The document discusses natural ventilation as an energy efficient solution for the Deck House building. It describes strategies used to enhance natural ventilation, including building placement on stilts to capture wind, using vegetation to modify wind direction, an open floor plan, and openings placed to promote cross ventilation and stack ventilation to flush out stale air. The natural ventilation strategies help reduce energy consumption by decreasing the need for mechanical ventilation and air conditioning.

1. THE USE OF NATURAL VENTILATION AS A ENERGY
EFFICIENT SOLUTION IN THE DECK HOUSE.
BUILDING
PLACEMENT
VEGETATION
&
LANDSCAPE
STRATEGIES
RESPONDING TO
THE RENEWABLE
ENERGY AND
ENVIRONMENTAL
ISSUES
OBJECTIVE
RENEWABLE ENERGY
WIND
NATURAL FACTOR
VENTILATION
OPEN
FLOOR
PLAN
OPENING
PLACEMENT

2. What is renewable energy in architecture?
A resource which is generated from sources which are not finite or exhaustible, in
order to achieve sustainability in a building.
These renewable energy practices save money, result in more attractive
buildings, and they improve the environment and strengthen the economy by
reducing the need for fossil fuels and nuclear energy.

3. The use of a building's structure to capture sunlight and store heat will reduce the
need for electric lights and improves the visual qualities of a space. Also save up to
50 % of the energy used in a home.
Sunlight as renewable energy in heating.
Example: West-facing windows transmit especially large amounts of heat in the
afternoon, and they can cause extensive overheating. Low energy design requires
the use of solar shading, by means of awnings, blinds or shutters, to relieve the
solar heat gain in summer and to reduce the need for artificial cooling.

4. Wind as renewable energy in cooling.
To enhance passive cooling, a building's windows should be placed and designed to
capture prevailing winds.
A casement window that opens to the wind can allow breezes into the building; a
window on the opposite side will allow stagnant air to be flushed out.
The use of breezes for cooling can be used in conjunction with the natural tendency
of hot air to rise. With a high point designed in a building, the natural movement of
hot air to the ceiling can be combined with an opening to the outside.

5. How does the wind work outside the Deck House?
As naturally occurring wind blows
across a building, the wind hits the
windward wall causing a direct
positive pressure.
The wind moves around the building
and leaves the leeward wall with a
negative pressure, also known as a
sucking effect.
If there are any openings on the
windward and leeward walls of the
building, fresh air will rush in the
windward wall opening and exit the
leeward wall opening to balance and
relieve the pressures on the
windward and leeward walls.

6. Raised on stilts allowing adequate
ventilation and capture high velocity
wind.
Vegetation can help modify the
external wind direction so as to
enhance ventilation as well as cool
incoming air. Dense shrubs and tree
canopies should be kept clear of
windows and other openings to
minimise obstruction to air
movement.
High trees with large canopies,
reduce significantly the wind speed
in the area of the group of trees and
downwind.
How does the wind work outside the Deck House?

7. How does the wind work inside the Deck House?
The wind blow air through openings in
the wall on the windward side of the
building, and suck air out of openings
on the leeward side and the ceiling.
Stack Ventilation: Temperature
differences between warm air inside
and cool air outside cause the air in the
room to rise and exit at the aluminium
louvre on the top.

8. The strategies adopted to enhance natural ventilation.
Vegetation and Landscape
Natural Vegetation provide a cool Micro-
Climate.
Trees around does not only reduce solar
radiation but the evaporation process
also helps to cool the air.
The big canopies provide shade and
allowing the use of full-length windows
to capture the wind.

9. The strategies adopted to enhance natural ventilation.
Building Placement
The house raised on stilts capture
winds of higher velocity.
Elevated between lower canopy and
higher canopy in order to avoid
wind-break and does not block the
passage of winds.

10. The strategies adopted to enhance natural ventilation.
Open Floor Plan
The quality of openness is reflected
by the large open interior spaces
with minimal partitions and double-
volume spaces.
The minimal interior walls allowing
the air to move much more freely, in
some cases eliminating the need for
extensive ductwork.

11. The strategies adopted to enhance natural ventilation.
Openings Placement
Stack Ventilation
Full-length openable windows are
used to achieve ventilation at body
level. Thus, maximized heat
dissipation from body.
The use of breezes for cooling can be
used in conjunction with the natural
tendency of hot air to rise. With a
high point designed in a building, the
natural movement of hot air to the
aluminium louvers at the highest
part of the house. This design
emphasizes the importance of stack
ventilation and also achieve
aesthetic purpose.

12. The strategies adopted to enhance natural ventilation.
Openings Placement
Cross Ventilation
To enhance passive coolinglarge
openings placed on the windward
side and designed to capture
prevailing winds. Which placing
inlets at higher pressure zones and
outlets at lower pressure zones
The openable full-length window
that opens to the wind can allow
breezes into the building; a window
on the opposite side will allow
stagnant air to be flushed out.

13. How does the natural ventilation help in reducing
energy consumption?
Natural ventilation in the Deck House saves significant amounts of fossil fuel based
energy by reducing the need for mechanical ventilation and air-conditioning.
From an environmental point of view, air-conditioning emits lots of carbon dioxide to the
atmosphere. Carbon dioxide is one of the primary contributor to green house gas effect
and global warming.

14. How does the natural ventilation help in reducing
energy consumption?
The terms zero emission apply to buildings that use renewable energy sources on site to
generate energy for their operation, so that over a year the net amount of energy
generated on site equals the net amount of energy required by the building.