SIST EN ISO 13789:2017
(Main)Thermal performance of buildings - Transmission and ventilation heat transfer coefficients - Calculation method (ISO 13789:2017)
Thermal performance of buildings - Transmission and ventilation heat transfer coefficients - Calculation method (ISO 13789:2017)
This document specifies a method and provides conventions for the calculation of the steady‐state
transmission and ventilation heat transfer coefficients of whole buildings and parts of buildings. It is
applicable both to heat loss (internal temperature higher than external temperature) and to heat gain
(internal temperature lower than external temperature). For the purpose of this document, the heated
or cooled space is assumed to be at uniform temperature.
Annex C provides a steady‐state method to calculate the temperature in unconditioned spaces adjacent
to conditioned spaces.
NOTE Table 1 in the Introduction shows the relative position of this document within the set of EPB standards
in the context of the modular structure as set out in ISO 52000-1.
Wärmetechnisches Verhalten von Gebäuden - Spezifischer Transmissions- und Lüftungswärmedurchgangskoeffizient - Berechnungsverfahren (ISO 13789:2017)
Dieses Dokument legt ein Verfahren zur Berechnung des stationären Transmissions- und des stationären Lüftungswärmetransferkoeffizienten von vollständigen Gebäuden und Gebäudeteilen fest und liefert die entsprechenden Vereinbarungen. Es gilt sowohl für den Wärmeverlust (Innentemperatur höher als Außentemperatur) als auch für den Wärmegewinn (Innentemperatur geringer als Außentemperatur). Für die Anwendung dieses Dokuments wird für den beheizten oder gekühlten Raum eine einheitliche Temperatur angenommen.
Anhang C legt ein stationäres Verfahren zur Berechnung der Temperatur in nicht konditionierten Räumen, die an konditionierte Räume angrenzen, fest.
ANMERKUNG Tabelle 1 in der Einleitung zeigt die relative Einordnung dieses Dokuments innerhalb des EPB-Normenpakets im Kontext der in ISO 52000-1 dargelegten modularen Struktur.
Performance thermique des bâtiments - Coefficients de transfert de chaleur par transmission et par renouvellement d'air - Méthode de calcul (ISO 13789:2017)
L'ISO 13789:2017 établit une méthode et des conventions pour le calcul des coefficients de transfert thermique par transmission et par renouvellement d'air, en régime stationnaire, pour des bâtiments complets ou des parties de bâtiments. Il s'applique aux déperditions thermiques (température intérieure supérieure à la température extérieure) comme aux gains thermiques (température intérieure inférieure à la température extérieure). Pour les besoins de l'ISO 13789:2017, la température de l'espace chauffé ou refroidi est supposée uniforme.
L'Annexe C donne une méthode de calcul de la température, en régime stationnaire, dans des espaces non conditionnés adjacents à des espaces conditionnés.
NOTE Le Tableau 1 de l'Introduction indique la position relative de l'ISO 13789:2017dans la série de normes PEB dans le contexte de la structure modulaire définie dans l'ISO 52000‑1.
Toplotne značilnosti stavb - Toplotni koeficienti pri prenosu toplote in prezračevanju - Računska metoda (ISO 13789:2017)
Ta dokument določa metodo in vključuje dogovore za izračun toplotnih koeficientov pri ustaljenem prenosu toplote in prezračevanju v celotnih stavbah ter njihovih delih. Uporablja se tako za toplotne izgube (notranja temperatura je višja od zunanje) kot toplotne dobičke (notranja temperatura je nižja od zunanje). Za namene tega dokumenta se predvideva, da je temperatura ogrevanega ali hlajenega prostora enaka.
V dodatku C je podana ustaljena metoda za izračun temperature v toplotno nereguliranih prostorih poleg toplotno reguliranih prostorov.
OPOMBA: Preglednica 1 v uvodu prikazuje relativno mesto tega dokumenta znotraj skupine standardov EPB v kontekstu modularne strukture, kot je opredeljeno v standardu ISO 52000-1.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13789:2017
01-september-2017
1DGRPHãþD
SIST EN ISO 13789:2008
7RSORWQH]QDþLOQRVWLVWDYE7RSORWQLNRHILFLHQWLSULSUHQRVXWRSORWHLQ
SUH]UDþHYDQMX5DþXQVNDPHWRGD ,62
Thermal performance of buildings - Transmission and ventilation heat transfer
coefficients - Calculation method (ISO 13789:2017)
Wärmetechnisches Verhalten von Gebäuden - Spezifischer Transmissions- und
Lüftungswärmedurchgangskoeffizient - Berechnungsverfahren (ISO 13789:2017)
Performance thermique des bâtiments - Coefficients de transfert de chaleur par
transmission et par renouvellement d'air - Méthode de calcul (ISO 13789:2017)
Ta slovenski standard je istoveten z: EN ISO 13789:2017
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
SIST EN ISO 13789:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13789:2017
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SIST EN ISO 13789:2017
EN ISO 13789
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2017
EUROPÄISCHE NORM
ICS 91.120.10 Supersedes EN ISO 13789:2007
English Version
Thermal performance of buildings - Transmission and
ventilation heat transfer coefficients - Calculation method
(ISO 13789:2017)
Performance thermique des bâtiments - Coefficients de Wärmetechnisches Verhalten von Gebäuden -
transfert de chaleur par transmission et par Spezifischer Transmissions- und
renouvellement d'air - Méthode de calcul (ISO Lüftungswärmedurchgangskoeffizient -
13789:2017) Berechnungsverfahren (ISO 13789:2017)
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 ISO 13789:2017 E
worldwide for CEN national Members.
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SIST EN ISO 13789:2017
EN ISO 13789:2017 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 13789:2017
EN ISO 13789:2017 (E)
European foreword
This document (EN ISO 13789:2017) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with Technical Committee
CEN/TC 89 “Thermal performance of buildings and building components” the secretariat of which is
held by SIS.
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 January 2018 and conflicting national standards shall
be withdrawn at the latest by January 2018.
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.
This document is part of the set of standards and accompanying technical reports on the energy
performance of buildings and has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association (Mandate M/480, see reference [EF3] below).
Directive 2010/31/EU recasting the Directive 2002/91/EC on energy performance of buildings (EPBD,
[EF4]) promotes the improvement of the energy performance of buildings within the European Union,
taking into account all types of energy uses (heating, lighting, cooling, air conditioning, ventilation) and
outdoor climatic and local conditions, as well as indoor climate requirements and cost effectiveness
(Article 1).
The directive requires Member States to adopt measures and tools to achieve the prudent and rational
use of energy resources. In order to achieve those goals, the EPBD requires increasing energy efficiency
and the enhanced use of renewable energies in both new and existing buildings. One tool for this is the
application by Member States of minimum requirements on the energy performance of new buildings
and for existing buildings that are subject to major renovation, as well as for minimum performance
requirements for the building envelope if energy-relevant parts are replaced or retrofitted. Other tools
are energy certification of buildings, inspection of boilers and air-conditioning systems.
The use of European standards increases the accessibility, transparency and objectivity of the energy
performance assessment in the Member States facilitating the comparison of best practices and
supporting the internal market for construction products. The use of EPB standards for calculating
energy performance, as well as for energy performance certification and the inspection of heating
systems and boilers, ventilation and air-conditioning systems will reduce costs compared to developing
different standards at national level.
The first mandate to CEN to develop a set of CEN EPBD standards (M/343, [EF1]), to support the first
edition of the EPBD ([EF2]) resulted in the successful publication of all EPBD related CEN standards in
2007-2008.
Mandate M/480 was issued to review the mandate M/343 as the recast of the EPBD raised the need to
revisit the standards and reformulate and add standards so that they become on the one hand
unambiguous and compatible, and on the other hand a clear and explicit overview of the choices,
boundary conditions and input data that need to be defined at national or regional level. Such national
or regional choices remain necessary, due to differences in climate, culture and building tradition,
3
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SIST EN ISO 13789:2017
EN ISO 13789:2017 (E)
policy and legal frameworks. Consequently, the set of CEN EPBD standards published in 2007-2008 had
to be improved and expanded on the basis of the recast of the EPBD.
The EPB standards are flexible enough to allow for necessary national and regional differentiation and
facilitate Member States implementation and the setting of requirements by the Member States.
Further target groups are users of the voluntary common European Union certification scheme for the
energy performance of non-residential buildings (EPBD article 11.9) and any other regional (e.g. pan
European) parties wanting to motivate their assumptions by classifying the building energy
performance for a dedicated building stock.
This document supersedes EN ISO 13789:2007.
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.
References:
[EF1] EPBD, Directive 2002/91/EC of the European Parliament and of the Council of 16 December
2002 on the energy performance of buildings
[EF2] EPBD Mandate M/343, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and estimating
the environmental impact, in accordance with the terms set forth in Directive 2002/91/EC , 30 January
2004
[EF3] 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 of buildings (2010/31/EU), 14 December 2010
[EF4] EPBD, Recast of the Directive on the energy performance of buildings (2010/31/EU). 14
December 2010
Endorsement notice
The text of ISO 13789:2017 has been approved by CEN as EN ISO 13789:2017 without any modification.
4
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SIST EN ISO 13789:2017
INTERNATIONAL ISO
STANDARD 13789
Third edition
2017-06
Thermal performance of buildings —
Transmission and ventilation heat
transfer coefficients — Calculation
method
Performance thermique des bâtiments — Coefficients de transfert
de chaleur par transmission et par renouvellement d’air — Méthode
de calcul
Reference number
ISO 13789:2017(E)
©
ISO 2017
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and subscripts . 4
4.1 Symbols . 4
4.2 Subscripts . 4
5 Description of the method . 5
5.1 Output . 5
5.2 General description . 5
6 Calculation of heat transfer coefficients . 5
6.1 Output data . 5
6.2 Calculation time intervals . 7
6.3 Input data . 7
6.4 Measurement of dimensions . 8
6.5 Boundaries of conditioned space . 8
7 Transmission heat transfer coefficient .10
7.1 Basic formula .10
7.2 Mean thermal transmittance of building fabric .10
7.3 Direct transmission between internal and external environments .11
7.4 Transmission heat transfer coefficient through the ground .12
7.5 Transmission heat transfer coefficient through unconditioned spaces .12
7.6 Heat transfer to adjacent buildings .13
8 Ventilation heat transfer coefficient .14
9 Additional conventions .14
9.1 General .14
9.2 Transmission heat transfer coefficient through the ground .14
9.3 Variable thermal transmittance .14
9.4 Air change rates of unconditioned spaces .14
9.5 Conventional values of surface heat transfer coefficient .15
10 Report .16
Annex A (normative) Input and method selection data sheet — Template .17
Annex B (informative) Input and method selection data sheet — Default choices .20
Annex C (normative) Temperature in an unconditioned space .23
Bibliography .24
© ISO 2017 – All rights reserved iii
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
ISO 13789 was prepared by ISO Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 2, Calculation methods, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 89, Thermal performance of
buildings and building components, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 13789:2007), which has been technically
revised.
The changes in this third edition are mostly editorial. The document has been re-drafted according to
CEN/TS 16629:2014.
iv © ISO 2017 – All rights reserved
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
Introduction
This document is part of a series aimed at the international harmonization of the methodology for
assessing the energy performance of buildings. Throughout, this series is referred to as a “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 document, a normative template is given in Annex A to specify these choices.
Informative default choices are provided in Annex B.
The main target groups for this document are architects, engineers and regulators.
Use by or for regulators: In case the document 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 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 document to assess the energy performance of a building, and thereby use
the choices made by the regulators.
Topics addressed in this document can be subject to public regulation. Public regulation on the same
topics can override the default values in Annex B. Public regulation on the same topics can even, for
certain applications, override the use of this document. 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 a national annex (e.g. NA) is recommended,
containing a reference to these data sheets;
— 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 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 (ISO/TR 52019-2) accompanying this document.
The subset of EPB standards prepared under the responsibility of ISO/TC 163/SC 2 cover inter alia:
— calculation procedures on the overall energy use and energy performance of buildings;
— calculation procedures on the internal temperature in buildings (e.g. in case of no space heating or
cooling);
— indicators for partial EPB requirements related to thermal energy balance and fabric features;
© ISO 2017 – All rights reserved v
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
— calculation methods covering the performance and thermal, hygrothermal, solar and visual
characteristics of specific parts of the building and specific building elements and components, such
as opaque envelope elements, ground floor, windows and facades.
ISO/TC 163/SC 2 cooperates with other technical committees for the details on appliances, technical
building systems, indoor environment, etc.
This document provides the means (in part) to assess the contribution that building products and
services make to energy conservation and to the overall energy performance of buildings.
The aims of ISO 13789 are
— to clarify the international market through the harmonized definition of intrinsic characteristics of
buildings;
— to help in judging compliance with regulations;
— to provide input data for calculation of annual energy use for heating or cooling of buildings.
The result of the calculations can be used as input for calculation of annual energy use and heating or
cooling load of buildings, for expressing the thermal transmission and/or ventilation characteristics
of a building or for judging compliance with specifications expressed in terms of transmission and/or
ventilation heat transfer coefficients.
Table 1 shows the relative position of this document within the set of EPB standards in the context of
the modular structure as set out in ISO 52000-1.
NOTE 2 In ISO/TR 52000-2, 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 3 The modules represent EPB standards, although one EPB standard could cover more than one module
and one module could be covered by more than one EPB standard, for instance, a simplified and a detailed method
respectively. See also Tables A.1 and B.1.
vi © ISO 2017 – All rights reserved
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
Table 1 — Position of this document (in casu M2-5 and M2-6) within the modular structure of
the set of EPB standards
Building
Overarching Technical building systems
(as such)
Buil
De Do ding
Hu
hu mes auto
Sub Ven mi PV,
Descrip Descrip Descrip Hea Coo mi tic Ligh ma
mo tila difi wind,
tions tions tions ting ling difi hot ting tion
dule tion ca .
ca wat and
tion
tion er cont
rol
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
Common
terms and
Building
definitions;
a
2 energy Needs
symbols,
needs
units and
subscripts
(Free)
Indoor Maximum
Applica-
3 conditions load and
tions
without power
systems
a
The shaded modules are not applicable.
© ISO 2017 – All rights reserved vii
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
Building
Overarching Technical building systems
(as such)
Buil
De Do ding
Hu
hu mes auto
Sub Ven mi PV,
Descrip Descrip Descrip Hea Coo mi tic Ligh ma
mo tila difi wind,
tions tions tions ting ling difi hot ting tion
dule tion ca .
ca wat and
tion
tion er cont
rol
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Ways to
Ways to Ways to
express
express express
4 energy
energy per- energy per-
perfor-
formance formance
mance
Building
Heat
catego-
transfer by ISO Emission
5 ries and
transmis- 13689 and control
building
sion
boundaries
Building Heat
occupan- transfer by Distribu-
ISO
6 cy and infiltration tion and
13689
operating and venti- control
conditions lation
Aggre-
gation of
Internal
energy Storage
7 heat
services and control
gains
and energy
carriers
Building Solar heat Generation
8
zoning gains and control
Load
Calculated Building
dispatch-
energy dynamics
9 ing and
perfor- (thermal
operating
mance mass)
conditions
Measured Measured Measured
energy energy energy
10
perfor- perfor- perfor-
mance mance mance
11 Inspection Inspection Inspection
a
The shaded modules are not applicable.
viii © ISO 2017 – All rights reserved
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SIST EN ISO 13789:2017
ISO 13789:2017(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Building
Overarching Technical building systems
(as such)
Buil
De Do ding
Hu
hu mes auto
Sub Ven mi PV,
Descrip Descrip Descrip Hea Coo mi tic Ligh ma
mo tila difi wind,
tions tions tions ting ling difi hot ting tion
dule tion ca .
ca wat and
tion
tion er cont
rol
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Ways to
express
12 BMS
indoor
comfort
External
environ-
13
ment
conditions
Economic
14
calculation
a
The shaded modules are not applicable.
© ISO 2017 – All rights reserved ix
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SIST EN ISO 13789:2017
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SIST EN ISO 13789:2017
INTERNATIONAL STANDARD ISO 13789:2017(E)
Thermal performance of buildings — Transmission and
ventilation heat transfer coefficients — Calculation method
1 Scope
This document specifies a method and provides conventions for the calculation of the steady-state
transmission and ventilation heat transfer coefficients of whole buildings and parts of buildings. It is
applicable both to heat loss (internal temperature higher than external temperature) and to heat gain
(internal temperature lower than external temperature). For the purpose of this document, the heated
or cooled space is assumed to be at uniform temperature.
Annex C provides a steady-state method to calculate the temperature in unconditioned spaces adjacent
to conditioned spaces.
NOTE Table 1 in the Introduction shows the relative position of this document within the set of EPB standards
in the context of the modular structure as set out in ISO 52000-1.
2 Normative references
The following documents are referred to in text in such a way that some or all of their content
constitutes re
...
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