ISO 52032-1:2022

INTERNATIONAL ISO
STANDARD 52032-1
First edition
2022-03
Energy performance of buildings —
Energy requirements and efficiencies
of heating, cooling and domestic hot
water (DHW) distribution systems —
Part 1:
Calculation procedures
Performance énergétique des bâtiments — Besoins énergétiques
et rendements des systèmes de distribution d'eau chaude sanitaire,
chauffage et refroidissement —
Partie 1: Modes opératoires de calcul
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, subscripts and abbreviated terms . 2
4.1 Symbols . 2
4.2 Subscripts . . 3
4.3 Abbreviated terms . 3
5 General description of the method — Output of the method . 3
6 Calculation of heat losses and auxiliary energy of distribution systems .4
6.1 Output data . 4
6.2 Calculation time intervals . 5
6.3 Input data . 5
6.3.1 Product technical data (quantitative) . 5
6.3.2 Configuration and system design data . 5
6.3.3 Operating or boundary conditions . 6
6.3.4 Constants and physical data . 7
6.3.5 Input data from Annex A (with default choices in Annex B) . 7
6.4 Calculation procedure . . 8
6.4.1 Applicable time interval . 8
6.4.2 Operating conditions calculation . 8
6.4.3 Heat loss calculation . 8
6.4.4 Recoverable energy . 11
6.4.5 Auxiliary energy calculation . 11
6.4.6 Auxiliary energy for ribbon heater . 14
6.4.7 Recoverable and recovered auxiliary energy . 14
6.4.8 Lengths of pipes . 14
7 Quality control .18
8 Conformance check .18
Annex A (normative) Input and method selection data sheet — Template .19
Annex B (informative) Input and method selection data sheet — Default choices .26
Bibliography .34
iii
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
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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).
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This document was prepared by Technical Committee ISO/TC 205, Building environment design.
A list of all parts in the ISO 52032 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.
iv
Introduction
This document belongs to the family of International Standards aimed at the international
harmonization of the methodology for assessing the energy performance of buildings. Throughout, this
group of standards 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. For the correct use of this document a template is given in Annex A
to specify these choices. Default choices are provided in Annex B.
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.
[12]1) [4]
More information is provided in ISO/TR 52032-2 and in CEN/TR 15316-6-3 .
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 1 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 2 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, e.g. a simplified and a detailed method
respectively. See also Clause 2 and Tables A.1 and B.1.
1) Under preparation. Stage at the time of publication: ISO/AWI TR 52032-2.
v
vi
Table 1 — Position of this document within the modular structure of the set of EPB standards
Building (as
Overarching Technical building systems
such)
Domes- Building
Electric-
Descrip- Descrip- Descrip- Ventila- Humidifica- Dehumidifica- tic hot Light- automa-
Heating Cooling ity pro-
tions tions tions tion tion tion water ing tion and
duction
(DHW) control
sub1 M1 sub1 M2 sub1 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General 1 General 1 General
Common
terms and
Building
definitions;
2 2 energy 2 Needs
symbols,
needs
units and
subscripts
(Free)
Indoor Maximum
Applica-
3 3 conditions 3 load and
tions
without power
systems
Ways to Ways to Ways to
express express express
4 4 4
energy per- energy per- energy per-
formance formance formance
Building
Heat
functions
transfer by Emission
5 and build- 5 5
transmis- and control
ing bounda-
sion
ries
Building
Heat trans- ISO ISO ISO
occupan- Distribu-
fer by infil- 52032-1 52032-1 52032-1
6 cy and 6 6 tion and
tration and (this doc- (this doc- (this doc-
operating control
ventilation ument) ument) ument)
conditions
Aggre-
gation of
energy Internal Storage and
7 7 7
services heat gains control
and energy
carriers
vii
Table 1 (continued)
Building (as
Overarching Technical building systems
such)
Domes- Building
Electric-
Descrip- Descrip- Descrip- Ventila- Humidifica- Dehumidifica- tic hot Light- automa-
Heating Cooling ity pro-
tions tions tions tion tion tion water ing tion and
duction
(DHW) control
sub1 M1 sub1 M2 sub1 M3 M4 M5 M6 M7 M8 M9 M10 M11
Building
Solar heat
8 partition- 8 8 Generation
gains
ing
Combus-
8–1
tion boilers
8–2 Heat pumps
Thermal
solar
8–3
photovol-
taics
On-site co-
8–4
generation
District
8–5 heating and
cooling
Direct
8–6 electrical
heater
Wind tur-
8–7
bines
Radiant
8–8 heating,
stoves
Load
Building
Calculated dispatch-
dynamics
9 energy per- 9 9 ing and
(thermal
formance operating
mass)
conditions
Measured Measured Measured
10 energy per- 10 energy per- 10 energy per-
formance formance formance
11 Inspection 11 Inspection 11 Inspection

viii
Table 1 (continued)
Building (as
Overarching Technical building systems
such)
Domes- Building
Electric-
Descrip- Descrip- Descrip- Ventila- Humidifica- Dehumidifica- tic hot Light- automa-
Heating Cooling ity pro-
tions tions tions tion tion tion water ing tion and
duction
(DHW) control
sub1 M1 sub1 M2 sub1 M3 M4 M5 M6 M7 M8 M9 M10 M11
Ways to
express
12 12 – 12 BMS
indoor
comfort
External
environ-
ment condi-
tions
Economic 15459–
calculation 1
NOTE The shaded modules are not applicable

INTERNATIONAL STANDARD ISO 52032-1:2022(E)
Energy performance of buildings — Energy requirements
and efficiencies of heating, cooling and domestic hot water
(DHW) distribution systems —
Part 1:
...