CEN/TC 156/WG 2 - Natural and mechanical powered residential ventilation

This document specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal, acoustic and the electrical performance characteristics of non-ducted mechanical supply and exhaust residential ventilation units used in single dwellings.
The purpose of this document is not to consider the quality of ventilation but to test the performance of the equipment.
This document is applicable to ventilation units, the latter:
a) containing either:
- fans for mechanical supply and exhaust;
- air filters;
- air-to-air heat exchanger for heat and possibly humidity recovery;
- control system;
- inlet and outlet grilles; or
- alternating heat exchangers which provide separate supply and exhaust air flows;
b) provided either:
- in one assembly; or
- in more than one assembly, the separate assemblies of which are designed to be used together.
This document does not deal with ducted units which are covered by EN 13141-7 or units with heat pumps.
Safety requirements are given in EN 60335-2-40 and EN 60335-2-80.

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 shall be 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 EN Standards, and gives an overview of the test standards. Distinction between mandatory and optional requirement is left to each European and national regulations.
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, EN 13141-6:2014 and EN 13141-11;
-   ducted mechanical bidirectional residential ventilation units according to EN 13141-7:2021;
-   non-ducted mechanical bidirectional residential ventilation units according to prEN 13141 8:2020.
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 European Standard 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 European Standard 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.

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 EN 13141 8:2021.

This document specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal, acoustic and electrical performance characteristics of ducted mechanical supply and exhaust residential ventilation units.
NOTE   Such units are referred to as bidirectional ventilation units in EN 13142:2021.
This document is applicable to unit that contain at least, within one or more casing:
-   fans for mechanical supply and exhaust;
-   air filters;
-   air-to-air heat exchanger and/or air-to-air heat pump for air heat recovery;
-   control system.
Such unit can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
Examples of different possible arrangements of heat recovery, heat exchangers and/or heat pumps are described in Annex A.
This document covers ventilation units with continuous mass flows for each setting point.
This document does not deal with non-ducted units that are treated in prEN 13141-8:2021.
This document does not cover ventilation systems that may also provide water space heating and hot water that are treated in EN 16573.
This document does not cover units including combustion engine driven compression heat pumps and absorption heat pumps.
Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80.

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).

This document specifies checks and measurement methods in order to verify the fitness for purpose of installed ventilation systems in dwellings. It can be applied to commissioning of new systems and performance testing of existing systems. It provides choice between simple test methods, when sufficient, and extensive measurements, when necessary.
Considering that this document has been developed for large scale application and considering the practical conditions of field measurements, no correction regarding ambient conditions (temperature and barometric pressure) is applied to functional measurements.
This document deals with items d), e), f), and g) of the following list giving the different stages of the design, installation, checking and measuring of a ventilation system:
a)   design and dimensioning of residential system;
b)   installation of system;
c)   balancing and adjustment of system;
d)   pre-checks on system;
e)   functional checks on system;
f)   functional measurements on system;
g)   special measurements on system if required.
This document applies to ventilation systems (mechanical, hybrid, natural) comprising any of the following elements:
- air terminal devices (supply, extract, intake and exhaust);
- air transfer devices (externally mounted, internally mounted);
- controls;
- ducts;
- fans;
- filters;
- heat recovery;
- heating/cooling of supply air;
- recirculation air;
- cooker hood;
- cowls;
- dampers;
- sound reduction devices.
In case of multi-functional units, the checking and measuring only apply to the ventilation part. Therefore, this document does not apply to:
- heating systems and their control;
- refrigerating systems and their control;
- electrical power supply systems.
It does not cover the following points:
- airtightness of the building envelope; the whole dwelling and the individual room ventilation rates can be influenced by air infiltration through the building envelope (see EN ISO 9972);
- effect of the ventilation system on indoor air speed within the occupied zone (see for example EN 15726).

This document specifies laboratory methods for testing externally and internally mounted air transfer devices operating under pressure differences.
This document applies to air transfer devices of the following types:
- air transfer devices with fixed opening(s);
- air transfer devices with manually adjustable opening(s);
- air transfer devices with pressure difference controlled opening(s);
- window openings specifically designed to act as an air transfer device.
This document describes tests intended to characterize the following:
- flow rate/pressure;
- equivalent area
- reverse flow ability;
- air tightness when closed;
- free area;
- air diffusion in the occupied zone;
- sound insulation;
- water tightness.
This document does not apply to evaluation of:
- air filtration;
- condensation risk;
- noise production.

This document specifies methods for measuring the main performance characteristics of range hoods for residential use. It applies to air extraction range hoods without fan.
This document does not specify:
-   values for performance characteristics;
-   safety requirements in relation with the use of methyl-ethyl ketone (MEK).
For air extraction range hoods with fan see IEC 61591

This document gives guidelines to correct the measured air flow rate when measuring conditions are different from standard conditions.
It applies to a power-law formula giving the air flow rate as a function of a pressure difference with an air flow rate coefficient, C, varying with temperature and pressure.
This document applies to:
-   passive elements of air distribution systems with a cross-section area that does not depend on pressure;
-   volume flow rate (and not mass flow rate).
This document is applicable to (but not limited to):
- EN 1507, Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage;
- EN 1751, Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves;
- EN 12237, Ventilation for buildings - Ductwork - Strength and leakage of circular sheet metal ducts;
- EN 13141 1, Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 1: Externally and internally mounted air transfer devices;
- EN 13141 2, Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 2: Exhaust and supply air terminal devices;
- EN 13141 9, Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 9: externally mounted humidity controlled air transfer device;
- EN 13141 10, Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 10: humidity controlled extract air terminal device;
- EN 15727, Ventilation for buildings - Ducts and ductwork components, leakage classification and testing.
This document does not apply to:
-   fans;
-   air terminal devices with automatically controlled openings (variable openings).

This European standard specifies aerodynamic, acoustic and electrical power performance test measurements for un-ducted / ducted continuous supply ventilation / supply air ventilation units in a single room or a single dwelling used in residential ventilation.
In general such units contain:
- fan;
- air filter;
- control system.
Units may also include:
- grille or air distribution device;
- heating device;
- solar or thermal collectors (water or air);
- electrical;
- hydronic;
- sound attenuators;
- bypass dampers;
- mixing devices.
Supplementary heating may also be provided by solar air collector air or ground source heat pumps etc., the performance of these supplementary components are not covered by this standard.

This European Standard specifies laboratory methods for measuring the aerodynamic and acoustic performance characteristics and energy consumption of assembled exhaust ventilation system packages for a single dwelling. If a component of the package is not physically linked to the others (e.g. air inlets), then it is assumed to have been tested according to the test method related to this component. An example of a typical exhaust package is given in Figure 2.
The object of this European Standard is to provide tested characteristics for a ventilation system package in worst case conditions. It is assumed that better values are achieved on site when the ventilation system package is installed in accordance with the manufacturer's instruction and within the limits of the test conditions given in this standard.
Safety requirements are given in EN 60335-2-80.

This European Standard specifies laboratory methods for testing exhaust and supply air terminal devices operating under pressure differences.
It applies to devices used in mechanical and natural residential ventilation systems, of the following types:
-   device with a manually adjustable opening; or
-   device with a fixed opening; or
-   pressure difference controlled device.
It describes tests intended to characterize:
-   flow rate/pressure;
-   air diffusion characteristics (for supply air terminal devices);
-   noise production for components of systems;
-   insertion loss of component of systems;
-   sound insulation.

This European Standard sets out criteria to assess the performance of residential ventilation systems (for new, existing and refurbished buildings) which serve single family, multi family and apartment type dwellings throughout the year.
This European Standard specifies ways to determine performance criteria to be used for design levels in regulations and/or standards.
These criteria are meant to be applied to, in particular:
- mechanically ventilated building (mechanical exhaust, mechanical supply or balanced system);
- natural ventilation with stack effect for passive ducts;
- hybrid system switching between mechanical and natural modes;
- windows opening by manual operation for airing or summer comfort issues.
This European Standard considers aspects of hygiene and indoor air quality.
Health risk from exposure to tobacco smoke is excluded from this European Standard.

This European Standard specifies laboratory methods for testing humidity controlled exhaust air terminal devices.
This European Standard applies to all controlled devices on indoor humidity, used in mechanical and natural powered residential ventilation systems. For instance, devices of the following types:
   humidity controlled devices with a manually adjustable opening;
   humidity controlled devices with fixed setting;
   humidity controlled devices self-adjusting on pressure difference.
This European Standard describes tests intended to characterize:
   aero and hygro-dynamic performance;
   acoustic characteristics (including noise production of the device; insertion loss of the device; sound insulation);
   time response.

This European Standard specifies laboratory methods for testing humidity controlled air inlets operating under pressure differences.
It applies to all devices located between one room and outside and controlled on indoor humidity. For instance, devices of the following types:
   humidity controlled devices with fixed setting;
   manually openable or closable humidity controlled devices;
   humidity controlled devices self-adjusting on pressure difference.
It describes tests intended to characterise:
   aero and hygro-dynamic performance;
   air tightness when closed (for closable humidity controlled air inlet);
   air diffusion in the occupied zone;
   sound insulation;
   time response.
This European Standard does not apply to the evaluation of air filtration, condensation risk and noise production.

This Technical Report specifies recommendations for the performance and design of ventilation systems which serve single family, multi family and apartment type dwellings during both summer and winter. It is of particular interest to architects, designers, builders and those involved with implementing national, regional and local regulations and standards.
Four basic ventilation strategies are covered; natural ventilation, fan assisted supply air ventilation, fan assisted exhaust air ventilation and fan assisted balanced air ventilation. Combinations of these systems are not excluded and a ventilation system may serve only one dwelling (individual system) or more than one dwelling (central system). The ventilation aspects of combined systems (ventilation with heating and/or cooling) are covered.
The ventilation of garages, common spaces, roof voids, sub-floor voids, wall cavities and other spaces in the structure, under, over or around the living space are not covered.
Ventilation systems covered by this Technical Report may affect the entry and dilution of radon and other gases from the ground but these effects are not covered in this Technical Report. Ventilation systems designed to reduce the entry of radon and other gases from the ground are not covered by this Technical Report.

This European Standard specifies and classifies the component/product performance characteristics which may be necessary for the design and dimensioning of residential ventilation systems to provide the predetermined comfort conditions of temperature, air velocity, humidity, hygiene and sound in the occupied zone.
It defines those performance characteristics (mandatory or optional) which shall be determined and measured and presented according to relevant test methods. It will provide a classification scheme which lead to a full definition of product properties based on European test methods described in various EN standards and gives an overview of the Test Standards in various CEN TC´s. Distinction between mandatory and optional requirement is left to each national regulations. This standard gives an informative national annex in which the member states define the valid parameters.
The codification part in Clause 8 and the classification part in Clause 9 apply to the following products:
-   mechanical supply and exhaust unit according to EN 13141-7 and EN 13141-8.
This standard does not apply to other products such as filters, fire dampers, ducts, control devices, sound attenuators, which may also be incorporated in residential ventilation.
This standard does not cover requirements raised by European directives, for example: Low voltage directive, EMC directive and other requirements such as corrosion, resistance and snow penetration.

2013-04-25: WI deleted following cancellation of equivalent ISO project.
2011-02-21 EMA: // final draft received in ISO/CS (see notification from 2011-02-18 in dataservice).

This European Standard specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical power of an un-ducted mechanical supply and exhaust ventilation unit used in a single room.
The purpose of this European Standard is not to consider the quality of ventilation but to test the performance of the equipment.
In general, a ventilation unit contains:
- supply and exhaust air fans;
- air filters;
- air to air heat exchanger or air storage mass for exhaust air heat and humidity recovery;
- control system;
- inlet and outlet grilles.
Such equipment can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
Such equipment can contain alternating heat exchangers which provide separate supply and exhaust air flows.
In certain cases, i.e. alternating ventilation unit, the manufacturer may recommend that the equipment can be installed in such a way that it serves more than one room. For the purpose of this European Standard, these products are assessed in a single room.
This European Standard does not deal with ducted units or units with heat pumps.
Safety requirements are given in EN 60335 2 80:2003 [2].

This European Standard specifies and classifies the component/product performance characteristics which may be necessary for the design and dimensioning of residential ventilation systems to provide the predetermined comfort conditions of temperature, air velocity, humidity, hygiene and sound in the occupied zone.
It defines those performance characteristics (mandatory or optional) which shall be 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 EN Standards and gives an overview of the Test Standards. Distinction between mandatory and optional requirement is left to each national regulations.
The codification part in Annex A and the classification part in Clause 4 apply to the following products:
-   mechanical supply and exhaust ventilation units for single dwellings according to EN 13141-7;
-   un-ducted mechanical supply and exhaust ventilation units for a single room according to EN 13141-8.
This European Standard 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 European Standard does not cover requirements raised by European Directives, for example: low voltage directive, EMC directive and other requirements such as corrosion, resistance and snow penetration.

This European Standard specifies aerodynamic, acoustic and electrical power performance test methods for fans used in residential ventilation. These methods primarily concern:
- ventilation fans installed on a wall or in a window without any duct;
- ventilation fans installed in the downstream of a duct;
- ventilation fans installed in the upstream of a duct;
- ventilation fans installed in a duct;
- encased ventilation fans having several inlets.
For acoustic performance testing one of the following methods is used:
- in-duct method;
- reverberant room method;
- enveloping surface method.

This part of EN 13141 specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical performance characteristic of a mechanical supply and exhaust ventilation units used in a single dwelling.
It covers unit that contain at least, within one or more casing:
-   supply and exhaust air fans;
-   air filters;
-   air-to-air heat exchanger and/or Extract Air-to-Outdoor Air heat pump for extract air heat recovery;
-   control system.
Such unit can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
The different possible arrangements of heat recovery heat exchangers and/or heat pumps are described in Annex A.
This standard does not deal with non-ducted units or reciprocating heat exchangers.
This standard does not deal with units that supply several dwellings.
This standard does not cover ventilation systems that may also provide water space heating and hot water.
This standard does not cover units including combustion engine driven compression heat pumps and absorption heat pumps.
Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80.

This document specifies methods for measuring the aerodynamic and acoustic characteristics of cowls and roof outlets used in both natural and mechanical ventilation. Only those cowls and roof outlets fitted onto ducts which project above the roof surface are covered by the present standard.
Regarding the assisted cowls, only the fan assisted cowls are covered by the present standard, other types (such as injection assisted cowls) being too recent to be adequately considered for the time being.
The performance testing of the "assistance" provided by the auxiliary fan of an assisted cowl is excluded for the scope of this standard.

This European Standard specifies checks and test methods in order to verify the fitness for purpose of installed ventilation systems in dwellings. It can be applied to commissioning of new systems and performance testing of existing systems. The standard enables the choice between simple test methods, when sufficient, and extensive measurements, when necessary. The standard applies to mechanical and non-mechanical (natural) ventilation systems comprising any of the following: - passive stack ventilation ducts, - air terminal devices (supply, exhaust), etc.

This European standard specifies laboratory methods for testing externally and internally mounted air transfer devices operating under pressure differences. It applies to any devices located between two spaces (between one room and outside, or between two rooms) such as: - devices with fixed opening(s); - devices with manually adjustable opening(s); - devices with pressure difference controlled opening(s). It describes tests intended to characterize the following: - flowrate/pressure; - air diffusion; - air leakage (for closeable externally mounted air transfer device); - sound reduction;...

This European standard specifies methods for measuring the main performance characteristics of range hoods for residential use. It applies to recirculating range hoods, air extraction range hoods incorporating a fan and air extraction range hoods without fan. This standard does not specify values for performance characteristics. Safety Requirements are specified in EN 60335-2-31.

This European standard specifies laboratory methods for measuring the aerodynamic and acoustic performance characteristics and energy consumption of assembled exhaust ventilation system packages for single dwelling.  The object of this standard is to provide tested characteristics for a system package in extreme conditions to enable the user to be assured that the same values will be achieved on site when the system package is installed in accordance with the manufacturer's instruction and within these limits of the test conditions.

This European Standard specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical power of a un-ducted mechanical supply and exhaust ventilation unit used in a single room.
In general, such a unit contains:
¾   supply and exhaust air fans;
¾   air filters;
¾   air to air heat exchanger for exhaust air heat recovery;
¾   control system.
Such equipment can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
This European Standard does not deal with ducted units or units with heat pumps.
Safety requirements are given in EN 60335-2-80.

This European Standard specifies the component/product performance characteristics which may be necessary for the design and dimensioning of residential ventilation systems to ensure the predetermined comfort conditions of temperature, air velocity, humidity and sound in the occupied zone. It defines those performance characteristics which shall be measured and presented according to relevant test methods, and other performance characteristics which are optional but which may be required, e.g. to comply with local or national regulations.

This European standard specifies performance test methods for fans used in the residential ventilation. These methods primarily concern: a) Ventilation fans installed on a wall or in a window without any duct; b) Ventilation fans installed in the downstream of a duct; c) Ventilation fans installed in the upwardstream of a duct; d) Ventilation fans installed in a duct; e) Encased fans having several inlets. This standard defines for each type of fan, the acoustic testing methods. The following method can be used: a) In duct method; b) Reverberant field method; c) Free field or semi-reverberant method.

This part of prEN xxxxx specifies the laboratory test methods and test requirements for testing of Aerodynamic, Thermal and Acoustic performances, and Electrical Power of a mechanical Supply and Exhaust ventilation unit used in a single dwelling. In general such a unit contains: - supply and exhaust air fans, - air filters, - air to air heat exchanger with/without air to air heat pump for exhaust air heat recovery, - control system. Such equipement can be provided in more than one assembly, the separate assemblies of which are designed to be used together.

This European Standard specifies laboratory methods for testing flowrate and noise production of exhaust and supply air terminal devices operating under pressure differences. It applies to devices used in mechanical systems and passive stack systems. The device may be one of the following - device with a manually adjustable opening or, - device with a fixed opening or, - pressure difference controlled device.

This European Standard provides a vocabulary and defines categories for general purpose industrial fans and their component parts. It is applicable to any fan used for industrial purposes, including the ventilation of buildings and mines, but excluding ceiling, pedestal and similar circulation types of fans such as those commonly used for non-industrial purposes.

This European Standard specifies size designations for industrial fans and specifies dimensions for the circular and rectangular flanges of
general purpose industrial fans as defined in 3.1.1. It does not apply to cross-flow fans, or fan appliances used for household or similar
applications.
For circular flanges, this International Standard provides two different flange series, one for standard casing thicknesses and a second for heavy duty fans as used on board sea-going vessels or in heavy industry. In order not to restrict fan designs unduly, only the pitch diameter, hole numbers and hole diameters are standardized. Flange thickness as well as internal and external flange diameters can be chosen freely within the limits of good engineering practice.

This Standard specifies methods to calculate basic whole house air flow rates for single family houses and individual apartments up to the size of approximately 1 000 m3, to be used for applications such as energy loss calculations, heat load calculations and indoor air quality evaluations. The same basic methods apply for these different applications, the input parameter values being selected according to the requirements of the specific application.