products:
-   unidirectional mechanical supply and exhaust residential ventilation units according to EN 13141-4:2021 and EN 13141-6:2014;
-   ducted mechanical bidirectional residential ventilation units according to EN 13141-7:2021;
-   non-ducted mechanical bidirectional residential ventilation units according to EN 13141-8:2022.
This document does not apply to other products such as filters, fire dampers, ducts, control devices and sound attenuators, which may also be incorporated in residential ventilation.
This document specifies in Annex ZA and Annex ZB the requirements of EU 1253/2014 and EU 1254/2014 for residential ventilation units below 1 000 m3/h air volume flow.
This document does not cover requirements raised by European Directives (e.g. low voltage directive, EMC directive) and other requirements such as corrosion, reaction to fire and snow penetration.

Lüftung von Gebäuden - Bauteile/Produkte für die Lüftung von Wohnungen - Geforderte und frei wählbare Leistungskenngrößen

Dieses Dokument legt die Leistungskenngrößen von Bauteilen bzw. Produkten fest, die für die Auslegung, Einstufung und Dimensionierung, Markteinführung von Produkten und Anlagen für die Wohnungslüftung erforderlich sein können, um die einzuhaltenden Leistungsanforderungen, Behaglichkeitsbedingungen bezüglich Temperatur, Luftgeschwindigkeit, Luftfeuchte, Hygiene und Schall im Aufenthaltsbereich zu erreichen, und klassifiziert diese Leistungskenngrößen.
Das Dokument definiert diejenigen Leistungskenngrößen (verbindlich vorgeschrieben oder frei wählbar), die nach den entsprechenden Prüfverfahren bestimmt, gemessen und dargestellt werden. Es bietet ein Klassifizierungsschema, das eine vollständige Definition der Produkteigenschaften auf der Grundlage von in verschiedenen Europäischen Normen beschriebenen Prüfverfahren ermöglicht, und liefert einen Überblick über die Prüfnormen. Die Entscheidung darüber, welche Anforderungen verbindlich vorgeschrieben und welche frei wählbar sind, ist der/den jeweiligen Europäischen und nationalen Vorschrift(en) überlassen.
Der Kodierungsteil in Anhang B und der Klassifizierungsteil in Abschnitt 8 gelten für die folgenden Produkte:
-   unidirektionale ventilatorgestützte Zu- und Abluft-Lüftungsgeräte für Wohnungen nach EN 13141-4:2021 und EN 13141-6:2014;
-   ventilatorgestützte, bidirektionale Lüftungsgeräte mit Kanalanschluss für Wohnungen nach EN 13141-7:2021;
-   ventilatorgestützte, bidirektionale Lüftungsgeräte ohne Kanalanschluss für Wohnungen nach EN 13141-8:2022.
Dieses Dokument gilt nicht für weitere Produkte wie Filter, Brandschutzklappen, Luftleitungen/Kanäle, Steuer- und Regelungseinrichtungen und Schalldämpfer, die ebenfalls Bestandteil einer Wohnungslüftung sein dürfen.
Dieses Dokument legt in Anhang ZA und Anhang ZB die Anforderungen der EU 1253/2014 und der EU 1254/2014 für Wohnungs-Lüftungsgeräte unter 1 000 m3/h Luftvolumenstrom fest.
Dieses Dokument deckt keine Anforderungen Europäischer Richtlinien (z. B. der Niederspannungsrichtlinie und der EMV Richtlinie), ebenso wie weitere Anforderungen, beispielsweise hinsichtlich der Korrosion, des Brandverhaltens und des Widerstands gegen das Eindringen von Schnee, ab.

Ventilation des bâtiments - Composants/produits pour la ventilation des logements - Caractéristiques de performances exigées et optionnelles

Le présent document spécifie et classe les caractéristiques de performance des composants/produits qui peuvent être nécessaires pour la conception, la classification et le dimensionnement, la mise à disposition sur le marché des produits et systèmes de ventilation résidentielle afin de fournir les performances, les conditions de confort en température, la vitesse d’air, l’humidité, l’hygiène et le bruit prédéterminés dans la zone occupée.
Il définit les caractéristiques de performance (obligatoires ou optionnelles) qui sont à déterminer, mesurer et présenter selon des méthodes d'essais appropriées. Il fournit un schéma de classification qui conduit à une définition complète des propriétés du produit basée sur des méthodes d’essais décrites dans diverses normes européennes et donne une vue d’ensemble des normes d’essais. La distinction entre les exigences obligatoires et optionnelles est laissée à chaque réglementation européenne et nationale.
La partie codification en Annexe B et la partie classification à l’Article 8 s’appliquent aux produits suivants :
-   unités de ventilation mécanique unidirectionnelle résidentielle par insufflation et par extraction selon l'EN 13141-4:2021 et l’EN 13141-6:2014 ;
-   unités de ventilation mécanique double flux résidentielle raccordées selon l'EN 13141-7:2021 ;
-   unités de ventilation mécanique bidirectionnelle résidentielle non raccordées selon l’EN 13141-8:2022.
Le présent document ne s'applique pas aux autres produits tels que les filtres, clapets coupe feu, conduits, dispositifs de régulation et atténuateurs de bruit, qui peuvent également être intégrés en ventilation résidentielle.
Le présent document spécifie à l’Annexe ZA et l’Annexe ZB, les exigences de l'UE 1253/2014 et l’UE 1254/2014 pour les unités de ventilation résidentielle à débit volumique d'air inférieur à 1 000 m3/h.
Le présent document ne couvre pas les exigences requises par les Directives européennes (par exemple, Directive Basse Tension, Directive CEM) ni d’autres exigences telles que la corrosion, la réaction au feu et la pénétration de la neige.

Prezračevanje stavb - Sestavni deli/izdelki za prezračevanje stanovanjskih stavb - Zahtevane in izbirne lastnosti

Ta dokument določa in razvršča značilnosti zmogljivosti komponent/izdelkov, ki so lahko potrebne za načrtovanje, ocenjevanje in dimenzioniranje, dajanje na trg stanovanjskih prezračevalnih izdelkov in sistemov, da zagotovijo predvideno zmogljivost, udobne pogoje temperature, hitrosti zraka, vlažnosti, higiene in zvoka v zasedenem območju.
Določa tiste značilnosti zmogljivosti (obvezne ali neobvezne), ki so določene, izmerjene in predstavljene v skladu z ustreznimi preskusnimi metodami. Ponuja shemo razvrščanja, ki vodi do popolne opredelitve lastnosti izdelka na podlagi preskusnih metod, opisanih v različnih evropskih standardih, in nudi pregled preskusnih standardov. Razlikovanje med obveznimi in neobveznimi zahtevami je prepuščeno vsaki evropski in nacionalni regulativi.
Del kodifikacije v Prilogi B in del razvrščanja v točki 8 se uporablja za naslednje izdelke:
- enosmerne mehanske enote za dovod in odvod zraka v stanovanjih v skladu z EN 13141-4:2021 in EN 13141-6:2014;
- kanalske mehanske dvosmerne stanovanjske prezračevalne enote v skladu z EN 13141-7:2021;
- nekanalske mehanske dvosmerne stanovanjske prezračevalne enote v skladu z EN 13141-8:2022.
Ta dokument se ne uporablja za druge izdelke, kot so filtri, požarni loputi, kanali, nadzorni napravi in dušilci zvoka, ki so lahko prav tako vključeni v stanovanjsko prezračevanje.
Ta dokument določa v Prilogi ZA in Prilogi ZB zahteve uredb EU 1253/2014 in EU 1254/2014 za stanovanjske prezračevalne enote z volumnskim pretokom zraka pod 1 000 m3/h.
Ta dokument ne zajema zahtev, ki jih postavljajo evropske direktive (npr. direktiva o nizki napetosti, EMC direktiva) in drugih zahtev, kot so korozija, reakcija na ogenj in vdor snega.

General Information

• Status: Not Published
• Publication Date: 02-Jan-2028
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 156 - Ventilation for buildings
• Drafting Committee: CEN/TC 156/WG 2 - Natural and mechanical powered residential ventilation
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 21-May-2026
• Due Date: 10-Aug-2026
• Completion Date: 21-May-2026
• Directive: Not Harmonized1253/2014 - Commission Regulation (EU) No 1253/2014 of 7 July 2014 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for ventilation units
• Directive:

  ---

  Not Harmonized1254/2014 - Commission Delegated Regulation (EU) No 1254/2014 of 11 July 2014 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to energy labelling of residential ventilation units
• Mandate: M/537 - [C2015)8325] Standardisation request to the European Committee for Standardisation as regards ventilation units in support of Regulation (EU) No 1253/2014 and Delegated Regulation (EU) No 1254/2014
• Ref Project: oSIST prEN 13142:2026 - Ventilation for buildings - Components/products for residential ventilation - Required and optional performance characteristics

Relations

• Referred By: EN ISO 4349:2024 - Solid recovered fuels - Determination of the Recycling Index for co-processing (ISO 4349:2024)
• Effective Date: 28-Jan-2026
• Revises: EN 13142:2021 - Ventilation for buildings - Components/products for residential ventilation - Required and optional performance characteristics
• Effective Date: 13-Mar-2024

Overview

prEN 13142 is a draft European Standard developed by CEN (European Committee for Standardization) that specifies and classifies the required and optional performance characteristics of components and products used in residential ventilation systems. The standard plays a critical role in supporting energy efficiency, indoor air quality, and occupant comfort by establishing performance criteria for key ventilation products. prEN 13142 outlines mandatory and optional performance characteristics, based on relevant European test methods, and provides a clear classification scheme for efficient comparison and selection of residential ventilation products.

Designed for manufacturers, designers, specifiers, and regulators, this standard is essential for ensuring that residential ventilation systems meet modern expectations for comfort, hygiene, acoustics, and energy performance. It is linked to EU ecodesign and energy labeling regulations (EU 1253/2014 and 1254/2014), ensuring compliance and harmonization across the European single market.

Key Topics

• Product Scope: Covers unidirectional mechanical supply and exhaust ventilation units, ducted mechanical bidirectional ventilation units, and non-ducted mechanical bidirectional ventilation units for residential applications.
• Performance Characteristics: Details mandatory and optional performance requirements such as air flow, temperature control, humidity, hygiene, sound levels, aerodynamic and energy efficiency.
• Product Testing and Classification: Standardizes how performance data are determined, measured, and presented, based on applicable European Standards. Provides a robust classification and codification system for ease of comparison.
• Compliance with Regulations: Specifies requirements in line with EU 1253/2014 and 1254/2014 for residential ventilation units below 1,000 m³/h air volume flow.
• Product Exclusions: Does not apply to filters, fire dampers, ducts, control devices, or sound attenuators, even though these may be integrated within ventilation systems.
• Documentation and Information: Emphasizes clear marking, labeling, and provision of product information, as well as directions for maintenance and cleaning.

Applications

prEN 13142 is highly practical for a variety of stakeholders in the construction and HVAC sectors:

• Manufacturers: Enables the development and marketing of compliant and high-performing residential ventilation products aligned with European and national regulations.
• Designers and Specifiers: Assists in selecting appropriate ventilation units based on required performance for new builds or renovation projects, considering factors like airflow, energy efficiency, and sound insulation.
• Regulatory Authorities: Offers a consistent framework for assessing conformity with energy-related product requirements and supports harmonized enforcement across the EU.
• Installers and Maintenance Providers: Facilitates understanding of installation needs, routine maintenance, and end-user information for long-term performance and reliability.
• End Users and Building Owners: Ensures residential occupants benefit from improved comfort, healthy indoor air, and optimized energy consumption through standardized ventilation solutions.

Related Standards

To support consistent performance assessment and compliance, prEN 13142 references and aligns with several key standards in residential ventilation and building HVAC, including:

• EN 13141 Series: Performance testing of various components/products for residential ventilation, covering air transfer devices, terminal devices, range hoods, unidirectional and bidirectional units, cowls, and roof outlets.
• EN 12792: Ventilation for buildings - Symbols, terminology, and graphical symbols.
• EN ISO 16890 Series: Air filters for general ventilation - technical specifications, efficiency, and testing.
• EN IEC 61591: Cooking fume extractors - performance measurement methods.
• EU Regulations 1253/2014 and 1254/2014: Ecodesign and energy labeling requirements for residential ventilation units.

prEN 13142 is an essential reference for anyone engaged in designing, producing, specifying, or regulating residential ventilation systems, offering a clear foundation for performance, comfort, and regulatory alignment in the built environment.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2026
Prezračevanje stavb - Sestavni deli/izdelki za prezračevanje stanovanjskih stavb -
Zahtevane in izbirne lastnosti
Ventilation for buildings - Components/products for residential ventilation - Required and
optional performance characteristics
Lüftung von Gebäuden - Bauteile/Produkte für die Lüftung von Wohnungen - Geforderte
und frei wählbare Leistungskenngrößen
Ventilation des bâtiments - Composants/produits pour la ventilation des logements -
Caractéristiques de performances exigées et optionnelles
Ta slovenski standard je istoveten z: prEN 13142
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2026
ICS 91.140.30 Will supersede EN 13142:2021
English Version
Ventilation for buildings - Components/products for
residential ventilation - Required and optional
performance characteristics
Ventilation des bâtiments - Composants/produits pour Lüftung von Gebäuden - Bauteile/Produkte für die
la ventilation des logements - Caractéristiques de Lüftung von Wohnungen - Geforderte und frei
performances exigées et optionnelles wählbare Leistungskenngrößen
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, 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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13142:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Symbols and abbreviations . 11
5 Performance characteristics for residential ventilation components/products . 15
5.1 General . 15
5.1.1 Generality for tests . 15
5.1.2 Outdoor mixing (for supply and exhaust units) . 15
5.1.3 Indoor mixing (for supply and exhaust units) . 15
5.1.4 Correction of temperature ratio (for supply and exhaust units) . 15
5.2 Externally mounted air transfer devices . 16
5.2.1 Aerodynamic characteristics . 16
5.2.2 Equivalent area . 16
5.2.3 Free area . 16
5.2.4 Controls . 17
5.2.5 Air diffusion characteristics . 17
5.2.6 Acoustic characteristics . 17
5.2.7 Water penetration . 17
5.3 Internally mounted air transfer devices . 17
5.3.1 Aerodynamic characteristics . 17
5.3.2 Equivalent area . 17
5.3.3 Free area . 17
5.3.4 Acoustic characteristics . 17
5.4 Exhaust and supply air terminal devices . 17
5.4.1 Aerodynamic characteristics . 17
5.4.2 Acoustic characteristics . 17
5.4.3 Controls . 18
5.4.4 Air diffusion characteristics . 18
5.5 Range hoods . 18
5.5.1 Aerodynamic characteristics . 18
5.5.2 Acoustic characteristics . 18
5.5.3 Efficiency of grease absorption . 18
5.5.4 Effectiveness of odour extraction . 18
5.5.5 Electrical power input . 18
5.5.6 Controllability . 18
5.6 Exhaust or supply unidirectional ventilation units . 18
5.6.1 Data input . 18
5.6.2 Declared data . 19
5.6.3 General on classification . 19
5.6.4 Aerodynamic characteristics . 20
5.6.5 Energy. 21
5.6.6 Acoustic characteristics . 24
5.7 Cowls and roof outlet terminals. 26
5.7.1 Pressure drop. 26
5.7.2 Free area . 26
5.7.3 Suction effect . 26
5.7.4 Acoustic characteristics . 27
5.8 Exhaust ventilation system packages used in a single dwelling . 27
5.8.1 General . 27
5.8.2 Aerodynamic characteristics . 27
5.8.3 Energy . 27
5.8.4 Acoustic characteristics . 28
5.9 Ducted mechanical bidirectional ventilation units (including heat recovery) . 29
5.9.1 Data input . 29
5.9.2 Declared data . 29
5.9.3 General on classification . 30
5.9.4 Aerodynamic characteristics . 30
5.9.5 Thermal characteristics . 32
5.9.6 Energy . 33
5.9.7 Acoustic characteristics . 35
5.10 Non-ducted mechanical bidirectional ventilation units (including heat recovery) . 36
5.10.1 Data input . 36
5.10.2 Declared data . 37
5.10.3 General on classification . 37
5.10.4 Aerodynamic characteristics . 37
5.10.5 Thermal characteristics . 39
5.10.6 Energy . 40
5.10.7 Acoustics characteristics . 42
6 Manual, cleaning and maintenance . 43
6.1 Manual . 43
6.2 Cleaning and maintenance . 43
6.3 Check of maintenance criteria . 44
7 Marking, labelling and product information . 44
8 Declaration and codification of mechanical bidirectional ventilation units . 46
8.1 General . 46
8.2 Filter . 46
8.3 Materials . 46
8.3.1 Reaction to fire . 46
8.3.2 Hygiene and health . 47
Annex A (normative) Additional list for controls declaration. 48
Annex B (informative) Additional check list for declaration and codification . 51
B.1 Filter bypass leakage . 51
B.2 Design criteria . 51
B.3 Controls . 52
B.4 Additional equipment . 54
Annex C (informative) Schematics for classification and codification of ventilation units
and relevant test standards . 55
Annex D (informative) Filter clogging compensation . 59
D.1 General . 59
D.2 Definition and calculation of the filter compensation factor . 59
D.3 Classification of the filter compensation factor . 60
D.4 Test method . 60
D.5 Example of test set up for bidirectional ventilation units . 60
Annex E (informative) Calculation of an extended SEC . 62
E.1 Terms and definitions for this annex . 62
E.2 Model . 62
E.2.1 General . 62
E.2.2 General total energy balance . 62
E.2.3 General electric energy balance . 62
E.2.4 Heating energy saving . 63
E.2.5 Annual electricity consumption for defrosting . 66
E.2.6 Default values for calculation and classification . 73
Annex F (informative) Calculation of an extended SEC considering infiltration . 78
F.1 General . 78
F.2 Extended SEC calculation . 78
Annex G (informative) SEC calculation example according to EU 1253/2014 and
EU 1254/2014 . 79
G.1 General . 79
G.2 Example - SEC calculations . 80
G.2.1 Example 1 - Single dwelling ducted bidirectional ventilation unit with heat
exchanger (centralized heat recovery) . 80
G.2.2 Example 2 - Single dwelling ducted bidirectional ventilation unit with heat
exchanger with local control and variable speed . 81
G.2.3 Example 3 - Single room non-ducted ventilation unit with recovery heat exchanger . 81
G.2.4 Example 4 - Single room non-ducted ventilation unit with positive input ventilation . 82
G.2.5 Example 5 – Exhaust unidirectional ventilation unit . 83

Annex H (informative) Data for calculation example of SEC . 84
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EC) No 1253/2014 aimed to be covered . 85
Annex ZB (informative) Relationship between this European Standard and the energy
labelling requirements of Commission Delegated Regulation (EC) No 1254/2014
aimed to be covered . 88
Bibliography . 91

European foreword
This document (prEN 13142:2026) 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 13142:2021.
In addition to a number of editorial revisions, the following main changes have been made:
— update of Annex ZA and Annex ZB;
— update of references;
— moving of the contents of Annex ZA to the new Annex H.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA and Annex ZB, which are integral
parts of this document.
Introduction
A combination of components and/or products is required to provide ventilation. These
components/products interact to achieve a renewal of the air in a dwelling.
It is important to consider each product not only individually but also as part of the whole system: for
example, from the outdoor canopy of an externally mounted air transfer device to the roof outlet terminal
at the end of an exhaust duct. To enable good design, it is essential that certain performance
characteristics for each product are available in a simple and comparable form.
This document defines a classification for balanced ventilation units which may be used for the
determination of minimum and optional product characteristics in national building regulations and
standards.
The structure of this document is based on the type of products that are given in Table 1, which specifies
the type of information for them.
Table 1 — Type of information for products
Product Declaration Classification Codification
Externally mounted air transfer devices X — —
Internally mounted air transfer devices X — —
Exhaust and supply air terminal devices X — —
Range hoods X — —
Exhaust or supply unidirectional ventilation units X X X
in residential ventilation systems
Cowls and roof outlet terminals X — —
Unidirectional exhaust ventilation system X — —
packages
Ducted mechanical bidirectional ventilation units
X X X
(including heat recovery)
Non-ducted bidirectional ventilation units
X X X
(including heat recovery)
This document is one of a series of standards on residential ventilation. It is referring to the performance
testing of the components/products for residential ventilation.
The position of this document in the field of the mechanical building services is shown in Figure 1.
Figure 1 — Position of EN 13142 in the field of the mechanical building services
EN 13142:2021 has been revised to include new requirements according to Ecodesign requirements for
ventilation units .
Ecodesign requirements for ventilation units are given in EU Commission Delegated Regulation
No EU 1253/2014 and No EU 1254/2014.
1 Scope
This document specifies and classifies the component/product performance characteristics, which may
be necessary for the design, rating and dimensioning, placing on the market of residential ventilation
products and systems to provide the predetermined performance, comfort conditions of temperature, air
velocity, humidity, hygiene and sound in the occupied zone.
It defines those performance characteristics (mandatory or optional) which are determined, measured
and presented according to relevant test methods. It provides a classification scheme, which leads to a
full definition of product properties based on test methods described in various European Standards, and
gives an overview of the test standards. Distinction between mandatory and optional requirements is left
to each European and national regulation(s).
The codification part in Annex B and the classification part in Clause 8 apply to the following products:
— unidirectional mechanical supply and exhaust residential ventilation units according to
EN 13141-4:2021 and EN 13141-6:2014;
— ducted mechanical bidirectional residential ventilation units according to EN 13141-7:2021;
— non-ducted mechanical bidirectional residential ventilation units according to EN 13141-8:2022.
This document does not apply to other products such as filters, fire dampers, ducts, control devices and
sound attenuators, which may also be incorporated in residential ventilation.
This document specifies in Annex ZA and Annex ZB the requirements of EU 1253/2014 and
EU 1254/2014 for residential ventilation units below 1 000 m /h air volume flow.
This document does not cover requirements raised by European Directives (e.g. low voltage directive,
EMC directive) and other requirements such as corrosion, reaction to fire and snow penetration.
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 13141-1:2019, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 1: Externally and internally mounted air transfer devices
EN 13141-2:2010, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 2: Exhaust and supply air terminal devices
EN 13141-3:2017, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 3: Range hoods for residential use without fan
EN 13141-4:2021, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 4: Aerodynamic, electrical power and acoustic performance of unidirectional ventilation
units
EN 13141-5:2020, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 5: Cowls, assisted cowls and roof outlet terminal devices
EN 13141-6:2014, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 6: Exhaust ventilation system packages used in a single dwelling
EN 13141-7:2021, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 7: Performance testing of ducted mechanical supply and exhaust ventilation units
(including heat recovery)
EN 13141-8:2022, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 8: Performance testing of non-ducted mechanical supply and exhaust ventilation units
(including heat recovery)
EN 13141-9:2008, Ventilation for buildings — Performance testing of components/products for residential
ventilation — Part 9: Externally mounted humidity controlled air transfer device
EN 13141-10:2008, Ventilation for buildings — Performance testing of components/products for
residential ventilation — Part 10: Humidity controlled extract air terminal device
EN IEC 61591:2023, Cooking fume extractors — Methods for measuring performance (IEC 61591:2023)
EN ISO 16890-1:2016, Air filters for general ventilation — Part 1: Technical specifications, requirements
and classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)
EN ISO 16890-2:2022, Air filters for general ventilation — Part 2: Measurement of fractional efficiency and
air flow resistance (ISO 16890-2:2022)
EN ISO 16890-3:2024, Air filters for general ventilation — Part 3: Determination of the gravimetric
efficiency and the air flow resistance versus the mass of test dust captured (ISO 16890-3:2024)
EN ISO 16890-4:2022, Air filters for general ventilation — Part 4: Conditioning method to determine the
minimum fractional test efficiency (ISO 16890-4:2022)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12792:2003 and the following
apply.
ISO and IEC maintain terminology 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
externally mounted air transfer device
device designed to allow the passage of air through the building envelope with the minimum ingress of
rain, snow, foreign bodies, etc.
[SOURCE: EN 12792:2003, definition 144]
3.2
internally mounted air transfer device
device designed to allow the passage of air between two internal spaces
[SOURCE: EN 12792:2003, definition 232]
3.3
exhaust air terminal device
device through which air leaves the treated space
3.4
supply air terminal device
device through which air enters the treated space
[SOURCE: EN 12792:2003, definition 349, modified — The second sentence has been removed.]
3.5
range hood
cooker hood
device intended to collect contaminated air from above a cooking appliance and either discharge it into
the room or remove it from the room
Note 1 to entry: It may or may not incorporate one or more of the following components:
— filter (essential when the contaminated air is discharged into the room);
— fan;
— fire damper;
— non return flow damper.
[SOURCE: EN 12792:2003, definition 85]
3.6
cowl
air terminal device with or without moving component, intended to be fitted on top of an exhaust duct,
with aim, by creating negative pressure depending on the wind speed, to avoid reverse flow and to
increase the extracted flow rate in presence of wind
[SOURCE: EN 12792:2003, 92, modified — Reformulation of the definition in a single sentence.]
3.7
roof outlet
air terminal device without moving component, intended to be fitted on top of an exhaust duct
[SOURCE: EN 13141-5:2020, definition 3.4]
3.8
ventilation system package
combination of compatible components which are tested, delivered and installed as specified, to complete
a residential ventilation system when sold as a single product
Note 1 to entry: It may exclude minor parts such as tapes, sealants and screws.
Note 2 to entry: This definition applies for single dwelling.
3.9
bidirectional ventilation unit
ventilation unit which produces an air flow between indoors and outdoors and is equipped with both
exhaust and supply fans
3.10
unidirectional ventilation unit
ventilation unit with a fan assisted air volume flow in only one direction (either supply or exhaust)
Note 1 to entry: The balancing air volume flow is provided by air transfer devices or another mechanical unit.
4 Symbols and abbreviations
For the purposes of this document, the symbols given in EN 12792:2003 and the following apply.
Symbol Designation Unit
c specific heat capacity of air at constant pressure and density kWh/(kg⋅K)
air
d thickness of the layer “i” m
i
COP coefficient of performance —
CTRL ventilation control factor —
DIS disbalance %
D + C airborne sound insulation dB
n,e,w tr
annual electricity consumption kWh/(m⋅a)
E
AEC
⋅a)
annual electricity consumption for defrosting kWh/(m
E
defr
annual electricity consumption due to internal pressure loss during kWh/(m⋅a)
E
el,preh
frost periods
EE weighted energy efficiency —
w
annual electricity consumption for an electric preheater kWh/(m⋅a)
Epreh
Epump,defr annual electricity consumption use for defroster pump kWh/(m⋅a)

annual electricity consumption use due to external pressure losses kWh/(m⋅a)
E∆p,ext,defr
of external defrosting devices
annual electricity consumption due to internal pressure loss during kWh/(m⋅a)
E∆p,int,defr
frost growing
f conversion factor between electrical and primary energy —
c
factor of the defrosting control —
f
ctrl,defr
correction value for the casing insulation —
f
insu
factor for the type of the defroster —
f
pump
factor for units conversion —
f
FC filter compensation factor —
F value of occurrence frequency for part load weighting —
i
L A-weighted sound power levels dB(A)
WA
aggregated general typology factor, incorporating factors for —
MISC
ventilation effectiveness, duct leakage and extra infiltration
pef primary energy factor —
p pressure at maximum air volume flow Pa
qvmax
p reference pressure Pa
ref
P electrical power input W
E
P electric power input at the reference volume flow W
E,ref
Symbol Designation Unit
3 a
PES primary energy saving kJ/m
P electrical power measured at q W
i vi
P maximum electrical power input W
E,max
electrical power input of the defroster pump W
P
pump
q measured air volume flow m
q mass flow rate kg/s
m
3 2
net ventilation rate demand m /(h⋅m )
q
net
3 2
q reference natural ventilation m /(h⋅m )
ref
q external leakage (ducted units only) %
ve
q air flow with an additional pressure drop of 1,5 times the initial m
vfc
pressure drop of the filter
qvi internal leakage %
3 b
q indoor/outdoor airtightness (non-ducted units only) m /s
vio
q maximum air volume flow m /s
vmax
q nominal air volume flow m /s
vn
q reference air volume flow m /s
vref
Q annual energy for defrosting kWh/(m⋅a)
defr
thermal resistance of the casing wall m⋅K/W
R
R indoor mixing %
mi
R outdoor mixing %
mr
R transfer ratio of recirculated air in the supply air stream %
s
R internal transfer ratio from extract to supply air %
s,int
R total transfer ratio in supply air %
s,tot
SPI specific power input W/(m /s)
SPI weighted specific power input part load W/(m /s)
w
ta
annual operating hours h/a
annual operating time in defrosting mode h/a

t
defr
total hours heating season h
t
h
v air flow sensitivity %
w internal leakage %
o outdoor mixing %
x
exponent that takes into account nonlinearity between thermal —
energy and electricity saving, depending on motor and drive
characteristics
x value of part load of rated air volume flow —
i
y indoor mixing %
Symbol Designation Unit
z external leakage %
annual saving in consumption of energy kWh/(m⋅a)
∆E
AHS
annual heating energy consumption for defrosting kWh/(m⋅a)
∆E
AH,defr
annual heating energy consumption for bypassing the heat recovery kWh/(m⋅a)
∆E
by
annual heating energy reduction by an earth to air heat exchanger kWh/(m⋅a)
∆E
earth
annual heating energy reduction by an electric preheater kWh/(m⋅a)
∆E
el,preh
annual heating energy consumption for increasing of the exhaust air kWh/(m⋅a)
∆E
ex
flow rate
annual heating energy consumption for preheating (by space kWh/(m⋅a)
∆E
h,preh
heating generation)
annual heating energy consumption for lowering of the supply air kWh/(m⋅a)
∆E
su
flow rate
annual heating energy reduction by ventilator heat kWh/(m⋅a)
∆E
vent
pressure loss of the external defrosting devices Pa
∆p
ext,defr
Δp pressure drop Pa
fc
average additional internal pressure due to frost growing Pa
∆p
frost
Δp initial pressure drop of the filter Pa
initial
Δp total rated pressure Pa
ref
average difference between the outdoor temperature and the K

∆T
defr
defrost mode set point during the defrosting period
average difference in indoor and outdoor temperature over a K
∆T
h
heating season, minus correction for solar and internal gains
correction for solar and internal gains °C
∆θ
g,h,avg
c
η temperature ratio %
t
η temperature ratio —
θ
η overall efficiency of the heating system —
g
average space heating efficiency —
η
h
thermal efficiency of heat recovery —
η
t
difference in thermal efficiency of heat recovery with a bypass —
∆η
t,by
compared to balanced mass flows
difference in thermal efficiency of heat recovery with an increased —
∆η
t,dec
exhaust air flow rate compared to balanced mass flows
difference in thermal efficiency of heat recovery with a lowered —
∆η
t,low
supply air flow rate compared to balanced mass flows
ventilator efficiency —
η
vent
Symbol Designation Unit
corrected temperature ratio on supply air side —
η
η temperature ratio on supply air side —
θ,su
temperature ratio on exhaust air side —
η
θ ,ex
average outdoor temperature over a heating season °C
θ
e,h,avg
average indoor temperature over a heating season °C
θ
I,avg
thermal conductivity of the material of the layer “i” W/(m⋅K)
λ
i
a 3 3
W/(m /s) or W/(m /h) can be used for measurement of primary energy saving but it shall be verified
that all parameters are consistent with the chosen unit.
b 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.
c
Symbol ηt is used in EU 1253/2014 and EU 1254/2014.
For the purposes of this document, the following abbreviations apply.
AEQ Codification of Additional Equipment
CTRL Control Factor
DCV Demand Controlled Ventilation
DIS Disbalance
DIU Declared Intended Use
HRS Humidity Ratio on Supply air side
LWC Sound power level
LWD Duct connection sound power level
MFB Mass Flow Balance
POM Power input in Operable Mode
PES Primary Energy Saving
PSM Power input in Standby Mode
SEC Specific Energy Consumption
SEC* Extended Specific Energy Consumption
SPI Specific Power Input
ASI Airborne Sound Insulation
TRE Temperature Ratio on the Exhaust air side
TRS Temperature Ratio on Supply air side
5 Performance characteristics for residential ventilation components/products
5.1 General
5.1.1 Generality for tests
The results of product performance tests reflect the performance that is achieved by the product in
service. A product shall therefore be tested as a complete assembly with all necessary components that
affect performance.
Accessories are sometimes available for a product as an option. Where accessories could affect
performance, the product shall be tested both with and without those accessories.
If any insect screen, filter or similar device is intended to be fitted in the product, then it shall be in
position when the product is tested.
5.1.2 Outdoor mixing (for supply and exhaust units)
5.1.2.1 Outdoor mixing of non-ducted units
Due to the small dimensions of non-ducted units the distance between the air inlets and air outlets can
be very small and thus there is a risk of mixing exhaust air with outdoor air. This concerns also alternating
ventilation units.
The outdoor mixing shall be measured and stated in accordance with EN 13141-8:2022.
5.1.2.2 Outdoor mixing of ducted units
The outdoor mixing rate of ducted units shall not be considered. The impact depends on installation
aspects.
5.1.3 Indoor mixing (for supply and exhaust units)
5.1.3.1 Indoor mixing of non-ducted units
Due to the small dimensions of non-ducted units the distance between the air inlets and air outlets can
be very small and thus there is a risk of mixing extract air with supply air. The indoor mixing shall be
measured and stated in accordance with EN 13141-8:2022.
5.1.3.2 Indoor mixing of ducted units
The indoor mixing rate of ducted units shall not be considered. The impact depends on installation
aspects.
5.1.4 Correction of temperature ratio (for supply and exhaust units)
All the leakages, mixing and flow balance variations have an influence on the temperature ratio. Starting
from the measured air flow, q , and the temperature ratio, η , on supply air, the temperature ratio shall
v θ,su
be corrected depending on the value in % of:
— η temperature ratio on supply air side, also named η ;
θ,su t
NOTE 1 ηt is used without correction in regulations EU 1254/2014 and EU 1253/2014.
— w of the internal leakage (see Table 19 to Table 21 or Table 32 depending on design);
— o of the outdoor mixing (see Table 32);
— y of the indoor mixing (see Table 32);
— z of the external leakage (see Table 19 to Table 21 or Table 32 depending on design);
— v of the air flow sensitivity at reference air volume flow at reference pressure ± 10 Pa, the highest
value shall be taken, (for non-ducted unit according to EN 13141-8:2022 and for ducted unit
calculated from air volume flow pressure curve according to EN 13141-7:2021);
according to Table 2.
Each value of the temperature ratio shall be documented.
The Temperature Ratio on Supply air side (TRS) shall be the corrected temperature ratio η .
NOTE 2 If the impact of leakage, mixing, and air flow sensitivity is considered in EPBD calculation procedures
then η could be documented. If this impact is not considered, then η could be used.
θ,su 5
Table 2 — Temperature ratio correction at reference air volume flow
Temperature ratio correction
Measure Result Unit
Non-ducted units Ducted units
Temperature ratio on
ηθ,su — —
supply air side
Internal leakage w — η = η × (1 – 0,7 × (w – 0,03))
1 θ,su
a
Outdoor mixing o — η = η × (1 – (o-0,02)) η = η
2 1 2 1
a
Indoor mixing y — η = η × (1 – (y-0,02)) η = η
3 2 3 2
b
External leakage z — η = η
4 3
0,4
Air flow sensitivity v — η = η × (1 – (v-0,02))
5 4
a
The outdoor mixing depends on the duct system and not on the unit. There is no mixing in typical
installations.
b
The impact of external leakage
...