ISO 15928-5:2013
(Main)Houses — Description of performance — Part 5: Operating energy
Houses — Description of performance — Part 5: Operating energy
ISO 15928-5:2013 sets out a method for describing the operating energy performance of houses. It covers user needs, provides performance descriptions and outlines evaluation processes. It includes the description of relevant parameters for external and internal climatic conditions, user functional requirements, energy used by the house and energy generated by the house. ISO 15928-5:2013 is intended to be used for houses that may be separated from, or linked horizontally to, another house(s). Where houses are linked, and some sharing of services occurs, it is intended that energy usage performance may be assessed both for individual houses, as well as a group of houses that are linked together.
Constructions d'habitation — Description des performances — Partie 5: Énergie d'exploitation
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INTERNATIONAL ISO
STANDARD 15928-5
First edition
2013-01-15
Houses — Description of
performance —
Part 5:
Operating energy
Constructions d’habitation — Description des performances —
Partie 5: Énergie d’exploitation
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Operating energy performance . 3
4.1 User needs . 3
4.2 Performance description . 3
4.3 Principles for describing operating energy performance . 3
5 Parameters for the description of performance . 4
5.1 Parameter for describing the external climatic environment of the house . 4
5.2 Parameters for describing the indoor conditions . 4
5.3 Parameters for describing the user functional requirements . 4
5.4 Parameters for describing energy used . 4
5.5 Parameters for describing the energy generated by the house . 4
6 Evaluation . 4
6.1 General . 4
6.2 Evaluation of the energy performance to maintain a specified indoor condition(s) . 5
6.3 Evaluation of the energy performance of the hot water supply . 5
6.4 Evaluation of the energy performance of the lighting system . 5
6.5 Evaluation of the energy generated by the house . 5
Annex A (informative) Commentary . 6
Bibliography .11
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 15928-5 was prepared by Technical Committee ISO/TC 59, Buildings and civil engineering works,
Subcommittee SC 15, Performance description of houses.
ISO 15928 consists of the following parts, under the general title Houses — Description of perfomance:
Part 1: Structural safety
Part 2: Structural serviceability
Part 3: Structural durability
Part 4: Fire safety
Part 5: Operating energy
iv © ISO 2013 – All rights reserved
Introduction
This part of ISO 15928 is one of a series of standards titled Houses — Description of performance. The
objective of the ISO 15928 series is to identify the methods that will be used to describe the performance
of houses. The ISO 15928 series is confined to buildings occupied for residential purposes that may be
separated or linked horizontally, but not linked vertically, and which have their own access and do not
share any common space.
Each part of ISO 15928 relates to a separate attribute. The parts of ISO 15928 do not specify levels
of performance and they are not intended to replace national standards or regulations, but provide a
standardized framework to be used for development of national standards and regulations consistent
with World Trade Organization (WTO) requirements. The parts of ISO 15928 do not provide design
methods and/or design criteria.
Based on the framework provided by the ISO 15928 series, purchasers, regulators and standards-
preparers in respective countries can describe their requirements in standardized performance terms,
as appropriate. Additionally, the manufacturers/providers can respond by describing the performance
of their products in a similar manner.
The purpose of this part of ISO 15928 is to provide a standardized system of describing performance
that can be used to specify performance requirements and performance levels, or to rate houses, in
terms of operating energy.
NOTE The WTO Agreement on technical barriers to trade, Clause 2.8, states: “Whenever appropriate, members
shall specify technical regulations based on product requirements in terms of performance, rather than design or
descriptive characteristics.”
INTERNATIONAL STANDARD ISO 15928-5:2013(E)
Houses — Description of performance —
Part 5:
Operating energy
1 Scope
This part of ISO 15928 sets out a method for describing the operating energy performance of houses.
It covers user needs, provides performance descriptions and outlines evaluation processes. It includes
the description of relevant parameters for external and internal climatic conditions, user functional
requirements, energy used by the house and energy generated by the house.
This part of ISO 15928 is intended to be used for houses that may be separated from, or linked horizontally
to, another house(s). Where houses are linked, and some sharing of services occurs, it is intended that
energy usage performance may be assessed both for individual houses, as well as a group of houses that
are linked together.
The ISO 15928 series is intended for use in the evaluation of the design and construction of houses and
in the international trading of houses or their sub-systems.
The ISO 15928 series does not specify a level of performance and it is not intended to provide a design
method and/or criteria.
NOTE Structural performance and other attributes are covered in other parts of ISO 15928.
2 Normative references
The following referenced documents are indispensable for the application 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 6707-1, Building and civil engineering — Vocabulary — Part 1: General terms
ISO 13790, Energy performance of buildings — Calculation of energy use for space heating and cooling
ISO 16818, Building environment design — Energy efficiency — Terminology
ISO 23045, Building environment design — Guidelines to assess energy efficiency of new buildings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6707-1, ISO 16818 and the
following apply.
3.1
house
building occupied for residential purposes and designed as one unit (dwelling) with its own access
Note 1 to entry: The house can be a separate building, or linked horizontally with another house but not
linked vertically.
Note 2 to entry: Where houses are linked, each has its own access and does not share any space in common
with another.
Note 3 to entry: Where houses are linked, services including those related to energy usage and supply, heating
and ventilation may be shared.
Note 4 to entry: Where houses are linked, the wall between the houses is typically designed and constructed to
limit the probability of fire spread between houses.
[SOURCE: ISO 15928-2:2005, 3.1, modified]
3.2
operating energy
net energy used by heating, cooling, ventilation, hot water, lighting system and other built-in appliances
(cooking facility, food storage facility, etc.), taking into account all sources of energy including renewable
energy sources and co-generation
3.3
performance description
statement that identifies agents, which affect performance in a qualitative manner, and establishes how
these agents affect the state of the house
3.4
user
person that a house is designed to accommodate
3.5
parameters
group of variables used to quantitatively describe performance
3.6
performance
behaviour of houses related to user needs
3.7
user needs
general statements of requirements for a house that are regarded as satisfactory by the user(s)
3.8
functionality
suitability or usefulness for a specific purpose or activity
3.9
functional requirement
functionality that is required by the user of a house
3.10
efficiency
performance at specified rating conditions
[SOURCE: ISO 16818:2008, 3.68]
3.11
thermal comfort
condition of mind derived from satisfaction with the thermal environment
Note 1 to entry: Thermal comfort is the combined thermal effect of environmental parameters including air
temperature, vapour pressure, air velocity, mean radiant temperature (fixed factors) and clothing and activity
level of occupants (variable factors).
[SOURCE: ISO 16813:2006, 3.28]
2 © ISO 2013 – All rights reserved
3.12
renewable energy
energy from a source that is not depleted by extraction, such as solar energy (thermal and photovoltaic),
wind, water power, renewed biomass
[SOURCE: ISO/TR 16344:2012, 2.1.123]
3.13
non-renewable energy
energy taken from a source which is depleted by extraction (e.g. fossil fuels)
[SOURCE: ISO/TR 16344:2012, 2.1.105]
4 Operating energy performance
4.1 User needs
The operating energy of a house shall be such that the risk of the following does not exceed (or meet) a
level acceptable to the user:
— not having suitable living conditions in regards to thermal comfort and functionality;
— inefficient energy use;
— use of non-renewable energy resources;
— use of renewable energy resources.
4.2 Performance description
The performance description for operating energy is the expression of the ability of the house and its
parts, with an appropriate degree of reliability, to provide suitable indoor climate conditions and to
fulfil the user needs on energy usage in the environment it is located over the specified design working
life when subject to its intended use and expected normal climate, in terms of the probability of:
a) the occupants experiencing suitable levels of thermal comfort,
b) the adequacy of internal illumination (lighting),
c) the availability of sufficient amounts of domestic hot water,
d) the efficient operation of other built-in appliances,
e) the consumption of energy being excessive, and
f) the depletion of non-renewable energy resources being excessive
NOTE 1 Built-in appliances are appliances that are fixed in place that cannot be removed or replaced easily.
Typical examples are lighting and domestic hot water, but could also include other items such as stove and
refrigeration unit.
NOTE 2 For the purpose of this part of ISO 15928, durabi
...
INTERNATIONAL ISO
STANDARD 15928-5
First edition
2013-01-15
Houses — Description of
performance —
Part 5:
Operating energy
Constructions d’habitation — Description des performances —
Partie 5: Énergie d’exploitation
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Operating energy performance . 3
4.1 User needs . 3
4.2 Performance description . 3
4.3 Principles for describing operating energy performance . 3
5 Parameters for the description of performance . 4
5.1 Parameter for describing the external climatic environment of the house . 4
5.2 Parameters for describing the indoor conditions . 4
5.3 Parameters for describing the user functional requirements . 4
5.4 Parameters for describing energy used . 4
5.5 Parameters for describing the energy generated by the house . 4
6 Evaluation . 4
6.1 General . 4
6.2 Evaluation of the energy performance to maintain a specified indoor condition(s) . 5
6.3 Evaluation of the energy performance of the hot water supply . 5
6.4 Evaluation of the energy performance of the lighting system . 5
6.5 Evaluation of the energy generated by the house . 5
Annex A (informative) Commentary . 6
Bibliography .11
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 15928-5 was prepared by Technical Committee ISO/TC 59, Buildings and civil engineering works,
Subcommittee SC 15, Performance description of houses.
ISO 15928 consists of the following parts, under the general title Houses — Description of perfomance:
Part 1: Structural safety
Part 2: Structural serviceability
Part 3: Structural durability
Part 4: Fire safety
Part 5: Operating energy
iv © ISO 2013 – All rights reserved
Introduction
This part of ISO 15928 is one of a series of standards titled Houses — Description of performance. The
objective of the ISO 15928 series is to identify the methods that will be used to describe the performance
of houses. The ISO 15928 series is confined to buildings occupied for residential purposes that may be
separated or linked horizontally, but not linked vertically, and which have their own access and do not
share any common space.
Each part of ISO 15928 relates to a separate attribute. The parts of ISO 15928 do not specify levels
of performance and they are not intended to replace national standards or regulations, but provide a
standardized framework to be used for development of national standards and regulations consistent
with World Trade Organization (WTO) requirements. The parts of ISO 15928 do not provide design
methods and/or design criteria.
Based on the framework provided by the ISO 15928 series, purchasers, regulators and standards-
preparers in respective countries can describe their requirements in standardized performance terms,
as appropriate. Additionally, the manufacturers/providers can respond by describing the performance
of their products in a similar manner.
The purpose of this part of ISO 15928 is to provide a standardized system of describing performance
that can be used to specify performance requirements and performance levels, or to rate houses, in
terms of operating energy.
NOTE The WTO Agreement on technical barriers to trade, Clause 2.8, states: “Whenever appropriate, members
shall specify technical regulations based on product requirements in terms of performance, rather than design or
descriptive characteristics.”
INTERNATIONAL STANDARD ISO 15928-5:2013(E)
Houses — Description of performance —
Part 5:
Operating energy
1 Scope
This part of ISO 15928 sets out a method for describing the operating energy performance of houses.
It covers user needs, provides performance descriptions and outlines evaluation processes. It includes
the description of relevant parameters for external and internal climatic conditions, user functional
requirements, energy used by the house and energy generated by the house.
This part of ISO 15928 is intended to be used for houses that may be separated from, or linked horizontally
to, another house(s). Where houses are linked, and some sharing of services occurs, it is intended that
energy usage performance may be assessed both for individual houses, as well as a group of houses that
are linked together.
The ISO 15928 series is intended for use in the evaluation of the design and construction of houses and
in the international trading of houses or their sub-systems.
The ISO 15928 series does not specify a level of performance and it is not intended to provide a design
method and/or criteria.
NOTE Structural performance and other attributes are covered in other parts of ISO 15928.
2 Normative references
The following referenced documents are indispensable for the application 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 6707-1, Building and civil engineering — Vocabulary — Part 1: General terms
ISO 13790, Energy performance of buildings — Calculation of energy use for space heating and cooling
ISO 16818, Building environment design — Energy efficiency — Terminology
ISO 23045, Building environment design — Guidelines to assess energy efficiency of new buildings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6707-1, ISO 16818 and the
following apply.
3.1
house
building occupied for residential purposes and designed as one unit (dwelling) with its own access
Note 1 to entry: The house can be a separate building, or linked horizontally with another house but not
linked vertically.
Note 2 to entry: Where houses are linked, each has its own access and does not share any space in common
with another.
Note 3 to entry: Where houses are linked, services including those related to energy usage and supply, heating
and ventilation may be shared.
Note 4 to entry: Where houses are linked, the wall between the houses is typically designed and constructed to
limit the probability of fire spread between houses.
[SOURCE: ISO 15928-2:2005, 3.1, modified]
3.2
operating energy
net energy used by heating, cooling, ventilation, hot water, lighting system and other built-in appliances
(cooking facility, food storage facility, etc.), taking into account all sources of energy including renewable
energy sources and co-generation
3.3
performance description
statement that identifies agents, which affect performance in a qualitative manner, and establishes how
these agents affect the state of the house
3.4
user
person that a house is designed to accommodate
3.5
parameters
group of variables used to quantitatively describe performance
3.6
performance
behaviour of houses related to user needs
3.7
user needs
general statements of requirements for a house that are regarded as satisfactory by the user(s)
3.8
functionality
suitability or usefulness for a specific purpose or activity
3.9
functional requirement
functionality that is required by the user of a house
3.10
efficiency
performance at specified rating conditions
[SOURCE: ISO 16818:2008, 3.68]
3.11
thermal comfort
condition of mind derived from satisfaction with the thermal environment
Note 1 to entry: Thermal comfort is the combined thermal effect of environmental parameters including air
temperature, vapour pressure, air velocity, mean radiant temperature (fixed factors) and clothing and activity
level of occupants (variable factors).
[SOURCE: ISO 16813:2006, 3.28]
2 © ISO 2013 – All rights reserved
3.12
renewable energy
energy from a source that is not depleted by extraction, such as solar energy (thermal and photovoltaic),
wind, water power, renewed biomass
[SOURCE: ISO/TR 16344:2012, 2.1.123]
3.13
non-renewable energy
energy taken from a source which is depleted by extraction (e.g. fossil fuels)
[SOURCE: ISO/TR 16344:2012, 2.1.105]
4 Operating energy performance
4.1 User needs
The operating energy of a house shall be such that the risk of the following does not exceed (or meet) a
level acceptable to the user:
— not having suitable living conditions in regards to thermal comfort and functionality;
— inefficient energy use;
— use of non-renewable energy resources;
— use of renewable energy resources.
4.2 Performance description
The performance description for operating energy is the expression of the ability of the house and its
parts, with an appropriate degree of reliability, to provide suitable indoor climate conditions and to
fulfil the user needs on energy usage in the environment it is located over the specified design working
life when subject to its intended use and expected normal climate, in terms of the probability of:
a) the occupants experiencing suitable levels of thermal comfort,
b) the adequacy of internal illumination (lighting),
c) the availability of sufficient amounts of domestic hot water,
d) the efficient operation of other built-in appliances,
e) the consumption of energy being excessive, and
f) the depletion of non-renewable energy resources being excessive
NOTE 1 Built-in appliances are appliances that are fixed in place that cannot be removed or replaced easily.
Typical examples are lighting and domestic hot water, but could also include other items such as stove and
refrigeration unit.
NOTE 2 For the purpose of this part of ISO 15928, durabi
...
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