EXAM PREP

Study Notes P R O C E S S

AT M O S P H E R E RESOURCES

&

E N E R G Y

MATERIALS

INDOOR ENVIRONMENTAL QUIALITY

&

E F F I C I E N C Y

S I T E S W A T E R

S U S T A I N A B L E

L O C AT I O N & T R A N S P O R TAT I O N

I N T E G R AT I V E

LEED v4 RATING SYSTEM

Use Study • • • • •

Notes to:

Understand concepts Learn from examples Analyze related credits Memorize exemplary credits Familiarize reference standards

Overview of Credits

WATER EFFICIENCY Sustainable Sites Credit

Title

Exemplary Performance

Prerequisite 1

Indoor Water Use Reduction

No

Prerequisite 2

Building-level Water Metering

No

Credit 1

Outdoor Water Use Reduction

No

Credit 2

Indoor Water Use Reduction

Yes

Credit 3

Cooling Tower Water Use

No

Credit 4

Water Metering

No

Overview of Credits

WATER EFFICIENCY Sustainable Sites Existing Schools Buildings

Retail

Data Centers

Warehouses and Distribution Centers

Hospitals

Req

Req

Req

Req

Req

Req

Req

Req

Req

Req

Req

Req

2

2

2

2

2

2

5

5

5

4

5

5

3

3

3

4

3

3

2

2

2

2

2

2

WE Prerequisite : Indoor Water Use Reduction

Existing bldgs, schools, retail, data centers, hospitality, warehouses & distribution centers- (Req.)

Associated Credits

To minimize indoor water consumption.

• WE Prerequisite BuildingLevel Water Metering

Option 1. Calculated Water Use Establishment: Reduce the water consumption to or below the LEED v4 for existing buildings baseline.

• WE Credit Water Metering

Referenced Standards • The Energy Policy Act of 1992 and as amended.

• EPAct 2005 • International Association of Plumbing and Mechanical Officials Publication IAPMO/ANSI UPC 1-2006, Uniform Plumbing Code 2006, Section 402.0, Water Conserving Fixtures and Fittings

Fixture / fitting

Baseline (IP units)

Baseline (SI units)

Toilet (water closet)*

1.6 gpf

6 lpf

Urinal*

1.0 gpf

3.8 lpf

Public lavatory (restroom) faucet

0.5 gpm @60 psi all other except private applications

1.9 lpm at 415kPA, all others except private applications

Private lavatory faucet*

2.2 gpm @ 60 psi

8.3 lpm @ 415kPa

Kitchen faucet (exclude faucets used only for filling operations)

2.2 gpm @ 60 psi

8.3 lpm @ kPa

Showerhead*

2.5 gpm @ 80psi per shower stall

9.5 lpm @ 550 kPa per shower stall

*WaterSense label available for this product type gpf = gallons per flush; gpm = gallons per minute; psi = pounds per square inch lpf = liters per flush; lpm = liters per minute; kPa = kilopascals

Exemplary Performance Referenced Standards •International Code Council, International Plumbing Code 2006, Section 604, Design of Building Water Distribution System • Energy Star • Consortium for Energy Efficiency • WaterSense • IgCG/ ASHRAE 189.1 – cooling tower and evaporative condenser equipments

WE Prerequisite : Indoor Water Use Reduction

The LEED v4 for existing buildings water use baseline is set based on the year of building’s occupancy, as follows: • For buildings with certificate of occupancy dated 1995 or later, the baseline is 120% of the water use that would result if all the fixtures comply the codes in Table 1. • For buildings with certificate of occupancy dated before 995, the baseline is 150% of the water use that would result if all the fixtures comply the codes in Table 1. Appliance

Requirement

Residential clothes washer

ENERGY STAR or performance equivalent

Commercial clothes washer

CEE Tier 3A

Residential dishwasher, standard or compact

ENERGY STAR or performance equivalent

Prerinse spray valve

≤1.3 gpm (4.9 lpm)

Ice machine

ENERGY STAR or performance equivalent, and use either air-cooled or closed-loop cooling, such as chilled or condenser water system

Kitchen faucet (exclude faucets used only for filling operations)

2.2 gpm @ 60 psi

Showerhead

2.5 gpm @ 80psi per shower stall

Exemplary Performance Referenced Standards • Consortium for Energy Efficiency • WaterSense • IgCG/ ASHRAE 189.1 – cooling tower and evaporative condenser equipments

WE Prerequisite : Indoor Water Use Reduction

Performance Show that all applicable purchases made during the performance period comply the requirements of the fixtures and fitting replacement and retrofit policy. Option 2: Metered Water Use Establishment Meter the fixtures and fittings and record metered data for one year of establish a water-use baseline. Performance Demonstrate that the water-use baseline has been maintained in case of project with 80% of fixtures and fittings metered. Based on preference and water meter data availability, select appropriate option. Option 1 is for projects that do not separately meter minimum 80% of fixtures or cannot isolate fixtures by subtracting all other building water systems, based on submeter data. Option 2 is for projects that separately meter minimum 80% of fixtures or can isolate fixtures by subtracting all other building water systems, based on submeter data. Option 1. Calculated Water Use • Determine baseline For buildings built before 1995 but renovated after initial occupancy in 1995 or later, apply equation 1 to establish the baseline multiplier Equation 1. Baseline Multiplier { (unrenovated % of fixtures + (renovated % of fixtures Baseline multiplier = installed before 1995 X 150%) installed in 1995 or later X 120%)} 100 • Collect information for calculator

Exemplary Performance

WE Prerequisite : Indoor Water Use Reduction

• Complete calculations Equation 1. Basic indoor water-use reduction calculation Daily water use for = Fixture flush or X Duration of use X Users x Uses/person/day Each fixture type flow rate Equation 2. Faucet flow rate conversion Flow rate (gpm) = Gallons per cycle (gpc) X 60 sec cycle duration (seconds) Flow rate (lpm) = Litres per cycle (lpc) X 60 sec cycle duration (seconds) Option 2. Metered Water Use • Establish baseline • Evaluate current practices and design • Make improvements • Calculate water usage during performance period • Measure percentage improvement using performance period data For all project: • Evaluate and repair all existing fixtures and fittings. • Formulate fixture and fitting replacement and retrofit policy • Document new purchases and installations • Confirm calculations

LEED Calculations - Baseline

Exemplary performance

WE Prerequisite : Water Use Reduction

Sample project: 400 occupants (50:50)

Fixture Type

Daily Uses

Flow rate GPF

Duration (flush)

Occupants

Water use (gal)

Water closet (Female)

3.00

1.60

1

200

960.00

Water closet (Male)

1.00

1.60

1

200

320.00

Urinal (Male)

2.00

1.00

1

200

400.00

Fixture Type

Daily Uses

Flow rate GPM

Duration (sec)

Occupants

Water use (gal)

Kitchen sink

1.00

2.50

15

400

250.00

Shower

0.10

2.50

300

400

500.00

Lavatory

3.00

2.50

15

400

750.00

Total daily volume

3,180.00

Annual work days

260

Annual volume

826,800.00

LEED Calculations - Design

Exemplary performance

WE Prerequisite : Water Use Reduction

Sample Project: 400 occupants (50:50) Fixture Type

Daily Uses

Flow rate (GPF)

Duration(flush)

Occupants

Water Use (gal)

Water Closet (Female)

3.00

0.80

1

200

480.00

Water Closet (Male)

1.00

0.80

1

200

160.00

Urinal (Male)

2.00

0.50

1

200

200.00

Fixture Type

Daily Uses

Flow rate (GPM)

Duration(sec)

Occupants

Water Use (gal)

Kitchen Sink

1.00

1.80

15

400

180.00

Shower

0.10

1.80

300

400

360.00

Lavatory

3.00

1.80

15

400

432.00

Total Daily Volume

1,812.00

Annual Work Days

260

Annual volume

471,120.00

% Reduction compared to baseline

43.02%

Green Building Research Institute WWW.GBRIONLINE.ORG

WE Credit 2: Indoor Water Use Reduction

Existing bldgs, schools, retail, hospitality, warehouses & distribution centers- (1-5 pts) Data Centers -1-4 pts

Associated Credits

To minimize indoor water consumption.

• WE Prerequisite BuildingLevel Water Metering

OPTION 1. Calculated water use (1-5 pts except data centers, 1-4 pts data centers)

• WE Credit Water Metering

Referenced Standards • The Energy Policy Act of 1992 and as amended.

• EPAct 2005 • International Association of Plumbing and Mechanical Officials Publication IAPMO/ANSI UPC 1-2006, Uniform Plumbing Code 2006, Section 402.0, Water Conserving Fixtures and Fittings • Energy Star

Establishment – None Performance Install fixtures that use less water than the baseline calculated in WE Prerequisite Indoor water-use reduction. Additional Percentage Reduction

Points (except data centers)

Points (Data centers)

10%

1

1

15%

2

2

20%

3

3

25%

4

4

30%

5

Exemplary performance

Referenced Standards •WaterSense • International Code Council, International Plumbing Code 2006, Section 604, Design of Building Water Distribution System • Consortium for Energy Efficiency •IgCC/ASHRAE 189.1 – cooling tower and evaporative condenser requirements

WE Credit 2: Indoor Water Use Reduction OPTION 2. Metered Water Use (1-5 pts except data centers, 1-4 pts data centers) Establishment Meter fixtures and fittings, and record meter data for one year to establish a water-use baseline. Performance For projects with min. 80% of fixtures and fittings metered, demonstrate a reduction from the baseline year of meter data. Additional Percentage Reduction

Points (except data centers)

Points (Data centers)