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LEED AP BD+C Exam, Version 4 > WE (Water Efficiency) Advanced 1 > Flashcards

WE (Water Efficiency) Advanced 1 Flashcards

(44 cards)

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1
Q

What action is required first to achieve WE C3, Cooling Tower Water Use?

A

-hire a water treatment professional to conduct a one-time water analysis to identify the concentration parameters of the condenser water.

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2
Q

What 4 pieces of information about plumbing fixtures must be entered into the calculator when calculating the design case for indoor water use?

A
  • type of fixture
  • flush or flow rate
  • manufacturer and model
  • percentage of occupants using the fixture
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3
Q

Calculation for daily baseline water use…

A 
Women= 3 water closet uses
Men= 1 water closet use, 2 urinal uses
Faucet= 3 uses per day per FTE at 30 second use
Water Closet= 1.6gpf
Urinal= 1.0gpf
Faucet= .5gpm

Example: Calculate the daily baseline water use for an office space with 2 men and 1 woman.

2 x 1.6 = 3.2 gallons/day (men wc)
4 x 1.0 = 4.0 gallons/day (men urinal)
3 x 1.6 = 4.8 gallons/day (women wc)

Sink= (3 FTE x 3 uses/day x 30 seconds) / 60 seconds = 4.5
4.5 x 0.5 gallons/minute = 2.25 gallons/day

Total= 3.2 + 4.0 + 4.8 + 2.25 = 14.25 gallons/day

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4
Q

Indoor water use baseline case consists of what information?

A

Amount of water used based on only code minimum fixtures and fittings flow rates set by EPAct 1992

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5
Q

Projects pursuing points under WE C2, Indoor Water Use Reduction must show what?

A

Project fixtures in AGGREGATE meet the requirements

-WaterSense is a prerequisite, usage-based calculations are required for credit compliance

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6
Q

What must be metered to achieve WE P3, Building-Level Water Metering?

A

Building and grounds potable water use

-data must be shared with USGBC for 5 years

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7
Q

What fixtures can have the WaterSense label?

A
  • tank type toilets
  • water using urinals
  • PRIVATE lavatory faucets
  • shower heads
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8
Q

What fixtures do NOT have the WaterSense label?

A
  • tankless toilets
  • composting toilets
  • waterless toilets
  • waterless urinals
  • PUBLIC lavatory faucet
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9
Q

Acceptable sources of alternative water…

A
  • reverse osmosis reject water
  • foundation dewatering water
  • used process water

???

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10
Q

What flow rate is allowed for aerators?

A
  1. 8 gpm minimum

1. 5 gpm maximum

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11
Q

Maximum number of cycles calculation…

A

A

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12
Q

If a project plans to use a rain water collection system to offset indoor potable water use for toilet flushing, what does the project team need to include with the narrative?

A

Drawing highlighting the non-potable water system with the supply and demand calculations

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13
Q

How is building level water meter data shared with USGBC on a monthly basis?

A
  • through Energy Star’s Portfolio Manager

- through approved 3rd party data sources

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14
Q

How many prerequisites are there for WE Water Efficiency and what are they?

A

3 prerequisites

P1. Outdoor Water Use Reduction
P2. Indoor Water Use Reduction
P3. Building-Level Water Metering

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15
Q

How many credits are there for WE Water Efficiency and what are they?

A

4 credits

C1. Outdoor Water Use Reduction
C2. Indoor Water Use Reduction
C3. Cooling Tower Water Use
C4. Water Metering

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16
Q

What is required for meeting WE P1, Outdoor Water Use Reduction Option 1?

A

Demonstrate the landscape does not require a permanent irrigation system beyond a maximum of 2 years

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17
Q

Which pieces of information must be provided in the plant species and water requirement narrative for WE P1, Outdoor Water Use Reduction?

A
  • a description of the plants

- an indication of why the average rainfall will be sufficient

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18
Q

What is required for meeting WE P1, Outdoor Water Use Reduction Option 2?

Study These Flashcards
A

30% reduction in irrigation from baseline for peak watering month

19
Q

What is the requirement for meeting WE P2, Indoor Water Use Reduction?

Study These Flashcards
A

20% AGGREGATE water consumption reduction from baseline

20
Q

What defines exemplary performance for WE P2, Indoor Water Use Reduction?

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A

55% AGGREGATE water consumption reduction from baseline

21
Q

For WE P2, Indoor Water Use Reduction, what are the allowable water usage rates for fixtures?

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A
  • toilet= 1.6 gpf
  • urinal= 1.0 gpf
  • public lavatory= 0.5 gpm at 60 psi
  • private lavatory= 2.2 gpm at 60 psi
  • kitchen faucet= 2.2 gpm at 60 psi
  • shower head= 2.5 gpm at 80 psi
22
Q

For WE P2, Indoor Water Use Reduction, what are the prerequisite requirements for cooling towers and evaporative condensers?

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A

Equipment must have:

  • makeup water meters
  • conductivity controllers and overflow alarms
  • efficient drift eliminators
23
Q

If a project is using the prescriptive path for WE P2, Indoor Water Use Reduction and NOT pursuing any credits for WE C2, Indoor Water Use Reduction what information must be documented?

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A

-product cut sheets and fixture schedules showing all fixtures are WaterSense labeled

24
Q

What water-using equipment is allowed to be excluded from WE P2, Indoor Water Use Reduction?

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A
  • equipment related to human consumption
    • such as soda machines and coffee machines
  • fixtures used for filling sinks that wash produce
  • janitor sinks

???

25
What are the requirements for WE P1, Building Level Water Metering?
- Install permanent meters to measure total POTABLE water usage for the BUILDING and the associated GROUNDS. - Data must be compiled into monthly and annual reports which shall be shared with USGBC for a 5 year period. - When public meters are restricted, project must install meters DOWNSTREAM or potentially submit monthly billing statements as an alternative???
26
What are the 2 options for WE C1, Outdoor Water Use Reduction?
Option 1. No irrigation required | Option 2. Reduced irrigation
27
To achieve points for WE C1, Outdoor Water Use Reduction Option 2 what is required?
- 50% reduction from baseline (prerequisite already requires 30% reduction, goal is to find another 20%) - credit uses technology and alternative water sources WHEREAS the prerequisite uses plant selection and design
28
What non-potable water is acceptable for to achieve points for WE C1, Outdoor Water Use Reduction Option 2?
Graywater and rainwater
29
When using alternative water sources for irrigation what should the water be tested for?
Salinity levels which can be harmful
30
To achieve points for WE C1, Outdoor Water Use Reduction Option 2 what technology automatically earns 15% reduction?
The use of smart irrigation controls that meet WaterSense criteria
31
Define PRIVATE LAVATORY FAUCET
Refers to hotel rooms or patient rooms lavatories only. All others are considered public.
32
For WE P2, Indoor Water Use Reduction which fixtures are required to have WaterSense labels?
-toilets, urinals, PRIVATE lavatory faucets, and shower heads
33
Define XERISCAPING
Landscape practice of not using or reducing the need for irrigation
34
What is the formula for make-up water in a cooling tower?
Make-up = Evaporation + Blowdown + Drift
35
What is the ideal temperature for hot water?
120 degrees (down from the typical 140 degrees)
36
What are some possible simple payback durations and water reduction (%) for: 1. Waterless Urinals 2. Dual flush toilets 3. Ultra Low Flow Showerheads
Potentially in the range of: 1. 3 years (14% water reduction) 2. 2.8 years (10% water reduction) 3. 1.5 years
37
For WE P1, Outdoor Water Use Reduction 30%, what must the reduction come from?
The first 30% reduction must be achieved through plant selection and irrigation efficiency only.
38
For WE P2, Indoor Water Use Reduction 20%, what must the reduction come from?
The first 20% must be achieved through the use of efficient fixtures only.
39
Stop on page 79
A
40
WE C2 Adaptions
Pg 82
41
What are the requirements to earn points for WE C4, Water Metering?
Projects must include permanent water meters for 2 or more of the following: 1. Irrigation, meter water serving at least 80% of the irrigated landscape area 2. Indoor, meter water systems serving at least 80% of indoor fixtures 3. Domestic Hot Water, meter water use of at least 80% of the installed hot water heating capacity 4. Boilers, meter annual water use greater than 100,000 gallons 5. Reclaimed Water, meter regardless of rate 6. Processed water, meter 80% of process water
42
WE C4 Healthcare Adaption
Pg 86
43
Define CYCLES OF CONCENTRATION
Calculated ratio of concentration of dissolved solids in the blowdown water compared to the make-up water.
44
Maximizing what will minimize blowdown water quantity and reduce make-up water demand on cooling towers?
Cycles of concentration, most systems operate at 2 to 4 cycles while 6 cycles is possible. Increasing cycles from 3 to 6 reduces make-up water by 20% and blowdown by 50%

LEED AP BD+C Exam, Version 4 (16 decks)

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