Energy performance of buildings — Overall energy performance assessment procedures — Part 2: Guideline for using indoor environmental input parameters for the design and assessment of energy performance of buildings

ISO/TR 17772-2:2018 deals with the indoor environmental parameters for thermal environment, indoor air quality, lighting and acoustic. It explains how to use ISO 17772‑1 for specifying indoor environmental input parameters for building system design and energy performance calculations. ISO/TR 17772-2:2018: - specifies methods for long-term evaluation of the indoor environment obtained as a result of calculations or measurements; - specifies criteria for measurements which can be used if required to measure compliance by inspection; - identifies parameters to be used by monitoring and displaying the indoor environment in existing buildings. ISO/TR 17772-2:2018 is applicable where the criteria for indoor environment are set by human occupancy and where the production or process does not have a major impact on indoor environment. It explains how different categories of criteria for the indoor environment can be used.

Performance énergétique des bâtiments — Modes opératoires d'évaluation de la performance énergétique globale — Partie 2: Lignes directrices pour l'utilisation des paramètres d'entrée de l'environnement intérieur pour la conception et l'évaluation de la performance énergétique des bâtiments

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Published
Publication Date
03-Apr-2018
Current Stage
6060 - International Standard published
Start Date
04-Apr-2018
Completion Date
04-Apr-2018
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ISO/TR 17772-2:2018 - Energy performance of buildings -- Overall energy performance assessment procedures
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TECHNICAL ISO/TR
REPORT 17772-2
First edition
2018-04
Energy performance of buildings —
Overall energy performance
assessment procedures —
Part 2:
Guideline for using indoor
environmental input parameters for
the design and assessment of energy
performance of buildings
Performance énergétique des bâtiments — Modes opératoires
d'évaluation de la performance énergétique globale —
Partie 2: Lignes directrices pour l'utilisation des paramètres d'entrée
de l'environnement intérieur pour la conception et l'évaluation de la
performance énergétique des bâtiments
Reference number
ISO/TR 17772-2:2018(E)
ISO 2018
---------------------- Page: 1 ----------------------
ISO/TR 17772-2:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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Published in Switzerland
ii © ISO 2018 – All rights reserved
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ISO/TR 17772-2:2018(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols and abbreviated terms ........................................................................................................................................................... 2

4.1 Symbols ......................................................................................................................................................................................................... 2

4.2 Abbreviated terms ............................................................................................................................................................................... 2

5 Interactions with other standards and use of categories .......................................................................................... 3

6 How to establish design input criteria for dimensioning of buildings, heating,

cooling, ventilation and lighting systems ................................................................................................................................... 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 Thermal environment ....................................................................................................................................................................... 4

6.2.1 General...................................................................................................................................................................................... 4

6.2.2 Mechanically heated and/or cooled buildings ....................................................................................... 4

6.2.3 Buildings without mechanical cooling .......................................................................................................... 5

6.2.4 Increased air velocity ................................................................................................................................................... 7

6.3 Design for indoor air quality (ventilation rates)........................................................................................................ 7

6.3.1 General...................................................................................................................................................................................... 7

6.3.2 Methods ................................................................................................................................................................................... 8

6.3.3 Non-residential buildings ........................................................................................................................................ 9

6.3.4 Residential buildings .................................................................................................................................................... 9

6.3.5 Access to operable windows ...............................................................................................................................10

6.3.6 Filtration and air cleaning ....................................................................................................................................10

6.4 Humidity ....................................................................................................................................................................................................11

6.5 Lighting .......................................................................................................................................................................................................11

6.5.1 General...................................................................................................................................................................................11

6.5.2 Non-residential buildings .....................................................................................................................................11

6.5.3 Residential buildings .................................................................................................................................................12

6.6 Noise .............................................................................................................................................................................................................12

7 Indoor environment parameters for energy calculation ........................................................................................12

7.1 General ........................................................................................................................................................................................................12

7.2 Thermal environment ....................................................................................................................................................................12

7.2.1 General...................................................................................................................................................................................12

7.2.2 Seasonal and monthly calculations ...............................................................................................................12

7.2.3 Hourly calculations or dynamic building simulation ....................................................................12

7.3 Indoor air quality and ventilation .......................................................................................................................................13

7.3.1 General...................................................................................................................................................................................13

7.3.2 Non-residential buildings .....................................................................................................................................13

7.3.3 Residential buildings .................................................................................................................................................13

7.4 Humidity ....................................................................................................................................................................................................13

7.5 Lighting .......................................................................................................................................................................................................13

8 Evaluation of the indoor environment and long-term indicators ..................................................................13

8.1 General ........................................................................................................................................................................................................13

8.2 Design indicators ...............................................................................................................................................................................13

8.3 Calculated indicators of indoor environment ...........................................................................................................14

8.3.1 Simple indicator ............................................................................................................................................................14

8.3.2 Hourly criteria .................................................................................................................................................................14

8.3.3 Degree hours criteria ................................................................................................................................................14

8.3.4 Overall thermal comfort criteria (weighted PMV criteria) .......................................................14

8.4 Measured indicators ........................................................................................................................................................................14

© ISO 2018 – All rights reserved iii
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ISO/TR 17772-2:2018(E)

8.4.1 General...................................................................................................................................................................................14

8.4.2 Thermal environment ..............................................................................................................................................15

8.4.3 Indoor air quality and ventilation ..................................................................................................................15

8.4.4 Lighting .................................................................................................................................................................................15

8.4.5 Noise ........................................................................................................................................................................................15

8.5 Subjective evaluations ...................................................................................................................................................................16

9 Inspections and measurement of the indoor environment in existing buildings .........................16

9.1 Measurements ......................................................................................................................................................................................16

9.1.1 General...................................................................................................................................................................................16

9.1.2 Thermal environment ..............................................................................................................................................16

9.1.3 Indoor air quality .........................................................................................................................................................17

9.1.4 Indoor light quality measurements based on illuminance .......................................................18

10 Classification and certification of the indoor environment .................................................................................18

10.1 General ........................................................................................................................................................................................................18

10.2 Detailed classification and certification .........................................................................................................................18

10.3 Recommended overall evaluation of the indoor environment and certification ........................18

Annex A (informative) Information about national annexes ...................................................................................................19

Annex B (informative) Recommended criteria for the thermal environment .......................................................20

Annex C (informative) Basis for the criteria for indoor air quality and ventilation rates .........................25

Annex D (informative) Example on how to define low and very low polluting buildings ..........................42

Annex E (informative) Examples of criteria for lighting ...............................................................................................................45

Annex F (informative) Indoor system noise criteria of some spaces and buildings ........................................46

Annex G (informative) Occupants schedules for energy calculations .............................................................................48

Annex H (informative) Long-term evaluation of the general thermal comfort conditions .......................54

Annex I (informative) Recommended criteria for acceptable deviations ...................................................................56

Annex J (informative) Methodologies for subjective evaluations........................................................................................59

Annex K (informative) Examples of classification and certification of the indoor environment .......60

Annex L (informative) Recommended criteria for personalized systems ..................................................................63

Annex M (informative) Recommended methods for substitute ventilation air by air cleaning ..........65

Annex N (informative) WHO criteria for health in the indoor environment ...........................................................68

Bibliography .............................................................................................................................................................................................................................69

iv © ISO 2018 – All rights reserved
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ISO/TR 17772-2:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use

in the built environment.
© ISO 2018 – All rights reserved v
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ISO/TR 17772-2:2018(E)
Introduction

This document provides guidance to users in the application of ISO 17772-1 and gives additional

background information. This document also describes and recommends additional topics related

to the evaluation of the indoor environmental quality and new possibilities to improve the indoor

environmental quality and reduce energy use of buildings like personalized systems, air cleaning

technologies, consideration of adapted persons, etc.

This document explains how design criteria can be established and used for dimensioning of systems.

It explains how to establish and define the main parameters to be used as input for building energy

calculation and long-term evaluation of the indoor environment. This document also describes how gas

phase air cleaning in the future can improve the indoor air quality and partly substitute for outside air.

Finally, it identifies parameters to be used for monitoring and displaying of the indoor environment.

Different categories of criteria can be used depending on type of building, type of occupants, type of

climate and national differences. This document explains how these different categories of indoor

environment can be individually selected as national criteria, be used in project agreement for design

criteria and for displaying the yearly building performance in relation to indoor environmental quality.

The designer can also define other categories using the principles from ISO 17772-1 and this document.

vi © ISO 2018 – All rights reserved
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TECHNICAL REPORT ISO/TR 17772-2:2018(E)
Energy performance of buildings — Overall energy
performance assessment procedures —
Part 2:
Guideline for using indoor environmental input
parameters for the design and assessment of energy
performance of buildings
1 Scope

This document deals with the indoor environmental parameters for thermal environment, indoor air

quality, lighting and acoustic. It explains how to use ISO 17772-1 for specifying indoor environmental

input parameters for building system design and energy performance calculations.
This document:

— specifies methods for long-term evaluation of the indoor environment obtained as a result of

calculations or measurements;

— specifies criteria for measurements which can be used if required to measure compliance by

inspection;

— identifies parameters to be used by monitoring and displaying the indoor environment in existing

buildings.

This document is applicable where the criteria for indoor environment are set by human occupancy and

where the production or process does not have a major impact on indoor environment. It explains how

different categories of criteria for the indoor environment can be used.
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 13731, Ergonomics of the thermal environment — Vocabulary and symbols

ISO 17772-1, Energy performance of buildings — Indoor environmental quality — Part 1: Indoor

environmental input parameters for the design and assessment of energy performance of buildings

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 13731 and ISO 17772-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2018 – All rights reserved 1
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ISO/TR 17772-2:2018(E)
4 Symbols and abbreviated terms
4.1 Symbols

For the purposes of this document, the symbols given in ISO 52000-1:2017, Annex C, and the

following apply.
Symbol Quantity Unit
θ indoor operative temperature °C
θ outdoor temperature °C
Θ running mean outdoor air temperature °C
Θ daily mean outdoor temperature °C
ed-i
Θ operative temperature, design and energy calculations °C
Θ running mean outdoor temperature °C
rm-i
v air speed (average/maximum) m/s
Θ floor surface temperature °C
ΔCO concentration ppm
ΔΘ radiant temperature asymmetry K
ΔΘ vertical air temperature difference K
α constant for running mean calculations
q total ventilation rate l/s
tot
q ventilation rate for building materials l/s (m )
q ventilation rate for persons l/s (per person)
q total ventilation rate in occupied zone l/s (m ), l/s (person)
tot
n number of persons
q ventilation rate required for dilution of pollutant L/s
G generation of a pollutant µg/s
C guideline value of a pollutant µg/L
C guideline value of the substance µg /m
h,i
C supply concentration of a pollutant at air intake µg/L
h,o
ε ventilation effectiveness —
A floor area m
L A-weighed sound pressure level dB(A)
p,A
L equivalent continuous sound pressure level dB(A)
eq, nT,A
D daylight factor
DC daylight quotient of the Calculated area j
a,j
E average maintained illuminance lx
M activity level met
I assumed clothing level winter/summer clo
4.2 Abbreviated terms
ACH air changers per hour
DR draught rate, %
DSNA daylight quotient sunscreen not activated
IEQ indoor environmental quality
IEQ indoor environmental quality category for design
cat
2 © ISO 2018 – All rights reserved
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ISO/TR 17772-2:2018(E)
LPB low polluting building class
1–3
PD percentage dissatisfied for local thermal discomfort
PMV predicted mean vote
PPD predicted percentage of dissatisfied, %
RH relative humidity
5 Interactions with other standards and use of categories

This document interacts mainly with ISO 17772-1. This document explains how the indoor

environmental criteria in ISO 17772-1 can be used for the design of building and HVAC systems. The

thermal criteria (design indoor temperature in winter, design indoor temperature in summer) are used

as input for heating and cooling load calculations and sizing of the installed systems. Ventilation rates

are used for sizing ventilation systems, and lighting levels for design of lighting system including the use

of day lighting. The design values for sizing the building services are needed to avoid possible negative

effect of indoor environment and to give advice in respect of improvement of the energy efficiency of

existing buildings as well as of the heating and cooling of buildings.

This document explains how values for the indoor environment (temperature, ventilation, lighting)

are used as input to the calculation of the energy demand (building energy demand). Output from

measured indoor environmental parameters in existing buildings (temperature, CO , ventilation rates,

illumination levels) will enable the evaluation of overall annual performance and can be used to display

the indoor environmental factors together with data for the energy performance.

Output from room temperature calculations and yearly dynamic building simulations will enable

evaluation of the annual performance of buildings at the design stage.

This document describes methods for measurement of the indoor environment and for treating

measured data related to the inspection of HVAC systems.

This document provides a method for categorization of indoor environment (Clause 10). This method

can be used to integrate complex indoor environment information to simple classification for a possible

indoor environment certificate.
6 How to establish design input criteria for dimensioning of buildings, heating,
cooling, ventilation and lighting systems
6.1 General

Recommended input values are given for each of the different categories as shown in Table 1. These

categories can be used in different ways. First and foremost, they can be used to establish different

levels of criteria for the design of buildings and building services. Different countries can standardize

one category for design. The consultant and client of a building project can use the categories to agree

on a specific design level. The intention is not that a building should be operated strictly in one class

the whole year round. Instead the categories can be used to describe the yearly indoor environmental

performance of a building by showing the distribution of the parameters in the different categories. It

can then, on the national level or in a design/operation contract, be specified how much of the time the

categories can be exceeded. This is shown in this document with some examples.
© ISO 2018 – All rights reserved 3
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ISO/TR 17772-2:2018(E)
Table 1 — Categories of indoor environmental quality
Category Level of expectation Explanation
IEQ High Should be selected for occupants with
special needs (children, elderly, handi-
capped).
IEQ Medium The normal level used for design and
operation.
IEQ Moderate Will still provide an acceptable environ-
III
ment. Some risk of reduced performance
of the occupants.
IEQ Low Should only be used for a short time of
the year or in spaces with very short
time of occupancy.

Even if a building is designed for category III, it can still be operated at a greater part of the year in

category I or II. When the outdoor conditions are less severe (warmer in winter, colder in summer)

than the design day, the capacity of the heating/cooling system will be large enough to keep the indoor

environment within a narrower range.

It can be argued that selecting a higher category can increase the energy consumption. The energy

requirement is, however, regulated by national building codes and cannot be exceeded. The challenge

is then for the designer/operator of the building to obtain a high level of indoor environmental quality

within the required energy criteria.

For design of buildings and dimensioning of room conditioning systems, the thermal comfort criteria

(minimum room operative temperature in winter, maximum room operative temperature in summer)

will be used as input for heating load and cooling load calculations. The design ventilation rates that are

used for sizing the equipment are also used for energy calculations. The criteria are used as input values

for the sizing and dimensioning of the systems as well as for design of buildings (facades, orientation,

solar shading, etc.). Using a higher category will result in systems with a higher capacity; but depending

on how the system is operated, the energy use is not necessarily higher. In the design a design external

temperature for heating and a design day (including solar load) for cooling will normally be used.

To protect the designer/installer against complaint for not meeting the design intend, it is very

important that the basis for design (boundary conditions, occupant density, etc.) are documented in the

design documents. This will avoid discussions when these boundary conditions are changed during the

lifetime of the building and the performance criteria cannot be met.
6.2 Thermal environment
6.2.1 General

Field studies in office buildings have shown that people’s expectations regarding the thermal

environment can be different for buildings with installed mechanical cooling and buildings where the

occupant only have the possibility to open windows to influence the thermal environment. Therefore,

the design criteria are different for the two types of office buildings: mechanical heated and cooled

buildings and buildings without mechanical cooling (see the definition in ISO 17772-1). The decision on

which approach to use is taken by the client together with his consultant. It is possible for the consultant

to show the difference between the
...

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