Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy consumption

This document is applicable to gas-fired appliances producing domestic hot water.
It applies to both instantaneous and storage tank appliances; waters-heaters and combination boilers that have:
— a heat input not exceeding 400 kW; and
— a hot water storage tank capacity (if any) not exceeding 2000 l.
In the case of combination boilers, with or without storage tank, domestic hot water production is integrated or coupled, the whole being marketed as a single unit.
The water heaters covered by the present standard are considered "conventional water heaters" as defined by the Transitional Methods (Commission Communication 2014/C 207/03) then in the calculation formula for the Annual Electricity Consumption (AEC), Qcor is equal to zero.
EN 13203-1 sets out in qualitative and quantitative terms the performance in delivery of domestic hot water for a selected variety of uses. It also gives a system for presenting the information to the user. The present document sets out a method for assessing the energy performance of the appliances. It defines a number of daily load profiles for each domestic hot water use, kitchen, shower, bath and a combination of these, together with corresponding test procedures, enabling the energy performances of different gas-fired appliances to be compared and matched to the needs of the user. Where other technologies are combined with a gas-fired boiler or a water heater to produce domestic hot water, specific parts of EN 13203 apply.

Gasgeräte für die häusliche Warmwasserbereitung - Teil 2: Bewertung des Energieverbrauchs

Dieses Dokument ist auf gasbefeuerte Geräte für die sanitäre Warmwasserbereitung anwendbar. Es gilt für sowohl Durchlauferhitzer als auch Warmwasserspeicher, Warmwasserbereiter sowie Kombikessel, die:
—   eine Wärmebelastung von höchstens 400 kW und
—   ein Warmwasser-Speichervolumen (sofern vorhanden) von höchstens 2 000 l haben.
Bei Kombikesseln mit oder ohne Speicher ist die sanitäre Warmwasserbereitung im Kessel eingebaut oder am Kessel angebaut, und das gesamte System wird als eine Einheit vertrieben.
Die von dieser Norm abgedeckten Warmwasserbereiter werden als „konventionelle Warmwasserbereiter“ angesehen, wie durch die „vorläufigen Methoden“ (Mitteilung der Kommission 2014/C 207/03) definiert; daher wird Qcor in der Formel zur Berechnung des jährlichen Stromverbrauchs (en: Annual Electricity Consumption, AEC), gleich null gesetzt.
Falls der Kessel mit einer internen oder externen passiven Abgas-Wärmerückgewinnungsanlage (en: passive flue heat recovery device, PFHRD) ausgerüstet ist, kann der Kesselwirkungsgrad mittels Anwendung von EN 13203 2:2022 in Verbindung mit EN 13203 7:2022 beurteilt werden. Im Falle einer PFHRD, die aufgrund der darin verbauten Technik in der Lage ist, während der Wärmeerzeugung für die Zentralheizung Energie aus den Abgasen zurückzugewinnen, um das sanitäre Warmwasser vorzuwärmen (indirekter Beitrag), gilt für die Beurteilung dieses indirekten Beitrags EN 13203 7:2022. EN 13203 2:2022 gilt für die Messung und Berechnung des direkten Wirkungsgrades (direkter Beitrag), während sich durch Kombination der nach EN 13203 7:2022 erhaltenen Messergebnisse der Gesamtwirkungsgrad (direkt und indirekt) berechnen lässt. EN 13203 1:2015 legt die Leistung bezüglich der Abgabe von sanitärem Warmwasser für eine Auswahl von Benutzungsarten qualitativ und quantitativ fest. Sie enthält zudem ein System zur Bereitstellung von Informationen für den Nutzer. Das vorliegende Dokument legt ein Verfahren zur Bewertung des Energieverhaltens der Geräte fest. Es legt einige tägliche Lastprofile für jede sanitäre Warmwasserverwendung in der Küche, zum Duschen und Baden sowie für Kombinationen dieser Verwendungsarten und die entsprechenden Prüfverfahren fest, mit denen sich das Energieverhalten unterschiedlicher gasbefeuerter Geräte vergleichen und auf die Bedürfnisse des Nutzers ausrichten lässt. Werden andere Technologien mit einem gasbefeuerten Kessel oder einem Warmwasserbereiter für die sanitäre Warmwasserbereitung kombiniert, so gelten die jeweils zutreffenden Teile von EN 13203.

Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles gazeux - Partie 2 : Évaluation de la consommation énergétique

Le présent document s’applique aux appareils de production d’eau chaude sanitaire utilisant des combustibles gazeux. Il s’applique à la fois aux appareils de type instantané et avec ballon, chauffe-eau ou chaudières mixtes, qui ont :
-   un débit calorifique inférieur ou égal à 400 kW ; et
-   une capacité du ballon d’eau chaude (le cas échéant) inférieure ou égale à 2 000 l.
Dans le cas des chaudières mixtes, avec ou sans ballon, la production d’eau chaude sanitaire est intégrée ou accolée, l’ensemble étant commercialisé comme une seule unité.
Les chauffe-eau couverts par la présente norme sont considérés comme des « chauffe-eau conventionnels » tels que définis par les méthodes transitoires de la Communication 2014/C 207/03 de la Commission ; pour ces chauffe-eau, dans la formule de calcul de la consommation annuelle d’électricité (AEC), le terme de correction Qcor est égal à zéro.
Les chaudières équipées d’un dispositif passif de récupération de la chaleur dans les produits de combustion (PFHRD), interne ou externe, peuvent être évaluées en appliquant l’EN 13203-2:2022 en combinaison avec l’EN 13203-7:2022. Dans le cas d’un PFHRD, où la technologie a la capacité de récupérer l’énergie des gaz de combustion lors de la production de chauffage central pour pouvoir préchauffer l’eau chaude sanitaire (contribution indirecte), pour évaluer cette contribution indirecte l’EN 13203-7:2022 s’applique. L’EN 13203-2:2022 est applicable pour mesurer et calculer l’efficacité directe (contribution directe) tandis que la combinaison des résultats de mesurage de l’EN 13203-7:2022 permet de calculer l’efficacité globale (directe et indirecte). L’EN 13203-1:2015 définit, en termes qualitatifs et quantitatifs, la performance en puisage d’eau chaude sanitaire pour une variété sélectionnée d’usages. Elle fournit également un système pour présenter les informations à l’utilisateur. Le présent document définit une méthode pour évaluer les performances énergétiques des appareils. Il spécifie quelques profils de soutirage journaliers pour chaque utilisation d’eau chaude sanitaire, pour la cuisine, la douche, le bain et une combinaison de ces utilisations, ainsi que les modes opératoires d’essai correspondants, ce qui permet de comparer les performances énergétiques des différents appareils utilisant les combustibles gazeux et de les adapter aux besoins de l’utilisateur. Des parties spécifiques de l’EN 13203 s’appliquent lorsque d’autres technologies sont associées à une chaudière ou un chauffe-eau utilisant les combustibles gazeux pour produire de l’eau chaude sanitaire.

Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del: Ocenjevanje rabe energije

General Information

Status
Published
Public Enquiry End Date
01-Mar-2021
Publication Date
14-Nov-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Oct-2022
Due Date
31-Dec-2022
Completion Date
15-Nov-2022

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 13203-2:2022
01-december-2022
Nadomešča:
SIST EN 13203-2:2019
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del:
Ocenjevanje rabe energije
Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption
Gasgeräte für die häusliche Warmwasserbereitung - Teil 2: Bewertung des
Energieverbrauchs

Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles

gazeux - Partie 2 : Évaluation de la consommation énergétique
Ta slovenski standard je istoveten z: EN 13203-2:2022
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 13203-2:2022 en,fr,de

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

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SIST EN 13203-2:2022
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SIST EN 13203-2:2022
EN 13203-2
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2022
EUROPÄISCHE NORM
ICS 91.140.65 Supersedes EN 13203-2:2018
English Version
Gas-fired domestic appliances producing hot water - Part
2: Assessment of energy consumption

Appareils domestiques produisant de l'eau chaude Gasgeräte für die häusliche Warmwasserbereitung -

sanitaire utilisant les combustibles gazeux - Partie 2 : Teil 2: Bewertung des Energieverbrauchs

Évaluation de la consommation énergétique
This European Standard was approved by CEN on 13 June 2022.

This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 7 September 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

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

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13203-2:2022 E

worldwide for CEN national Members.
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
Contents Page

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

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

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

4 General test conditions ................................................................................................................................. 8

4.1 Reference conditions ..................................................................................................................................... 8

4.2 Measurement uncertainties ........................................................................................................................ 9

4.2.1 General................................................................................................................................................................ 9

4.2.2 Steady-state conditions ................................................................................................................................ 9

4.3 Test conditions ................................................................................................................................................ 9

4.3.1 General................................................................................................................................................................ 9

4.3.2 Test room ......................................................................................................................................................... 10

4.3.3 Water supply .................................................................................................................................................. 10

4.3.4 Initial adjustment of the appliance ........................................................................................................ 10

4.3.5 Conditions for the determination of the maximum load profile ................................................. 11

4.3.6 Electrical supply ............................................................................................................................................ 11

5 Determination of the energy consumption of the appliance ........................................................ 11

5.1 General.............................................................................................................................................................. 11

5.2 Load profiles ................................................................................................................................................... 11

5.3 Determination of the energy recovered by the useful water ........................................................ 20

5.4 Calculation of gas energy ........................................................................................................................... 20

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 20

5.4.2 Calculation of daily gas energy consumption in winter mode ...................................................... 21

5.4.3 Daily gas energy consumption seasonally weighted ........................................................................ 22

5.5 Calculation of daily electrical energy consumption ......................................................................... 22

5.6 Measurement of energy consumption in standby mode ................................................................ 23

5.6.1 General.............................................................................................................................................................. 23

5.6.2 Calculation of daily gas energy consumption in standby mode ................................................... 23

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode .................... 24

5.7 Determination of daily auxiliary electrical energy consumption in off mode........................ 24

6 Determination of the ratio of wasted water to total water ............................................................ 24

7 Eco design related products data ............................................................................................................ 25

7.1 Water heating energy efficiency .............................................................................................................. 25

7.2 Smart control factor (SCF) and smart .................................................................................................... 26

7.3 Annual fuel consumption (AFC) ............................................................................................................... 27

7.4 Annual electricity consumption (AEC) .................................................................................................. 27

Annex A (informative) Test conditions ............................................................................................................... 29

Annex B (informative) Examples of test rig and measurement devices ................................................. 32

B.1 General.............................................................................................................................................................. 32

B.2 Pressure measurement............................................................................................................................... 33

B.3 Temperature measurement ...................................................................................................................... 33

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SIST EN 13203-2:2022
EN 13203-2:2022 (E)

Annex C (informative) Declaration of the maximum load profile .............................................................. 37

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 814/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 38

Annex ZB (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 812/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 40

Annex ZC (informative) Relationship between this European Standard and the Ecodesign

requirements of Commission Regulation (EU) n° 813/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 41

Annex ZD (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 811/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 42

Bibliography ................................................................................................................................................................. 43

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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
European foreword

This document (EN 13203-2:2022) has been prepared by Technical Committee CEN/TC 109 “Central

heating boilers using gaseous fuels”, the secretariat of which is held by NEN.

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 February 2023, and conflicting national standards shall

be withdrawn at the latest by February 2023.

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

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

This document supersedes EN 13203-2:2018.
The main technical changes compared to EN 13203-2:2018 are the following:
— improvement of editorial errors;
— incorporation of ECOTESTS results;

— alignment of the text with the relevant Eco-design and Energy Labelling provisions in force.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, ZB, ZC or ZD, which is

an integral part of this document.

The main purpose of this revision is to provide a means of conforming to requirements of Commission

Delegated Regulation (EC) n° 813/2013, (EC) n° 811/2013, (EC) n° 812/2013 and (EC) n° 814/2013.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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

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

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

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

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

Kingdom.
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
Introduction

The safety operation of the boiler or water heater is not covered by this document. Safety is proved by

means of the essential safety requirements of the Gas Appliances Regulation 2016/426/UE. This may be

achieved by compliance with the appropriate existing harmonized standards.

NOTE Useful standards are EN 26, EN 89, EN 15502-1, EN 15502-2-1 and EN 15502-2-2.

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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
1 Scope

This document is applicable to gas-fired appliances producing domestic hot water. It applies to both

instantaneous and storage tank appliances; waters-heaters and combination boilers that have:

— a heat input not exceeding 400 kW;
— a hot water storage tank capacity (if any) not exceeding 2 000 l.

In the case of combination boilers, with or without storage tank, domestic hot water production is

integrated or coupled, the whole being marketed as a single unit.

The water heaters covered by the present standard are considered “conventional water heaters” as

defined by the Transitional Methods (Commission Communication 2014/C 207/03) then in the

calculation formula for the Annual Electricity Consumption (AEC), Q is equal to zero.

cor

In case of the boiler is equipped with an internal or external Passive Flue Heat Recovery Device (PFHRD),

the boiler efficiency can be assessed by applying EN 13203-2:2022 in combination with

EN 13203-7:2022. In case of a PFHRD, where the technology has the ability to recover energy out of flue

gasses during central heating production to be able to preheat the domestic hot water (indirect

contribution), to assess this indirect contribution EN 13203-7:2022 applies. EN 13203-2:2022 is

applicable for measuring and calculating the direct efficiency (direct contribution) while combining the

measuring results of EN 13203-7:2022 the overall efficiency (direct and indirect) can be calculated.

EN 13203-1:2015 sets out in qualitative and quantitative terms the performance in delivery of domestic

hot water for a selected variety of uses. It also gives a system for presenting the information to the user.

The present document sets out a method for assessing the energy performance of the appliances. It

specifies a few daily load profiles for each domestic hot water use, kitchen, shower, bath and a

combination of these, together with corresponding test procedures, enabling the energy performances of

different gas-fired appliances to be compared and matched to the needs of the user. Where other

technologies are combined with a gas-fired boiler or a water heater to produce domestic hot water,

specific parts of EN 13203 apply.
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 13203-7:2022, Gas-fired domestic appliances producing hot water — Part 7: Assessment of energy

consumption of combination boilers equipped with a passive flue heat recovery device

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
storage tank
reservoir for domestic hot water
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
3.2
nominal domestic hot water heat input (Q )
value of the heat input to produce domestic hot water stated in the instructions
— Symbol: Q
— Unit: kilowatt (kW)
3.3
summer mode

conditions during which the appliance supplies energy only for the production of domestic hot water

3.4
winter mode

conditions during which the combination boiler supplies energy for the production of domestic hot water

and space heating
3.5
domestic water test temperature (T )
cold
temperature of the delivered water at which the tests are conducted
3.6
control cycle

time cycle for keeping components and/or the storage tank (if any) of the domestic hot water circuit at

predetermined temperature level, consists of an «ON» duration time during which the heating of the

domestic hot water (by gas energy and/or auxiliary energy) is operating, and an «OFF» duration time

during which no heating occurs
3.7
useful water

quantity of water delivered at the tap for which the temperature increase is in accordance with the

requirement fixed for each individual delivery of the load profiles
3.8
wasted water

quantity of water delivered at the tap for which the temperature increase is not in accordance with the

requirement fixed for each individual delivery of the load profiles
3.9
standby mode

operating state in which the appliance can provide domestic hot water at any time

Note 1 to entry: During standby mode appliance may operate to maintain water temperature but no draw-off is

made.
3.10
off mode

state of an appliance, selected by the user, in which domestic hot water cannot be provided

3.11
useful water flow rate (D )
useful

quantity of water delivered by unit time at the tap for which the temperature increase is in accordance

with the requirement fixed for each individual draw-off of the load profiles
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
3.12
useful water temperature
water temperature, expressed in degrees Celsius, delivered at the tap
3.13
appliance flow rate

quantity of water delivered by the appliance by unit time before the mixing device, if applicable

3.14
appliance water temperature (T )

water temperature, expressed in degrees Celsius, delivered by the appliance before the mixing device

3.15
appliance water temperature rise (ΔT ) in K
measured useful temperature rise at the appliance outlet
3.16
water temperature rise (ΔT ) in K

difference between the useful water temperature and the cold water temperature, at which hot water is

contributing to the reference energy as specified in the load profiles
3.17
water temperature rise for basin draw-off types (ΔT ) in K

difference between the useful water temperature and the cold water temperature, to be achieved during

the water draw-offs, with a minimum value as specified in the load profiles

Note 1 to entry: The minimum temperature difference for basin draw-offs as specified in the load profiles shall

be achieved at least once during the water draw-offs.
3.18
rapid response temperature sensor

measuring instrument with a response time such that 90 % of the final temperature rise, from 15 °C to

100 °C, is obtained within 1 s, when the sensor is plunged into still water

Note 1 to entry: This time is chosen for dynamic measurement and not for steady-state purpose.

4 General test conditions
4.1 Reference conditions
Unless otherwise stated, the general test conditions shall be as follows:
— cold water temperature: 10 °C
— range over the whole duration of the test: (8 °C to 12 °C),
— cold water pressure: 2 bar
— ambient air temperature: 20 °C
— range over the whole duration of the test: (18 °C to 22 °C),
— electrical supply voltage: (230 ± 2) V (single phase).
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)
4.2 Measurement uncertainties
4.2.1 General

Except where otherwise stated in the clauses describing the tests, the uncertainties of measurements

carried out shall not be greater than the maximum uncertainties indicated below.

The standard deviations shall be evaluated taking into account the various sources of uncertainty:

contribution from the instrument, repeatability, calibration, ambient conditions, etc.

— water flow rate: ± 1 %;
— gas flow rate: ± 1 %;
— time: ± 0,2 s;
— temperatures:
— ambient: ± 1 K,
— water: ± 0,5 K,
— gas: ± 0,5 K;
— gas pressure: ± 1 %;
— gas calorific value: ± 1 %;
— gas density: ± 0,5 %;
— electrical energy: ± 2 %.

The stated measurement uncertainties relate to individual measurements. For measurements that

combine several individual measurements, smaller uncertainties on the individual measurements may

be necessary to ensure a total uncertainty within ± 2 % under the steady-state conditions as specified by

4.2.2.
These uncertainties correspond to two standard deviations (2σ).
4.2.2 Steady-state conditions

Steady-state operating conditions are regarded as established when the appliance operates for sufficient

time to reach thermal stabilization.

To reach the steady-state the water temperature at the outlet of the appliance shall not vary by more

than ± 0,5 K.

NOTE This condition can be reached with a gas which is different from the reference gas, provided that the

appliance is supplied with the reference gas for at least 5 min before the requirements are verified.

4.3 Test conditions
4.3.1 General

Except where otherwise stated, the appliance is tested under the following conditions.

For combination gas boiler, the tests shall be carried out only in summer mode as defined in 3.3, and the

appliance shall be set in summer mode.
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)

For all tests specified by this standard, the same adjustment of the appliance shall be maintained.

The load profile used for the measurement shall be the one declared according to the technical instruction

of the appliance (see also Annex C (informative)).

The tests shall be performed in the setting in which the appliance is delivered (out of the box-mode), and

which is documented as such in the technical instructions.

If there are temporary user's settings (automatically self-resetting within 24 h), these shall not be active.

Annex A (informative) gives examples of test cycles for different test conditions.

4.3.2 Test room

The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).

The appliance shall be protected from direct solar radiation and radiation from heat generators.

Annex B (informative) gives examples of test rig and measurement devices.
4.3.3 Water supply
For the tests:

— the domestic water pressure is the inlet water pressure measured as close as possible to the

appliance (see example at Figure B.2);

— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow

and as close as possible to the appliance (see examples at Figure B.3 and Figure B.4) and always

upstream of the electro-valve (tap).

The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except

where otherwise stated, the outlet temperatures shall be measured immediately downstream of the

outlet connection or, in the case of an appliance with spout delivery, by means of an immersed

temperature measuring device, e.g. a u-tube fitted at the outlet of a tube of the same length as the

minimum length of the spout normally supplied together with the appliance.
Water temperatures shall be measured with a rapid response temperature sensor.
4.3.4 Initial adjustment of the appliance

The appliance shall be installed in accordance with the installation instructions.

The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.

The initial adjustment of the appliance water temperature (T ) shall be as follows (see Figure A.1 and

Figure A.2):

a) Appliances with an adjustable temperature: the tests shall be carried out at a temperature not greater

than 65 °C, with a temperature increase equal or greater than 45 K above the water inlet

temperature. For the load profile XS the minimum temperature setting shall be equal to or greater

than 35 °C (ΔT 25 K above water inlet temperature).

b) Appliances with a fixed temperature: the tests shall be carried out at the temperature specified in the

appliance documentation, with a temperature increase equal or greater than 45 K above the water

inlet temperature. For the load profile XS the minimum temperature setting shall be equal to or

greater than 35 °C (ΔT 25 K above water inlet temperature).
NOTE The test conditions of 4.3.1 are applicable.
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SIST EN 13203-2:2022
EN 13203-2:2022 (E)

The same conditions of initial adjustment stated in the appliance documentation shall be used for all the

tests.
These conditions shall be included in the test report.
4.3.5 Conditions for the determination of the maximum load profile

The measurement of the domestic hot water efficiency shall be performed with the maximum load profile

or the one just below this load profile:

a) instantaneous appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that it is possible to adjust the outlet temperature, this temperature shall be set

to the maximum possible value not exceeding 65 °C;

b) storage appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that different modes are possible to be selected, the one that is able to store more

energy and that delivers more hot water during a 24 h period shall be used.
NOTE See Annex C (informative).

In case of declared maximal load profile 3XL or 4XL the load profile for testing should be XXL.

The load profile as used for the domestic hot water performance test shall be stated in the user

instructions.
4.3.6 Electrical supply

The appliance shall be supplied with the nominal voltage stated in the installation instructions.

5 Determination of the energy consumption of the appliance
5.1 General

This clause specifies the test methods to be employed in determining the energy consumption of

appliances.
5.2 Load profiles

All patterns specify a 24 h measurement cycle and within that cycle the starting times and the total energy

content (in kWh equivalent of hot water tapped) of each draw-off are specified.

Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off, versus

“continuous flow” draw-off.

The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can

be considered useful from the very beginning of the draw-off (minimum useful temperature rise is 0 K).

The temperature rise (ΔT ) to be achieved during tapping, shall be 30 K for floor cleaning and bath and

45 K for the dish washes.

The aim of the “continuous flow” type is to use only the water equal and above a fixed useful temperature

rise (ΔT ). For the shower, household cleaning and large draw-offs a temperature rise of 30 K shall be

reached before counting the useful energy. For the small draw-offs a temperature rise (ΔT ) of 15 K shall

be reached.

NOTE 1 The temperature rises (in K) based on 10 °C inlet water temperature stated above are equivalent to the

temperatures (in °C) given by the load profiles tables in Regulations n° 811/2013, n° 812/2013, n° 813/2013 and

n° 814/2013. The tapping flow rates used to perform the different draw-offs of each of the eight load profiles are

specified by Tables 1 to 8.
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EN 13203-2:2022 (E)

In the load profiles, the requirements for water flow rate and temperatures are based on the delivery at

the tap in a mix of hot and cold water. Under the conditions of the initial adjustment, the appliance itself

produces hot water with a minimum temperature rise of 45 K. For the load profile XS the minimum

temperature setting shall be equal to or greater than 35°C (ΔT 25 K above water inlet temperature).

To fulfil the requirements stated in Tables 1 to 8 mixing hot water from the appliance with cold water of

10 °C at the tap is allowed either by using a mixing device (see examples at Figures B.1 and B.5) or by

recalculating the appliance flow rate (D ) according to the following formula:
min
useful
D = D (1)
min useful
where
D is the minimum test rig setting for the appliance flow rate of each individual
min
draw-off at temperature rise corresponding to ΔT , i
...

SLOVENSKI STANDARD
oSIST prEN 13203-2:2021
01-februar-2021
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 2. del:
Ocenjevanje rabe energije
Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption
Gasbeheizte Geräte für die Warmwasserbereitung für den Hausgebrauch - Teil 2:
Bewertung des Energieverbrauchs

Appareils domestiques produisant de leau chaude sanitaire utilisant les combustibles

gazeux - Partie 2 : Évaluation de la consommation énergétique
Ta slovenski standard je istoveten z: prEN 13203-2
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN 13203-2:2021 en,fr,de

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

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oSIST prEN 13203-2:2021
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oSIST prEN 13203-2:2021
DRAFT
EUROPEAN STANDARD
prEN 13203-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2021
ICS 91.140.65 Will supersede EN 13203-2:2018
English Version
Gas-fired domestic appliances producing hot water - Part
2: Assessment of energy consumption

Appareils domestiques produisant de l¿eau chaude Gasbeheizte Geräte für die Warmwasserbereitung für

sanitaire utilisant les combustibles gazeux - Partie 2 : den Hausgebrauch - Teil 2: Bewertung des

Évaluation de la consommation énergétique Energieverbrauchs

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

CEN/TC 109.

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, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

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

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13203-2:2021 E

worldwide for CEN national Members.
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prEN 13203-2:2021 (E)
Contents Page

European Foreword ...................................................................................................................................................... 4

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

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

4 General test conditions ................................................................................................................................. 8

4.1 Reference conditions ..................................................................................................................................... 8

4.2 Measurement uncertainties ........................................................................................................................ 8

4.2.1 General ................................................................................................................................................................ 8

4.2.2 Steady-state conditions ................................................................................................................................. 9

4.3 Test conditions ................................................................................................................................................. 9

4.3.1 General ................................................................................................................................................................ 9

4.3.2 Test room ........................................................................................................................................................ 10

4.3.3 Water supply .................................................................................................................................................. 10

4.3.4 Initial adjustment of the appliance ........................................................................................................ 10

4.3.5 Conditions for the determination of the maximum load profile ................................................. 10

4.3.6 Electrical supply ........................................................................................................................................... 11

5 Determination of the energy consumption of the appliance ........................................................ 11

5.1 General ............................................................................................................................................................. 11

5.2 Load profiles .................................................................................................................................................. 11

5.3 Determination of the energy recovered by the useful water ....................................................... 19

5.4 Calculation of gas energy ........................................................................................................................... 20

5.4.1 Calculation of daily gas energy consumption in summer mode .................................................. 20

5.4.2 Calculation of daily gas energy consumption in winter mode ..................................................... 20

5.4.3 Daily gas energy consumption seasonally weighted ....................................................................... 21

5.5 Calculation of daily electrical energy consumption ........................................................................ 22

5.6 Measurement of energy consumption in standby mode ................................................................ 22

5.6.1 General ............................................................................................................................................................. 22

5.6.2 Calculation of daily gas energy consumption in standby mode .................................................. 22

5.6.3 Calculation of daily auxiliary electrical energy consumption in standby mode ................... 23

5.7 Determination of daily auxiliary electrical energy consumption in off mode ....................... 23

6 Determination of the ratio of wasted water to total water ........................................................... 24

7 Eco design Related Products Data .......................................................................................................... 25

7.1 Water heating energy efficiency ............................................................................................................. 25

7.2 Smart control factor (SCF) and smart ................................................................................................... 26

7.3 Annual fuel consumption (AFC) .............................................................................................................. 26

7.4 Annual electricity consumption (AEC) ................................................................................................. 26

7.5 Mixed water at 40°C (V40) for storage water heaters .................................................................... 27

Annex A (informative) Test conditions ............................................................................................................ 30

Annex B (informative) Examples of test rig and measurement devices ............................................... 33

B.1 General ............................................................................................................................................................. 33

B.2 Pressure measurement .............................................................................................................................. 34

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B.3 Temperature measurement ...................................................................................................................... 34

Annex C (informative) Declaration of the Maximum Load Profile ........................................................... 38

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 814/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 39

Annex ZB (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 812/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 40

Annex ZC (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) n° 813/2013 [OJEU L239 of 6 September

2013] aimed to be covered ........................................................................................................................ 41

Annex ZD (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 811/2013 [OJEU L239 of 6

September 2013] aimed to be covered ................................................................................................. 42

Bibliography ................................................................................................................................................................. 43

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oSIST prEN 13203-2:2021
prEN 13203-2:2021 (E)
European Foreword

This document (prEN 13203-2:2020) has been prepared by Technical Committee CEN/TC 109 “”, the

secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, ZB, ZC and ZD, which are an integral part of

this document.
This document will supersede EN 13203-2:2018.
The main technical changes compared to EN 13203-2:2018 are the following:
— improvement of editorial errors,
— incorporation of ECOTESTS results,

— alignment of the text with the relevant Eco-design and Energy Labelling provisions in force.

The main purpose of this revision is to provide a means of conforming to requirements of Commission

Delegated Regulation (EC) n° 813/2013, (EC) n° 811/2013, (EC) n° 812/2013 and (EC) n° 814/2013.

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oSIST prEN 13203-2:2021
prEN 13203-2:2021 (E)
Introduction

The safety operation of the boiler or water heater is not covered by this document. Safety should be proved by

means of the essential safety requirements of the Gas Appliances Regulation 2016/426/UE. This may be

achieved by compliance with the appropriate existing harmonized standards.

NOTE Useful standards are EN 26, EN 89, EN 15502-1, EN 15502-2-1 and EN 15502-2-2.

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oSIST prEN 13203-2:2021
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1 Scope

This document is applicable to gas-fired appliances producing domestic hot water. It applies to both

instantaneous and storage tank appliances; waters-heaters and combination boilers that have:

— a heat input not exceeding 400 kW; and
— a hot water storage tank capacity (if any) not exceeding 2000 l.

In the case of combination boilers, with or without storage tank, domestic hot water production is integrated

or coupled, the whole being marketed as a single unit.

The water heaters covered by the present document are considered “conventional water heaters” as defined

by the Transitional Methods (Commission Communication 2014/C 207/03) then in the calculation formula for

the Annual Electricity Consumption (AEC), Q is equal to zero.
cor

EN 13203-1 sets out in qualitative and quantitative terms the performance in delivery of domestic hot water

for a selected variety of uses. It also gives a system for presenting the information to the user. The present

document sets out a method for assessing the energy performance of the appliances. It defines a number of

daily load profiles for each domestic hot water use, kitchen, shower, bath and a combination of these, together

with corresponding test procedures, enabling the energy performances of different gas-fired appliances to be

compared and matched to the needs of the user. Where other technologies are combined with a gas-fired boiler

or a water heater to produce domestic hot water, specific parts of EN 13203 apply.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for 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
storage tank
reservoir for domestic hot water
3.2
nominal domestic hot water heat input (Q )

value of the heat input for the production of domestic hot water stated in the instructions

— Symbol: Q
— Unit: kilowatt (kW)
3.3
summer mode

conditions during which the appliance supplies energy only for the production of domestic hot water

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3.4
winter mode

conditions during which the combination boiler supplies energy for the production of domestic hot water and

space heating
3.5
domestic water test temperature (T )
cold
temperature of the delivered water at which the tests are conducted
3.6
control cycle

the time cycle for keeping components and/or the storage tank (if any) of the domestic hot water circuit at

predetermined temperature level, consists of an «ON» duration time during which the heating of the domestic

hot water (by gas energy and/or auxiliary energy) is operating, and an «OFF» duration time during which no

heating occurs
3.7
useful water

quantity of water delivered at the tap for which the temperature increase is in accordance with the requirement

fixed for each individual delivery of the load profiles
3.8
wasted water

quantity of water delivered at the tap for which the temperature increase is not in accordance with the

requirement fixed for each individual delivery of the load profiles
3.9
stand by mode

operating state in which the appliance can provide domestic hot water at any time

Note 1 to entry: During standby mode appliance may operate to maintain water temperature but no draw-off is made.

3.10
off mode

state of an appliance, selected by the user, in which domestic hot water cannot be provided

3.11
useful water flow rate (D )
useful

quantity of water delivered by unit time at the tap for which the temperature increase is in accordance with the

requirement fixed for each individual draw-off of the load profiles
3.12
useful water temperature
water temperature, expressed in degrees Celsius, delivered at the tap
3.13
appliance flow rate

quantity of water delivered by the appliance by unit time before the mixing device, if applicable

3.14
appliance water temperature (T )

water temperature, expressed in degrees Celsius, delivered by the appliance before the mixing device

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oSIST prEN 13203-2:2021
prEN 13203-2:2021 (E)
3.15
appliance water temperature (∆T ) in K
measured useful temperature rise at the appliance outlet
3.16
water temperature rise (∆T ) in K

difference between the useful water temperature and the cold water temperature, at which hot water is

contributing to the reference energy as specified in the load profiles
3.17
water temperature rise for basin draw-off types (∆T ) in K

difference between the useful water temperature and the cold water temperature, to be achieved during the

water draw-offs, with a minimum value as specified in the load profiles

Note 1 to entry: The minimum temperature difference for basin draw-offs as specified in the load profiles shall be

achieved at least once during the water draw-offs.
3.18
rapid response temperature sensor

measuring instrument with a response time such that 90 % of the final temperature rise, from 15 °C to 100 °C,

is obtained within 1 s, when the sensor is plunged into still water

Note 1 to entry: This time is chosen for dynamic measurement and not for steady-state purpose.

3.19
mixed water at 40 °C (V40)

quantity of water at 40 °C, which has the same heat content (enthalpy) as the hot water which is delivered

above 40 °C at the output of the storage water heater, expressed in litres (see Figure 1).

4 General test conditions
4.1 Reference conditions
Unless otherwise stated, the general test conditions shall be as follows:
— cold water temperature: 10 °C;
— range over the whole duration of the test: (8 °C to 12 °C);
— cold water pressure: 2 bar;
— ambient air temperature: 20 °C;
— range over the whole duration of the test: (18 °C to 22 °C);
— electrical supply voltage: (230 ± 2) V (single phase).
4.2 Measurement uncertainties
4.2.1 General

Except where otherwise stated in the clauses describing the tests, the uncertainties of measurements carried

out shall not be greater than the maximum uncertainties indicated below.

The standard deviations shall be evaluated taking into account the various sources of uncertainty: contribution

from the instrument, repeatability, calibration, ambient conditions, etc.
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prEN 13203-2:2021 (E)
— water flow rate: ± 1 %;
— gas flow rate: ± 1 %;
— time: ± 0,2 s;
— temperatures:
— ambient: ± 1 K;
— water: ± 0,5 K;
— gas: ± 0,5 K;
— gas pressure: ± 1 %;
— gas calorific value: ± 1 %;
— gas density: ± 0,5 %;
— electrical energy: ± 2 %.

The stated measurement uncertainties relate to individual measurements. For measurements that combine a

number of individual measurements, smaller uncertainties on the individual measurements may be necessary

to ensure a total uncertainty within ± 2 % under the steady-state conditions as defined by 4.2.2.

These uncertainties correspond to two standard deviations (2σ).
4.2.2 Steady-state conditions

Steady-state operating conditions are regarded as established when the appliance operates for sufficient time

to reach thermal stabilization.

To reach the steady-state the water temperature at the outlet of the appliance shall not vary by more

than ± 0,5 K.

NOTE This condition can be reached with a gas which is different from the reference gas, provided that the appliance

is supplied with the reference gas for at least 5 min before the requirements are verified.

4.3 Test conditions
4.3.1 General

Except where otherwise stated, the appliance is tested under the following conditions.

For combination gas boiler, the tests shall be carried out only in summer mode as defined in 3.3, and the

appliance shall be set in summer mode.

For all tests defined by this standard, the same adjustment of the appliance shall be maintained.

The load profile used for the measurement shall be the one declared according to the technical instruction of

the appliance (see also Annex C).

The tests shall be performed in the setting in which the appliance is delivered (out of the box-mode), and which

is documented as such in the technical instructions.

If there are temporary user's settings (automatically self-resetting within 24 h), these shall not be active.

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4.3.2 Test room

The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).

The appliance shall be protected from direct solar radiation and radiation from heat generators.

4.3.3 Water supply
For the tests:

— the domestic water pressure is the inlet water pressure measured as close as possible to the appliance (see

example at Figure B.2);

— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow and as

close as possible to the appliance (see examples at Figure B.3 and Figure B.4) and always upstream of the

electro-valve (tap).

The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except where

otherwise stated, the outlet temperatures shall be measured immediately downstream of the outlet connection

or, in the case of an appliance with spout delivery, by means of an immersed temperature measuring device,

e.g. a u-tube fitted at the outlet of a tube of the same length as the minimum length of the spout normally

supplied together with the appliance.
Water temperatures shall be measured with a rapid response temperature sensor.
4.3.4 Initial adjustment of the appliance

The appliance shall be installed in accordance with the installation instructions.

The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.

The initial adjustment of the appliance water temperature (T ) shall be as follows (see Figure A.1 and

Figure A.2):

a) Appliances with an adjustable temperature: the tests shall be carried out at a temperature not greater than

65 °C, with a temperature increase equal or greater than 45 K above the water inlet temperature. For the

load profile XS the minimum temperature setting shall be equal to or greater than 35°C (∆T 25 K above

water inlet temperature).

b) Appliances with a fixed temperature: the tests shall be carried out at the temperature specified in the

appliance documentation, with a temperature increase equal or greater than 45 K above the water inlet

temperature. For the load profile XS the minimum temperature setting shall be equal to or greater than

35°C (∆T 25 K above water inlet temperature)
NOTE The test conditions of 4.3.1 are applicable.

The same conditions of initial adjustment stated in the appliance documentation shall be used for all the tests.

These conditions shall be included in the test report.
4.3.5 Conditions for the determination of the maximum load profile

The measurement of the domestic hot water efficiency shall be performed with the maximum load profile or

the one just below this load profile:

a) Instantaneous appliances shall be set to the nominal heat input as stated on the data plate. If the user

instructions specify that it is possible to adjust the outlet temperature, this temperature shall be set to the

maximum possible value not exceeding 65°C.
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b) Storage appliances shall be set to the nominal heat input as stated on the data plate. If the user instructions

specify that different modes are possible to be selected, the one that is able to store more energy and that

delivers more hot water during a 24 hours period shall be used.
NOTE 1 See Annex C (informative).

NOTE 2 In case of declared maximal load profile 3XL or 4XL the load profile for testing should be XXL.

The load profile as used for the domestic hot water performance test shall be stated in the user instructions.

4.3.6 Electrical supply

The appliance shall be supplied with the nominal voltage stated in the installation instructions.

5 Determination of the energy consumption of the appliance
5.1 General

This clause defines the test methods to be employed in determining the energy consumption of appliances.

5.2 Load profiles

All patterns define a 24 h measurement cycle and within that cycle the starting times and the total energy

content (in kWh equivalent of hot water tapped) of each draw-off are defined.

Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off versus “continuous

flow” draw-off.

The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can be

considered useful from the very beginning of the draw-off (minimum useful temperature rise is 0 K). The

temperature rise (ΔTp) to be achieved during tapping, shall be 30 K for floor cleaning and bath and 45 K for the

dish washes.

The aim of the “continuous flow” type is to use only the water equal and above a fixed useful temperature rise

(ΔT ). For the shower, household cleaning and large draw-offs a temperature rise of 30 K shall be reached

before counting the useful energy. For the small draw-offs a temperature rise (ΔT ) of 15 K shall be reached.

NOTE 1 The temperature rises (in K) based on 10 °C inlet water temperature stated above are equivalent to the

temperatures (in °C) given by the load profiles tables in Regulations n° 811/2013, n° 812/2013, n° 813/2013 and n°

814/2013. The tapping flow rates used to perform the different draw-offs of each of the eight load profiles are defined by

Tables 1 to 8.

In the load profiles, the requirements for water flow rate and temperatures are based on the delivery at the tap

in a mix of hot and cold water. Under the conditions of the initial adjustment, the appliance itself produces hot

water with a minimum temperature rise of 45 K. For the load profile XS the minimum temperature setting shall

be equal to or greater than 35°C (∆T 25 K above water inlet temperature).

To fulfil the requirements stated in Tables 1 to 8 mixing hot water from the appliance with cold water of 10 °C

at the tap is allowed either by using a mixing device (see examples at Figures B.1 and B.5) or by recalculating

the appliance flow rate (D ) according to the following formula:
min
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prEN 13203-2:2021 (E)
useful
D = D (1)
min useful
where

D is the minimum test rig setting for the appliance flow rate of each individual draw-off at

min
temperature rise corresponding to ΔT , in l/min;
D is the useful water flow rate according to Tables 1 to 8, in l/min;
useful
ΔT is the appliance water temperature rise, with a minimum of 30 K;

ΔT is the higher value between the temperature rise to be achieved and the minimum

useful
temperature rise for counting the useful energy according to Tables 1 to 8.

If the appliance cannot deliver these flow rates, for instance due to the flow restrictor, it shall be checked that

the requirements are fulfilled by checking that (D ) is delivered.
min

If by design the appliance is fitted with a flow restrictor, the tests shall be carried out with this flow restrictor.

The tests shall be performed by using the useful water flow rates defined by Tables 1 to 8.

Table 1 — Load profile XS
Start Energy Type of draw-off Useful ΔTp to be Minimum
Draw-off
n° (kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:30 0,525 Medium 3 25
2 12:45 0,525 Medium 3 25
3 20:30 1,050 Large 3 25
Q 2,100
ref
Equivalent hot water litres at 60°C 36
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Table 2 — Load profile S
Draw-off Start Energy Type of draw-off Useful ΔTp to be Minimum
(kWh) water flow achieved ΔTm for
(h:min)
rate at the during counting
tap tapping useful energy
(l/min) (K) (K)
1 07:00 0,105 Small 3 15
2 07:30 0,105 Small 3 15
3 08:30 0,105 Small 3 15
4 09:30 0,105 Small 3 15
5 11:30 0,105 Small 3 15
6 11:45 0,105 Small 3 15
7 12:45 0,315 Dish washing n°1 4 45 0
8 18:00 0,105 Small 3 15
9 18:15 0,105 Household cleaning 3 30
10 20:30 0,420 Dish washing n°2 4 45 0
11 21:30 0,525 Large 5 35
Q 2,100
ref
Equivalent hot water litres at 60°C 36
------------------
...

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