Energy performance of buildings — Contribution of building automation, controls and building management — Part 1: General framework and procedures

This document specifies: — a structured list of control, building automation and technical building management functions which contribute to the energy performance of buildings; functions have been categorized and structured according to building disciplines and building automation and control (BAC); — a method to define minimum requirements or any specification regarding the control, building automation and technical building management functions contributing to energy efficiency of a building to be implemented in building of different complexities; — a factor-based method to get a first estimation of the effect of these functions on typical buildings types and use profiles; — detailed methods to assess the effect of these functions on a given building.

Performance énergétique des bâtiments — Contribution de l’automatisation, de la régulation et de la gestion technique des bâtiments — Partie 1: Cadre général et procédures

Ce document spécifie: — une liste structurée des fonctions de régulation, d’automatisation et de gestion technique du bâtiment qui contribuent à la performance énergétique des bâtiments; les fonctions ont été classées en catégories et structurées conformément aux disciplines du bâtiment et de ce qui s’appelle l’automatisation et la régulation du bâtiment (BAC, building automation and control); — une méthode pour définir les exigences minimales ou toute spécification concernant les fonctions de régulation, d’automatisation et de gestion technique du bâtiment à mettre en œuvre dans des bâtiments de différentes complexités et contribuant à leur efficacité énergétique; — une méthode basée sur des facteurs pour obtenir une première estimation de l’effet de ces fonctions sur les types de bâtiments et les profils d’utilisation courants; — des méthodes détaillées pour estimer l’effet de ces fonctions sur un bâtiment donné.

General Information

Status
Published
Publication Date
15-Dec-2021
Current Stage
6060 - International Standard published
Start Date
16-Dec-2021
Due Date
05-Feb-2021
Completion Date
16-Dec-2021
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INTERNATIONAL ISO
STANDARD 52120-1
First edition
2021-12
Corrected version
2022-09
Energy performance of buildings —
Contribution of building automation,
controls and building management —
Part 1:
General framework and procedures
Performance énergétique des bâtiments — Contribution de
l’automatisation, de la régulation et de la gestion technique des
bâtiments —
Partie 1: Cadre général et procédures
Reference number
ISO 52120-1:2021(E)
© ISO 2021

---------------------- Page: 1 ----------------------
ISO 52120-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2021 – All rights reserved

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ISO 52120-1:2021(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, subscripts and abbreviated terms . 5
4.1 Symbols . 5
4.2 Subscripts . . 5
4.3 Abbreviated terms . 5
5 Description of the method . 6
5.1 Output of the method . . 6
5.2 General description of the method(s) . 6
5.3 Selection criteria between the methods . 6
5.4 BAC and TBM functions having an impact on the energy performance of buildings . 7
5.5 BAC efficiency class . 21
5.6 BAC and TBM functions assigned to the BAC efficiency classes .22
5.7 Applying BAC for EnMS and maintaining BAC energy efficiency . 32
5.7.1 General . 32
5.7.2 Applying BAC for EnMS . 32
5.7.3 Maintaining BAC energy efficiency . 32
6 Method 1 - Detailed calculation procedure of the BAC contribution to the energy
performance of buildings (detailed method) .33
6.1 Output data . 33
6.2 Calculation time intervals .34
6.3 Input data - Source of data .35
6.4 Calculation procedure . . 35
6.4.1 Applicable calculation time interval . 35
6.4.2 Energy performance calculation . 35
7 Method 2 - Factor based calculation procedure of the BAC impact on the energy
performance of buildings (BAC factor method) .38
7.1 Output data .38
7.2 Calculation time interval .38
7.3 Calculation procedure — Energy calculation .39
7.3.1 General .39
7.3.2 BAC efficiency factor values .40
7.3.3 Application of the BAC efficiency factors . 41
8 Simplified input data correlations . .42
9 Quality control .42
10 C ompl i a nc e c he c k .42
Annex A (informative) BAC efficiency factors .43
Annex B (normative) Minimum BAC function type requirements .48
Annex C (informative) Determination of the BAC efficiency factors .52
Annex D (informative) Examples of how to use the BAC function list of ISO 16484-3 to
describe functions from this document .70
Annex E (informative) Applying BAC for EnMS specified in ISO 50001:2018 .73
Annex F (informative) Maintain BAC energy efficiency .87
Annex G (informative) Control accuracy .90
iii
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ISO 52120-1:2021(E)
Bibliography .91
iv
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ISO 52120-1:2021(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 205, Building environment design, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 247, Building Automation, Controls and Building Management, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 52120 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
This corrected version of ISO 52120-1:2021 incorporates the following corrections:
— Figure C.12 has been replaced.
v
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ISO 52120-1:2021(E)
Introduction
This document belongs to the family of standards aimed at international harmonization of the
methodology for the assessment of the energy performance of buildings. Throughout, this group of
standards is referred to as a set of called “EPB set of standards”.
All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency.
This document is clearly identified in the modular structure developed to ensure a transparent and
coherent set of EPB standards, as set out in ISO 52000-1, the overarching EPB standard. BAC (building
automation and control) is identified in the modular structure as technical building system M10.
However, other International Standards issued by ISO TC 205 deal with control accuracy, control
functions and control strategies using standards communications protocol (these last standards do not
belong to the set of EPB standards).
To avoid a duplication of calculation due to the BAC (avoid double impact), no calculation is done in a
BAC EPB standard set, but in each underlying standard of the set of EPB standards (from M1 to M9 in
the modular structure), an identifier developed and present in the M10 covered by this document is
used where appropriate. This way of interaction is described in detail in ISO/TR 52000-2, the Technical
Report accompanying ISO 52000-1. As consequence, the concept of a normative template for specific
(national) choices in Annex A, and Annex B with informative default choices, as commonly used in the
set of EPB standards is not applicable for this document.
The main target groups of this document are all the users of the set of EPB set of standards (e.g.
architects, engineers, regulators).
Further target groups are parties wanting to motivate their assumptions by classifying the building
energy performance for a dedicated building stock.
[5]
More information is provided in the Technical Report accompanying this document (ISO/TR 52120-2 ).
NOTE 1 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 can cover more than one module
and one module can be covered by more than one EPB standard, for instance a simplified and a detailed method
respectively. See also Clause 2 and Tables A.1 and B.1.
Table 1 — Position of this document (in casu M10–4,5,6,7,8,9,10), within the modular structure
of the set of EPB standards
Over-arching Building Technical building system
(as such)
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
a
The shaded modules are not applicable.
vi
  © ISO 2021 – All rights reserved

Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic hot
waters
Lighting
Building automa-
tion and control
PV, wind, etc.

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ISO 52120-1:2021(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Over-arching Building Technical building system
(as such)
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Common
terms and
definitions; Building ener-
2 Needs
symbols, gy needs
units and
subscripts
(Free) indoor
Maximum
conditions
3 Application load and
without sys-
power
tems
Ways to ex- Ways to ex- Ways to ex-
4 press energy press energy press energy    x
performance performance performance
Building
Heat transfer
functions Emission and
5 by transmis-    x
and building control
sion
boundaries
Building Heat transfer
occupancy by infiltration Distribution
6    x
and operating and ventila- and control
conditions tion
Aggregation
of energy
Internal heat Storage and
7 services and    x
gains control
energy car-
riers
Building par- Solar heat Generation
8    x
titioning gains and control
Load dis-
Calculated Building dy-
patching and
9 energy per- namics (ther-    x
operating
formance mal mass)
conditions
Measured Measured Measured
10 energy per- energy perfor- energy per-    x
formance mance formance
11 Inspection Inspection Inspection
Ways to ex-
12 press indoor BMS
comfort
External
13 environment
conditions
Economic
a
14
calculation
a
The shaded modules are not applicable.
vii
© ISO 2021 – All rights reserved
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic hot
waters
Lighting
Building automa-
tion and control
PV, wind, etc.

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INTERNATIONAL STANDARD ISO 52120-1:2021(E)
Energy performance of buildings — Contribution of
building automation, controls and building management —
Part 1:
General framework and procedures
1 Scope
This document specifies:
— a structured list of control, building automation and technical building management functions which
contribute to the energy performance of buildings; functions have been categorized and structured
according to building disciplines and building automation and control (BAC);
— a method to define minimum requirements or any specification regarding the control, building
automation and technical building management functions contributing to energy efficiency of a
building to be implemented in building of different complexities;
— a factor-based method to get a first estimation of the effect of these functions on typical buildings
types and use profiles;
— detailed methods to assess the effect of these functions on a given building.
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.
ISO 50001:2018, Energy management systems — Requirements with guidance for use
ISO 52000-1:2017, Energy performance of buildings — Overarching EPB assessment — Part 1: General
framework and procedures
ISO 7345:2018, Thermal performance of buildings and building components — Physical quantities and
definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7345:2018, ISO 52000-1:2017
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
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ISO 52120-1:2021(E)
3.1
auxiliary energy
electrical energy used by technical building systems (3.14) to support energy transformation to satisfy
energy needs
Note 1 to entry: This includes energy for fans, pumps, electronics, etc. Electrical energy input to the ventilation
system for air transport and heat recovery is not considered as auxiliary energy, but as energy used for
ventilation.
Note 2 to entry: In ISO 9488 the energy used for pumps and valves is called “parasitic energy”.
[SOURCE: ISO 13612-2:2014, 3.3, modified — Note 3 to entry was removed.]
3.2
building automation and control
BAC
products, software, and engineering services for automatic controls, monitoring and optimization,
human intervention and management to achieve energy-efficient, economical, and safe operation of
building services equipment
[SOURCE: ISO 52000-1:2017, 3.4.4, modified — The term BAC was added.]
3.3
building automation and control system
BACS
system, comprising all products, software and engineering services for automatic controls (including
interlocks), monitoring, optimization, for operation, human intervention, and management to achieve
energy-efficient, economical, and safe operation of building services
Note 1 to entry: BACS is also referred to as BMS (building management system).
Note 2 to entry: The use of the word ‘control’ does not imply that the system or device is restricted to control
functions (3.5). Processing of data and information is possible.
Note 3 to entry: If a building control system, building management (3.4) system, or building energy management
system complies with the requirements of the ISO 16484 series, it should be designated as a building automation
and control system (BACS).
Note 4 to entry: Building services are divided in technical, infrastructural and financial building services and
energy management is part of technical building management (3.13).
Note 5 to entry: Building energy management system is part of a BMS.
Note 6 to entry: The building energy management system comprises data collection, logging, alarming,
reporting, and analysis of energy usage, etc. The system is designed to reduce the energy consumption, improve
the utilization, increase the reliability, and predict the performance of the technical building systems (3.14), as
well as optimize energy usage and reducing its cost.
[SOURCE: ISO 16484-2:2004, 3.31, modified — Notes to entry 1, 4, 5 and 6 have been added.]
3.4
building management
BM
totality of services involved in the management operation and monitoring of buildings (including plants
and installations)
Note 1 to entry: Building management can be assigned as part of facility management.
[SOURCE: CEN/TS 15379:2009, 3.4, modified – Second part of the definition became Note 1 to entry.]
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ISO 52120-1:2021(E)
3.5
control function
BAC (3.2) effect of programs and parameters
Note 1 to entry: BAC functions are referred to as control functions, I/O, processing, optimization, management
and operator functions. They are listed in the BAC FL (function list) for a specification of work.
Note 2 to entry: Function is a program unit that delivers exactly one data element, which can be a multiple value
(i.e. an array or a structure). Functions can be an operand in a program as described in EN 61131–3.
3.6
delivered energy
energy, expressed per energy carrier (3.7), supplied to the technical building systems (3.14) through the
assessment boundary, to satisfy the uses taken into account or to produce the exported energy
Note 1 to entry: Delivered energy can be calculated for defined energy uses or it can be measured.
[SOURCE: ISO 52000-1:2017, 3.4.6]
3.7
energy carrier
substance or phenomenon that can be used to produce mechanical work or heat or to operate chemical
or physical processes
[SOURCE: ISO 52000-1:2017, 3.4.9]
3.8
energy need for heating and cooling
heat to be delivered to or extracted from a thermally conditioned space to maintain the intended space
temperature conditions during a given period of time
Note 1 to entry: The energy need can include additional heat transfer resulting from non-uniform temperature
distribution and non-ideal temperature control, if they are taken into account by increasing (decreasing) the
effective temperature for heating (cooling) and not included in the heat transfer due to the heating (cooling)
system.
[SOURCE: ISO 52000-1:2017, 3.4.13, modified — Note 1 to entry added and the term was originally
"energy need for heating or cooling".]
3.9
energy efficiency
ratio or other quantitative relationship between an output of performance, service, goods or energy,
and an input of energy
EXAMPLE Efficiency conversion; energy required/energy used; output/input; theoretical energy used to
operate/energy used to operate.
Note 1 to entry: Both input and output need to be clearly specified in quantity and quality, and be measurable.
[SOURCE: ISO 50001:2018, 3.5.3, modified — "commodities" was removed from the definition and the
example has been modified.]
3.10
integrated function
BAC (3.2) effect of programs, shared data points and parameters for multi-discipline interrelationships
between various building services and technologies
3
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ISO 52120-1:2021(E)
3.11
measured energy performance
energy performance based on measured amounts of delivered and exported energy
Note 1 to entry: The measured rating is the weighted sum of all energy carriers (3.7) used by the building, as
measured by meters or derived from measured energy by other means. It is a measure of the in-use performance
of the building after correction or extrapolation. This is particularly relevant to certification of actual energy
performance.
Note 2 to entry: Also known as “operational rating”.
[SOURCE: ISO 52000-1:2017, 3.5.16, modified — "weighted measured amounts" has been replaced by
"measured amounts" in the definition and "energy performance" has been replaced by "rating".]
3.12
thermally activated building system
TABS
massive building fabric actively heated or cooled by integrated air- or water-based systems
3.13
technical building management
TBM
process(es) and services related to operation and management of buildings and technical building system
(3.14) through the interrelationships between the different disciplines and trades
Note 1 to entry: The disciplines and trades comprise all technical building services for the purpose of optimized
maintenance and energy consumption.
EXAMPLE Optimization of buildings through interrelationships ranging from heating, ventilation and air
conditioning (HVAC), to lighting and day lighting, to life safety and security, to electric power systems and energy
monitoring and metering, to services, including communications and maintenance and to management.
[SOURCE: ISO 52127-1:2021, 3.2]
3.14
technical building system
technical equipment for heating, cooling, ventilation, humidification, dehumidification, domestic hot
water, lighting and electricity production
Note 1 to entry: A technical building system can refer to one or to several building services (e.g. heating, heating
and DHW).
Note 2 to entry: A technical building system is composed of different subsystems.
Note 3 to entry: Electricity production can include cogeneration and photovoltaic systems.
[SOURCE: ISO 52000-1:2017, 3.3.13, modified — The phrase "building automation and control" was
deleted from the definition.]
3.15
EPB standard
standard that complies with the requirements given in ISO 52000-1, CEN/TS 16628 and CEN/TS 16629
Note 1 to entry: These three basic EPB documents were developed under a mandate given to CEN by the European
Commission and the European Free Trade Association (Mandate M/480), and support essential requirements of
EU Directive 2010/31/EC on the energy performance of buildings (EPBD). Several EPB standards and related
[5] [6]
documents are developed or revised under the same mandate. CEN/TS 16628 and CEN/TS 16629 are
available as N-documents in ISO/TC 163 and ISO/TC 205.
[SOURCE: ISO 52000-1:2017, 3.5.14, modified — The last sentence of the Note 1 to entry has been added.]
4
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ISO 52120-1:2021(E)
4 Symbols, subscripts and abbreviated terms
4.1 Symbols
For the purposes of this document, the symbols given in ISO 52000-1 and Table 2 apply.
Table 2 — Symbols
Symbol Quantity Unit
a normalized level, e.g. occupancy or gains -
mean part load -
β
Φ heat flow rate, thermal power kW
4.2 Subscripts
For the purposes of this document, the subscript given in ISO 52000-1:2017, Clause 4 and Annex C and
the specific subscripts listed in Table 3 apply.
NOTE Relevant subscripts already given in ISO 52000-1 are included if necessary for the understanding of
this document.
Table 3 — Subscripts
Subscript Term Subscript Term Subscript Term
amb ambient end end th thermal
BAC building automation r room trans transfer
and control
cor correction ref reference
ctr control set setpoint
DHW domestic hot water sta start
4.3 Abbreviated terms
For the purposes of this document, the abbreviated terms given in ISO 52000-1 and Table 4 apply.
Table 4 — Abbreviated terms
AHU air handling unit
BAC building automation and control
BM building management
COP coefficient of performance
DHW domestic hot water
HVAC heating, ventilation and air conditioning
TABS thermally activated building systems
TBM technical building management
VFD variable flow dependant
VRF variable room flow
5
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ISO 52120-1:2021(E)
5 Description of the method
5.1 Output of the method
This document describes two methods of how to calculate the contribution of building automation and
controls to the energy performance of buildings. The two methods are the following.
— The detailed method: output of the detailed method is a list of automation, control and management
function types that is used to run a detailed calculation of building energy performance based on
other EPB standards. In addition, the detailed method would also allow classification of a building
auto
...

NORME ISO
INTERNATIONALE 52120-1
Première édition
2021-12
Version corrigée
2022-09
Performance énergétique des
bâtiments — Contribution de
l’automatisation, de la régulation et de
la gestion technique des bâtiments —
Partie 1:
Cadre général et procédures
Energy performance of buildings — Contribution of building
automation, controls and building management —
Part 1: General framework and procedures
Numéro de référence
ISO 52120-1:2021(F)
© ISO 2021

---------------------- Page: 1 ----------------------
ISO 52120-1:2021(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
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ISO 52120-1:2021(F)
Sommaire Page
Avant-propos .v
Introduction . vi
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Symboles, indices et termes abrégés . 5
4.1 Symboles . 5
4.2 Indices . 5
4.3 Termes abrégés . 5
5 Description des méthodes . 6
5.1 Résultats . 6
5.2 Description générale des méthodes . 6
5.3 Critères de sélection entre les méthodes . 6
5.4 Fonctions BAC et GTB ayant un impact sur la performance énergétique des
bâtiments . 7
5.5 Classe d’efficacité de BAC . 25
5.6 Fonctions BAC et GTB affectées aux classes d’efficacité de BAC . 25
5.7 Application des fonctions BAC à un SMÉ et maintien de l’efficacité énergétique de
BAC . 37
5.7.1 Généralités . 37
5.7.2 Application des fonctions BAC à un SMÉ . 37
5.7.3 Maintien de l’efficacité énergétique de BAC .38
6 Méthode 1 - Mode opératoire de calcul détaillé de la contribution de l’automatisation
et de la régulation à la performance énergétique des bâtiments (Méthode détaillée) .38
6.1 Données de sortie . .38
6.2 Intervalles de temps de calcul .40
6.3 Données d’entrée - Origine des données .40
6.4 Mode opératoire de calcul .40
6.4.1 Intervalle de temps applicable .40
6.4.2 Calcul de la performance énergétique . 41
7 Méthode 2 - Mode opératoire de calcul basé sur des facteurs de l’impact de
l’automatisation et de la régulation sur la performance énergétique des bâtiments
(méthode basée sur les facteurs BAC) .43
7.1 Données de sortie . . 43
7.2 Intervalles de temps de calcul .44
7.3 Mode opératoire de calcul - Calcul de l’énergie . 45
7.3.1 General . 45
8 Corrélations simplifiées des données d’entrée .49
9 Contrôle qualité .49
10 Vérification de conformité .49
Annexe A (informative) Facteurs d’efficacité de BAC .50
Annexe B (normative) Exigences minimales des types de fonctions BAC .55
Annexe C (informative) Détermination des facteurs d’efficacité de BAC .60
Annexe D (informative) Exemples d’utilisation de la liste de fonctions BAC de l’ISO 16484-3
pour décrire les fonctions du présent document .78
Annexe E (informative) Application de l’automatisation et de la régulation des bâtiments
(BAC) pour le système de management de l’énergie (SMÉ) spécifié dans l’ISO 50001:
2018 .81
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ISO 52120-1:2021(F)
Annexe F (informative) Maintien de l’efficacité énergétique de BAC .97
Annexe G (informative) Précision de la régulation. 100
Bibliographie . 101
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ISO 52120-1:2021(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été préparé par le comité technique ISO/TC 205, Conception de l’environnement
intérieur des bâtiments, en collaboration avec le comité technique CEN/TC 247, Automatisation,
régulation et gestion technique du bâtiment, du Comité européen de normalisation (CEN) conformément
à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Une liste de toutes les parties de la série ISO 52120 est disponible sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
La présente version corrigée de l'ISO I52120-1:2021 inclut les corrections suivantes :
— traduction de l’acronyme PEB (Performance Energétique des Bâtiments) à travers tout le texte;
— réédition du Tableau 5 pour supprimer la redondance des en-têtes incluant la fonction 1.1 et sa
description;
— mise à jour de la classification du niveau 1 de la fonction 1.10;
— référence à l’Annexe B normative;
— référence au Tableau C.8;
— divers changements rédactionnels pour aligner le texte avec la version anglaise.
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ISO 52120-1:2021(F)
Introduction
Ce document appartient à la famille de normes visant à l’harmonisation internationale de la
méthodologie d’évaluation de la performance énergétique des bâtiments. Tout au long de ce doucment,
cette famille est appelée «ensemble de normes PEB».
Toutes les normes PEB suivent des règles spécifiques pour assurer la cohérence globale, l’absence
d’ambiguïté et la transparence. Ce document est clairement identifié dans la structure modulaire
développée pour assurer un ensemble transparent et cohérent de normes PEB, comme indiqué dans
ISO 52000-1, la norme PEB globale. L’automatisation et la régulation du bâtiment (BAC, building
automation and control) sont identifiées dans la structure modulaire sous le système technique du
bâtiment M10. Cependant, d’autres normes de l’ISO/TC 205 traitent de la précision, des fonctions et
des stratégies de régulation en utilisant des protocoles de communication normalisés (ces dernières
normes ne font pas partie de l’ensemble de normes PEB).
Pour éviter une redondance de calcul due au BAC (double impact), aucun calcul n’est effectué dans
l’ensemble de normes PEB, mais dans chaque norme sous-jacente de l’ensemble de normes PEB (de M1
à M9 dans la structure modulaire), un identifiant développé et présent dans le module M10 couvert par
ce document est utilisé aux endroits appropriés. Ce moyen d’interaction est détaillé dans le Rapport
technique ISO/TR 52000-2 annexé à la norme-cadre. En conséquence, le concept de modèle normatif
pour des choix spécifiques (nationaux) à l’Annexe A et à l’Annexe B avec des choix informatifs par défaut,
tels qu’ils sont couramment utilisés dans l’ensemble des normes PEB, n’est pas applicable au présent
document.
Les principaux groupes cibles de la présente norme sont tous les utilisateurs de l’ensemble des normes
PEB (par exemple architectes, ingénieurs, législateurs).
D’autres groupes cibles sont les acteurs qui désirent justifier leurs propositions en caractérisant la
performance énergétique d’un ensemble de bâtiments spécifiques.
[5]
Le Rapport technique qui accompagne la présente norme (projet ISO/TR 52120-2 ) fournit des
informations complémentaires.
NOTE 1 Le Tableau 1 montre la position relative du présent document dans l’ensemble des normes PEB dans
le contexte de la structure modulaire telle qu’elle est définie dans l’ISO 52000-1.
NOTE 2 Dans l’ISO/TR 52000-2, on trouve le même tableau, avec, pour chaque module, les numéros des
normes PEB pertinentes et les rapports techniques qui les accompagnent qui sont publiés ou en préparation.
NOTE 3 Les modules représentent des normes PEB, bien qu’une norme PEB puisse couvrir plus d’un module et
qu’un module puisse être couvert par plus d’une norme PEB, par exemple une méthode simplifiée et une méthode
détaillée respectivement. Voir aussi l’Article 2 et les Tableaux A.1 et B.1.
Tableau 1 — Position de la présente norme (en l’occurrence M10–4,5,6,7,8,9,10) dans la
structure modulaire de l’ensemble de normes PEB
Cadre Bâtiment Système technique du bâtiment
(en tant que
tel)
sous1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 Généralités Généralités Généralités
a Les modules grisés ne sont pas applicables.
vi
  © ISO 2021 – Tous droits réservés

Sous-module
Descriptions
Descriptions
Descriptions
Chauffage
Refroidisse-
ment
Ventilation
Humidification
Déshumidifica-
tion
Eau chaude
sanitaire
Éclairage
Automatisation
et régulation
Énergie PV,
éolienne.

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ISO 52120-1:2021(F)
TTabableleaauu 1 1 ((ssuuiitte)e)
Cadre Bâtiment Système technique du bâtiment
(en tant que
tel)
sous1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Termes et
définitions,
Besoins éner-
symboles,
2 gétiques du Besoins
unités et
bâtiment
indices com-
muns
Conditions
Charge et
intérieures
3 Applications puissance
(libres) sans
maximales
systèmes
Manières Manières Manières
d’exprimer la d’exprimer la d’exprimer la
4    x
performance performance performance
énergétique énergétique énergétique
Fonctions
Transfert
du bâtiment Émission et
5 thermique par    x
et limites du régulation
transmission
bâtiment
Occupation
Transfert
du bâtiment
thermique par Distribution
6 et conditions    x
infiltration et et régulation
de fonction-
ventilation
nement
Agrégation
de services Apports
Stockage et
7 énergétiques de chaleur    x
régulation
et vecteurs internes
énergétiques
Systèmes de
Zonage du Apports génération de
8    x
bâtiment solaires chauffage des
locaux
Répartition
Dynamique
Performance de la charge
du bâtiment
9 énergétique et conditions    x
(masse ther-
calculée de fonction-
mique)
nement
Performance Performance Performance
10 énergétique énergétique énergétique    x
mesurée mesurée mesurée
11 Inspection Inspection Inspection
a Les modules grisés ne sont pas applicables.
vii
© ISO 2021 – Tous droits réservés
Sous-module
Descriptions
Descriptions
Descriptions
Chauffage
Refroidisse-
ment
Ventilation
Humidification
Déshumidifica-
tion
Eau chaude
sanitaire
Éclairage
Automatisation
et régulation
Énergie PV,
éolienne.

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ISO 52120-1:2021(F)
TTabableleaauu 1 1 ((ssuuiitte)e)
Cadre Bâtiment Système technique du bâtiment
(en tant que
tel)
sous1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Systèmes
Manières
de gestion
d’exprimer
12 technique
le confort
du bâtiment
intérieur
(GTB)
Conditions
de l’envi-
13
ronnement
extérieur
Calculs éco-
14a
nomiques
a Les modules grisés ne sont pas applicables.
viii
  © ISO 2021 – Tous droits réservés

Sous-module
Descriptions
Descriptions
Descriptions
Chauffage
Refroidisse-
ment
Ventilation
Humidification
Déshumidifica-
tion
Eau chaude
sanitaire
Éclairage
Automatisation
et régulation
Énergie PV,
éolienne.

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NORME INTERNATIONALE ISO 52120-1:2021(F)
Performance énergétique des bâtiments — Contribution
de l’automatisation, de la régulation et de la gestion
technique des bâtiments —
Partie 1:
Cadre général et procédures
1 Domaine d’application
Ce document spécifie:
— une liste structurée des fonctions de régulation, d’automatisation et de gestion technique du
bâtiment qui contribuent à la performance énergétique des bâtiments; les fonctions ont été classées
en catégories et structurées conformément aux disciplines du bâtiment et de ce qui s’appelle
l’automatisation et la régulation du bâtiment (BAC, building automation and control);
— une méthode pour définir les exigences minimales ou toute spécification concernant les fonctions
de régulation, d’automatisation et de gestion technique du bâtiment à mettre en œuvre dans des
bâtiments de différentes complexités et contribuant à leur efficacité énergétique;
— une méthode basée sur des facteurs pour obtenir une première estimation de l’effet de ces fonctions
sur les types de bâtiments et les profils d’utilisation courants;
— des méthodes détaillées pour estimer l’effet de ces fonctions sur un bâtiment donné.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 50001:2018, Systèmes de management de l'énergie — Exigences et recommandations pour la mise en
oeuvre
ISO 52000-1:2017, Performance énergétique des bâtiments — Évaluation cadre PEB — Partie 1: Cadre
général et modes opératoires
ISO 7345:2018, Performance thermique des bâtiments et des matériaux pour le bâtiment — Grandeurs
physiques et définitions
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l’ISO 7345:2018, l'ISO 52000-1:2017
ainsi que les suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/
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ISO 52120-1:2021(F)
3.1
énergie des auxiliaires
énergie électrique utilisée par les systèmes techniques du bâtiment (3.14) pour permettre la
transformation de l’énergie et satisfaire les besoins énergétiques
Note 1 à l'article: Elle inclut l’énergie des ventilateurs, des pompes, de l’électronique, etc. L’énergie électrique
entrant dans un système de ventilation pour le transport de l’air et la récupération de chaleur n’est pas considérée
comme de l’énergie des auxiliaires, mais comme une utilisation d’énergie pour la ventilation.
Note 2 à l'article: Dans l’ISO 9488, l’énergie utilisée pour les pompes et les vannes est appelée «énergie auxiliaire».
[SOURCE: ISO 13612-2:2014, 3.3, modifiée — La Note 3 à l'article a été supprimée.]
3.2
automatisation et régulation du bâtiment
BAC (Building Automation and Control)
produits, logiciels et services d’ingénierie nécessaires à la régulation automatique, à la supervision et à
l’optimisation, à l’intervention et à la gestion humaines en vue de l’exploitation économique et sûre des
équipements techniques du bâtiment, pour obtenir une efficacité énergétique optimale
[SOURCE: ISO 52000-1:2017, 3.4.4, modifiée — L’abréviation BAC a été ajoutée.]
3.3
système d’automatisation et de régulation du bâtiment
BACS (Building Automation and Control System)
système composé de tous les produits, logiciels et services d’ingénierie nécessaires à la régulation
automatique (y compris les asservissements), à la supervision et à l’optimisation, au fonctionnement,
à l’intervention et à la gestion humaine en vue de l’exploitation économique et sûre des équipements
techniques du bâtiment, avec un rendement énergétique optimal
Note 1 à l'article: En anglais, BACS (Building Automation and Control System) s’applique aussi à BMS (Building
Management System).
Note 2 à l'article: L’utilisation du terme «régulation» n’implique pas que le système/l’appareil est limité aux
fonctions de régulation (3.5). Il peut avoir la capacité de traiter des données et informations.
Note 3 à l'article: Lorsqu’un système de régulation du bâtiment, un système de gestion (3.4) du bâtiment ou un
système de maîtrise de l’énergie du bâtiment est conforme aux exigences de la série ISO 16484, il convient de le
désigner «système d’automatisation et de régulation du bâtiment» (BACS).
Note 4 à l'article: Les services du bâtiment sont divisés en services techniques, de gestion des infrastructures
et de gestion financière du bâtiment; la gestion de l’énergie fait partie de la gestion technique du bâtiment (3.13).
Note 5 à l'article: Le système de maîtrise de l’énergie du bâtiment fait partie d’un système de gestion du bâtiment.
Note 6 à l'article: Le système de gestion de l’énergie du bâtiment comprend la collecte de données, l’encodage,
l’activation d’alarmes, le suivi et l’analyse de l’énergie utilisée, etc. Le système est conçu de manière à réduire
la consommation d’énergie, à améliorer son utilisation, à augmenter la fiabilité et à prévoir la performance des
systèmes techniques du bâtiment (3.14), ainsi qu’à optimiser l’utilisation de l’énergie et à réduire son coût.
[SOURCE: ISO 16484-2:2004, 3.31, modifiée — Les Notes 1, 4 et 5 à l’article ont été ajoutées.]
3.4
gestion du bâtiment
BM(Building Management)
ensemble des services dédiés aux opérations de gestion et de surveillance du bâtiment (incluant les
matériels et les installations)
Note 1 à l'article: La gestion du bâtiment peut être considérée comme une partie de la gestion des installations.
[SOURCE: CEN/TS 15379:2009, 3.4, modifiée — La seconde partie de la définition est devenue à la Note
1 à l’article.]
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ISO 52120-1:2021(F)
3.5
fonction de régulation
actions des programmes et paramètres d’automatisation et de régulation du bâtiment (BAC) (3.2)
Note 1 à l'article: Les fonctions d’automatisation et de régulation du bâtiment sont souvent désignées sous le
terme de fonctions de régulation, d’entrée/sortie, de traitement, d’optimisation, de gestion et de fonctions
opérateur. Elles sont énumérées dans la liste des fonctions d’automatisation et de régulation du bâtiment, établie
dans le cadre d’une spécification de travaux.
Note 2 à l'article: Une fonction est un sous-ensemble de programmes produisant en sortie exactement un élément
de données, qui peut être un ensemble de données (c’est-à-dire un tableau ou une structure). Les fonctions
peuvent être un opérande dans un programme comme décrit dans l’EN 61131–3.
3.6
énergie reçue de l’extérieur
énergie, exprimée par vecteur énergétique (3.7), fournie aux systèmes techniques du bâtiment (3.14) à
travers la limite de l’évaluation, afin de répondre aux services pris en compte ou de produire l’électricité
fournie à l’extérieur
Note 1 à l'article: L’énergie reçue de l’extérieur peut être soit calculée pour des utilisations définies, soit mesurée.
[SOURCE: ISO 52000-1:2017, 3.4.6]
3.7
vecteur énergétique
substance ou phénomène qui peut servir à produire du travail mécanique ou de la chaleur, ou à la
réalisation de processus chimiques ou physiques
[SOURCE: ISO 52000-1:2017, 3.4.9]
3.8
besoin d’énergie pour le chauffage ou le refroidissement
chaleur à fournir ou à extraire d’un espace climatisé pour maintenir les conditions de température
voulues dans cet espace pendant une durée donnée
Note 1 à l'article: Le besoin d’énergie peut inclure un transfert thermique supplémentaire résultant d’une
répartition non uniforme et d’une régulation non idéale de la température, si elles sont prises en compte par
l’augmentation (diminution) de la température effective pour le chauffage (refroidissement) et non incluses dans
le transfert thermique dû au système de chauffage (refroidissement).
[SOURCE: ISO 52000-1:2017, 3.4.13, modifié — Ajout de la Note 1 à l’article et le terme était à l’origine
«besoin énergétique pour le chauffage ou le refroidissement».]
3.9
efficacité énergétique
ratio, ou autre relation quantitative, entre une performance, un service, un bien ou une énergie produits
et un apport en énergie
EXEMPLE L’efficacité de conversion, le rapport «énergie nécessaire/énergie utilisée», le rapport «sortie/
entrée», le rapport «énergie théoriquement utilisée pour fonctionner/énergie effectivement utilisée pour
fonctionner».
Note 1 à l'article: L’entrée comme la sortie, censées être mesurables, seront clairement précisées en termes de
quantité et de qualité.
[SOURCE: ISO 50001:2018, 3.5.3, modifié —- les «marchandises» a été retirée de la définition et
l'exemple a été modifié.]
3.10
fonction intégrée
actions de programmes, valeurs de mesure partagées et paramètres d’automatisation et de régulation du
bâtiment (BAC) (3.2) permettant d’établir des relations réciproques pluridisciplinaires entre différents
services et technologies du bâtiment
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ISO 52120-1:2021(F)
3.11
performance énergétique mesurée
classification énergétique basée sur les quantités mesurées d’énergie reçue de l’extérieur et fournie à
l’extérieur
Note 1 à l'article: La classification mesurée est la somme pondérée de tous les vecteurs énergétiques (3.7) utilisés
par le bâtiment, mesurés par des compteurs ou dérivés d’une énergie mesurée par d’autres moyens. Il s’agit
d’une mesure de la performance en cours d’utilisation du bâtiment après correction et extrapolation. Elle est
particulièrement pertinente pour la certification de la performance énergétique réelle.
Note 2 à l'article: Aussi connue sous le nom de «classification opérationnelle».
[SOURCE: ISO 52000-1:2017, 3.5.16, modifié — «quantités mesurées pondérées» a été remplacé par
«quantités mesurées» dans l
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 52120-1
ISO/TC 205
Energy performance of buildings —
Secretariat: ANSI
Contribution of building automation
Voting begins on:
2021-09-07 and controls and building
management —
Voting terminates on:
2021-11-02
Part 1:
General framework and procedures
ISO/CEN PARALLEL PROCESSING
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 52120-1:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2021

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ISO/FDIS 52120-1:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2021 – All rights reserved

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ISO/FDIS 52120-1:2021(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, subscripts and abbreviated terms . 5
4.1 Symbols . 5
4.2 Subscripts . 5
4.3 Abbreviated terms . 5
5 Description of the method . 6
5.1 Output of the method . 6
5.2 General description of the method(s) . 6
5.3 Selection criteria between the methods . 6
5.4 BAC and TBM functions having an impact on the energy performance of buildings . 7
5.5 BAC efficiency class .21
5.6 BAC and TBM functions assigned to the BAC efficiency classes .22
5.7 Applying BAC for EnMS and maintaining BAC energy efficiency .32
5.7.1 General.32
5.7.2 Applying BAC for EnMS .32
5.7.3 Maintaining BAC energy efficiency .32
6 Method 1 - Detailed calculation procedure of the BAC contribution to the energy
performance of buildings (detailed method) .33
6.1 Output data .33
6.2 Calculation time intervals .34
6.3 Input data - Source of data .35
6.4 Calculation procedure .35
6.4.1 Applicable calculation time interval .35
6.4.2 Energy performance calculation .35
7 Method 2 - Factor based calculation procedure of the BAC impact on the energy
performance of buildings (BAC factor method) .38
7.1 Output data .38
7.2 Calculation time interval .38
7.3 Calculation procedure — Energy calculation .39
7.3.1 General.39
7.3.2 BAC efficiency factor values .40
7.3.3 Application of the BAC efficiency factors .41
8 Simplified input data correlations .42
9 Quality control .42
10 Compliance check .42
Annex A (informative) BAC efficiency factors.43
Annex B (normative) Minimum BAC function type requirements .48
Annex C (informative) Determination of the BAC efficiency factors .52
Annex D (informative) Examples of how to use the BAC function list of ISO 16484-3 to
describe functions from this document .70
Annex E (informative) Applying BAC for EnMS specified in ISO 50001:2018 .73
Annex F (informative) Maintain BAC energy efficiency .87
Annex G (informative) Control accuracy .91
© ISO 2021 – All rights reserved iii

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ISO/FDIS 52120-1:2021(E)

Bibliography .92
iv © ISO 2021 – All rights reserved

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ISO/FDIS 52120-1:2021(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 of 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 www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 205, Building environment design, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 247, Building Automation, Controls and Building Management, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 52120 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2021 – All rights reserved v

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ISO/FDIS 52120-1:2021(E)

Introduction
This document belongs to the family of standards aimed at international harmonization of the
methodology for the assessment of the energy performance of buildings. Throughout, this group of
standards is referred to as a “set of, called “EPB set of standards”.
All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency.
This document is clearly identified in the modular structure developed to ensure a transparent and
coherent set of EPB standards, as set out in ISO 52000-1, the overarching EPB standard. BAC (building
automation and control) is identified in the modular structure as technical building system M10.
However, other International Standards issued by ISO TC 205 deal with control accuracy, control
functions and control strategies using standards communications protocol (these last standards do not
belong to the set of EPB standards).
To avoid a duplication of calculation due to the BAC (avoid double impact), no calculation is done in a
BAC EPB standard set, but in each underlying standard of the set of EPB standards (from M1 to M9 in
the modular structure), an identifier developed and present in the M10 covered by this document is
used where appropriate. This way of interaction is described in detail in ISO/TR 52000-2, the Technical
Report accompanying ISO 52000-1. As consequence, the concept of a normative template for specific
(national) choices in Annex A, and Annex B with informative default choices, as commonly used in the
set of EPB standards is not applicable for this document.
The main target groups of this document are all the users of the set of EPB set of standards (e.g.
architects, engineers, regulators).
Further target groups are parties wanting to motivate their assumptions by classifying the building
energy performance for a dedicated building stock.
[5]
More information is provided in the Technical Report accompanying this document (ISO/TR 52120-2 ).
NOTE 1 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 can cover more than one module
and one module can be covered by more than one EPB standard, for instance a simplified and a detailed method
respectively. See also Clause 2 and Tables A.1 and B.1.
Table 1 — Position of this document (in casu M10–4,5,6,7,8,9,10), within the modular structure
of the set of EPB standards
Over-arch- Building Technical building system
ing (as such)
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
a
The shaded modules are not applicable.
vi © ISO 2021 – All rights reserved
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic hot
waters
Lighting
Building automa-
tion and control
PV, wind, etc.

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ISO/FDIS 52120-1:2021(E)

Table 1 (continued)
Over-arch- Building Technical building system
ing (as such)
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Common
terms and
definitions; Building ener-
2 Needs
symbols, gy needs
units and
subscripts
(Free) indoor
Maximum
conditions
3 Application load and
without sys-
power
tems
Ways to ex- Ways to ex- Ways to ex-
4 press energy press energy press energy    x
performance performance performance
Building
Heat transfer
functions Emission and
5 by transmis-    x
and building control
sion
boundaries
Building Heat transfer
occupancy by infiltration Distribution
6    x
and operating and ventila- and control
conditions tion
Aggregation
of energy
Internal heat Storage and
7 services and    x
gains control
energy car-
riers
Building par- Solar heat Generation
8    x
titioning gains and control
Load dis-
Calculated Building dy-
patching and
9 energy per- namics (ther-    x
operating
formance mal mass)
conditions
Measured Measured Measured
10 energy per- energy perfor- energy per-    x
formance mance formance
11 Inspection Inspection Inspection
Ways to ex-
12 press indoor BMS
comfort
External
13 environment
conditions
Economic
a
14
calculation
a
The shaded modules are not applicable.
© ISO 2021 – All rights reserved vii
Submodule
Descriptions
Descriptions
Descriptions
Heating
Cooling
Ventilation
Humidification
Dehumidification
Domestic hot
waters
Lighting
Building automa-
tion and control
PV, wind, etc.

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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 52120-1:2021(E)
Energy performance of buildings — Contribution
of building automation and controls and building
management —
Part 1:
General framework and procedures
1 Scope
This document specifies:
— a structured list of control, building automation and technical building management functions which
contribute to the energy performance of buildings; functions have been categorized and structured
according to building disciplines and building automation and control (BAC);
— a method to define minimum requirements or any specification regarding the control, building
automation and technical building management functions contributing to energy efficiency of a
building to be implemented in building of different complexities;
— a factor-based method to get a first estimation of the effect of these functions on typical buildings
types and use profiles;
— detailed methods to assess the effect of these functions on a given building.
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.
ISO 50001:2018, Energy management systems — Requirements with guidance for use
ISO 52000-1:2017, Energy performance of buildings — Overarching EPB assessment — Part 1: General
framework and procedures
ISO 7345:2018, Thermal performance of buildings and building components — Physical quantities and
definitions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7345:2018, in ISO 52000-1:2017
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
© ISO 2021 – All rights reserved 1

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ISO/FDIS 52120-1:2021(E)

3.1
auxiliary energy
electrical energy used by technical building systems (3.14) to support energy transformation to satisfy
energy needs
Note 1 to entry: This includes energy for fans, pumps, electronics, etc. Electrical energy input to the ventilation
system for air transport and heat recovery is not considered as auxiliary energy, but as energy used for
ventilation.
Note 2 to entry: In ISO 9488 the energy used for pumps and valves is called “parasitic energy”.
[SOURCE: ISO 13612-2:2014, 3.3, modified — Note 3 to entry was removed.]
3.2
building automation and control
BAC
products, software, and engineering services for automatic controls, monitoring and optimization,
human intervention and management to achieve energy-efficient, economical, and safe operation of
building services equipment
[SOURCE: ISO 52000-1:2017, 3.4.4, modified – The term BAC was added.]
3.3
building automation and control system
BACS
system, comprising all products, software and engineering services for automatic controls (including
interlocks), monitoring, optimization, for operation, human intervention, and management to achieve
energy-efficient, economical, and safe operation of building services
Note 1 to entry: BACS is also referred to as BMS (building management system).
Note 2 to entry: The use of the word ‘control’ does not imply that the system or device is restricted to control
functions (3.5). Processing of data and information is possible.
Note 3 to entry: If a building control system, building management (3.4) system, or building energy management
system complies with the requirements of the ISO 16484 series, it should be designated as a building automation
and control system (BACS).
Note 4 to entry: Building services are divided in technical, infrastructural and financial building services and
energy management is part of technical building management (3.13).
Note 5 to entry: Building energy management system is part of a BMS.
Note 6 to entry: The building energy management system comprises data collection, logging, alarming,
reporting, and analysis of energy usage, etc. The system is designed to reduce the energy consumption, improve
the utilization, increase the reliability, and predict the performance of the technical building systems (3.14), as
well as optimize energy usage and reducing its cost.
[SOURCE: ISO 16484-2:2004, 3.31, modified – Notes to entry 1, 4, 5 and 6 have been added.]
3.4
building management
BM
totality of services involved in the management operation and monitoring of buildings (including plants
and installations)
Note 1 to entry: Building management can be assigned as part of facility management.
[SOURCE: CEN/TS 15379:2009, 3.4, modified – Second part of the definition became Note 1 to entry.]
2 © ISO 2021 – All rights reserved

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ISO/FDIS 52120-1:2021(E)

3.5
control function
BAC (3.2) effect of programs and parameters
Note 1 to entry: BAC functions are referred to as control functions, I/O, processing, optimization, management
and operator functions. They are listed in the BAC FL (function list) for a specification of work.
Note 2 to entry: Function is a program unit that delivers exactly one data element, which can be a multiple value
(i.e. an array or a structure). Functions can be an operand in a program as described in EN 61131–3.
3.6
delivered energy
energy, expressed per energy carrier (3.7), supplied to the technical building systems (3.14) through the
assessment boundary, to satisfy the uses taken into account or to produce the exported energy
Note 1 to entry: Delivered energy can be calculated for defined energy uses or it can be measured.
[SOURCE: ISO 52000-1:2017, 3.4.6]
3.7
energy carrier
substance or phenomenon that can be used to produce mechanical work or heat or to operate chemical
or physical processes
[SOURCE: ISO 52000-1:2017, 3.4.9]
3.8
energy need for heating and cooling
heat to be delivered to or extracted from a thermally conditioned space to maintain the intended space
temperature conditions during a given period of time
Note 1 to entry: The energy need can include additional heat transfer resulting from non-uniform temperature
distribution and non-ideal temperature control, if they are taken into account by increasing (decreasing) the
effective temperature for heating (cooling) and not included in the heat transfer due to the heating (cooling)
system.
[SOURCE: ISO 52000-1:2017, 3.4.13 — Note 1 to entry added and the term was originally "energy need
for heating or cooling".]
3.9
energy efficiency
ratio or other quantitative relationship between an output of performance, service, goods or energy,
and an input of energy
EXAMPLE Efficiency conversion; energy required/energy used; output/input; theoretical energy used to
operate/energy used to operate.
Note 1 to entry: Both input and output need to be clearly specified in quantity and quality, and be measurable.
[SOURCE: ISO 50001:2018, 3.5.3 modified—- "commodities" was removed from the definition and the
example has been modified.]
3.10
integrated function
BAC (3.2) effect of programs, shared data points and parameters for multi-discipline interrelationships
between various building services and technologies
© ISO 2021 – All rights reserved 3

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ISO/FDIS 52120-1:2021(E)

3.11
measured energy performance
energy performance based on measured amounts of delivered and exported energy
Note 1 to entry: The measured rating is the weighted sum of all energy carriers (3.7) used by the building, as
measured by meters or derived from measured energy by other means. It is a measure of the in-use performance
of the building after correction or extrapolation. This is particularly relevant to certification of actual energy
performance.
Note 2 to entry: Also known as “operational rating”.
[SOURCE: ISO 52000-1:2017, 3.5.16, modified — "weighted measured amounts" has been replaced by
"measured amounts" in the definition and "energy performance" has been replaced by "rating".]
3.12
thermally activated building system
TABS
massive building fabric actively heated or cooled by integrated air- or water-based systems
3.13
technical building management
TBM
process(es) and services related to operation and management of buildings and technical building system
(3.14) through the interrelationships between the different disciplines and trades
Note 1 to entry: The disciplines and trades comprise all technical building services for the purpose of optimized
maintenance and energy consumption.
EXAMPLE Optimization of buildings through interrelationships ranging from heating, ventilation and air
conditioning (HVAC), to lighting and day lighting, to life safety and security, to electric power systems and energy
monitoring and metering, to services, including communications and maintenance and to management.
[SOURCE: ISO 52127-1:2021, 3.2]
3.14
technical building system
technical equipment for heating, cooling, ventilation, humidification, dehumidification, domestic hot
water, lighting and electricity production
Note 1 to entry: A technical building system can refer to one or to several building services (e.g. heating, heating
and DHW).
Note 2 to entry: A technical building system is composed of different subsystems.
Note 3 to entry: Electricity production can include cogeneration and photovoltaic systems.
[SOURCE: ISO 52000-1:2017, 3.3.13, modified — The phrase "building automation and control" was
deleted from the definition.]
3.15
EPB standard
standard that complies with the requirements given in ISO 52000-1, CEN/TS 16628 and CEN/TS 16629
Note 1 to entry: These three basic EPB documents were developed under a mandate given to CEN by the European
Commission and the European Free Trade Association (Mandate M/480), and support essential requirements of
EU Directive 2010/31/EC on the energy performance of buildings (EPBD). Several EPB standards and related
[5] [6]
documents are developed or revised under the same mandate. CEN/TS 16628 and CEN/TS 16629 are
available as N-documents in ISO/TC 163 and ISO/TC 205.
[SOURCE: ISO 52000-1:2017, 3.5.14, modified — The last sentence of the Note 1 to entry has been added.]
4 © ISO 2021 – All rights reserved

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ISO/FDIS 52120-1:2021(E)

4 Symbols, subscripts and abbreviated terms
4.1 Symbols
For the purposes of this document, the symbols given in ISO 52000-1 and Table 2 apply.
Table 2 — Symbols
Symbol Quantity Unit
a normalized level, e.g. occupancy or gains -
mean part load -
β
Φ heat flow rate, thermal power kW
4.2 Subscripts
For the purposes of this document, the subscript given in ISO 52000-1:2017, Clause 4 and Annex C and
the specific subscripts listed in Table 3 apply.
NOTE Relevant subscripts already given in ISO 52000-1 are included if necessary for the understanding of
this document.
Table 3 — Subscripts
Subscript Term Subscript Term Subscript Term
amb ambient end end th thermal
BAC building automation r room trans transfer
and control
cor correction ref reference
ctr control set setpoint
DHW domestic hot water sta start
4.3 Abbreviated terms
For the purposes of this document, the abbreviated terms given in ISO 52000-1 and Table 4 apply.
Table 4 — Abbreviated terms
AHU air handling unit
BAC building automation and control
BM building management
COP coefficient of performance
DHW domestic hot water
HVAC heating, ventilation and air conditioning
TABS thermally activated building systems
TBM technical building management
VFD variable flow dependant
VRF variable room flow
© ISO 2021 – All rights reserved 5

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ISO/FDIS 52120-1:2021(E)

5 Description of the method
5.1 Output of the method
This document describes two methods of how to calculate the contribution of building automation and
controls to the energy
...

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