ISO 19454:2019

Building environment design — Indoor environment — Daylight opening design for sustainability principles in visual environment

This document provides a design process for daylight openings in order to ensure the principle of sustainability in the indoor visual environment. The design process for daylight openings includes the consideration of: — sunshine duration in the building interiors; — daylight opening ratio to the wall area of a habitable room; — daylight opening ratio to the floor area of a habitable room; — appropriate levels of indoor daylight based on human visual needs and the extent of sunlight; — daylight control systems in the building; — thermal comfort, thermal gains and energy efficiency. This document is applicable to building environment design for new buildings and the retrofit of existing buildings.

Conception des bâtiments — Espace intérieur — Conception des prises du jour pour les principes de durabilité dans l'environnement visuel

General Information

• Status: Published
• Publication Date: 20-Aug-2019
• ICS: 91.040.01 - Buildings in general
• Technical Committee: ISO/TC 205 - Building environment design
• Drafting Committee: ISO/TC 205/WG 7 - Indoor visual environment
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Jul-2024
• Completion Date: 15-Jul-2024

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19454
First edition
2019-08
Building environment design —
Indoor environment — Daylight
opening design for sustainability
principles in visual environment
Conception des bâtiments — Espace intérieur — Conception des prises
du jour pour les principes de durabilité dans l'environnement visuel
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Fundamentals . 4
4.1 General . 4
4.2 General principles of sustainability . 5
4.3 Project information . 5
4.4 Framework of generation and verification . 5
4.5 Framework of documentation at approval . 6
4.6 Harmonization of architectural and daylight opening design. 6
5 Design elements of daylight openings . 6
5.1 General . 6
5.2 Matrix of aspects of daylight opening design . 7
5.3 Daylight opening ratio to the wall area . 8
5.4 Daylight opening ratio to the floor area . 8
5.5 Levels of indoor daylight and the extent of sunlight . 8
5.6 Quality of views to exterior . 8
5.7 Daylight control systems in the building . 9
6 Design process of daylight openings . 9
6.1 General . 9
6.2 Stage I — Formulation of project definition . 9
6.2.1 Project definition . 9
6.2.2 Output — Document I .10
6.2.3 Evaluation I .10
6.2.4 Output — Approval of document I .10
6.2.5 Iteration .10
6.3 Stage II – Schematic design .10
6.3.1 General.10
6.3.2 Input .10
6.3.3 Output .11
6.3.4 Evaluation II .11
6.3.5 Approval of document II .11
6.4 Stage III – Detailed design .11
6.4.1 General.11
6.4.2 Input .11
6.4.3 Output – Document IIIa.12
6.4.4 Analysis .12
6.4.5 Output – Document IIIb .12
6.4.6 Evaluation III .13
6.4.7 Approval of documents IIIa and IIIb .13
6.4.8 Iteration into detail design .13
6.5 Stage IV – Final design .13
6.5.1 General.13
6.5.2 Commissioning documents .14
6.5.3 Cost estimation .14
6.5.4 Output: the final documents .14
Annex A (normative) Flow diagram of the design process .16
Annex B (informative) Basic architectural forms of the daylight opening .17
Annex C (informative) Matrix of aspects of daylight opening design .19
Annex D (informative) Matrix of output required to satisfy daylight opening design .23
Bibliography .26
iv © ISO 2019 – All rights reserved

Foreword
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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
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 205, Building environment design.
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.
Introduction
ISO 16813 provides general principles for the design of the indoor environment for buildings. The
design process for the indoor visual environment is provided by ISO 16817 to ensure required visual
comfort, good physiological effects of light and building energy performance and sustainability.
This document provides design team members with a design process for daylight openings under the
umbrella of ISO 16813 and ISO 16817. Receiving daylight is a fundamental human need. It is essential
to ensure favourable daylight environments in buildings. Daylight opening design is an indispensable
element of building design. This document is targeted at habitable rooms in all buildings to ensure
sufficient, quality daylight.
For this document, both windows and rooflights are deemed daylight openings. The size and position of
the daylight openings affect the amount of daylight entering a room as well as the view from the daylight
opening. An appropriate sizing of the daylight opening ensures a necessary level of daylight and an
impression of spaciousness. However, large daylight openings can require more control of daylight in
terms of visual and thermal environments. Qualities of daylight admitted through the daylight opening
vary depending on the direction in which the daylight opening faces.
This document:
— provides a framework for taking into consideration various parameters and criteria in daylight
opening design;
— is intended for use by des
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