EN 16573:2017

Ventilation for Buildings - Performance testing of components for residential buildings - Multifunctional balanced ventilation units for single family dwellings, including heat pumps

This European Standard specifies the laboratory test methods and test requirements for aerodynamic, energy rating and acoustic performance, of multifunctional balanced units intended for use in a single dwelling.
In the case of units consisting of several parts, this standard applies only to those designed and supplied as a complete package with the mount instructions.
It covers units that contain at least, within one or more casing:
-   supply and exhaust air fans;
-   air filters
-   common control system;
and one or more of the additional components:
-   air to water heat pump;
-   air to air heat pump;
-   air-to-air heat exchanger.
Units including only an air to air heat exchanger and/or an exhaust air to supply air heat pump are covered by EN 13141 7.
A non-exhaustive list of possible configurations of multifunctional units covered by this standard is given in Clause 5.
The standard does not cover the thermal aspects of humidity transfer in the air-to-air heat exchanger.
This standard does not deal with non-ducted units on supply and extract air side.
This standard does not deal with collective units (centralized or semi-centralized systems)
These multifunctional balanced units can be connected to ground heat exchanger for air preheating, solar collector or other heating systems. This standard does not cover the testing with these additional components.
This standard does not cover units including combustion engine driven compression heat pumps and sorption heat pump.

Lüftung von Gebäuden - Leistungsprüfung von Bauteilen für Wohnbauten - Multifunktionale Zu-/Abluft-Lüftungseinheiten für Einzelwohnungen, einschließlich Wärmepumpen

Diese Europäische Norm legt die Laborprüfverfahren und -anforderungen für die aerodynamische, energie¬kennzahlbezogene und akustische Leistung von multifunktionalen, abgeglichenen Lüftungseinheiten für die Verwendung in Einzelwohnungen fest.
Im Fall von Einheiten, die aus mehreren Bauteilen bestehen, gilt diese Norm ausschließlich für diejenigen Teile, die als Komplettpaket mit Montageanleitung entwickelt und geliefert werden.
Die Norm deckt Einheiten ab, die in mindestens einem oder mehreren Gehäusen folgendes enthalten:
-   Zu- und Fortluftventilatoren;
-   Luftfilter;
-   gemeinsames Steuerungssystem;
und ein oder mehrere der zusätzlichen Bauteile:
-   Luft-Wasser-Wärmepumpe;
-   Luft-Luft-Wärmepumpe;
-   Luft-Luft-Wärmetauscher.
Einheiten, die lediglich einen Luft-Luft-Wärmetauscher und/oder eine Fortluft-Zuluft-Wärmepumpe umfas¬sen, fallen unter EN 13141 7.
Eine nicht vollständige Liste der möglichen Konfigurationen von multifunktionalen Einheiten, die unter diese Norm fallen, wird in Abschnitt 5 bereitgestellt.
Die Norm berücksichtigt nicht die thermischen Aspekte der Feuchtigkeitsübertragung im Luft-Luft-Wärme¬tauscher.
Diese Norm behandelt keine Einheiten ohne Luftleitungen auf der Zu- und Abluftseite.
Diese Norm behandelt nicht Sammelsysteme (zentralisierte oder semi-zentralisierte Systeme).
Diese multifunktionalen abgeglichenen Einheiten können mit einem Erdwärmetauscher, um die Luft vorzu¬wärmen, Solarkollektor oder anderen Beheizungsarten verbunden werden. Die Norm berücksichtigt nicht die Prüfung dieser zusätzlichen Komponenten.
Die Norm berücksichtigt keine Einheiten, die Kompressionswärmepumpen mit Verbrennungsmotor und Sorp¬tionswärmepumpen umfassen.

Ventilation des bâtiments - Essais de performance des composants pour les bâtiments résidentiels - Centrales de ventilation double flux multifonctions pour les logements individuels, comprenant des pompes à chaleur

La présente Norme européenne spécifie les méthodes d'essai en laboratoire et les exigences d'essai relatives aux essais de performance aéraulique, acoustique et énergétique de dispositifs équilibrés multifonctionnels destinés à être utilisés dans un logement individuel.
Dans le cas de dispositifs composés d'éléments séparés, la présente norme ne s'applique qu'aux dispositifs conçus et fournis comme un ensemble avec les instructions de montage.
Elle couvre les dispositifs contenant, dans une ou plusieurs enveloppes, au moins :
-   des ventilateurs de soufflage et d'extraction d'air ;
-   des filtres à air ;
-   un système commun de régulation,
et un ou plusieurs des éléments supplémentaires suivants :
-   pompe à chaleur air/eau ;
-   pompe à chaleur air/air ;
-   échangeur thermique air/air,
Les dispositifs comprenant uniquement un échangeur thermique air/air et/ou une pompe à chaleur air extrait/air fourni, sont couverts par l'EN 13141-7.
Une liste non exhaustive de configurations possibles pour les dispositifs multifonctionnels couverts par la présente norme est donnée à l'Article 5.
La présente norme ne couvre pas les aspects thermiques du transfert de l'humidité dans l'échangeur thermique air/air.
La présente norme ne traite pas des dispositifs non raccordés du côté air fourni et air repris.
La présente norme ne traite pas des dispositifs collectifs (systèmes centralisés ou semi-centralisés).
Ces dispositifs équilibrés multifonctionnels peuvent être raccordés à un puits canadien pour préchauffage de l'air, à un capteur solaire ou à d'autres systèmes de chauffage. La présente norme ne couvre pas les essais effectués avec ces éléments supplémentaires.
La présente norme ne couvre pas les dispositifs comprenant des pompes à chaleur entraînées par un moteur à combustion et des pompes à chaleur à sorption.

Prezračevanje stavb - Preskušanje lastnosti sestavnih delov za stanovanjske stavbe - Večnamenske uravnotežene prezračevalne enote za posamična stanovanja, vključno s toplotnimi črpalkami

Ta standard določa laboratorijske preskusne metode in preskusne zahteve za aerodinamične, energetske in akustične lastnosti večnamenskih uravnoteženih enot za uporabo v eni stanovanjski enoti.
Pri enotah, sestavljenih iz več delov, se ta standard uporablja samo za tiste enote, ki so projektirane in dostavljene kot celoten paket z navodili za montažo.
Zajema enote, ki v enem ali več ohišjih vsebujejo vsaj:
dovodne in odvodne zračne ventilatorje,
zračne filtre,
običajni nadzorni sistem.
In enega ali več dodatnih sestavnih delov:
zračno/vodno toplotno črpalko,
zračno toplotno črpalko,
zračni izmenjevalnik toplote,
razen enot, vključno z zračnim izmenjevalnikom toplote in/ali odvodnim zrakom za oskrbo zračne toplotne črpalke, ki so že zajete v standardu EN 13141-7.
Neizčrpen seznam možnih konfiguracij večnamenskih enot, zajetih v tem standardu, je podan v točki 5.
Standard ne zajema toplotnih vidikov prenosa vlage v zračnem izmenjevalniku toplote.
Ta standard ne obravnava brezkanalnih enot na strani za dovod in odvod zraka.
Ta standard ne obravnava kolektivnih enot (centralizirani ali polcentralizirani sistemi).
Te večnamenske uravnotežene enote je mogoče povezati s talnim izmenjevalnikom toplote za predhodno segrevanje zraka, sončni zbiralnik ali druge ogrevalne sisteme. Ta standard ne zajema preskušanja teh dodatnih sestavnih delov.
Ta standard ne zajema enot, vključno s kompresijskimi toplotnimi črpalkami, ki jih poganja motor z notranjim izgorevanjem, ter absorpcijskimi in adsorpcijskimi toplotnimi črpalkami.

General Information

• Status: Published
• Publication Date: 31-Jan-2017
• Withdrawal Date: 30-Aug-2017
• ICS: 91.140.30 - Ventilation and air-conditioning systems
• Technical Committee: CEN/TC 156 - Ventilation for buildings
• Drafting Committee: CEN/TC 156/WG 16 - Joint Working Group between CEN/TC 156 and CEN/TC 113 - Multifunctional balanced ventilation units for single family dwellings, including heat pumps
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 03-Sep-2022
• Completion Date: 14-Apr-2025
• Mandate: M/560 - [C(2019) 1725 final] Ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coils in support of Commission Regulation (EU) 2016/2281
• Ref Project: SIST EN 16573:2017 - Ventilation for Buildings - Performance testing of components for residential buildings - Multifunctional balanced ventilation units for single family dwellings, including heat pumps

Overview

EN 16573:2017 - published by CEN - defines laboratory test methods and requirements for multifunctional balanced ventilation units for single‑family dwellings, including units that incorporate heat pumps. The standard covers aerodynamic, energy‑rating and acoustic performance of complete packaged units (supplied with mounting instructions) intended for use in a single dwelling. It is a laboratory test standard for manufacturers, test laboratories, certification bodies and HVAC designers focused on residential ventilation systems.

Key topics and requirements

• Scope and product coverage

  • Applies to packaged multifunctional balanced units that include at least: supply and exhaust fans, air filters, and a common control system.
  • Also covers units that optionally integrate: air-to-water heat pumps, air-to-air heat pumps and air-to-air heat exchangers.
  • Excludes non-ducted supply/extract units, collective (centralized/semi‑centralized) systems, combustion‑engine or sorption heat pumps, and tests with external ground heat exchangers or solar preheating components.

• Aerodynamic performance

  • Laboratory methods for measuring airflow/pressure curves, leakages, reference points for aerodynamic conditions and pressure‑drop settings.

• Thermal and energy rating

  • Test procedures for ventilation heat recovery, integration with hydronic space heating/cooling, supply‑air heating/cooling, and combined functions (heating + domestic hot water + cooling).
  • Covers configurations with different recirculation arrangements and defines data to be recorded and calculations for energy performance rating.

• Acoustic performance

  • Laboratory measurement of airborne noise and sound power for ventilation-only and combined‑function configurations.

• Test reporting

  • Required content of test reports including product specifications, aerodynamic curves, temperature ratios, performance data per function, leakages and acoustic characteristics.

Applications

• Product R&D and validation for manufacturers of residential ventilation units with integrated heat pumps.
• Independent laboratory testing and certification for compliance, labeling and performance claims.
• Specifying and procuring balanced ventilation systems for single‑family dwellings.
• HVAC consultants and energy assessors evaluating combined ventilation and heating/cooling performance in dwellings.

Who uses this standard

• HVAC and ventilation equipment manufacturers
• Accredited test laboratories and certification bodies
• Building services engineers and designers
• Energy assessors, product specifiers and procurement teams
• Regulators and conformity assessment organizations

Related standards

• EN 13141‑7 (air‑to‑air heat exchanger / exhaust‑to‑supply heat pump configurations)
• EN 12102 (measurement of airborne noise for heat pumps, air conditioners)
• EN 12792 (terminology and symbols for ventilation systems)

Keywords: EN 16573:2017, multifunctional balanced ventilation units, residential ventilation testing, heat pump ventilation, energy rating, acoustic testing, aerodynamic performance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2017
3UH]UDþHYDQMHVWDYE3UHVNXãDQMHODVWQRVWLVHVWDYQLKGHORY]DVWDQRYDQMVNH
VWDYEH9HþQDPHQVNHXUDYQRWHåHQHSUH]UDþHYDOQHHQRWH]DSRVDPLþQD
VWDQRYDQMDYNOMXþQRVWRSORWQLPLþUSDONDPL
Ventilation for Buildings - Performance testing of components for residential buildings -
Multifunctional balanced ventilation units for single family dwellings, including heat
pumps
Lüftung von Gebäuden - Leistungsprüfung von Bauteilen für Wohnbauten -
Multifunktionale Zu-/Abluft-Lüftungseinheiten für Einzelwohnungen, einschließlich
Wärmepumpen
Ventilation des bâtiments - Essais de performance des composants pour les bâtiments
résidentiels - Centrales de ventilation double flux multifonctions pour les logements
individuels, comprenant des pompes à chaleur
Ta slovenski standard je istoveten z: EN 16573:2017
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16573
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2017
EUROPÄISCHE NORM
ICS 91.140.30
English Version
Ventilation for Buildings - Performance testing of
components for residential buildings - Multifunctional
balanced ventilation units for single family dwellings,
including heat pumps
Ventilation des bâtiments - Essais de performance des Lüftung von Gebäuden - Leistungsprüfung von
composants pour les bâtiments résidentiels - Centrales Bauteilen für Wohnbauten - Multifunktionale Zu-
de ventilation double flux multifonctions pour les /Abluft-Lüftungseinheiten für Einzelwohnungen,
logements individuels, comprenant des pompes à einschließlich Wärmepumpen
chaleur
This European Standard was approved by CEN on 22 July 2016.

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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16573:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 6
3.1 Terms and definitions . 6
3.2 Symbols . 7
4 Functions . 8
5 Description and testing of multifunctional units. 8
6 Performance testing of aerodynamic characteristics . 13
6.1 Leakages . 13
6.1.1 Test method . 13
6.1.2 Requirements . 13
6.2 Air flow/pressure curve . 13
6.3 Reference point for aerodynamic conditions . 13
6.4 Pressure drop setting . 14
7 Performance testing of thermal characteristics . 15
7.1 General . 15
7.2 Air flow settings and uncertainty . 15
7.2.1 General . 15
7.2.2 Configuration without any recirculation . 16
7.2.3 Configuration with recirculation from outdoor air to exhaust air . 16
7.2.4 Configuration with recirculation from extract to supply air . 17
7.2.5 Configuration with two recirculations . 17
7.3 Ventilation heat recovery performance. 18
7.3.1 General . 18
7.3.2 Air flow test conditions . 18
7.3.3 Test procedure . 19
7.3.4 Data to be recorded . 19
7.3.5 Calculations . 21
7.4 Ventilation and domestic hot water production . 21
7.4.1 General . 21
7.4.2 Test procedure . 21
7.4.3 Data to be recorded . 22
7.4.4 Performance rating calculations . 24
7.5 Ventilation with hydronic space heating/cooling . 24
7.5.1 General . 24
7.5.2 Temperature test conditions . 25
7.5.3 Test procedure . 27
7.5.4 Data to be recorded . 27
7.5.5 Performance rating calculations . 29
7.6 Ventilation combined with supply air heating/cooling . 31
7.6.1 General . 31
7.6.2 Temperature test conditions . 31
7.6.3 Test procedure . 31
7.6.4 Data to be recorded . 32
7.6.5 Performance rating calculations . 34
7.7 Ventilation combined with both hydronic and supply air heating/cooling . 35
7.7.1 General . 35
7.7.2 Test procedure . 35
7.7.3 Data to be recorded. 36
7.7.4 Performance rating calculations . 39
7.8 Ventilation combined with heating and hot water production . 40
7.8.1 General . 40
7.8.2 Test procedure . 40
7.8.3 Data to be recorded. 42
7.8.4 Performance rating calculations . 45
7.9 Ventilation combined with cooling and hot water production . 48
7.9.1 General . 48
7.9.2 Test procedure . 48
7.9.3 Data to be recorded. 50
7.9.4 Performance rating calculations . 53
8 Performance testing of acoustic characteristics . 57
8.1 General . 57
8.2 Configurations to be tested . 57
8.3 Performance testing ventilation only . 57
8.4 Performance testing ventilation and hydronic heating . 57
8.5 Performance testing ventilation and supply air heating. 57
8.6 Performance testing ventilation and supply air heating and hydronic heating . 57
8.7 Performance testing ventilation and domestic hot water . 58
9 Test report . 58
9.1 General information . 58
9.2 Additional information . 59
9.3 Rating test results . 59
9.3.1 Product specifications. 59
9.3.2 Leakages . 59
9.3.3 Air flow/pressure curve . 59
9.3.4 Temperature ratios of ventilation function . 59
9.3.5 Performance data of ventilation and domestic hot water functions . 59
9.3.6 Performance data of ventilation and hydronic space heating and/or cooling. 59
9.3.7 Performance data of ventilation and air heating and/or cooling . 59
9.3.8 Performance data of ventilation with both hydronic and air heating/cooling . 59
9.3.9 Performance data of ventilation with heating and hot water production . 59
9.3.10 Performance data of ventilation with cooling and hot water production . 59
9.4 Acoustic characteristics . 60

European foreword
This document (EN 16573:2017) 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 August 2017, and conflicting national standards shall
be withdrawn at the latest by August 2017.
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.
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, 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 the United Kingdom.
1 Scope
This European Standard specifies the laboratory test methods and test requirements for aerodynamic,
energy rating and acoustic performance, of multifunctional balanced units intended for use in a single
dwelling.
In the case of units consisting of several parts, this standard applies only to those designed and supplied
as a complete package with the mount instructions.
It covers units that contain at least, within one or more casing:
— supply and exhaust air fans;
— air filters
— common control system;
and one or more of the additional components:
— air to water heat pump;
— air to air heat pump;
— air-to-air heat exchanger.
Units including only an air to air heat exchanger and/or an exhaust air to supply air heat pump are
covered by EN 13141-7.
A non-exhaustive list of possible configurations of multifunctional units covered by this standard is
given in Clause 5.
The standard does not cover the thermal aspects of humidity transfer in the air-to-air heat exchanger.
This standard does not deal with non-ducted units on supply and extract air side.
This standard does not deal with collective units (centralized or semi-centralized systems)
These multifunctional balanced units can be connected to ground heat exchanger for air preheating,
solar collector or other heating systems. This standard does not cover the testing with these additional
components.
This standard does not cover units including combustion engine driven compression heat pumps and
sorption heat pump.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 12102, Air conditioners, liquid chilling packages, heat pumps and dehumidifiers with electrically
driven compressors for space heating and cooling - Measurement of airborne noise - Determination of the
sound power level
EN 12792, Ventilation for buildings - Symbols, terminology and graphical symbols
EN 13141-7:2010, Ventilation for buildings - Performance testing of components/products for residential
ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including
heat recovery) for mechanical ventilation systems intended for single family dwellings
EN 14511 (all parts), Air conditioners, liquid chilling packages and heat pumps with electrically driven
compressors for space heating and cooling
EN 16147, Heat pumps with electrically driven compressors - Testing and requirements for marking of
domestic hot water units
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)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12792, EN 13141-7,
EN 14511-1 and EN 16147, and the following apply.
3.1.1
declared maximum air volume flow
maximum of the removed or fresh air volume flow corresponding to the declared total pressure of the
unit at the maximum setting, without any recirculation, for standard air conditions (20 °C, 101 325 Pa)
[SOURCE: EN 13141-7:2010, 3.1.4, modified — The beginning of the definition has been redrafted and
the expression “without any recirculation” has been added.]
3.1.2
declared total pressure difference
total pressure difference between the outlet and the inlet of the unit, without any recirculation, declared
by the manufacturer, and corresponding to 100 Pa or to a lower total pressure if the intended use
declared by the manufacturer is less than 100 Pa
[SOURCE: EN 13141-7:2010, 3.1.6, modified — The original term was “Ptud/2” and it was defined with
the beginning of the present definition.]
3.1.3
multifunctional balanced ventilation unit
unit intended for use in a single family dwelling to primary provide balanced ventilation and in addition
heating and/or cooling and/or hot water production and contains at least, within one or more modular
casing supply and exhaust air fans, air filters, common control system and one more of the additional
components, air to water heat pump, air to air heat pump, air-to-air heat exchanger
3.1.4
hydronic heating/cooling
heating or cooling supplied by a water or brine circuit
3.1.5
air heating/cooling
heating or cooling supplied by an air stream
3.1.6
air supply free cooling
recovering of cooling energy produced by the heat pump while producing hot water
Note 1 to entry: Hot water has priority.
3.1.7
reference fresh air volume flow
fresh air volume flow q at the reference point defined at p and 70 % of declared maximum air
V,ref,fresh tUd/2
volume flow
3.2 Symbols
ODA, 21 Outdoor Air
SUP, 22 Supply Air
RCA, Recirculation air (additional airflow for example for air heating or air cooling function)
ETA, 11 Extract Air
EHA, 12 Exhaust Air
OEA Outdoor to Exhaust Air (additional airflow for example to raise the thermal capacity of
the heat pump)
List of symbols
P capacity or power input, in kW
p declared total pressure, in Pa
tUd
Q thermal energy, in kWh
t time duration, in s or in h
W electrical work, in kWh
h specific enthalpy in kJ/kg
q mass flow rate, in kg/s
m
q volume flow rate, in m /h
v
T temperature in °C
List of indices used for the individual and combined functions in the symbols:
AC supply Air Cooling
AH supply Air Heating
AFC supply air free cooling
C cooling
WH (Domestic) hot water production
el electric
H heating
HC Hydronic Cooling
HH Hydronic Heating
HR heat recovery
V Ventilation
es stand by
The combination of indices indicates simultaneous operation of the corresponding functions.
4 Functions
A multifunctional ventilation unit provides ventilation for single dwelling as a leading function. This
means, that all additional functions:
— hydronic heating/air heating;
— hydronic cooling/air cooling;
— hot water production;
shall be operating only when ventilation is operating.
The multifunctional ventilation unit shall be designed and controlled to provide the hygienic ventilation
rate for a dwelling or part of a dwelling. That means for example, that the ventilation rate shall not be
controlled according to the hydronic heating demand.
If specified by the manufacturer, the unit may use an additional outdoor air volume flow, to provide a
higher thermal capacity if needed. This leads to two alternatives:
1) The higher outdoor air volume flow (outdoor exhaust air) does not affect the ventilation function
(fresh air and removed air).
Additional tests shall be performed according to the declaration of manufacturer. No further
correction needed
2) The air volume flows for ventilation (fresh air and/or removed air) increase. In this case the air
volume flows shall be measured and documented as a percentage of reference air volume flow.
NOTE This may be needed to allow a correction of system performance according to the EPBD calculation.
5 Description and testing of multifunctional units
Table 1 shows a non-exhaustive list of relevant combinations of multifunctional units with the
corresponding applicable test procedures according to Clause 6, 7 and 8 for thermal and acoustic
performance.
The leading function is ventilation at reference air volume flow. The heat pump can use any air source:
outdoor air, exhaust air, recirculation air or any mixture of these.
For testing the unit shall be installed according to the manufacturer instructions given in the
installation manuals unless otherwise specified in the referred standards for specific tests.
Table 1 — Units and test procedures
Description Function scheme Test procedure
Balanced ventilation (sub)clause:
including:
1. + Air to air heat Fully covered by
exchanger EN 13141–7
2. + Air to air heat pump Fully covered by
EN 13141–7
3. + Air to air heat Fully covered by
exchanger EN 13141–7
+ Air to supply air heat
pump
4. + Air to water heat Clause 6
pump for the
7.4
domestic hot water
8.3
production
8.7
Key
1 domestic hot
water
5. + Air to water heat Clause 6
pump for hydronic
7.5
heating or cooling
8.3
8.4
Key
1 water heating or
cooling
Description Function scheme Test procedure
Balanced ventilation (sub)clause:
including:
6. + Air to water heat Clause 6
pump for
7.4
alternative:
7.5
– hydronic heating
8.3
and cooling
8.4
– domestic hot
Key
water production
1 water heating or
cooling/domestic
hot water
7. + Air to water heat Clause 6
pump for
7.8
simultaneous:
8.3
– hydronic heating
8.6
or cooling
Key
– domestic hot
1 water heating or
water
cooling
2 domestic hot
water
8. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.6
pump for heating or
8.3
cooling with
8.5
recirculating air
9. + air to air heat Clause 6
exchanger
7.3
+ Air to water heat
7.4
pump for domestic
8.3
hot water
8.7
production
Key
1 domestic hot
water
10. + air to air heat Clause 6
exchanger
7.3
+ Air to water heat
7.5
pump for hydronic
8.3
heating or cooling
8.4
Key
1 water heating or
cooling
Description Function scheme Test procedure
Balanced ventilation (sub)clause:
including:
11. + air to air heat Clause 6
exchanger
7.3
+ Air to water heat
7.4
pump for
7.5
alternative:
8.3
– hydronic heating
8.4
or cooling
Key
– domestic hot
water production 1 water heating or

cooling/domestic
hot water
12. + air to air heat Clause 6
exchanger
7.3
+ air to water heat
7.8
pump for
8.3
simultaneous:
8.4
– hydronic heating
Key
or cooling
1 water heating or
– domestic hot
cooling
water production
2 domestic hot
water
13. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.6
pump for:
7.7
– supply air heating
7.8
or cooling
8.3
– for alternative:
8.6
– hydronic heating
Key
or cooling
1 water heating or
– domestic hot
cooling/ domestic
water
hot water
production
14. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.8
pump for:
8.3
– supply air heating
8.5
or cooling
Key
– domestic hot
1 domestic hot
water production
water
Description Function scheme Test procedure
Balanced ventilation (sub)clause:
including:
15. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.6.
pump for:
7.7
– supply air heating
7.8
or cooling
8.3
– for simultaneous:
8.6
– hydronic heating
Key
– domestic hot
1 water heating/
water
domestic hot water
production
16. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.7
pump for:
7.8
– supply air heating
8.3
or cooling
8.5
– domestic hot
Key
water production
1 domestic hot
With recirculation air
water
17. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.6
pump for:
7.7
– supply air heating
7.8
or cooling
8.3
– for alternative:
8.6
– domestic hot
Key
water
production 1 water heating or
cooling/Domestic
– hydronic heating
hot water
or cooling
With recirculation air
18. + air to air heat Clause 6
exchanger
7.3
+ Air source heat
7.4
pump for:
7.6
– supply air heating
7.9
or cooling and
8.3
simultaneous or
alternative 8.5
domestic hot
Key
water production
1 domestic hot
With recirculation air
water
NOTE EHA – Exhaust air, ETA – Extract air, ODA - Outdoor air, RCA – Recirculation air, SUP –
Supply air.
6 Performance testing of aerodynamic characteristics
6.1 Leakages
6.1.1 Test method
Pressure testing method applies to classify leakages of the unit as defined in EN 13141-7.
For internal leakage, if the pressure method is not applicable, e.g. units using recirculation air, the unit
shall be tested as category 2 heat exchanger (tracer gas method) in accordance with EN 13141-7.
6.1.2 Requirements
To set the declared maximum air volume flow, the declared total pressure shall correspond to 100 Pa,
or to a lower total pressure if the intended use declared by the manufacturer is less than 100 Pa.
The declared maximum air volume flow shall be equal to the smaller in case the supply and extract air
volume flows are different.
In addition, to assess correctly the thermal performance, aerodynamic characteristics shall be tested
before or together with any thermal characteristics testing.
Aerodynamic characteristics shall include:
— external leakage or total recirculated fraction in supply air;
— internal leakage or recirculated fraction from extract to supply air or total recirculated fraction in
supply air.
The tests for air flow/pressure curve and thermal performances shall not be made because of
measurement uncertainty when leakages according to 6.1.1 are too high. The external and internal
leakage of the unit shall comply with Class A1 or A2, B1 or B2, C1 or C2 as defined in EN 13141-7
depending on the test method.
6.2 Air flow/pressure curve
Tests shall be performed according to EN 13141-7 with the following parameters:
1) Ventilation function only:
That means the heat pump is not operating. Any additional fan is off and any bypass damper is
closed (q = 0 and q = 0) or any other recirculation air flow is off.
V, OEA V, RCA
2) Ventilation function with additional flow rates:
In case of additional air flow rates for the other functions the pressure curves shall be repeated
with different damper positions and/or additional fans speeds (minimum 3 settings in case of
stepless control). If the ventilation mode can be set independently from the recirculation mode,
then the ventilation setting is the intermediate setting as defined in EN 13141-7 (see Clause 1
above) During this test, pressure at each connection shall respect the repartition of 1/3 on the
outside and 2/3 on the inside.
6.3 Reference point for aerodynamic conditions
For all the thermal tests of the multifunctional unit, the reference fresh air volume flow point shall be
used.
In addition, if the multifunctional ventilation unit is operating with an additional outdoor air flow at the
evaporator (heating mode)/condenser (cooling mode) side, this additional air flow rate shall also be
specified by the manufacturer.
In addition, if the multifunctional ventilation unit is operating with an additional recirculation air flow
at the condenser (heating mode)/evaporator (cooling mode) side, this additional air flow rate shall also
be specified by the manufacturer. This situation is possible only if the recirculated air is separated from
extract air as the following Figure 1
Extract air is coming from kitchen, toilets, bathroom and shall not be recirculated in the house for
hygienic reasons
Figure 1 — Definition of reference fresh air volume flow
The reference fresh air volume flow q point shall be defined at p /2 and 70 % of declared
V, ref, fresh tUd
maximum air volume flow. If this point cannot be set, pressure shall remain at p /2 and airflow shall
tUd
be adjusted just over (see EN 13141-7).
Depending on the configurations as descripted in Figure 2 to Figure 5 (see 7.2) the reference fresh air
volume flow q is measured directly or calculated
V, ref, fresh I
Maximum air volume flow point shall be adjusted at p and declared maximum air volume flow,
tUd
without any recirculation. If this point cannot be set, pressure shall be adjusted just over p .
tUd
Minimum air volume flow point shall be adjusted at ptUd /2 and declared minimum air volume flow.
6.4 Pressure drop setting
The pressure drop is set in line with EN 13141-7. Assuming a quadratic relation between volume flow
and pressure drop, the ductwork is designed for a pressure drop of p at q . This approximately
tUd Vmax
results in a pressure drop of p /2 at 0,7 * q . This pressure is applied 1/3 on the outside and 2/3 on
tUd Vmax
the inside.
Adapted to the described cases, it has to be regarded that there can be varying volume flows coming
from the recycling air circuits. In order to compare results with EN 13141-7 and assuming that
ductwork is designed for maximum recycling volume flows, pressure at each connection shall be set at
the same value with or without recirculation, . An example is given in Table 2.
Table 2 —Pressure drop settings for each connection, example with p = 100 Pa
tud
Connection Pressure at Pressure at maximum Pressure at Pressure at reference
maximum air air volume flow reference air air volume flow
volume flow without recycling volume flow with without recycling
recycling
ETA 66 Pa 66 Pa x 33 Pa 33 Pa x
2 2
at at 0,7 *
q q
m1,1 max,w/o recyc m1,1 max,w/o recyc

q  q 
m1,1 max,w/recyc m1,1 max,w/recyc
 
q q
m1,1 max,w/ recyc m1,1 max,w/ recyc
 
at 0,7 * q
m1,1 max
EHA 33 Pa 33 Pa x 17 Pa 17 Pa x
2 2
at at 0,7 *
q q
m1,2 max,w/o recyc m1,2 max,w/o recyc

 
q q
m,12 max,w/recyc m,12 max,w/recyc
 
q q
m1,2 max,w/ recyc m1,2 max,w/ recyc
 
at 0,7 * q
m1,2 max
ODA 33 Pa 33 Pa x 17 Pa 17 Pa x
2 2
at at 0,7 *
 
q q
m2,1 max,w/o recyc m2,1 max,w/o recyc

 
q q
m2,1 max,w/recyc m2,1 max,w/recyc
 
q q
m2,1 max,w/ recyc m2,1 max,w/ recyc
 
at 0,7 * q
m2,1 max
SUP 66 Pa 66 Pa x 33 Pa 33 Pa x
2 2
at at 0,7 *
q q
m2,2 max,w/o recyc m2,2 max,w/o recyc
  at
q q
m2,2 max,w/recyc m2,2 max,w/recyc
 
q q
m2,2 max,w/ recyc m2,2 max,w/ recyc
 
0,7 * q
m2,2 max
RCA 33 Pa  17 Pa
at at 0,7 * q
m,RCA
q
mRCA max,w/recyc
7 Performance testing of thermal characteristics
7.1 General
Measurement period and stabilization criteria for measurements on the air side shall be made
according to EN 13141-7.
Measurement and stabilization criteria for any measurement when heat pump is running for hydronic
heating or hydronic cooling according to EN 14511 (all parts). That means that all energy quantities are
values measured over the data acquisition period.
The unit shall be tested according to the test procedure that describes the most comprehensive
combination of functions provided by the unit. The overall performance and the performance of each
function individually are calculated from this test.
7.2 Air flow settings and uncertainty
7.2.1 General
The removed air mass flow rate is set as the reference air volume flow as determined in 6.3.
Depending on the operation point, the fresh air mass flow can be calculated (see EN 13141-7).
Balancing between q and q is conducted only once for each configuration of air flows,
m, fresh air m, removed air
at the mandatory heating point (7 °C/20 °C) for all heating tests, with the heat pump out of operation.
Where applicable, balancing between q and q is conducted only once for each
m, fresh air m, removed air
configuration of air volume flows, at the mandatory cooling point (35 °C/27 °C) for all cooling tests,
with the heat pump out of operation
Any balancing dampers are locked firmly to prevent creep during the duration of the remaining tests. At
other outdoor temperatures, the balancing can be expected to deteriorate very slightly due only to
changes in the density of air in the supply and extract streams.
Thermal tests shall be performed with and/or without the additional outdoor air (q ) or
m, OEA
recirculated air (q ) as specified by the manufacturer. The temperature conditions of recirculation
m, RCA
air are the same as for extract air.
The total uncertainty of the airflow measurement shall not exceed ± 3 %.
The unit is declared unbalanced (see EN 13141-7) if the difference between the two air flows is greater
than 10 %.
7.2.2 Configuration without any recirculation
See Figure 2:
Key
qm,fresh air = qm,22 = qm,SUP
q = q = q
m,removed, air m,11 m,ETA
Figure 2 — Reference fresh/removed air volume flow without any circulation
7.2.3 Configuration with recirculation from outdoor air to exhaust air
See Figure 3:
Key
qm,fresh air = qm,22 = qm,SUP
q = q = q
m,removed, air m,11 m,ETA
q = q – q = q – q
m,OEA = m,EHA m,removed air m, 12 m,11
Figure 3 — Reference fresh/removed air volume flow with recirculation from outdoor air to
exhaust air
7.2.4 Configuration with recirculation from extract to supply air
See Figure 4:
Key
qm,fresh air = qm,21
q = q
m,removed air m,11
Figure 4 — Reference fresh/removed air volume flow with recirculation from extract to supply
air
7.2.5 Configuration with two recirculations
See Figure 5:
Key
qm,fresh air = qm,22 – qm,RCA
q = q = q
m,removed, air m,11 m,ETA
q = q – q = q – q
m,OEA m,EHA m,removed air m,21 m,11
Figure 5 — Reference fresh/removed air volume flow with two recirculations
7.3 Ventilation heat recovery performance
7.3.1 General
The tests shall be performed when the multifunctional unit is able to provide simultaneously ventilation
and heat recovery by air to air heat exchanger.
7.3.2 Air flow test conditions
The extract air volume flow rate and the supply air volume flow rate are set as the reference air volume
flow as determined in 6.3. Any additional fans are off and any bypass damper is closed (q = 0 and
V,OEA
q = 0).
V,RCA
Thermal tests shall be performed at the temperature conditions accordingly to the type and use of the
heat recovery device (see Table 3):
— Point 1 is a dry air test, mandatory for all units;
— Point 2 is an intermediate point, mandatory for units category II and optional for category I for
condensation;
— Point 3 is an optional point intended to show extreme condensation conditions;
— Point 4 is a mandatory point for cold climate if the unit is designed to operate at outdoor
temperature below –15 °C;
— Point 5 is a mandatory point if the multifunctional unit shall operate in cooling mode and the heat
exchanger is not bypass;
— Point 6 and 7 are optional points according to the declaration of the manufacturer.
If condensation occurs, then the condensation test shall also be performed.
Table 3 — Temperature conditions
Test point n° Exhaust air and recirculation air Outside air
Dry bulb temp. Wet bulb temp. Dry bulb temp. Wet bulb temp.
θ θ θ θ
11 w11 21 w21
°C °C °C °C
1 – mandatory 20 12 7 6
2 – optional
(mandatory for 20 15 2 1
category II)
3 – optional 20 12 −7 −8
4 – optional
(mandatory for cold 20 12 −15 –
a
climate units)
5 – cooling mode if
27 19 35 24
applicable
6 – optional for cooling
27 19 27 19
mode
7 – optional for cooling
29 19 46 24
mode
a
If the unit is designed to operate at outdoor temperature below −15 °C then the cold climate test shall be
performed.
Following a test for cold climates, the unit shall be visually inspected. This inspection shall be carried
out immediately after defrosting or other similar action. Observations shall be noted in the test report
as to the influence of freezing and condensation on the operation of the heat recovery device, and the
condensation water draining.
7.3.3 Test procedure
Test procedure shall be performed according to EN 13141-7.
The heat pump is switched off and only the ventilation system is operating, i.e. fans and heat recovery
heat exchanger.
Test is performed with the air flow settings defined in 7.2 and the temperatures defined in Table 3.
Once steady-state conditions are obtained, data are recorded during 15 min.
The measurements to be recorded are specified in Table 4 of 7.3.4.
7.3.4 Data to be recorded
The data to be recorded for the thermal capacity tests are given in Table 4. The table identifies the
general information required but is not intended to limit the data to be obtained.
Table 4 — Data to be recorded
Measured or calculated quantity Symbol Unit
Extract air (ETA)
Dry bulb temperature T °C
d,11
Wet bulb temperature T °C
w,11
volume flow rate (at standard air conditions) q m /h
v,11
mass flow rate q kg/s
m,11
Supply air (SUP)
Dry bulb temperature T °C
d,22
Wet bulb temperature Tw,22 °C
volume flow rate (at standard air conditions) q m /h
v,22
mass flow rate q kg/s
m,22
Outdoor air (ODA)
Dry bulb temperature T °C
d,21
Wet bulb temperature T °C
w,21
volume flow rate (at standard air conditions) q m /h
v,21
mass flow rate q kg/s
m,21
Exhaust air (EHA)
Dry bulb temperature T °C
d,12
Wet bulb temperature T °C
w,12
volume flow rate (at standard air conditions) q m /h
v,12
mass flow rate q kg/s
m,12
Electrical quantities
Frequency – Hz
Voltage – V
Total current – A
Others
Atmospheric pressure – Pa
Fan(s) speed setting, if applicable – –
Ventilation measurements
Power input P kW
el,V
Heat recovery capacity PHR kW
Temperature ratio (supply air) η –
θ,su
Temperature ratio (exhaust air) η –
θ,ex
Humidity ratio (supply air) η –
x,su
7.3.5 Calculations
Temperature and humidity ratios shall be calculated according to EN 13141-7.
In addition the energy recovery Q shall be calculated as follows:
HR
Q= q ×−(hh ) (1)
HR m,22 22 21
in kW, with h expressed in kJ/kg.
In case of bypass of the heat exchanger then Q = 0.
HR
7.4 Ventilation and domestic hot water production
7.4.1 General
The tests shall be performed when the multifunctional ventilation unit is able to provide simultaneously
ventilation and domestic hot water production.
The test shall be performed according to EN 16147 for the hot water production with the additional
specifications as described in 7.3.2.
The manufacturer shall declare the tapping cycle to be used according to EN 16147.
During the whole test, the ventilation function is running at reference air volume flow according to 7.2
...