leed-eb water efficiency
DESCRIPTION
From the Philippine Society of Plumbing EngineersTRANSCRIPT
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Leadership in Energy & EnvironmentalDesign for Existing Buildings :Operations & Maintenance (LEED-EB)
WATER EFFICIENCY (WE)
presented by :Engr. Edgardo C. Calantuan, PEE, RMP
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GLOBAL RATING SYSTEM
LEED USA Green Globes - USA
LEED Canada HQE France
LEED - Brazil DGNB Germany
LEED Argentina BREEAM UK
LEED Poland Three Star - China
LEED Spain CASBEE Japan
LEED India GRIHA - India
Green Star Australia NABERS - Australia
Green Star New Zealand Green Rating Europe
Green Star South Africa ECB Sweden
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PHILIPPINE RATING SYSTEMB
uilding for
EcologicallyResponsiveDesignExcellence
The Philippine Green Building Council (PHILGBC) is thelargest green building movement in the Philippines and is the
premier forum where green building ideas are beingformulated, tested and promoted.
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WHAT IS LEED?
Leadership in Energy and Environmental
Design (LEED) is an ecology-orientedbuilding certification program rununder the auspices of the United States
Green Building Council (USGBC).
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KEY AREAS OF LEED
LEED concentrates its efforts on improving
performance across five (5) key areas of
environmental and human health :
sustainable site development
water savingsenergy efficiency
materials selection
indoor environmental quality
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LEED RATING SYSTEMS
LEED-NC (New Construction)
LEED-EB (Existing Buildings O & M)LEED-CI (Commercial Interiors)
LEED-CS (Core & Shell)
LEED for Schools
LEED for RetailLEED for Healthcare
LEED for Homes
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LEVELS OF LEED CERTIFICATIONBuildings can qualify for four (4) levels ofLEED certification :
Certified 40 49 points
Silver 50 59 points
Gold 60 79 points
Platinum 80 points & above7
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LEED-EB O&M CREDITSSS Sustainable Sites
WE Water EfficiencyEA Energy and Atmosphere
MR Materials and Resources
IEQ Indoor Environmental Quality
IO Innovation in Operation8
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LEED-EB O&M WE PREREQUISITE
WEp1 is new in LEED 2009 ; it does not apply to previous
LEED versions.
For LEED for Existing Building : Operations & Maintenance,
the threshold depends on when the facility was constructed or
last renovated.
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LEED-EB O&M WE PREREQUISITE
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing fixture and Fitting Efficiency
Information Gathering:
How many different types of each fixture are installed inthe building?
Are fixture specs or product data sheets available forthe installed fixtures?
What is the date of substantial completion for plumbing?
Was the project initially built before 1994?
If so, have there been renovations since 1994 that affected
plumbing fixtures?
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing fixture and Fitting Efficiency
Information Gathering (contd):
What opportunities exist for low-cost upgrades?
What upgrades will have the greatest effect on reducing
water consumption?
Are there any high-intensity water uses, for example, a
fitness center with showers?
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Efficiency Assessment:
Assess the efficiency of your basic indoor plumbingfixtures such as faucets, water closets, urinals, and
showerheads.
Determine how much potable water is consumedrelative to a LEED baseline case.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Efficiency Assessment (contd):
If your current bathroom, kitchen and janitorial closetfixtures are already highly efficient, you will probably
meet the prerequisite.
If your installed fixtures are older and exceed the
baseline, youll need to modify them.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Baseline Determinants:
Baseline is established by calculating how much water
the plumbing fixtures would use, based on actualoccupancy figures and usage patterns, if it were fully
compliant with IPC/UPC 2006 plumbing codes displayed
in Table 1.
For plumbing systems substantially completed before
1994, the baseline is set at 160% of the IPC/UPC
compliant figure.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Baseline Determinants (contd):
For plumbing systems substantially completed in 1994
or later, the baseline is set at 120% of the water usagewith code-compliant fixtures.
Buildings with a mixture of fixture installation dates
will use weighted average to determine the final
baseline.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Section 604 - Design of Building Water Distribution System
International Plumbing Code (IPC) 2006 Edition
The International Plumbing Code defines maximum
flow rates and consumption for plumbing fixtures
and fittings including private lavatories, publiclavatories (metering and those other than metering),
sink faucets, showerheads, urinals and water closets.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
Section 402.0 - Water-Conserving Fixtures and Fittings
Uniform Plumbing Code (UPC) 2006 Edition
The Uniform Plumbing Code defines water-conserving
fixtures and fittings for water closets, urinals andmetered faucets.
This ANSI-accredited code safeguards life, health,
property and public welfare by regulating andcontrolling the design, construction, installation,
quality of materials, location, operation & maintenance
or use of plumbing systems.
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LEED-EB O&M WE PREREQUISITEWEp1 : Minimum Indoor Plumbing Fixture and Fitting Efficiency
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LEED-EB O&M WE CREDITSWEc1 Water Performance MeasurementWEc2* Innovative Wastewater Technologies
WEc3 Water Efficient LandscapingWEc4 Cooling Tower Water Management* Applicable only for LEED-NC, LEED-CS
and LEED for Schools.
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LEED-EB O&M WE CREDIT 1
A point is earned by metering and logging water
use on a continuous basis.
If subsystems are also metered, an additional
point is earned.
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LEED-EB O&M WE CREDIT 1
Intent:
To measure building
and subsystem water
performance over timeto understand
consumption patterns
& identify opportunities
for additional water
savings.
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LEED-EB O&M WE CREDIT 1Requirements:
Have in place permanently
installed water metering that
measures the total potable
water use for the entire bldg.
and associated grounds.
Meter data must be recorded
on a regular basis and
compiled into monthly and
annual summaries.
It is also encouraged to meter
gray or reclaimed water
supplied to the building.
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LEED-EB O&M WE CREDIT 1
Potential Technology & Strategy:
Install a building-levelwater meter to
measure and track
total potable water
consumption in the
facility.
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LEED-EB O&M WE CREDIT 1
Intent:
To measure building andsubsystem water performance
over time to understandconsumption pattern and
identify opportunities foradditional water savings.
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LEED-EB O&M WE CREDIT 1Requirements:
Meet the requirements for Option 1
and have in place permanently
installed metering for 1 or more
of the following water subsystems:
1. Domest ic ho t water. Meter water use of
at least 80% of the installed domestic hot
water heating capacity (including both
tanks and on-demand heaters).
2. Cool ing towers. Meter replacement
water use of all cooling towers serving
the facility.
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LEED-EB O&M WE CREDIT 1Requirements (contd):
3. Irr igation. Meter water systemsserving at least 80% of theirrigated landscape area on thegrounds.
The percentage of irrigated landscapearea served must be calculated as thetotal metered irrigated landscape areadivided by the total irrigated landscape
area.
All landscaping areas fully covered withxeriscaping or native vegetation thatrequires no routine irrigation must beexcluded from the calculation entirely.
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LEED-EB O&M WE CREDIT 1Requirements (contd):
4. Indoo r plumbing f ixtures andf i t t ings. Meter water systemsserving at least 80% of the indoorplumbing fixtures and fittingsdescribed in Water Efficiency
(WE) Prerequisite 1, eitherdirectly or by deducting all other measuredwater use from the measured total waterconsumption of the building and grounds.
5. Other process w ater. Meter at least 80% of
expected daily water consumption forprocess-type end uses, such as pools,humidification systems, clothes washers,dishwashers, and other systems usingprocess water.
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LEED-EB O&M WE CREDIT 1Requirements (contd):
Meters must measure potable water
use, but gray or reclaimed water
use may also be measured to meet
the requirements of this credit.
Metering must be continuous and data-
logged to allow for an analysis of time
trends.
The project must compile monthly and
annual summaries of results for each
subsystem metered.
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LEED-EB O&M WE CREDIT 1
Potential Technologies & Strategies:
Install subsystem-level water metering
to measure and track potable water
consumption by specific building systems.
Prioritize metering for those systems that
use the most potable water.
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LEED-NC/CS/Schools WE CREDIT 2
Using water-conserving toilets and urinals and/or non-potable
water sources, points are earned by reducing the amount of water
used to flush human waste.
Sophisticated on-site wastewater treatment systems can also be
used to comply.
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LEED-NC/CS/Schools WE CREDIT 2
Intent:
To reduce waste
water generationand potable
water demand
while increasing
the local aquifer
recharge.
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LEED-NC/CS/Schools WE CREDIT 2Requirements:
Reduce potable water use for
building sewage
conveyance by 50% through
the use of water - conservingfixtures (e.g., water closets,
urinals) or non-potable water
(e.g., captured rainwater,
recycled graywater, municipally-
treatedwastewater or on-site treated
wastewater).
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LEED-NC/CS/Schools WE CREDIT 2
Potential Technology & Strategy:
Specify high-efficiency fixtures and
dry fixtures (e.g., composting toilet
systems, non-water-using urinals)
to reduce wastewater volumes.
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LEED-NC/CS/Schools WE CREDIT 2
Requirements:
Treat 50% of wastewater on-sitetertiary standards. Treated watermust be infiltrated or used on-site.
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LEED-NC/CS/Schools WE CREDIT 2Potential Technologies & Strategies:
Consider reusing stormwater or
graywater for sewage conveyance
or on-site mechanical and/or
natural wastewater treatment
systems.
Options for on-site wastewater
treatment include:
1. packaged biological nutrient
removal systems
2. constructed wetlands
3. high efficiency filtration systems
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LEED-EB O&M WE CREDIT 3
Points are earned for educing water use in irrigation byusing:
1. drought-resistant landscaping
2. efficient irrigation systems
3. non-potable water sources.
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LEED-EB O&M WE CREDIT 3
Intent:
To limit or eliminate the use of potable water, or other
natural surface or subsurface resources available on
or near the site, for landscape irrigation.
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LEED-EB O&M WE - CREDIT 3Requirements:
Calculate the mid-summer baselineirrigation water use by determining
the water use that would result
from using an irrigation system
typical for the region and compare
this with the buildings actualirrigation potable water use which
can be determined through
sub-metering.
Use the baseline and actual wateruse values to calculate the
percentage reduction in potable
water or other natural surface or
subsurface resource use.
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LEED-EB O&M WE - CREDIT 3
Potential Technology & Strategy:
Feed irrigation systems
with captured rainwater,
gray water (on-site or
municipal), municipally
reclaimed water or on-
site treated wastewater.
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LEED-EB O&M WE CREDIT 3Requirements:
Calculate the estimated mid-summer irrigation water use bydetermining the landscape area forthe project and sorting this areainto the major vegetation types.
Determine the referenceevapotranspiration rate (ET0) forthe region and determine thespecies factor (ks), density factor(kd) and microclimate factor (kmc)for each vegetation type.
Use this information to calculatethe landscape coefficient (KL) andirrigation water use for the designcase.
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LEED-EB O&M WE CREDIT 3
Requirements (contd):
Calculate the baseline caseirrigation water use by setting theabove factors to average valuesrepresentative of conventionalequipment and design practices.
Use the estimated and baselinecase to determine the percentage
reduction in potable water or othernatural surface or subsurfaceresource use.
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LEED-EB O&M WE CREDIT 3
Potential Technology & Strategy:
Specify water efficient,
climate-tolerant native or
adapted plantings.
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LEED-EB O&M WE CREDIT 3Requirements:
If independent irrigation
performance and ranking
tools are available from
local, regional, state
or national sources,
use such tools to
demonstrate reductions
in potable water or other
natural surface orsubsurface resource for
irrigation purposes.
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LEED-EB O&M WE CREDIT 3
Potential Technology & Strategy:
Implement or maintain
high-efficiency irrigationtechnologies, such as
micro-irrigation, moisture
sensors or weather data-
based controllers.
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LEED-EB O&M WE CREDIT 4
One or two points are earned for managing water usein cooling towers and/or using non-potable make-upwater.
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Intent:
To reduce potable waterconsumption for cooling
tower equipment through
effective water treatment
management.
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LEED-EB O&M WE CREDIT 4Requirements:
Develop and implement a water
management plan for the cooling tower
that addresses chemical treatment, bleed-
off, biological control and staff training as
it relates to cooling tower maintenance.
Improve water efficiency by installing
and/or maintaining a conductivity meter
and automatic controls to adjust the bleedrate and maintain proper concentration at
all times.
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LEED-EB O&M WE CREDIT 4
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Potential Technologies & Strategies:
Work with a water treatment specialist to
develop a water management strategy
addressing the appropriate chemical
treatment and bleed-off to ensure proper
concentration levels in the cooling tower.
Develop a biocide treatment program to
avoid biological contamination and the
risk ofLegionel lain the building.
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LEED-EB O&M WE CREDIT 4Intent:
To reduce potable water consumption forcooling tower equipment through effective
water management and/or use of non-potable makeup water.
Requirements:
Use makeup water that consists of at least50% non-potable water, such as:
1. harvested rainwater
2. harvested stormwater
3. air-conditioner condensate4. swimming pool filter backwash water
5. cooling tower blowdown
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LEED-EB O&M WE CREDIT 4
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Requirements (contd):
6. pass-through (once-through)cooling water
7. recycled treated wastewater from
toilet & urinal flushing
8. foundation drain water
9. municipally-reclaimed water
10. any other appropriate on-site watersource that is not naturally occurring
groundwater or surface water.
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LEED-EB O&M WE CREDIT 4
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Requirements (contd):
Have a measurement program in placethat verifies makeup water quantities used
from non-potable sources.
Meters must be calibrated within the
manufacturers recommended interval ifthe management organization, building
owner or tenant owns the meter.
Meters owned by third parties, such as
utilities or governments) are exempted.
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LEED-EB O&M WE CREDIT 4
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Potential Technologies & Strategies:
Identify non-potable water sources that
may be suitable for use in the cooling
tower make-up water.
Ensure that the water meets the cooling
tower manufacturers guidelines in terms
of water purity and adjust the chemicaltreatment program accordingly.
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Thank You ! ! !