SIST 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

This European Standard is applicable to gas-fired appliances producing domestic hot water. It applies to
condensing combination boilers with passive flue heat recovery device (PFHRD) that have:
— a heat input not exceeding 400 kW,
— a hot water storage tank capacity (if any) not exceeding 2000 l,
— a declared load profile between M to 4XL.
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.
For this standard, some tests and calculation results of FprEN 13203-2:2018 are used to calculate the energy consumptions.

Gasgeräte für die häusliche Warmwasserbereitung - Teil 7: Bewertung des Energieverbrauchs von Kombigeräten, ausgerüstet mit einer passiven Vorrichtung zur Wärmerückgewinnung im Abgasschacht

Dieses Dokument gilt für gasbefeuerte Geräte für die sanitäre Warmwasserbereitung. Es gilt für Kondensations-Kombikessel mit passiver Abgas-Wärmerückgewinnungsanlage (PFHRD, en: passive flue heat recovery device), die:
—   eine Wärmebelastung von höchstens 400 kW;
—   ein Warmwasser-Speichervolumen (sofern vorhanden) von höchstens 2 000 l; und
—   ein angegebenes Lastprofil zwischen M und 4XL 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.
In diesem Dokument werden einige Prüfungen und Rechenergebnisse aus FprEN 13203 2:2022 zur Berechnung der Energieverbräuche verwendet.

Appareils domestiques produisant de l’eau chaude sanitaire utilisant les combustibles gazeux - Partie 7 : Évaluation de la consommation énergétique d’une chaudière à deux services équipée d’un dispositif passif de récupération de la chaleur dans les produits de combustion

Le présent document s’applique aux appareils de production d’eau chaude sanitaire utilisant les combustibles gazeux. Il s’applique aux chaudières à deux services à condensation équipées d’un dispositif passif de récupération de la chaleur dans les produits de combustion (PFHRD) 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 ;
-   un profil de soutirage déclaré compris entre M et 4XL.
Dans le cas des chaudières à deux services, avec ou sans ballon, la production d’eau chaude sanitaire est intégrée ou accolée, l’ensemble étant commercialisé comme une seule unité.
Pour le présent document, certains résultats d’essai et de calcul de l’EN 13203-2:2022 sont utilisés pour calculer les consommations énergétiques.

Plinske gospodinjske naprave za pripravo tople sanitarne vode - 7. del: Ocenjevanje rabe energije kombiniranih naprav s prigrajenimi napravami za vračanje toplote iz dimnih plinov

General Information

• Status: Published
• Public Enquiry End Date: 01-Mar-2021
• Publication Date: 14-Nov-2022
• ICS: 91.140.65 - Water heating equipment
• Technical Committee: PLN - Gas appliances for domestic use
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 26-Oct-2022
• Due Date: 31-Dec-2022
• Completion Date: 15-Nov-2022
• Directive: 811/2013 - Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device
• Directive: 812/2013 - Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Directive: 814/2013 - Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks
• Mandate: M/534 - [C(2015)2625] Standardisation request to the European standardisation organisations pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks and Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device
• Ref Project: 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

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 13203-7:2022
01-december-2022
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 7. del:
Ocenjevanje rabe energije kombiniranih naprav s prigrajenimi napravami za
vračanje toplote iz dimnih plinov
Gas-fired domestic appliances producing hot water - Part 7: Assessment of energy
consumption of combination boilers equipped with a passive flue heat recovery device
Gasgeräte für die häusliche Warmwasserbereitung - Teil 7: Bewertung des
Energieverbrauchs von Kombigeräten, ausgerüstet mit einer passiven Vorrichtung zur
Wärmerückgewinnung im Abgasschacht
Appareils domestiques produisant de l’eau chaude sanitaire utilisant les combustibles
gazeux - Partie 7 : Évaluation de la consommation énergétique d’une chaudière à deux
services équipée d’un dispositif passif de récupération de la chaleur dans les produits de
combustion
Ta slovenski standard je istoveten z: EN 13203-7:2022
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 13203-7:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13203-7:2022

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SIST EN 13203-7:2022


EN 13203-7
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2022
EUROPÄISCHE NORM
ICS 91.140.65
English Version

Gas-fired domestic appliances producing hot water - Part
7: Assessment of energy consumption of combination
boilers equipped with a passive flue heat recovery device
Appareils domestiques produisant de l'eau chaude Gasgeräte für die häusliche Warmwasserbereitung -
sanitaire utilisant les combustibles gazeux - Partie 7 : Teil 7: Bewertung des Energieverbrauchs von
Évaluation de la consommation énergétique d'une Kombigeräten, ausgerüstet mit einer passiven
chaudière à deux services équipée d'un dispositif passif Vorrichtung zur Wärmerückgewinnung im
de récupération de la chaleur dans les produits de Abgasschacht
combustion
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 13203-7:2022 E
worldwide for CEN national Members.

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General test conditions . 7
4.1 Reference condition . 7
4.2 Measurement uncertainties . 7
4.2.1 General. 7
4.2.2 Steady-state conditions . 7
4.3 Test conditions . 7
4.3.1 General. 7
4.3.2 Test room . 7
4.3.3 Water supply . 7
4.3.4 Initial adjustment of the appliance . 9
4.3.5 Conditions for the determination of the maximum load profile . 9
4.3.6 Electrical supply . 9
5 Determination of applicability of the present standard . 9
6 Determination of the energy consumption of the appliances with PFHRD . 11
6.1 General. 11
6.2 Load profiles . 11
6.3 Calculation of gas energy . 11
6.3.1 Determination of the daily gas energy consumption in summer mode (Q ) . 11
gas,s
6.3.2 Determination of the indirect PFHRD contribution (Q ) . 12
gas,i
6.3.3 Daily gas energy consumption . 18
7 Eco design related products data . 19
7.1 Water heating energy efficiency . 19
7.2 Smart control factor (SCF) and smart . 19
7.3 Annual fuel consumption (AFC) . 19
7.4 Annual electricity consumption (AEC) . 20
7.5 Mixed water at 40 °C (V40) for storage water heaters . 20
Annex A (informative) Test conditions . 21
Annex B (informative) Examples of test rig and measurement devices . 22
Annex C (informative) Declaration of the Maximum Load Profile . 23
Annex D (informative) Efficiency Performance Buildings calculations . 24
D.1 General. 24
D.2 Determination of the central heating gas consumption in the test (Q ) . 24
gas,CH,test
D.2.1 Short test method . 24
D.2.2 24 h test method . 25
2

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EN 13203-7:2022 (E)
Bibliography . 26

3

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
European foreword
This document (EN 13203-7:2022) 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.
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.

4

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
Introduction
This document refers to clauses of EN 13203-2:2022 or adapts clauses by stating in the corresponding
clause, on the principle:
— shall be according to EN 13203-2:2022, (clause number) with the following modification;
— shall be according to EN 13203-2:2022, (clause number) with the following addition;
— EN 13203-2:2022, (clause number) is replaced with the following;
— EN 13203-2:2022, (clause number) is not applicable.

5

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
1 Scope
This document is applicable to gas-fired appliances producing domestic hot water. It applies to
condensing combination boilers with passive flue heat recovery device (PFHRD) that have:
— a heat input not exceeding 400 kW;
— a hot water storage tank capacity (if any) not exceeding 2 000 l;
— a declared load profile between M to 4XL.
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.
For this document, some tests and calculation results of EN 13203-2:2022 are used to calculate the
energy consumptions.
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 13203-1:2015, Gas fired domestic appliances producing hot water — Part 1: Assessment of performance
of hot water deliveries
EN 13203-2:2022, Gas-fired domestic appliances producing hot water — Part 2: Assessment of energy
consumption
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13203-2:2022, Clause 3, with and
the following additions 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
direct PFHRD contribution
energy recovered from the flue gases during domestic hot water production and used to preheat the cold
domestic water
3.2
indirect PFHRD contribution
energy recovered from the flue gases during central heating production, then stored and used to preheat
the cold domestic water
3.3
nominal average heat inputs (Q )
a
arithmetic mean of the adjustable maximum and minimum nominal heat input (kW) as declared by the
technical documentation for range rating appliances
6

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EN 13203-7:2022 (E)
3.4
Passive Flue Heat Recovery Device (PFHRD)
device integrated in the appliance or supplied with the appliance to transmit recovered heat to cold
domestic hot water
3.5
thermal bridge
transfer of recovered heat to the PFHRD when the boiler is running in central heating mode by anything
else than heat from the flue gasses
4 General test conditions
4.1 Reference condition
Shall be according to EN 13203-2:2022, 4.1.
4.2 Measurement uncertainties
4.2.1 General
Shall be according to EN 13203-2:2022, 4.2.1.
4.2.2 Steady-state conditions
Shall be according to EN 13203-2:2022, 4.2.2.
4.3 Test conditions
4.3.1 General
Shall be according to EN 13203-2:2022, 4.3.1, with the following modification:
The following sentence is not applicable:
“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.”.
The following sentence is modified as follows:
“The load profile used for the measurement shall be the one declared in the technical instruction of the
appliance”.
4.3.2 Test room
Shall be according to EN 13203-2:2022, 4.3.2.
4.3.3 Water supply
EN 13203-2:2022, 4.3.3 is replaced with the following:
“For the tests:
— The domestic water pressure is the static water inlet pressure measured as close as possible to the
product.
— The inlet temperatures are measured immediately upstream of the cold water inlet connection in the
axis of the flow.
— An additional (rapid response) sensor X shall be placed immediately in the domestic water outlet of
the PFHRD construction. This sensor shall be situated in the axis of the flow. If the PFHRD is an
7

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
integrated part of the boiler, an adapter is needed to install the temperature sensor X. The technical
documentation shall give a figure of this adapter. The appliance under test shall be fitted with an
adapter that is supplied with the appliance accessories.
Water temperatures shall be measured with a rapid response temperature sensor.

Key
a PFHRD X rapid temperature sensor
b boiler A DHW in
c heat exchanger (CH circuit) B CH in
d heat exchanger (DHW circuit) C CH out
e CH pump D DHW out
f flue
g 3 way valve”
Figure 1 — Position of the X sensor for boilers with separated secondary heat exchanger

8

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)

Key
a PFHRD X temperature measurement point
b boiler A DHW in
c heat exchanger (CH circuit) B CH in
e CH pump C CH out
f flue D DHW out
Figure 2 — Position of the X sensor for boilers with integrated secondary heat exchanger”.
4.3.4 Initial adjustment of the appliance
Shall be according to EN 13203-2:2022, 4.3.4 with the following modification:
“Load profile XS is not applicable.”.
4.3.5 Conditions for the determination of the maximum load profile
EN 13203-2:2022, 4.3.5 is not applicable.
4.3.6 Electrical supply
Shall be according to EN 13203-2:2022, 4.3.6.
The following new Clause 5 is added: “
5 Determination of applicability of the present standard
To ensure that the appliance is in the scope of this standard it shall be proved that during central heating
production there is no significant heat transfer to the PFHRD construction.
This heat transfer can be caused by a so called “thermal bridge” where conduction, convection (even by
self-circulation in a single tube with a net water flow of zero) and radiation during the production of
central heating water can occur.
9

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)

Figure 3 — Determination of applicability of the present standard
Test method:
a) The domestic hot water circuit including the PFHRD shall be cooled by a water flow at 10 °C and with
the nominal water flow rate according to EN 13203-1:2015 (5.2) or based on the maximal useful
water flow rate in accordance with the maximum load profile determined by EN 13203-2:2022
(4.3.5), until the appliance water temperature (D in Figures 1 and 2) has reached the thermal
equilibrium. After that, this flow will continue for 10 min.
b) After that the central heating circuit (including the primary heat exchanger) shall be heated up by an
external heat source. The water rate through the boiler is adjusted so as to obtain a return water
temperature of (60 ± 0,5) °C and a temperature difference between flow and return water
temperature of (20 ± 1) °C at an average temperature of 70 °C ± 1 K until thermal equilibrium is
reached. 60 min after this thermal equilibrium, the circulation over the central heating circuit is
stopped.
c) One minute after the circulation stop over the central heating circuit, a domestic water draw off with
cold water of 10 °C and a water flow of 0,5 to 1,0 l/min is started. During this draw off, the water
flow, the cold water inlet temperature T and the water outlet temperature of the PFHRD (T
DHW-in X
of sensor X) shall be measured with a sampling time not exceeding one second. The draw off will be
stopped when T ≤ T + 1 K during 10 (±1) seconds.
x DHW-in
The thermal bridge energy (Q ) in watt-hour (Wh) shall be calculated with the following formula:
tb
t
Q=1000⋅⋅c D ∆T t dt (1)
( )
tb w∫
0
where
10

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SIST EN 13203-7:2022
EN 13203-7:2022 (E)
D is the flow rate delivered, in l/min;
ΔT (t) is the domestic water instantaneous temperature rise over the PFHRD (difference over the
cold water sensor and the sensor X), in K;
t is the tapping duration of the domestic water, in min;
−3
c is equal to 1,163⋅10 is the specific heat capacity of water, in kWh/l⋅K.
w

The maximum permitted values for the Q , in Wh, are given in Table 1.
tb
Table 1 — Maximum permitted thermal bridge energy
Load profile M L XL XXL 3XL 4XL
Permitted thermal bridge
energy Q in Wh at 70 °C
16 31 51 65 124 249
tb
central heating temperature

If the thermal bridge energy Q is above the perm
...

SLOVENSKI STANDARD
oSIST prEN 13203-7:2021
01-februar-2021
Plinske gospodinjske naprave za pripravo tople sanitarne vode - 7. del:
Ocenjevanje rabe energije kombiniranih naprav s prigrajenimi napravami za
vračanje toplote iz dimnih plinov
Gas-fired domestic appliances producing hot water - Part 7: Assessment of energy
consumption of combination boilers equipped with a passive flue heat recovery device
Gasbefeuerte Geräte zur Warmwasserbereitung für den Hausgebrauch - Teil 7:
Bewertung des Energieverbrauchs von Kombigeräten, ausgerüstet mit einer passiven
Vorrichtung zur Wärmerückgewinnung im Abgasschacht
Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles
gazeux Partie 7: Evaluation de la consommation énergétique d'une chaudière équipée
d'un dispositif passif de récupération de la chaleur dans les fumées
Ta slovenski standard je istoveten z: prEN 13203-7
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN 13203-7:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13203-7:2021

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oSIST prEN 13203-7:2021


DRAFT
EUROPEAN STANDARD
prEN 13203-7
NORME EUROPÉENNE

EUROPÄISCHE NORM

February 2021
ICS 91.140.65
English Version

Gas-fired domestic appliances producing hot water - Part
7: Assessment of energy consumption of combination
boilers equipped with a passive flue heat recovery device
Appareils domestiques produisant de l'eau chaude Gasbeheizte Geräte für die sanitäre
sanitaire utilisant les combustibles gazeux - Partie 7 : Warmwasserbereitung für den Hausgebrauch - Teil 7:
Évaluation de la consommation énergétique d'une Bewertung des Energieverbrauchs von Kombigeräten,
chaudière à deux services équipée d'un dispositif passif ausgerüstet mit einer passiven Vorrichtung zur
de récupération de la chaleur dans les produits de Wärmerückgewinnung im Abgasschacht
combustion
This draft European Standard is submitted to CEN members for second 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 13203-7:2021 E
worldwide for CEN national Members.

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oSIST prEN 13203-7:2021
prEN 13203-7:2021 (E)
Contents Page
European Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General test conditions . 6
4.1 Reference condition . 6
4.2 Measurement uncertainties . 6
4.2.1 General . 6
4.2.2 Steady-state conditions . 6
4.3 Test conditions . 6
4.3.1 General . 6
4.3.2 Test room . 6
4.3.3 Water supply . 6
4.3.4 Initial adjustment of the appliance . 8
4.3.5 Conditions for the determination of the maximum load profile . 8
4.3.6 Electrical supply . 8
5 Determination of applicability of the present standard . 9
6 Determination of the energy consumption of the appliances with PFHRD . 10
6.1 General . 10
6.2 Load profiles . 10
6.3 Calculation of gas energy . 10
6.3.1 Determination of the daily gas energy consumption in summer mode (Q ) . 10
gas,s
6.3.2 Determination of the indirect PFHRD contribution (Q ) . 11
gas,i
6.3.3 Daily gas energy consumption . 16
7 Eco design Related Products Data . 17
7.1 Water heating energy efficiency . 17
7.2 Smart control factor (SCF) and smart . 17
7.3 Annual fuel consumption (AFC) . 17
7.4 Annual electricity consumption (AEC) . 17
7.5 Mixed water at 40 °C (V40) for storage water heaters . 17
Annex A (informative) Test conditions . 18
Annex B (informative) Examples of test rig and measurement devices . 19
Annex C (informative) Declaration of the Maximum Load Profile . 20
Bibliography . 21
2

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oSIST prEN 13203-7:2021
prEN 13203-7:2021 (E)
European Foreword
This document (prEN 13203-7:2021) has been prepared by Technical Committee CEN/TC 109 “Central
heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
This document is currently submitted to the 2nd CEN Enquiry.
3

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oSIST prEN 13203-7:2021
prEN 13203-7:2021 (E)
Introduction
This document refers to clauses of prEN 13203-2:2020 or adapts clauses by stating in the corresponding
clause, on the principle:
— shall be according to prEN 13203-2:2020, (clause number) with the following modification;
— shall be according to prEN 13203-2:2020, (clause number) with the following addition;
— prEN 13203-2:2020, (clause number) is replaced by the following;
— prEN 13203-2:2020, (clause number) is not applicable.
4

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oSIST prEN 13203-7:2021
prEN 13203-7:2021 (E)
1 Scope
This document is applicable to gas-fired appliances producing domestic hot water. It applies to condensing
combination boilers with passive flue heat recovery device (PFHRD) that have:
— a heat input not exceeding 400 kW,
— a hot water storage tank capacity (if any) not exceeding 2000 l,
— a declared load profile between M to 4XL.
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.
For this document, some tests and calculation results of EN 13203-2:2020 are used to calculate the energy
consumptions.
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.
prEN 13203-2:2020, Gas-fired domestic appliances producing hot water – Part 2: Assessment of energy
consumption
EN 13203-1:2015, Gas fired domestic appliances producing hot water - Part 1: Assessment of performance of hot
water deliveries
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 13203-2:2020 and the following
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 https://www.iso.org/obp
3.1
direct PFHRD contribution
energy recovered from the flue gases during domestic hot water production and used to preheat the cold
domestic water
3.2
indirect PFHRD contribution
energy recovered from the flue gases during central heating production and used to preheat the cold domestic
water
3.3
nominal average heat input (Q )
a
arithmetic mean of the adjustable maximum and minimum nominal heat input (kW) as declared by the
technical documentation for range rating appliances
5

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3.4
Passive Flue Heat Recovery Device (PFHRD)
device integrated in the appliance or supplied with the appliance to transmit recovered heat
3.5
thermal bridge
transfer of recovered heat to the PFHRD when the boiler is running in central heating mode by anything else
than heat from the flue gasses
4 General test conditions
4.1 Reference condition
Shall be according to prEN 13203-2:2020, 4.1.
4.2 Measurement uncertainties
4.2.1 General
Shall be according to prEN 13203-2:2020, 4.2.1.
4.2.2 Steady-state conditions
Shall be according to prEN 13203-2:2020, 4.2.2.
4.3 Test conditions
4.3.1 General
Shall be according to prEN 13203-2:2020, 4.3.1, with the following modification:
The following sentence is not applicable:
“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.”
The following sentence is modified as follows:
“The load profile used for the measurement shall be the one declared in the technical instruction of the
appliance”.
4.3.2 Test room
Shall be according to prEN 13203-2:2020, 4.3.2.
4.3.3 Water supply
prEN 13203-2:2020, 4.3.3 is replaced by the following:
“For the tests:
— The domestic water pressure is the static water inlet pressure measured as close as possible to the
product.
— The inlet temperatures are measured immediately upstream of the cold water inlet connection in the
centre of the flow.
— An additional (rapid response) sensor X shall be placed immediately in the domestic water outlet of the
PFHRD construction. This sensor shall be situated in the centre of the flow. If the PFHRD is an integrated
part of the boiler, an adapter is needed to install the temperature sensor X. The technical documentation
6

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shall give a figure of this adapter. The appliance under test shall be fitted with an adapter that is supplied
with the appliance accessories. This flow will continue for 10 min after the thermal equilibrium.
Water temperatures shall be measured with a rapid response temperature sensor.

Key
PFHRD X Temperature measurement point
a
b Boiler A DHW in
c Heat exchanger (CH circuit) B CH in
d Heat exchanger (DHW circuit) C CH out
e CH pump D DHW out
f Flue
g 3 way valve”
Figure 1 — Position of the X sensor for boilers with separated secondary heat exchanger
7

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Key
a PFHRD X Temperature measurement point
b Boiler A DHW in
c Heat exchanger (CH circuit) B CH in
d Heat exchanger (DHW circuit) C CH out
e CH pump D DHW out
f Flue
g 3 way valve”
Figure 2 — Position of the X sensor for boilers with integrated secondary heat exchanger
4.3.4 Initial adjustment of the appliance
Shall be according to prEN 13203-2:2020, 4.3.4 with the following modification:
”Load profile XS is not applicable.”
4.3.5 Conditions for the determination of the maximum load profile
PrEN 13203-2:2020, 4.3.5 is not applicable.
4.3.6 Electrical supply
Shall be according to PrEN 13203-2:2020, 4.3.6.
The following new Clause 5 is added:
8

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5 Determination of applicability of the present standard
To ensure that the appliance is in the scope of this standard it shall be proved that during central heating
production there is no significant heat transfer to the PFHRD construction.
This heat transfer can be caused by a so called “thermal bridge” where conduction, convection (even by self-
circulation in a single tube with a net water flow of zero) and radiation during the production of central
heating water can occur.

Figure 3 — Determination of applicability of the present standard
Test method:
a) The domestic hot water circuit including the PFHRD shall be cooled by a water flow at 10 °C and with the
nominal water flow rate according to EN 13203-1:2015 (5.2), until the appliance water temperature (D in
Figures 1 and 2) has reached the thermal equilibrium. After that, this flow will continue for 10 min.
b) After that the central heating circuit (including the primary heat exchanger) shall be heated up by an
external heat source. The water rate through the boiler is adjusted so as to obtain a return water
temperature of (60 ± 0,5) °C and a temperature difference between flow and return water temperature of
(20 ± 1) °C at an average temperature of 70 °C ± 1 K until thermal equilibrium is reached. 60 min after
this thermal equilibrium, the circulation over the central heating circuit is stopped.
c) One minute after the circulation stop over the central heating circuit, a domestic water draw off with cold
water of 10 °C and a water flow of 0,5 to 1,0 l/min is started. During this draw off, the water flow, the cold
water inlet temperature T and the water outlet temperature of the PFHRD (T of sensor X) shall be
DHW-in X
measured with a sample rate not less than once per second. The draw off will be stopped when T ≤ T
x DHW-
+ 1 K during 10 (±1) seconds.
in
9

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...

SLOVENSKI STANDARD
oSIST prEN 13203-7:2019
01-december-2019
[Not translated]
Gas-fired domestic appliances producing hot water - Part 7: Assessment of energy
consumption of combination boilers equipped with a passive flue heat recovery device
Gasbefeuerte Geräte zur Warmwasserbereitung für den Hausgebrauch - Teil 7:
Bewertung des Energieverbrauchs von Kombigeräten, ausgerüstet mit einer passiven
Vorrichtung zur Wärmerückgewinnung im Abgasschacht
Appareils domestiques produisant de l'eau chaude sanitaire utilisant les combustibles
gazeux Partie 7: Evaluation de la consommation énergétique d'une chaudière équipée
d'un dispositif passif de récupération de la chaleur dans les fumées
Ta slovenski standard je istoveten z: prEN 13203-7
ICS:
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN 13203-7:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13203-7:2019


DRAFT
EUROPEAN STANDARD
prEN 13203-7
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2019
ICS
English Version

Gas-fired domestic appliances producing hot water - Part
7: Assessment of energy consumption of combination
boilers equipped with a passive flue heat recovery device
Appareils domestiques produisant de l'eau chaude Gasbeheizte Geräte für die sanitäre
sanitaire utilisant les combustibles gazeux - Partie 7 : Warmwasserbereitung für den Hausgebrauch - Teil 7:
Évaluation de la consommation énergétique d'une Bewertung des Energieverbrauchs von Kombigeräten,
chaudière à deux services équipée d'un dispositif passif ausgerüstet mit einer passiven Vorrichtung zur
de récupération de la chaleur dans les produits de Wärmerückgewinnung im Abgasschacht
combustion
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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13203-7:2019 E
worldwide for CEN national Members.

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prEN 13203-7:2019 (E)
Contents Page
European Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General test conditions . 6
4.1 Reference condition . 6
4.2 Measurement uncertainties . 6
4.2.1 General . 6
4.2.2 Steady state conditions . 6
4.3 Test conditions . 6
4.3.1 General . 6
4.3.2 Test room . 7
4.3.3 Water supply . 7
4.3.4 Initial adjustment of the appliance . 8
4.3.5 Conditions for the determination of the maximum load profile . 8
4.3.6 Electrical supply . 8
5 Determination of applicability of the present standard . 8
6 Determination of the energy consumption of the appliances with PFHRD . 10
6.1 General . 10
6.2 Load profiles . 10
6.3 Calculation of gas energy . 10
6.3.1 Determination of the daily gas energy consumption in summer mode (Q ) . 10
gas,s
6.3.2 Determination of the indirect PFHRD contribution (Q ) . 10
gas,i
6.3.3 Daily gas energy consumption . 16
7 Eco design Related Products Data . 17
7.1 Water heating energy efficiency . 17
7.2 Annual fuel consumption (AFC) . 17
7.3 Annual electricity consumption (AEC) . 17
7.4 Mixed water at 40 °C (V40) for storage water heaters . 17

2

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prEN 13203-7:2019 (E)
European Foreword
This document (prEN 13203-7:2019) has been prepared by CEN/TC 109, “Central heating boilers using
gaseous fuels,” the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
3

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Introduction
This document refers to clauses of EN 13203-2:2018 or adapts clauses by stating in the corresponding clause,
on the principle:
— shall be according to EN 13203-2:2018, (clause number) with the following modification;
— shall be according to EN 13203-2:2018, (clause number) with the following addition;
— EN 13203-2:2018, (clause number) is replaced by the following;
— EN 13203-2:2018, (clause number) is not applicable.
4

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1 Scope
This document is applicable to gas-fired appliances producing domestic hot water. It applies to condensing
combination boilers with passive flue heat recovery device (PFHRD) that have:
— a heat input not exceeding 400 kW,
— a hot water storage tank capacity (if any) not exceeding 2000 l,
— a declared load profile between M to 4XL.
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.
For this standard, some tests and calculation results of EN 13203-2:2018 are used to calculate the energy
consumptions.
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 13203-2:2018, Gas-fired domestic appliances producing hot water - Part 2: Assessment of energy
consumption
EN 13203-1:2015, Gas fired domestic appliances producing hot water - Part 1: Assessment of performance of hot
water deliveries
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13203-2:2018 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
direct PFHRD contribution
energy contribution by the PFHRD to domestic hot water production recovered from flue gas energy during
domestic hot water production
3.2
indirect PFHRD contribution
energy contribution by the PFHRD to domestic hot water production recovered from flue gas energy during
domestic central heating production
3.3
nominal average heat input
Q
a
average of minimal and maximal heat input as declared by the technical documentation for range rating
appliances
5

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3.4
Passive Flue Heat Recovery Device
PFHRD
device integrated in the appliance or supplied with the appliance to transmit waste heat from the combustion
products to the domestic hot water
3.5
thermal bridge
construction of the combination boiler with PFHRD, where useful heat of the combination boiler is
transmitted to the PFHRD
4 General test conditions
4.1 Reference condition
Shall be according to EN 13203-2:2018, 4.1.
4.2 Measurement uncertainties
4.2.1 General
Shall be according to EN 13203-2:2018, 4.2.1.
4.2.2 Steady-state conditions
Shall be according to EN 13203-2:2018, 4.2.2.
4.3 Test conditions
4.3.1 General
Shall be according to EN 13203-2:2018, 4.3.1, with the following modifications:
The following sentence is not applicable:
“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.”
The following sentence is modified as follows:
“The load profile used for the measurement shall be the one declared according to the technical instruction of
the appliance”.
6

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4.3.2 Test room
Shall be according to EN 13203-2:2018, 4.3.2.
4.3.3 Water supply
For the tests:
— The domestic water pressure is the static inlet pressure under dynamic conditions measured as close as
possible to the product.
— The inlet temperatures are measured immediately upstream of the cold water inlet connection in the
centre of the flow.
— An additional (rapid response) sensor X shall be placed immediately in the domestic water outlet of the
PFHRD construction. This sensor shall be situated in the centre of the flow. If the PFHRD construction is
an integrated part of the boiler, an adapter is needed to place the sensor X. The technical documentation
shall give a figure of this adapter. The appliance for testing shall be delivered with this adapter (see
Figure 1a and Figure 1b).
Water temperatures shall be measured with a rapid response temperature sensor.

a) — Position of the X sensor for boilers with separated secondary heat exchanger
7

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b) — Position of the X sensor for boilers with integrated secondary heat exchanger
Key
a PFHRD g 3 way valve
b Boiler X Temperature measurement point
c Heat exchanger (CH circuit) A DHW in
d Heat exchanger (DHW circuit) B CH in
e CH pump C CH out
f Flue D DHW out
Figure 1 — Positioning of the X sensor for boilers
4.3.4 Initial adjustment of the appliance
Shall be according to EN 13203-2:2018, 4.3.4 with the following modification:
“Load profile XS is not applicable.”
4.3.5 Conditions for the determination of the maximum load profile
EN 13203-2:2018, 4.3.5 is not applicable.
4.3.6 Electrical supply
Shall be according to EN 13203-2:2018, 4.3.6.
The following new Clause 5 is added:
5 Determination of applicability of the present standard
To ensure that the appliance is in the scope of this standard it shall be proved that during central heating
production there is no significant heat transfer to the PFHRD construction.
This heat transfer can be caused by a so called “thermal bridge” where conduction, convection (even by self-
circulation in a single tube with a net water flow of zero) and radiation during the production of central
heating water can occur.
8

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Figure 2 — Determination of applicability of the present standard
Test method:
a) The domestic hot water circuit including the PFHRD shall be cooled by a flow of 10 °C water with the
nominal flow rate according to EN 13203-1:2015 (5.2), till thermal equilibrium in the appliance water
temperature (D in Figure 1) is reached. After that, this flow will continue for 10 min.
b) After that the central heating circuit (including the primary heat exchanger) shall be heated up from an
external heat source under the conditions of a nominal central heating flow rate at an average
temperature of 70 °C ± 1 K until thermal equilibrium is reached. 60 min after this thermal equilibrium,
the circulation over the central heating circuit is stopped.
c) One minute after the circulation stop over the central heating circuit, a domestic water draw off with cold
water of 10 °C and a water flow of 0,5 to 1,0 l/min is started. During this draw off, the water flow, the cold
water inlet temperature T and the water outlet temperature of the PFHRD (T of sensor X) shall be
DHW-in X
measured with a sample rate not less than once per second. The draw off will be stopped when T ≤ T
x DHW-
+ 1 K during 10 (±1) seconds.
in
The thermal bridge energy (Q ) in watt-hour (Wh) shall be calculated with the following formula:
tb
t
Q=1000⋅⋅c D ∆T t dt (1)
( )
tb w
∫
0
9

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...