Leed-eb Water Efficiency

7/15/2019 Leed-eb Water Efficiency

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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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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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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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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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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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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 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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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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Potential Technology & Strategy:

Install a building-levelwater meter to

measure and track

total potable water

consumption in the

facility.

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Intent:

To measure building andsubsystem water performance

over time to understandconsumption pattern and

identify opportunities foradditional water savings.

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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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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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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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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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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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Specify high-efficiency fixtures and

dry fixtures (e.g., composting toilet

systems, non-water-using urinals)

to reduce wastewater volumes.

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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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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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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


Feed irrigation systems

with captured rainwater,

gray water (on-site or

municipal), municipally

reclaimed water or on-

site treated wastewater.

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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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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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Specify water efficient,

climate-tolerant native or

adapted plantings.

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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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Implement or maintain

high-efficiency irrigationtechnologies, such as

micro-irrigation, moisture

sensors or weather data-

based controllers.

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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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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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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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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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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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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 ! ! !

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