SIST EN 15378-3:2018

Energy performance of buildings - Heating and DHW systems in buildings - Part 3: Measured energy performance, Module M3-10, M8-10

This standard specifies methods to assess the energy performance to provide heating and domestic hot water to a building based on measurements.
This standard covers the assessment of the heating and domestic hot water energy performance of a building or of building elements based on measurements. This includes:
-   assessment of the heating and domestic hot water performance of the building based on measurement of the amount of delivered energy carriers;
-   assessment of the energy performance of systems, subsystems and building elements, based on measurements.
This standard does not cover measured energy performance on ventilation, cooling, air conditioning and lighting systems.
Figure 1 shows the relative position of this standard within the EPB standards.

Energetische Bewertung von Gebäuden - Heizungsanlagen und Trinkwassererwärmung in Gebäuden - Teil 3: Gemessene Gesamtenergieeffizienz, Module M3-10, M8-10

Dieses Dokument legt Verfahren zur auf Messungen basierenden Beurteilung der Gesamtenergieeffizienz für die Bereitstellung von Wärme und erwärmtem Trinkwasser für ein Gebäude fest.
Diese Norm deckt die Beurteilung der Gesamtenergieeffizienz der Raumheizung und Versorgung mit erwärmtem Trinkwasser eines Gebäudes oder von Gebäudeelementen anhand von Messungen ab. Dazu gehört:
-   die Beurteilung der auf die Raumheizung und die Trinkwassererwärmung bezogene Leistung des Gebäudes anhand der Menge an gelieferten Energieträgern;
-   die Beurteilung der Gesamtenergieeffizienz von Systemen, Teilsystemen und Gebäudeelementen anhand von Messungen.
Diese Norm gilt nicht für die Messung der Gesamtenergieeffizienz an Lüftungs-, Kühlungs-, Klimatisierungs- und Beleuchtungssystemen.
Bild 1 zeigt die relative Position dieser Norm innerhalb des EPBD-Normenpakets.

Performance énergétique des bâtiments - Systèmes de chauffage et production d’eau chaude sanitaire dans les bâtiments - Partie 3 : Performance énergétique mesurée, Module M3-10, M8-10

La présente norme spécifie des méthodes d’évaluation de la performance énergétique pour la fourniture de chauffage et d’eau chaude sanitaire à un bâtiment sur la base de mesurages.
La présente norme couvre l’évaluation de la performance énergétique du chauffage et de la production d’eau chaude sanitaire d’un bâtiment ou d’éléments de bâtiment sur la base de mesurages. Cela comprend :
-   l’évaluation de la performance du chauffage et de la production d’eau chaude sanitaire du bâtiment sur la base du mesurage de la quantité pour chaque type d’énergie reçue de l’extérieur ;
-   l’évaluation de la performance énergétique des systèmes, sous-systèmes et éléments de bâtiment, sur la base de mesurages.
La présente norme ne couvre pas la performance énergétique mesurée des systèmes de ventilation, refroidissement, conditionnement d’air et éclairage.
La Figure 1 illustre la position relative de la présente norme dans la série de normes PEB.

Energijske lastnosti stavb - Sistemi za ogrevanje stavb in pripravo tople sanitarne vode - 3. del: Izmerjena energijska učinkovitost - Modula M3-10 in M8-10

Ta standard določa metode za ocenjevanje energijske učinkovitosti za ogrevanje in gospodinjsko toplo vodo za stavbo glede na meritve.
Ta standard zajema oceno energijske učinkovitosti ogrevanja in gospodinjske tople vode za stavbo ali za gradbene elemente glede na meritve. To vključuje:
– oceno učinkovitosti ogrevanja in gospodinjske tople vode stavbe na podlagi meritve količine dovedenih nosilcev energije;
– oceno energijske učinkovitosti sistemov, podsistemov in elementov stavbe na podlagi meritev.
Ta standard ne zajema izmerjene energetske učinkovitosti v sistemih prezračevanja, hlajenja, klimatizacije in osvetlitve.
1. Slika prikazuje relativen položaj tega standarda v standardih EPB.

General Information

• Status: Published
• Public Enquiry End Date: 08-Feb-2015
• Publication Date: 17-Apr-2018
• ICS: 91.140.10 - Central heating systems
• ICS: 91.140.65 - Water heating equipment
• Technical Committee: OGS - Heating for buildings
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Dec-2017
• Due Date: 16-Feb-2018
• Completion Date: 18-Apr-2018
• Directive: 2010/31/EU - Directive 2010/31/eu of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast)
• Mandate: M/480 - Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of standards for a methodology calculating the integrated energy performance of buildings and promoting the energy efficiency of buildings, in accordance with the terms set in the recast of the Directive on the energy performance buildings (2010/31/EU)
• Ref Project: EN 15378-3:2017 - Energy performance of buildings - Heating and DHW systems in buildings - Part 3: Measured energy performance, Module M3-10, M8-10

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 15378-3:2018
01-maj-2018
(QHUJLMVNHODVWQRVWLVWDYE6LVWHPL]DRJUHYDQMHVWDYELQSULSUDYRWRSOHVDQLWDUQH
YRGHGHO,]PHUMHQDHQHUJLMVNDXþLQNRYLWRVW0RGXOD0LQ0
Energy performance of buildings - Heating and DHW systems in buildings - Part 3:
Measured energy performance, Module M3-10, M8-10
Energetische Bewertung von Gebäuden - Heizungsanlagen und Trinkwassererwärmung
in Gebäuden - Teil 3: Gemessene Gesamtenergieeffizienz, Module M3-10, M8-10
Performance énergétique des bâtiments - Systèmes de chauffage et production d’eau
chaude sanitaire dans les bâtiments - Partie 3 : Performance énergétique mesurée,
Module M3-10, M8-10
Ta slovenski standard je istoveten z: EN 15378-3:2017
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
91.140.65 Oprema za ogrevanje vode Water heating equipment
SIST EN 15378-3:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 15378-3:2018

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SIST EN 15378-3:2018


EN 15378-3
EUROPEAN STANDARD

NORME EUROPÉENNE

April 2017
EUROPÄISCHE NORM
ICS 91.140.10
English Version

Energy performance of buildings - Heating and DHW
systems in buildings - Part 3: Measured energy
performance, Module M3-10, M8-10
Performance énergétique des bâtiments - Systèmes de Energetische Bewertung von Gebäuden -
chauffage et production d'eau chaude sanitaire dans les Heizungsanlagen und Trinkwassererwärmung in
bâtiments - Partie 3 : Performance énergétique Gebäuden - Teil 3: Gemessene Gesamtenergieeffizienz,
mesurée, Module M3-10, M8-10 Module M3-10, M8-10
This European Standard was approved by CEN on 27 February 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15378-3:2017 E
worldwide for CEN national Members.

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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 8
2 Normative references . 11
3 Terms and definitions . 11
4 Symbols, subscripts and abbreviations. 11
4.1 Symbols . 11
4.2 Subscripts . 12
4.3 Abbreviations . 13
5 Description of the methods . 13
5.1 Available procedures . 13
5.2 Assessment of measured heating and domestic hot water delivered energy . 13
5.2.1 Output of the method . 13
5.2.2 Optional procedures . 13
5.2.3 Validation of measured delivered energy assessment . 14
5.2.4 Correction according to standard use and/or climate . 14
5.3 Assessment of measured boiler combustion efficiency . 14
5.3.1 Output of the method . 14
5.3.2 Optional methods . 15
5.4 Assessment of boiler seasonal efficiency . 15
5.4.1 Output of the method . 15
5.4.2 Optional methods . 15
5.5 Domestic hot water system efficiency . 15
5.5.1 Output of the method . 15
5.5.2 Optional methods . 15
6 Measured delivered energy for space heating and domestic hot water . 16
6.1 Output data . 16
6.2 Assessment and measurement periods and intervals . 16
6.3 Input data . 16
6.3.1 Data on delivered energy carrier amount . 16
6.3.2 Constants and physical data . 17
6.4 Assessment of delivered and exported energy carriers amount . 18
6.4.1 General . 18
6.4.2 Metered energy carriers (electricity, gas, district heating and cooling) . 18
6.4.3 Liquid fuels in tanks or small containers . 19
6.4.4 Solid fuels . 20
6.4.5 Fuel with hour counter . 20
6.4.6 Electrical energy measurement . 21
6.5 Data about boundary conditions . 21
6.5.1 General . 21
6.5.2 Climatic data . 22
6.5.3 Building use schedule and internal temperature. 22
6.5.4 Domestic hot water used . 24
6.6 Converting to delivered and exported energy . 24
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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
6.7 Preparation of data . 24
6.7.1 Reporting raw data . 24
6.7.2 Validating raw data for measured delivered energy correction . 25
6.8 Interpolation of seasonal measurements . 26
6.8.1 Data preparation . 26
6.8.2 Separating uses and services . 26
6.8.3 Space heating delivered energy correction for indoor temperature and climate . 28
6.8.4 Seasonal values. 29
6.8.5 Interpolation of seasonal delivered energy . 29
6.8.6 Measured specific heat loss H . 30
meas
6.8.7 Validation criteria . 30
6.9 Energy signature method . 31
6.9.1 Data preparation . 31
6.9.2 Linear regression in heating mode . 31
6.9.3 Linear regression in non-heating mode . 31
6.9.4 Heating start external temperature. 31
6.9.5 Estimated internal temperature during heating season . 31
6.9.6 Standardized average heating power during the heating season . 32
6.9.7 Standardized delivered energy during the heating season. 32
6.9.8 Validation criteria . 32
6.9.9 Measured domestic hot water delivered energy . 33
6.10 Special cases . 33
6.11 Plain reporting . 33
6.12 Exported energy . 33
6.13 Reporting . 33
6.14 Limits of application . 34
6.15 Linear regression sub procedure . 34
6.15.1 General . 34
6.15.2 Output data . 34
6.15.3 Input data . 34
6.15.4 Calculation procedure. 34
7 Boiler combustion efficiency . 35
7.1 Output data . 35
7.2 Input data . 36
7.3 Measuring procedure . 36
7.4 Combustion efficiency calculation . 37
7.4.1 General . 37
7.4.2 Sensible heat loss factor α . 38
ch,on
7.4.3 Condensation latent heat recovery factor α . 38
cond
7.5 Reporting . 40
8 Assessment of seasonal boiler efficiency . 40
8.1 Output data . 40
8.2 Input data . 41
8.3 Available methods . 41
8.3.1 Boiler cycling method . 41
8.3.2 Total stand-by losses method . 41
8.4 Boiler β (average load) determination. 42
cmb
8.4.1 Introduction . 42
8.4.2 Fuel use method . 42
8.4.3 Operation hour counter method . 42
8.5 Estimation of loss factors . 42
8.5.1 Losses through the envelope (radiation losses) . 42
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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
8.5.2 Losses through the chimney with burner off . 43
8.5.3 Total stand-by losses . 44
8.6 Reporting . 45
9 Assessment of measured domestic hot water delivered energy and system efficiency . 45
9.1 Domestic hot water delivered energy . 45
9.1.1 Domestic hot water volume measurement not available . 45
9.1.2 With domestic hot water production measurement . 45
9.2 Domestic hot water system efficiency . 47
9.3 Reporting . 47
10 Assessment of measured heat pump efficiency . 47
11 Assessment of the energy performance for other services . 48
12 Quality control . 48
13 Compliance check. 48
Annex A (normative) Template for the definition of inspection levels, choices, input data
and references . 49
A.1 Introduction . 49
A.2 References . 49
A.3 Default data for measured energy calculation . 50
A.4 Default values for non EPBD uses of fuels . 52
A.5 Default values for combustion efficiency . 53
A.6 Default values for boiler seasonal efficiency . 53
Annex B (informative) Default choices, input data and references . 55
B.1 Introduction . 55
B.2 References . 55
B.3 Default data for measured energy calculation . 56
B.4 Default values for non EPBD uses of fuels . 60
B.5 Default values for combustion efficiency calculation . 60
B.6 Default values for boiler seasonal efficiency . 61
Annex C (informative) Template for the input data preparation and presentation . 62
Annex D (informative) Measured delivered energy assessment flowchart . 64
Bibliography . 65
4

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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
European foreword
This document (EN 15378-3:2017) has been prepared by Technical Committee CEN/TC 228 “Heating
systems and water based cooling systems in buildings”, the secretariat of which is held by DIN.
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 October 2017, and conflicting national standards shall
be withdrawn at the latest by October 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
5

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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
Introduction
This standard is part of a series of standards aiming at international harmonization of the methodology
for the assessment of the energy performance of buildings, called “set of EPB standards “.
All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency.
All EPB standards provide a certain flexibility with regard to the methods, the required input data and
references to other EPB standards, by the introduction of a normative template in Annex A and Annex B
with informative default choices.
For the correct use of this standard a normative template is given in Annex A to specify these choices.
Informative default choices are provided in Annex B.
The main target group of this standard are all the users of the set of EPB standards (e.g. architects,
engineers, regulators).
Use by or for regulators: In case the standard is used in the context of national or regional legal
requirements, mandatory choices may be given at national or regional level for such specific
applications. These choices (either the informative default choices from Annex B or choices adapted to
national / regional needs, but in any case following the template of this Annex A) can be made available
as national annex or as separate (e.g. legal) document (national data sheet).
NOTE 1 So in this case:
• the regulators will specify the choices;
• the individual user will apply the standard to assess the energy performance of a building, and thereby use
the choices made by the regulators.
Topics addressed in this standard can be subject to public regulation. Public regulation on the same
topics can override the default values in Annex B of this standard. Public regulation on the same topics
can even, for certain applications, override the use of this standard. Legal requirements and choices are
in general not published in standards but in legal documents. In order to avoid double publications and
difficult updating of double documents, a national annex may refer to the legal texts where national
choices have been made by public authorities. Different national annexes or national data sheets are
possible, for different applications.
It is expected, if the default values, choices and references to other EPB standards in Annex B are not
followed due to national regulations, policy or traditions, that:
— national or regional authorities prepare data sheets containing the choices and national or regional
values, according to the model in Annex A. In this case the national annex (e.g. NA) refers to this
text;
— or, by default, the national standards body will consider the possibility to add or include a national
annex in agreement with the template of Annex A, in accordance to the legal documents that give
national or regional values and choices.
Further target groups are users of the voluntary common European Union certification scheme for the
energy performance of non-residential buildings (EPBD art.11.9) and any other Pan EU parties wanting
to motivate their assumptions by classifying the building energy performance for a dedicated building
stock
More information is provided in the Technical Report accompanying this standard (CEN/TR 15378-
4:2017).
TC 228 deals with heating systems in buildings. Subjects covered by TC 228 are:
6

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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
— energy performance calculation for heating systems;
— inspection of heating systems;
— design of heating systems;
— installation and commissioning of heating systems.
This is a new standard developed during mandate M480. It incorporates provisions previously stated in
EN 15603:2008 and EN 15378:2008.
Default references to EPB standards other than EN ISO 52000-1:2017 are identified by the EPB module
code number and they are given in Annex A (normative template) and Annex B (informative default
choice).
NOTE 2 Example of EPB module code number: M5–5, or M5–5.1 (if module M5–5 is subdivided), or M5–5/1 (if
reference to a specific clause of the standard covering M5–5).
7

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SIST EN 15378-3:2018
EN 15378-3:2017 (E)
1 Scope
This European Standard specifies methods to assess the delivered energy for space heating and
domestic hot water energy performance of a building based on measurements during the operation and
occupancy phase. This includes:
— assessment of the amount of delivered energy carriers for space heating and domestic hot water
preparation based on measurement;
— assessment of the energy performance indicators of heating and domestic hot water systems and
subsystems based on measurements.
This standard does not cover the measurement of delivered energy for ventilation, cooling, air
conditioning and lighting systems.
This standard includes procedures to correct measured delivered energy according to climate and
building use.
Weighting (e.g. conversion into primary energy, cost, CO emission) of the measured delivered energy
2
and assessment of the energy performance are covered in EN ISO 52000-1:2017.
Table 1 shows the relative position of this standard within the set of EPB standards in the context of the
modular structure as set out in EN ISO 52000-1:2017.
NOTE 1 In CEN ISO/TR 52000-2:2017 the same table can be found, with, for each module, the numbers of the
relevant EPB standards and accompanying technical reports that are published or in preparation.
NOTE 2 The modules represent EPB standards, although one EPB standard may cover more than one module
and one mod
...

SLOVENSKI STANDARD
oSIST prEN 15378-3:2015
01-januar-2015
2JUHYDOQLVLVWHPLLQVLVWHPL]DKODMHQMH]YRGRYVWDYEDK6LVWHPL]DRJUHYDQMH
SURVWRUDLQSLWQHYRGHYVWDYEDKGHO,]PHUMHQDHQHUJHWVNDXþLQNRYLWRVW
Heating systems and water based cooling systems in buildings - Heating systems and
DHW in buildings - Part 3: Measured energy performance
Heizungsanlagen und wassergeführte Kühlanlagen in Gebäuden - Heizungsanlagen und
Trinkwassererwärmung in Gebäuden - Teil 3: Gemessene Gesamtenergieeffizienz
Systèmes de chauffage et systèmes de refroidissement à eau dans les bâtiments -
Systèmes de chauffage et production d'eau chaude sanitaire dans les bâtiments - Partie
3: Performance énergétique mesurée
Ta slovenski standard je istoveten z: prEN 15378-3
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
91.140.65 Oprema za ogrevanje vode Water heating equipment
oSIST prEN 15378-3:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 15378-3:2015

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oSIST prEN 15378-3:2015

EUROPEAN STANDARD
DRAFT
prEN 15378-3
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2014
ICS 91.140.10
English Version
Heating systems and water based cooling systems in buildings -
Heating systems and DHW in buildings - Part 3: Measured
energy performance
Systèmes de chauffage et systèmes de refroidissement à Heizungsanlagen und wassergeführte Kühlanlagen in
eau dans les bâtiments - Systèmes de chauffage et Gebäuden - Heizungsanlagen und Trinkwassererwärmung
production d'eau chaude sanitaire dans les bâtiments - in Gebäuden - Teil 3: Gemessene Gesamtenergieeffizienz
Partie 3: Performance énergétique mesurée
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 228.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15378-3:2014 E
worldwide for CEN national Members.

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oSIST prEN 15378-3:2015
prEN 15378-3:2014 (E)
Contents Page
Foreword .4
1 Scope .7
2 Normative references .7
3 Terms and definitions .7
4 Symbols and abbreviations .8
4.1 Symbols .8
4.2 Subscripts .8
5 Description of the methods.9
5.1 Available procedures.9
5.2 Assessment of measured heating and domestic hot water delivered energy .9
5.3 Assessment of measured boiler combustion efficiency . 10
5.4 Assessment of boiler seasonal efficiency . 10
5.5 Domestic hot water system efficiency. 11
5.6 Application data . 11
6 Measured delivered energy for heating . 11
6.1 Output data . 11
6.2 Assessment and measurement periods and intervals . 12
6.3 Input data . 12
6.4 Assessment of delivered and exported energy carriers amount . 13
6.5 Data about boundary conditions . 17
6.6 Converting to delivered and exported energy . 19
6.7 Preparation of data . 19
6.8 Interpolation of seasonal measurements . 21
6.9 Energy signature method . 25
6.10 Special cases . 27
6.11 Plain reporting . 27
6.12 Exported energy . 28
6.13 Reporting . 28
6.14 Limits of application . 28
6.15 Linear regression sub procedure . 28
7 Boiler combustion efficiency . 30
7.1 Output data . 30
7.2 Input data . 30
7.3 Measuring procedure . 31
7.4 Combustion efficiency calculation . 31
7.5 Condensation latent heat calculation . 31
8 Assessment of measured heating generation efficiency . 34
8.1 Output data . 34
8.2 Input data . 34
8.3 Available methods . 35
8.4 Boiler β (average load) determination . 35
cmb
8.5 Estimation of loss factors . 36
8.6 Reporting . 39
9 Assessment of measured domestic hot water energy performance and system efficiency . 39
9.1 Domestic hot water energy performance . 39
9.2 Domestic hot water efficiency . 40
9.3 Reporting . 40
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oSIST prEN 15378-3:2015
prEN 15378-3:2014 (E)
10 Assessment of the energy performance for other services . 40
11 Quality control . 41
12 Compliance check . 41
Annex A (normative) Template for the specification of application data . 42
A.1 Properties of energy carriers . 42
A.2 Default data for measured energy calculation . 43
A.3 Default values for non EPBD uses of fuels . 45
A.4 Default values for combustion efficiency . 45
A.5 Default values for boiler seasonal efficiency . 46
Annex B (informative) Default application data . 47
B.1 Properties of energy carriers . 47
B.2 Default data for measured energy calculation . 49
B.3 Default values for non EPBD uses of fuels . 51
B.4 Default values for combustion efficiency . 52
B.5 Default values for boiler seasonal efficiency . 52
Annex C (informative) Template for the input data preparation and presentation . 54
Annex D (informative) Delivered energy assessment flowchart . 55
Bibliography . 56

3

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oSIST prEN 15378-3:2015
prEN 15378-3:2014 (E)
Foreword
This document (prEN 15378-3:2014) has been prepared by Technical Committee CEN/TC 228 “Heating
systems and water based cooling systems in buildings”, the secretariat of which is held by DIN.
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.
4

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oSIST prEN 15378-3:2015
prEN 15378-3:2014 (E)
Introduction
1)
This standard is part of a set of standards developed to support the EPBD implementation, hereafter called
"EPB standards".
EPB standards deal with energy performance calculation and other related aspects (like system sizing) to
provide the building services considered in the EPBD directive.
TC 228 deals with heating systems in buildings. Subjects covered by TC 228 are:
 energy performance calculation for heating systems;
 inspection of heating systems;
 design of heating systems;
 installation and commissioning of heating systems.
This is a new standard developed during mandate M480. It incorporates provisions previously stated in EN
15603:2008 and EN 15378:2008.
Figure 1 shows the relative position of this standard within the EPB standards.

1) Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of
buildings (recast)
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Building
Overarching Technical Building Systems
(as such)


sub M1 sub sub
M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 1 1

1 General 1 General 1 General 15316-1   15316-1
Common terms
and definitions; Building Energy
2 2 2 Needs   12831-3 ?
symbols, units Needs

and subscripts
(Free) Indoor
Maximum Load
3 Applications 3 Conditions without 3 12831-1   12831-3
and Power
Systems
Ways to Ways to Express Ways to
4 Express Energy  4 Energy 4 Express Energy 15316-1   15316-1
Performance Performance Performance
Building
Functions and Heat Transfer by Emission &
5 5 5 15316-2 15316-2
Building Transmission control
Boundaries
Building
Heat Transfer by
Occupancy and Distribution &
6 6 Infiltration and 6 15316-3 15316-3  15316-3
Operating control
Ventilation
Conditions
Aggregation of
Energy Internal Storage & 15316-5
7 7 7 15316-5
Services and Heat Gains control 15316-4-3
Energy Carriers
Building Solar
8 8 8 Generation
Partitioning Heat Gains

Combustion 15316-4-
   8-1   15316-4-1
boilers 1
15316-4- 15316-4-
   8-2 Heat pumps   15316-4-2
2 2
Thermal solar
15316-4-
   8-3   15316-4-3  15316-4-3
3
Photovoltaics
On-site 15316-4-
8-4
    15316-4-4  15316-4-4
cogeneration 4
District heating 15316-4- 15316-4-
   8-5    15316-4-5
and cooling 5 5
Direct electrical 15316-4-
8-6
    15316-4-6
heater 6
   8-7 Wind turbines     15316-4-7
Radiant 15316-4-
   8-8
heating, stoves 8
Load
Calculated
Building Dynamics dispatching and
9 Energy 9 9
(thermal mass) operating
Performance
conditions
Measured  Measured
Measured Energy
10 Energy 10 10 Energy 15378-3   15378-3
Performance
Performance Performance
11 Inspection 11 Inspection 11 Inspection 15378-1   15378-1
Ways to
12 Express Indoor 12 -- 12 BMS
Comfort
External
13 Environment
Conditions
Economic 1545
14
Calculation 9-1
Figure 1 — Position of EN 15378-3 within the modular structure
6
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidificatio
n
Domestic Hot
water
Lighting
Building
automation &
control
Electricity
production

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1 Scope
This standard specifies methods to assess the energy performance to provide heating and domestic hot water
to a building based on measurements.
This standard covers the assessment of the heating and domestic hot water energy performance of a building
or of building elements based on measurements. This includes:
 assessment of the heating and domestic hot water performance of the building based on measurement of
the amount of delivered energy carriers;
 assessment of the energy performance of systems, subsystems and building elements, based on
measurements.
This standard does not cover measured energy performance on ventilation, cooling, air conditioning and
lighting systems.
Figure 1 shows the relative position of this standard within the EPB standards.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN ISO 7345:1995, Thermal insulation. Physical quantities and definitions
prEN 15603:2013, Energy performance of buildings — Overarching standard EPBD
EN 50379:2012, Specification for portable electrical apparatus designed to measure combustion flue gas
parameters of heating appliances
EN ISO 13790:2008, Energy performance of buildings — Calculation of energy use for space heating and
cooling
EN 15251, Indoor environmental input parameters for design and assessment of energy performance of
buildings addressing indoor air quality, thermal environment, lighting and acoustics
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN ISO 7345:1995,
prEN 15603:2013 and the following specific definitions apply.
3.1
Assessment period
Time for which the measured amount of energy shall be determined.
3.2
Measurement interval
Time between individual measurements.
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3.3
Measurement period
Interval of time covered by measurement intervals.
4 Symbols and abbreviations
4.1 Symbols
For the purposes of this European Standard, the symbols given in prEN 15603:2013 and the specific symbols
listed in table 1 apply
Table 1 — Symbols and units
Symbol Name of quantity Unit
DD Degree-days °Cday
M Amount of energy carrier kg, l, Sm³, m³, Nm³, kWh

R Meter reading kg, l, Sm³, m³, Nm³, kWh
D Date Calendar day
n number of values -
X Independent variable any
Y Dependent variable any
1
a Constant term of the regression line any ( )
b Angular coefficient (slope) of the regression line any
1
δ mean error any ( )
R Correlation coefficient -
ξ absolute humidity kg/Nm³
m mass kg
H calorific value
α loss factor -
h latent heat J/kg or Wh/kg
NOTES to table 1
1
( ) the unit shall be the same as Y

4.2 Subscripts
For the purposes of this European Standard, the subscripts given in prEN 15603:2013, and the specific
subscripts listed in table 2 apply.
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Table 2 —Subscripts
a Angular coefficient eq equivalent norm normalised
abs absolute (temperature and fg flue gas O2 oxygen
pressure)
adj Adjusted fin final op operation
b Base coefficient ge generator envelope pmp pump
ch chimney gnr generator (operating time) real actual conditions
cmb combustion H0 heating shut-off ref reference
CO2 carbon dioxide H2O water vapour reg regression
gross (superior calorific value)
cold cold (domestic water) HnH heating and non-heating s
cond condensing hot at hot delivery temperature st stoichiometric
(domestic water)
corr corrected i net (inferior calorific value) stock in the storage
count counter ini initial sup supplied
dry dry nH non-heating
5 Description of the methods
5.1 Available procedures
This standard includes the following procedures:
 assessment of measured delivered energy for heating and domestic hot water energy
 assessment of measured boiler combustion efficiency
 assessment of measured seasonal boiler efficiency
 assessment of measured seasonal domestic hot water system efficiency.
5.2 Assessment of measured heating and domestic hot water delivered energy
5.2.1 Output of the method
This method covers the assessment of measured delivered energy for heating and/or domestic hot water
production.
The output is the amount of delivered and exported energy carriers E and E
del;meas;cr,i exp;meas;cr,i
5.2.2 Optional procedures
This standard includes procedures to adjust measured delivered energy according to actual climate and
conditions of use. The delivered energy is evaluated by energy carrier and, where applicable, by service. The
weighting according to weighting factors (e. g. primary energy, CO2 emissions) is covered in
prEN 15603:2013.
The procedure consists of the following sequence with the specified alternatives for each step:
1) getting the amount of delivered and exported energy carriers:
i) meters readings;
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ii) invoice analysis;
iii) other delivered energy estimation techniques;
2) getting data about corresponding boundary conditions (building use, climate) etc.
3) separating other uses and services than heating;
4) separating domestic hot water from other uses;
5) neutralizing/adjusting procedures for user behaviour and climate;
i) degree days correlation;
ii) energy signature;
iii) domestic hot water volume;
6) validating the data;
7) reporting.
NOTE Measured energy rating is also referred to as “operational rating”.
5.2.3 Validation of measured rating
Measured rating is valid only if all conditions specified in the standard are satisfied (e. g. number of available
measurements, source of data, results validation criteria, etc.).
If the measured energy performance is not valid, new measurements shall be performed.
NOTE if a measured energy performance is envisaged, this should be taken into account at design stage: the
necessary instruments should be installed and recording procedures should be applied. Otherwise it is not
likely that data of acceptable quality will be found.
5.3 Assessment of measured boiler combustion efficiency
5.3.1 Output of the method
Following application of this method, the following data are obtained:
 α , losses through the chimney with burner on;
ch;on
 α , condensation latent heat recovery factor;
cond
 η ,combustion efficiency.
comb
5.3.2 Optional methods
Only one method is given, based on flue gas analysis
5.4 Assessment of boiler seasonal efficiency
5.4.1 Output of the method
Following application of this method, the following data are obtained:
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 η boiler seasonal efficiency;
blr;seas
 β seasonal boiler load factor.
cmb;seas
5.4.2 Optional methods
The procedure consists of on the following sequence with the specified alternatives for each step:
 measuring combustion efficiency η ;
cmb
 assessing seasonal load factor β ;
cmb;seas
 assessing heat loss factors:
 from tabulated values;
 according to optional specific measurement procedure
 calculating estimated boiler seasonal efficiency η ;
blr;seas
 boiler cycling method;
 total stand-by losses method.
5.5 Domestic hot water system efficiency
5.5.1 Output of the method
Following application of this method, the following data are obtained:
 η measured seasonal domestic hot water production efficiency
W;sys;meas
5.5.2 Optional methods
The procedure consists of the following steps:
 Assessing domestic hot water produced and energy need
 Assessing delivered energy carriers
 Assessing domestic hot water efficiency
5.6 Application data
The required application data shall be specified according to the format given in normative annex A.
Default application data is given in informative annex B.
6 Measured delivered energy for heating
6.1 Output data
The output data of this method are listed in table 3.
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Table 3 – Measured heating and domestic hot water energy performance output data
Intended
Description Symbol Unit destination
module
1
Delivered energy carrier j name CAR_NAMEj ( ) kWh M1-10
Measured normalised delivered energy
E kWh M1-10
del;H;norm;DD
carrier j for heating
Measured delivered energy carrier j for
Edel;cr,j;meas;W kWh M1-10
domestic hot water
Amount of exported energy carrier Eexp;cr,j;meas kWh M1-10
1
( ) CAR_NAMEj is the name of energy carrier j

6.2 Assessment and measurement periods and intervals
The assessment period for heating shall be one heating season.
The assessment period for domestic hot water production shall be one year.
The measurement intervals can be yearly, seasonal, monthly, weekly or daily.
The total measurement period is the total time covered by measurement intervals.
NOTE Measurements are seldom available on the exact required date. Where applicable, tolerances and procedures
to adjust measurements are given in the following.
6.3 Input data
6.3.1 Data on delivered energy carrier amount
The procedure is based on the acquisition of the following data:
Table 4 – Measured input data
Origin
Name Symbol Unit Range Varying
Module
Meter readings R various 0…∞ Local YES
cr,i,t
Day of readings D date 0…∞ Local YES
meas,i,t
Local
Pressure of metered gas P Pa abs 0…∞ YES
meas;abs
Temperature of metered gas T K 250…350 Local YES
meas
Local
Proportionality coefficient of meter c various 0…∞ YES
count
Local
Fuel amount in stock M various 0…∞ YES
stock;cr,i,t;
Local
Amount of fuel supply M various 0…∞ YES
sup;cr,i,t
Absorbed electrical power of each Local
Φel,i W 0…∞ YES
device i
Operation time of device i t s or h 0…∞ Local YES
op,i
Measured external air temperature ϑ °C -50…50 Local YES
ext,t
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Measured internal air temperature ϑ °C -50…50 Local YES
int,t
Volume of space covered by
V m³ 0…∞ Local YES
j
internal temperature sensor j.
Power of non EPB uses Φ W Local YES
0…∞
del;nEPus
Reference internal temperature for
ϑ °C -50…50 Local YES
int;ref,k
spaces
Net or gross volume of spaces V m³ Local YES
0…∞
j
Ratio of heat gains and losses γ - 0…10 Local YES
H
Utilization factor of heat gains η - 0…1 Local YES
H;gn
Reference degree days DD 0…10000 Local YES
ref

6.3.2 Data on properties of energy carriers
Calorific values and densities of fuels shall be specified according to the template given in clause A.1 of
normative annex A. Default values are given in clause B.1 of informative annex B.
6.4 Assessment of delivered and exported energy carriers amount
6.4.1 General
The delivered and exported energy carrier flows at the assessment boundary shall be identified and listed.
For each measurement of an energy carrier flow, one shall identify:
 the supplied generators, devices and appliances;
 the service(s) provided by each supplied generator, device and appliance, including non-EPB services, if
any;
 if the services are provided to the whole building or only to part of it.
Energy carrier use evaluation for a heating and domestic hot water systems shall take into account:
 the main energy carrier(s);
 auxiliary energy.
The source of data can be recorded data, energy bills, or measurements.
Auxiliary energy that is not metered shall be assessed according to 6.4.6.2.
6.4.2 Metered energy carriers (electricity, gas, district heating and cooling)
6.4.2.1 General
The delivered amount of a metered energy carrier during a measurement interval t M is the
del;cr,i,t;meas
difference of two readings of the meter taken at the beginning and at the end of each measurement interval.
M = R - R (1)
del;cr,i,t;meas cr,i,t;fin cr,i,t;ini
where
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R reading at final day D of measurement interval t;
cr,i,t;fin meas,i,t;fin
R reading at initial day D of measurement interval t.
cr,i,t;ini meas,i,t;ini
Readings of meters may be obtained from:
 planned readings (e.g. readings finalised for measurement energy performance assessment);
 maintenance reports;
 previous inspection reports;
 log-books and BACS records;
 invoices or delivery notes of the delivered energy supp
...