daylight in buildings

1. Ar-2022
Daylight by
Design: Creating
Brighter, Greener
Spaces
By: Architect M.Tariq, Assistant Professor
Eramus Mundus Scholar UK, Finland, Spain

2. Table of contents
Introdution
What is daylighting
Benifits
Health, Enviromental
Priniciples
Basic terms
Methods
How we can harness
01
03
02
04

4. Introduction
Daylighting is the practice of placing windows,
skylights, other openings, so that direct or indirect
sunlight can provide effective internal lighting.
Source: Wikipedia
The term “daylighting” refers to architectural
design that allows natural light into buildings.

5. history
13th century
In the 13th century BC, the earliest windows were unglazed openings in a roof
to admit light during the day. Later, windows were covered with animal hide,
cloth, or wood. Shutters that could be opened and closed came next.

6. —(Robbins, 1986)
Daylighting has been associated with
improved mood, enhanced morale, less
fatigue, and reduced eyestrain.

7. Health benifits
A lack of sunlight has been linked to depression, known as Seasonal Affective
Disorder (S.A.D), suggesting that natural light is essential for maintaining a
healthy immune response and mood​.

8. Health benifits
Many studies show that the performance and productivity of workers in
offices, industrial, and retail environments can increase with the quality of
light.
Companies have recorded an increase in productivity of their employees of
about 15% after moving to a new building with better daylight conditions which
resulted in considerable financial gains (Edwards and Torcellini, 2002).

9. Health benifits
Ulrich (1984) reported that hospital patients with a view of green spaces, as
opposed to those with a view of a blank brick wall, recovered more quickly
from surgery and required less post-operative pain medication.
The content of the view can influence rental or cost price of hotels, dwellings
and office buildings (Kim and Wineman, 2005).

10. energy benifits
Another benefit of using daylighting for ambient and/or task illuminance in a
space is that it can save energy by reducing the need for electric lighting.
Several studies in office buildings have recorded the energy savings for
electric lighting from using daylight in the range of 20-60% (Galasiu, 2007)
Using daylighting correctly can lead to noticeable cost savings. Facilities Net
estimates that "a good daylighting design can save up to 75 percent of the
energy used for electric lighting in a building," leading to a lower energy bill.

11. We can create different patterns through
natural light in buildings

12. Principles of daylighting
Effective daylighting design
must manage glare, which can
cause discomfort and reduce
visibility
Orientation and
Placement:
Buildings should be oriented to
maximize natural light
exposure.
Window-to-Wall
Ratio (WWR)
The window-to-wall ratio, which is the
proportion of window area to wall area,
should be optimized. Too much glazing
can lead to excessive heat gain/loss and
glare, while too little can result in
insufficient daylight.
Glare Control Quality and
Quantity of Light
Daylighting is not just about
increasing the amount of light
but also about its quality.

13. Windows to wall ratio
• Window-wall ratio as measured on external elevations is between 20%
and 60%. Percentages greater than 40% require external to control
unwanted heat gain and glare.
• The optimal WWR for a double-glazed window for hot and cold climates is
60% and 70%

14. Methods
A derivation of roof lighting,
daylight is directed using
reflective tubes
Directions of the
Windows
The placement of the windows
in the house must be in such a
way that natural light could
comfort the house throughout
the day
skylights
A skylight (sometimes called a rooflight)
is a light-permitting structure or window,
usually made of transparent or translucent
glass, that forms all or part of the roof
space of a building for daylighting and
ventilation purposes
Light pipes
Glass blocks
Also known as glass bricks,
these materials turn
walls into windows.

15. We can create different patterns through
natural light in buildings