Save water, save lives

Save water, Save lives,
Be sustainable?

Table of Content
• Why should we work on water saving?
• How could we save water in the Sustainable Buildings?
• How much water saving percent could we reach?

Why should we work on saving water?

The Impacts of building on resources in United States:
• 40% Primary energy use
• 72% Electricity consumption
• 39% CO2 emission
• 13.6% Potable water consumption


1- the water consumption:
• In 2006 the broadcasted water
consumption for the year of
2010 was 12%.
• Now in the year 2010 it’s
13.5%.
• Tacking in your consideration
the number of green building
already constructed and
renovated throw these years,
you could find clearly that our
consumption is rising.

• According to the EPA’s Water
Sense Program, while the U.S.
population increased 90%
from 1950 to 2000, the
demand of water increased
209%.

Water Cube Beijing Olympics 2008 Venue images


2- the water availability:
• Even though 70% of the Earth’s
surface is covered with water,
most of that (97%) is salt
water, 2% is frozen in glaciers
and ice caps, leaving only 1%
for human consumption.

*U.S. Geological Survey and Water Sense.


• How could we save water in the Sustainable
Buildings?

How could we save water in the Sustainable
Building?
• Specify more water efficient
appliances.
• Address alternative source of
water that can help satisfy the
needs.

Building?
water efficient appliances :
Faucet:
1- Aerator Faucet:
• The standard flow rate of
lavatory and kitchen faucet
models are 2.2gpm (Gallons per
minute)
• the most common aerators run
with 1.5gpm.
• resulting in over 30% water
saving. While some aerators run
as low as 0.5gpm, resulting in
more than 75%.

Building?
Faucet:
2- Metered faucet:
• Offer adjustable cycle times
resulting in a range of 1.3
USGPM down to 0.08USGPM
per cycle.
• Results in a 48% to 68%
saving.
• reassure that your faucet
won’t be left running.

Building?
Faucet:
3-Foot-pedal activated:
• Easier for users to turn on/off the
water with dirty or soapy hands.
• Reduce water waste.
• Leading to 30% or greater water
reduction.

Building?
Water applications:
Shower:
• EPACT’92 Government mandated
flow levels are at 2.5gpm.
• For low-flow showerheads, typically
range from 1.5gpm to 2.0gpm.
• Presents a 20-40% water saving.

The key to success with low-flow
showerheads, is not only using less
water, but providing the same -or
better- user experience.

Building?
Water applications:
Toilets:
• Toilet technologies use the
pressure built up in the water
supply lines to help complete
the flush by pushing water out,
rather than pulling it in a
gravity system.
• This provides the same function
while using less water.

Building?
Water applications:
Toilets:
• Dual-flush toilets are provide
two flush levels, a full flush
using 1.6gpf, and a partial
flush using only 0.8gpf.
• water saving can easily exceed
20% or more.

Building?
Urinals:
• New waterless urinals.
• This system use a
replaceable canister sealed
with fluid sealer.

Building?
Irrigation:
• Using native species of plants,
gives us the magnitude
opportunity to minimize the
need for irrigation.
• Installing high-efficiency
irrigation systems like smart
weather-based irrigation
controllers.

Building?
Alternative sources of water:
Reusing Grey water:
• This water can be
collected using separate
drain lines.
• Filtered to remove large
particles.
• Stored and then
distributed to application
systems.

Building?
Reusing Grey water:
• 99% of the house holds sewage is water.
• These 99% divided as 40% from toilets, 30% from bath, 15%
from laundry, 10% kitchen, and 5% miscellaneous.
• Obviously, 30% water from the bath + 15% water from the
laundry, are more than the 40% water needed for toilet.

Building?
Capturing Air-Conditioning
Condensation:
• Air-conditioning condensate is
essentially distilled water, it is
very pure when first produced,
• But bacteria and other
contaminants can collect in the
piping and storage vessels.
• Therefore some form of
treatment is typically provided
even for non-potable uses.

Building?
Rainwater Harvesting:
• Rainwater is commonly used as a
source of non-potable water for
landscape irrigation, cooling tower
makeup, and for toilet flushing.
• While provide the sole source of water
for buildings in some locations such as:
Volcano- Hawaii, and the U.S. Virgin
Islands.

How could we save water in the Sustainable Building?

Conclusion:

• High-efficient and/or waterless appliances.
• Native species of plants.
• Grey-water use.
• Captured condensation water.
• Rain-water harvesting.


• How much percent of water saving could we
reach?

How much percent of water saving could we reach?

How much percent of water saving could we reach?
About SFS
• Middle School building with LEED platinum
certification.
• 93% less of the District's water supply is used
by treating sewage on site in constructed
wetland and reusing the water in toilets and
cooling-tower.
• Green-roof sequester rainwater and reduce
storm water runoff, students grow vegetables
and herbs for the cafeteria there.
• Landscape plant species are drought resistant
and able to thrive naturally in local area (No
potable water used for irrigation).

Designed by architect KieranTimberlake Associates and landscape design by
Andropogon Associates.
http://www.sidwell.edu/green_tour/index.aspx

Save water, save lives

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